Build Pics of Nre's TT LSx's

[TOM NELSON]

Well better late than never I finally got around to uploading some pics of the builds on the Twin Turbo LSX motors we sold a while back here on the forums.I promised everyone i would walk you threw the build so here goes.Heres a shot of the LSX block being bored we register off the main saddles so the bores are 90 degrees to the mains.http://www.nelsonracingengines.com/ls-build-up/32-ls-build.jpg

[TOM NELSON]

Heres the block getting set up to deck we also register the block off the main saddles to cut the decks so they are also straight with the main saddle that way all the deck heights are the same side to side and front to back we also have come up with a special surface finish we like that works really well with the head gaskets we use. http://www.nelsonracingengines.com/ls-build-up/3-ls-build.jpg

[BritishGreen68]

i hope your uploading more pics right now:bow: If i ever win the lottery im going to buy a NRE turbo motor!

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/30-ls-build.jpg

[TOM NELSON]

Here we are honing the block in this pic we like to use the exact head gasket,fasteners,and lube and torque specs that we will use in the Final assembly.The plate you see on the deck is to simulate the distortion the head bolts will put on the bore when its torqued.Over the years weve devolped and multi step finishing process that really gives great leak down numbers. http://www.nelsonracingengines.com/ls-build-up/28-ls-build.jpg

[TOM NELSON]

Here we are oringing the deck surface of the block we set the depth at a specific height which gives the oring a positive out of the block but not to much that it won't set into the gasket correctly and end up leaking water.http://www.nelsonracingengines.com/ls-build-up/4-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/17-ls-build.jpgHeres some shots of the Billet Oliver connecting rods we use.These things are beef we order them in the heavy weight version for this engine i prefer the strength over the weight.I've run this rod over 2500 hp with no problems in the ls's Notice the bearing shells we use a bearing that has a very thin overlay of material this provides more fatigue resistance and prevents the bearing from flaking under big power.It has less imbedabilty so it won't take alot of dirt in the oil but some one who owns one of these should no better anyways.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/18-ls-build.jpgHeres the piston we use on the build up notice the lower ring land for the top ring also we use a pressure relief groove in the piston to help excess pressure not unload the top ring.Notice the top ring its a special ring weve found the it is extremely flat 3 to 4 times flater than most this helps ring seal it also will hold up under boosted heat normal plasma moly rings will not do the job in a boosted application the moly will end up flaking off under the heat and you will lose ring seal.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/16-ls-build.jpgAnother shot of the piston showing the coating on the side skirts

[TOM NELSON]

Heres a shot of the mallory slugs we installed in the counter weight to get the crank to spin true.Mallory is much denser and heavier than the 4340 it replaces so it makes the crankshaft heavier in this position which is what we needed for this applicationhttp://www.nelsonracingengines.com/ls-build-up/1-ls-build.jpg

[Speedster]

Cool stuff Tom.

Those engines should ROCK !!!:D

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/15-ls-build.jpg if we can we also like to trim cut the counter weight instead of drilling holes for less oil windage

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/27-ls-build.jpg this is the crank with the bob weights attached to the rod pins spinning at a balance speed the bob weights are filled with lead shot that equals the exact weight of the pistons,pins,rings,bearings,locks,connecting rods and some oil allowances.We like to balance old school on a non computer machine with floating sensors so if the crank is out of balance you will see imediately it will shake like crazy.It takes quite a bit longer but you no its right when it taken off the machine.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/10-ls-build.jpg
Heres the bare l92/ls3 cyl head getting the chambers ported its pretty amazing to watch the cnc cut these heads So i made a video of it and of a bunch of the little tricks in cyl heads for you guys i will post in next week some time but heres a buch of photos in the mean time

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/11-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/12-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/13-ls-build.jpg

[TOM NELSON]

This is one of the most important aspects of cyl head work is knowing what seat profile to put on the combination your working on.Seat angles,radius,widths are super super important.You can have and incredible port and kill the head with the wrong valve job.The Valve job allows the air to get around the valve into the cylinder.Heres a few shots of the head being cut and set uphttp://www.nelsonracingengines.com/ls-build-up/14-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/2-ls-build.jpg

[TOM NELSON]

Here we are testing each spring individually to make sure the spring pressures are up to snuff.I like to have specific open and closed presures to control the valve at speed and especially under boost,because with a boosted engine you not only are fighting rpm but extra pressure thats being applied to the back of the valve.If this is wrong float city and the motor will usually decideshttp://www.nelsonracingengines.com/ls-build-up/9-ls-build.jpg it wants to eat the valve.

[TOM NELSON]

You can never be to clean cleaning everythhttp://www.nelsonracingengines.com/ls-build-up/8-ls-build.jpging not only makes them proper for assembly but allows you to inspect the part for the last time before final assembly

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/7-ls-build.jpg
here we are setting up the installed heights the installed height is the distance between where the spring seats on the bottom of the retainer and where the spring seats on the head on the whats called the spring pad.To increase pressure or equalize pressures from spring to spring or variances in installed heights we use shims underneath the spring cups to make everything equal.

[waynieZ]

Amazing is all I can say

[TOM NELSON]

The flow bench is much like a lie detector like a dyno is it measures how much air flows threw the port at given valve lifts.It has taught us huge amounts about horsepower production so we flow the heads to make sure its doing what its suppose to do these particular heads flowed 357 cfm at 650 lift on the intake and 260 cfm on the ex at 650 the ex ports on ls engines are known for being weak suck compared to there intake counter part.So there is quite a bit of work done to the exhuast side of this head.http://www.nelsonracingengines.com/ls-build-up/25-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/26-ls-build.jpg

[TOM NELSON]

Heres a shot of the head finished notice we lap each valve to its specific seat and label them .Also we use ex valves made from inconel material this material withstands much more heat then stainless and in a turbo application you need this because the cycling of the valve will cause the head to actually deform and tulip when its glowing red hot.http://www.nelsonracingengines.com/ls-build-up/5-ls-build.jpg

[TOM NELSON]

Thats about it for today i'm all typed out next week all post a bunch more of the assembly and finish of them

[badmatt]

Looks good!

how are your L92 head holding up around the 1200hp mark? any issues with head lifting? or pushing water?

Matt

[wedged]

the installed height is the distance between the bottom of the retainer and the top of the head where the springs sits.


fixed ! :lol: I can appreciate that, I make typos I have to fix all of the time.

[Bowtieracing]

Thank you Tom for the LSx walk . Super intresting!!! :bow:

Cant wait to see more!!!

[GregWeld]

Love this stuff -- WAY KOOL and not OLD SKOOL!

:>)

[Kendall Burleson]

The flow bench is much like a lie detector like a dyno is it measures how much air flows threw the port at given valve lifts.It has taught us huge amounts about horsepower production so we flow the heads to make sure its doing what its suppose to do these particular heads flowed 357 cfm at 650 lift on the intake and 260 cfm on the ex at 650 the ex ports on ls engines are known for being weak suck compared to there intake counter part.So there is quite a bit of work done to the exhuast side of this head.http://www.nelsonracingengines.com/ls-build-up/25-ls-build.jpg

How much test pressure(inch) do you flow the turbo engine at? killer setup I like the honing plate.:yes:

[TOM NELSON]

How much test pressure(inch) do you flow the turbo engine at? killer setup I like the honing plate.:yes:We flow at 28 inchs of water Thanks Tom

[TOM NELSON]

Well i found some of the other pics i had taken so i'm going to back up a bit for a few posts.Heres a shot of us checking and aline honing the main saddles to the housing size we like to see this is one of the first things we do once we know the block is soundhttp://www.nelsonracingengines.com/ls-build-up/39-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/41-ls-build.jpg
aline honing it.This basically is a long bar with alinement shoes and cutting stones that we run threw the main saddles to size the hole that we want it to be it also puts a finish on the surface that allows the bearings to transfer heat into the block correctly.Which if you get right will increase the bearing wear

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/43-ls-build.jpg
Again you can never be to clean here we are doing one of the five cleaning process the block will go threw before final assembly.We like to run brushs threw all the galley holes to make sure weve got all the dirt and grit for the final we will do a full soap and water with high pressure and do a laquer thinner and white rags on the cyl walls untill the rag is white when you wipe it.

[TOM NELSON]

I like to check every rod journal and main journal at 90/180/270 and 360 degrees i also will check the journal side to side for taper bell mouth etc.All these numbers are recorded then we torque the bearings in there saddles for the rods and mains and transfer the mic number we got on the rod pin or crank pin and check that particular journal to see what kind of running clearance we have if it is not in the spec we need we will not go any futher until this is fixed.http://www.nelsonracingengines.com/ls-build-up/36-ls-build.jpg

[TOM NELSON]

http://nelsonracingengines.com/ls-build-up/35-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/42-ls-build.jpg

[TOM NELSON]

Once we no all the clearances,Stroker clear,rod bearing clearance,main bearing clearance,piston to wall,piston to pin,ring gaps,deck heights,rod side clearance,cam bearing holes have proper crush in there respective housings,Piston to valve,Piston to counterweight,piston to crank trigger etc.etc.etc.Then we are ready to start assembling the short block.As you can see we would need a zillion more pics to show it all .But here we are installing the crankhttp://www.nelsonracingengines.com/ls-build-up/33-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/40-ls-build.jpg if you havent used one of these tapered ring compressors yet get one they are slick as hell and make installing the piston a piece of cake.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/38-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/22-ls-build.jpg

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/6-ls-build.jpg
This is a close up of the tempered stainless wire we put in the oring groove we cut in the block.It works fantastic and does not lose its postiveness once you torque it once it allways stays out and proud.Harder to install but well worth it

[TOM NELSON]

Love this stuff -- WAY KOOL and not OLD SKOOL!

:>)
Thanks for the compliment

[TOM NELSON]

I'll post a bunch more tommorow talk to you all soon

[Aschle]

Looks very good Tom ! Good builders go the extra mile, you are going 3 or 4 miles...:thumbsup:

Jason

[dodge]

Very Cool...Wayy more interesting than looking at my diesel engine stuff here at work :thumbsup:

[waynieZ]

You build some awesome engines. I have a gen 1 sbc its a World 454 with a 4.250 in bore Will the oring work on my engine to put a small amount of boost to it or is it too tight with the bores that big?
Thanks Wayne

[TOM NELSON]

You build some awesome engines. I have a gen 1 sbc its a World 454 with a 4.250 in bore Will the oring work on my engine to put a small amount of boost to it or is it too tight with the bores that big?
Thanks Wayne

I beleive its to tight i would not try it.There just isn't enough material in my opinion between the walls to hold a round cyl under boost.Let alone trying to get the gasket to set correctly around the oring in that tight of confines.Sorry to give bad news.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/24-ls-build.jpg

This is another really neat thing we do i feel can help you guys out there doing this on your own.I like to pre heat the head when going threw the torquing process so i no its set and sealed before fire up we use 2 heat guns to get each head up to temp it's time consuming and it smells like **** while your doing it because the sealer is melting into the surfaces so make sure you are in a well vented area when you do it,but your copper gasket won't need a retorque this way.

[TOM NELSON]

http://www.nelsonracingengines.com/ls-build-up/23-ls-build.jpg

[TOM NELSON]

Well i'm letting the cat out of the bag a bit here but heres our new cross ram 8 throttlebody intake we made for this combo which everyone on the board upgraded to that bought this package i should have first articles in 3 weeks this has been over a year in devolpment.I will be running a special on the first run for those of you who want to get in on it early.I can tell you that the fabbed version of this was worth almost 50 ft lbs over a l92 intake.Notice the dual injector per cyl for the turbo applications.I feel this will be the best performing intake weve devolped to date there is very little bend in the port and there are 8 2 and 7/16 throttle bores that have a taper design that i've come up with over the last 15 years that flat kicks ahole.It will be available both na with twin filter set ups and with twin plenum boxs for boosted apps.CK it out quite a few more interesting pics of the header construction,turbo construction etc so keep your eye on this post.

[TOM NELSON]

I'll post a better res of this tommorow

[R67Chevelle]

Now that intake is a work of art... Should have some nice torque and quick throttle response.... You are a very talented man Tom.... Craftsmanship is exceptional.....:thumbsup:

Blessings,
AMS

[67ragtp]

Tom,

Will the cross ram intake fit an LS7 head, and do you think it will out perform the stock ls7 manifold in a normally asperated application?

WOW! that piece is a friggen work of art- out did yourself on this one :hail:

Rich

[Al Moreno]

Dudeeeeeeed, that's nice! :thumbsup: :thumbsup:

[Bow Tie 67]

Tom,

Will you post in this thread when the first run of these intakes are ready?

Matt

[TOM NELSON]

Now that intake is a work of art... Should have some nice torque and quick throttle response.... You are a very talented man Tom.... Craftsmanship is exceptional.....:thumbsup:

Blessings,
AMS

Thanks i appreciate the good words

[TOM NELSON]

Tom,

Will the cross ram intake fit an LS7 head, and do you think it will out perform the stock ls7 manifold in a normally asperated application?

WOW! that piece is a friggen work of art- out did yourself on this one :hail:

Rich

Yes it will fit 9.240 deck 9.7 deck 9.8 deck l92 and ls7's No question it will out perform stock ls7 intake but until we actually test it.I won't no the fabbed version runs circles around the ls7 though.

[TOM NELSON]

Dudeeeeeeed, that's nice! :thumbsup: :thumbsup:

Thank you

[TOM NELSON]

Tom,

Will you post in this thread when the first run of these intakes are ready?

Matt

Sure will i should have good dyno videos and data once there ready

[customcam]

far out Tom this is awesome seeing you put these monsters together! :hail:
That intake is Bad ass! Good on you.

[TOM NELSON]

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/xumwFBs6f_E&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/xumwFBs6f_E&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object> This is video of the heads being machined and some things i thought were interesting that you guys would like heres part one

[TOM NELSON]

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[TOM NELSON]

http://www.nelsonracingengines.com/intake/intake01.jpg

[Steve1968LS2]

Great shots Tom.. really really good work!

I'm going to need to an engine story at your shop... your stuff just photographs so well.

Plus it would be good to show people the RIGHT way to do it.

Very cool.

[waynieZ]

This is so interesting . How often do you have to change the cutter when your doing valve jobs? Does the CNC machine compensate for wear on the carbide tip? Its like watching the Discovery channel but with my favorite subject . Thanks Tom This is great.
Wayne

[Bowtieracing]

More please:cool:

[XcYZ]

Great detailed shots, Tom. :thumbsup:

Keep us posted on that new intake. I'm interested on how the fuel rails will look.

[tones2SS]

WOW!!! This is some sick stuff right there.
Looking good guys!:cheers:

[speedshftr]

nelson i knew you guys were the cream of the crop but that guy richard is awsum/he is the man

[TOM NELSON]

Well heres the first article still very rough but exciting this should be a real incredible option for all l92/ls7/all pro etc users we also designed it to work with standard deck 9.7 deck and 9.8 deck for the stroker guys.I keep you posted as things get finished

[TOM NELSON]

Great shots Tom.. really really good work!

I'm going to need to an engine story at your shop... your stuff just photographs so well.

Plus it would be good to show people the RIGHT way to do it.

Very cool.

Sounds good to me whenever your ready

[TOM NELSON]

This is so interesting . How often do you have to change the cutter when your doing valve jobs? Does the CNC machine compensate for wear on the carbide tip? Its like watching the Discovery channel but with my favorite subject . Thanks Tom This is great.
Wayne
the cutter lasts quite a few heads.You can build in compensation but i don't beleive rich does that .When the cutter is worn its replaced.Thanks for the good words Tom

[TOM NELSON]

Great detailed shots, Tom. :thumbsup:

Keep us posted on that new intake. I'm interested on how the fuel rails will look.

The rails are a billet with both passges drilled in one weve designed quite a few but haven't finalized the finished look or logo yet.But they will have the regulation built in which will be nice.We are currently trying to get the drive by wire to mate up and work with this the standard linkage is done.

[enzo]

Well heres the first article still very rough but exciting this should be a real incredible option for all l92/ls7/all pro etc users we also designed it to work with standard deck 9.7 deck and 9.8 deck for the stroker guys.I keep you posted as things get finished

umm when will these be available?

[Bowtieracing]

Anything new on the build up and intake?

[XTRMEASURES]

i love it, what something like that cost?

keep the pics comming........:thumbsup: :hail:

[T_Raven]

Just read through this thread. Really nice stuff.

I was wondering what rags you use to wipe down the cylinders. I went to Wyotech and they taught us to use ATF with "lint free" white rags but I don't know what kind of rags they were or where to get them.

[TOM NELSON]

Anything new on the build up and intake?

we have finished the final article on the casting and it is being tooled for machining should be around 3 to 4 weeks and i will post more

[TOM NELSON]

i love it, what something like that cost?

keep the pics comming........:thumbsup: :hail:

Cost is yet to be determined but it i think many will be pleased with what i will be able to sell it for.

[TOM NELSON]

Just read through this thread. Really nice stuff.

I was wondering what rags you use to wipe down the cylinders. I went to Wyotech and they taught us to use ATF with "lint free" white rags but I don't know what kind of rags they were or where to get them.

I usually use a brawny white paper towel that way i can see when the cylinder wall is clean we use laquer thinner to clean them multiple rags per cylinder with heavy presure from your fingers .I don't use atf anymore we used to do that i use 30weight mineral based now

[Junkie]

I'll be calling you guys to price some stuff out this coming week :thumbsup:

[XTRMEASURES]

.....bump.....

[Bowtieracing]

we have finished the final article on the casting and it is being tooled for machining should be around 3 to 4 weeks and i will post more


Was there talk about OHC heads ??:_paranoid

[Diognes56]

:bow: :bow: :bow:

David

[EddDeeEye]

That intake is killer! Thanks so much for sharing the level of work that goes into building one of your masterpieces! :bow:

[Bowtieracing]

we have finished the final article on the casting and it is being tooled for machining should be around 3 to 4 weeks and i will post more

Anything?

[camcojb]

He has not posted here in almost three years and his pictures no longer show up.