Twin Rotex blown lsx Nelson Racing

[TOM NELSON]

Heres a couple of shots of a twin blown lsx 402 we just finished.I put a stock z06 cam in this sucker to try to build a super quiet super enjoyable streeter.This thing idles so smooth it's awesome.It made 630 ft lbs at 4900 rpm and 640 hp at6100rpm at 8 psi and 780 ft lbs and 800 hp at 13 psi on pump gas.Really a nice cruiser that will get with the program.

[customcam]

Tom ur an Animal man
i seen the vid of the white camaro TT that thing is plain awsome :cheers:

[syborg tt]

that is really nice looking

?? No intercooler

[tyoneal]

Heres a couple of shots of a twin blown lsx 402 we just finished.I put a stock z06 cam in this sucker to try to build a super quiet super enjoyable streeter.This thing idles so smooth it's awesome.It made 630 ft lbs at 4900 rpm and 640 hp at6100rpm at 8 psi and 780 ft lbs and 800 hp at 13 psi on pump gas.Really a nice cruiser that will get with the program.
=================================
Price?
Specs?

Thanks,

Ty

[AllSpeedAndy]

Very nice peice!!!!!:hail:

now with those rotex blowers, are two needed do to cfm out put?
what is max cfm and rpm for one of those? ( I think they have a veriable speed trany in them?) or do they have different models with
diff. out puts...etc.?

on the units you have on this set up how do they compare to the C-2
procharger head unit? (if i'm in the ballpark)

[XcYZ]

Pretty wild, Tom!

[dave96dcm]

The Rotrex blowers are rather small European superchargers, they are not designed for big engines, which is why you need two of them, they are great superchargers. http://www.rotrex.com/

Tom what is the weight of that mounting plate? It looks like 1 inch billet, I'm just curious how the weight of one of these engines would compare to a similar hp twin turbo engine. I'm assuming that you ran it with a intercooler, so all of the charge piping and intercooler probably weighs the same as a tt setup.

[Speedster]

Always pushing the envelope with the latest technologies... Sweet :thumbsup:

[TOM NELSON]

The Rotrex blowers are rather small European superchargers, they are not designed for big engines, which is why you need two of them, they are great superchargers. http://www.rotrex.com/

Tom what is the weight of that mounting plate? It looks like 1 inch billet, I'm just curious how the weight of one of these engines would compare to a similar hp twin turbo engine. I'm assuming that you ran it with a intercooler, so all of the charge piping and intercooler probably weighs the same as a tt setup.
It's a 3/4 inch piece the weight is comparable i would say to a turbo set up

[Bowtieracing]

Tom this is totally something really intresting!!!!!! I have been wondering a long time why W2W seems to been only one to realize potential of Rotex blowers. And you even packed those really nice:cheers:

Let us know more and pics too!!!!

[TOM NELSON]

Very nice peice!!!!!:hail:

now with those rotex blowers, are two needed do to cfm out put?
what is max cfm and rpm for one of those? ( I think they have a veriable speed trany in them?) or do they have different models with
diff. out puts...etc.?

on the units you have on this set up how do they compare to the C-2
procharger head unit? (if i'm in the ballpark)

We used two 81 units Which are the biggest units.We didn't push the envelope with these I would say there getting close to max at around 900 to 1000 hp on this set up .But the belt is really working hard at that level.

[TOM NELSON]

that is really nice looking

?? No intercooler
We ran an air to air the same one we use on the turbo dyno's

[TOM NELSON]

=================================
Price?
Specs?

Thanks,

Ty
This engine complete just like you see it with pumps and filter ,management,ignition etc. dynoed is 27000.00
The engine is a 402 cubic inch ls2 with cnc ported l92 cylinder heads,inconel ex valves,Callies 4340 forged crank 4.0 stroke,Callies 4340 forged h beams,Forged Je pistons,Hell fire rings,Zo6 hydrualic roller cam and lifters,smith bros pushrods,Arp hardware,Nick williams 90mm tb,Fast 65 lb injectors,Electromotive engine management and ignition,Full F body accersory drive system Ac,power steering,alt water pump.Painted the color you like

[awr68]

Very cool Tom!! :thumbsup:

[Bowtieracing]

This engine complete just like you see it with pumps and filter ,management,ignition etc. dynoed is 27000.00
The engine is a 402 cubic inch ls2 with cnc ported l92 cylinder heads,inconel ex valves,Callies 4340 forged crank 4.0 stroke,Callies 4340 forged h beams,Forged Je pistons,Hell fire rings,Zo6 hydrualic roller cam and lifters,smith bros pushrods,Arp hardware,Nick williams 90mm tb,Fast 65 lb injectors,Electromotive engine management and ignition,Full F body accersory drive system Ac,power steering,alt water pump.Painted the color you like


Tom this is going to be serious competitor for cammed crate LS7:wow:

How long have you been working with rotrex blowers,what do you think of those ?

[TOM NELSON]

This is the only graph i could find to post.Running very rich on this pull but you can see the power curve and get an idea how it comes on boost and make it's power.Just keep in mind this is with a bone stock cam and 8.5 compression.

[TOM NELSON]

Tom this is going to be serious competitor for cammed crate LS7:wow:

How long have you been working with rotrex blowers,what do you think of those ?
This is the first rotex weve done.Everything has it's place .I think as a super driver with good power this combo is killer.If your looking for big power this is not the way.But i think for most this will be enough.on the next one we do i will make a 12 rib set up on the belt and be sending a 12 rib to this customer.I could see the belt wearing pretty fast.It lasted all the dynoing but i think a 12 rib would cure the deal up to around 15 psi.The real draw with this motor is how tame and docile it is It will be like driving a new car but with a **** load of power.But click it in overdrive and turn the radio on and enjoy.Smoke a viper if he happens to come your way in the mean time.Thats the beauty of forced induction the turbo motors are same way they will do the same thing but probally twice the power output but they also cost about 10k more .Just another way to skin a cat.

[TEDDYS CAMARO]

Very Very Nice!!

[bmxmon]

Very nice! You do good work. Have you ever messed around with E85?

[dave96dcm]

81 units? The biggest that they list on their website is the c-38.

[Bowtieracing]

81 units? The biggest that they list on their website is the c-38.

I belive Tom was referring C38-81 wich is listed as an biggest in Rotrex web site.


Tom can you show pics behind the mounting plate ? Do these need blow off valves ? Did you build the pulleys and tensioner in house ?

And last ; could you consider selling the mounting plate,rotrex units and pulleys only ?

[TOM NELSON]

This is the only shot i have.I can sell you the blowers ,drive plate,pulleys ,tentioners and i would make it a 12 rib for around 8000.00

[Jr]

Tom,
How quiet is the supercharger system? Is it loud like turbos, centi, or roots?

[TOM NELSON]

Tom,
How quiet is the supercharger system? Is it loud like turbos, centi, or roots?
They sound kind of like a turbo set up.The motor sounds really good on the rev you can hear the positive pressure coming out the pipe.

[Jr]

Tom,
What is this motor going into?