Hard time Choosing.. built LS2 or stock LS7 give me your vote!

[Mr.VENGEANCE]

what ya think?...

looks like it time to choose my engine.

I started out wanting a LS2 in Venny..

NOW i want an LS7..

i can afford the LS7 but am i being too much?

so please help me choose..

LS7 witch is stock is 505 hp crate from Summit.

or

LS2 built from TurnKey engine supply.. 550 hp.

both are relatively the same price.. ls7 13k.. ls2 is 13.1k
and i can pick up the LS7 being that summit is here in GA.

i know there is alot of potential for the LS7 if i build it.. but hell strait out of the crate tuned to 550.. id like to get around 600 when all is said and done.. but also im rediculous and want something pretty exotic.

both will be running a Monster built 4L60E with Twist machines paddle shrifter.. sitting in a Art Morrison AME subframe done to the hilt.


if you were in my shoes.. which would you choose?

thanks fellas!

[69Nova]

Ls7...

[monza]

Built LS7

[70gotboost]

blown LS7 = 600+hp

:thumbsup:

[deuce_454]

hmmm i would go with the built ls-2 that way you can choose what kind of powerband you want....there is no dry sump tank and plumbing.. and if it were me i would buy one that was built for boost and bolt on a pair of turbos (you are going to need headers anyway, and why not buy a pair from schwartz that accept turbos???)

[69Nova]

hmmm i would go with the built ls-2 that way you can choose what kind of powerband you want....there is no dry sump tank and plumbing.. and if it were me i would buy one that was built for boost and bolt on a pair of turbos (you are going to need headers anyway, and why not buy a pair from schwartz that accept turbos???)

If your trying to build a killer all around car forget turbos. Plus wouldnt the LS7 have a killer powerband since it would be a stock motor with possibly a few bolt-on's.

[syborg tt]

I agree - to much extra plumbing clutters up the engine bay

hmmm i would go with the built ls-2 that way you can choose what kind of powerband you want....there is no dry sump tank and plumbing.. and if it were me i would buy one that was built for boost and bolt on a pair of turbos (you are going to need headers anyway, and why not buy a pair from schwartz that accept turbos???)

[camcojb]

If your trying to build a killer all around car forget turbos.


:wow: :faint:

Jody

[deuce_454]

I agree - to much extra plumbing clutters up the engine bay

i can see why you´d agree to that statement, i stand corrected!

[DB Z28]

It realy don,t take much of a effort to build a 600hp ls-7.

[slenning]

I had to make the same choice and chose the LS7.

I swapped in a Katech Torquer cam and am using ATS's headers. Katech says that they dyno'd this combo and got 595hp, 575 tq. I haven't got the car on a chassis dyno yet but hope to soon. I will post the results when I do.

BTW, its a blast to drive!!

[lil427z]

LS7.
rickk:D

[Mr.VENGEANCE]

I was gonna ask you what you thought about it, Slenning..

what did you do for dry sup pan, tank and plumbing?

[slenning]

ATS oil pan, Peterson 6qt. oil tank (coulda,shoulda got the 8 qt tank), CV Products remote oil filter. System holds 9 qts.
http://img300.imageshack.us/img300/7325/img3182pn8.jpg (http://imageshack.us)
Earls lines and Black AnoTuff fittings

[customcam]

LSX 454 = 700hp on pump :thumbsup:

[chicane]

blown LS7 = 600+hp

:thumbsup:


Normally asperated LS7 with a UMI/MSD MEFI4, a simple cam change... and the right headers = 625+ hp

[69Nova]

:wow: :faint:

Jody

LOL! His car is more of a streetfighter than your car. I just think all the hassle and extra weight are not need. Especialy since he is not going for gobs of power.

P.S. I love your car.

[chicane]

:wow: :faint:

Jody

Ya know... there are people here on this site with more brains than money... :lol:

[Mr.VENGEANCE]

LOL! His car is more of a streetfighter


yea.. i plan on seeing the track VERY often.. i went to the track last weekend in Talladega with a Porsche and G35 club and had a great time.

its IMPERATIVE to see alot of track time.. at least after that experience.

not saying its going to be a track car.. but itll see enough of it.

[victionone]

Definitely a LS7 if budget permits. You can throw a cam in there down the line and then no built LS2 will be able to touch it. The LS2 does seem like a bargain though since it can be had for $6000 with transmission, PCM and harness. A LS7 setup is easily triple that price, but then it will be brand new.

[ArisESQ]

I would go with the built up LS2 myself. Dry sump may be a bit of a hassle, eventhough it would be pretty sweet.

[4mm]

How much again is a 500rwhp LS2?

I am going with an LS3. The new stock crate LS3 engine from GM is ~$5900+accessories, and with a rather mild cam I will be making 500rwhp with a very nice TQ curve. IMO, the best factory LSx engine besides the LS7.

[Spiffav8]

I've been asking the same question, LS2 or LS7. It's a tuff call. I still haven't decided yet but I still need to talk to Tyler about it.

For now I'm going to vote LS7, but I suggest you call ATS and see what Tyler has to say about and get all the pros and cons up front.

Let me know what you decide.

[deuce_454]

what did you end up going with....

my vote is still, LS7 if you leave it alone, once you get into cam change and such the warranty is voided, and you can get the same power cheaper from a built to your specs LS2.. like a HO L92 from Mast... more power 540, better idle (variable timing), less money (11.2K including ECM).. still under warranty! .. or their 427 L92 at 14K..

[R67Chevelle]

Cuz of the dry and wet sump set up, I would go with the LS2, but I would call taylor with Mizfit Motor Sports a Later-g sponsor first (lets support sponsors first before we seek elsewhere is my moto). We could build you a much better 400+ with more power cheaper then turnkey and probably equal or better quality... :thumbsup:

see the following and PM Taylor

Taylor Day
913-558-1100
www.mizfitmotorsports.com
[email protected]
"Ouroboros" www.fquick.com/Mizfit
Your Source for LS1 Crate motors
LSX Strokers: LS1,LS6,LS2,LS7,L92, GM LSX
347,383,402,408,414,427,454 coming soon 500+CID




Blessings,

[Mr.VENGEANCE]

Well i havent come to the engine purchase JUST yet..

ive found a LS7 with 4000 miles on it for 7500.. i might scoop it up.
it was taken out for a LSX motor..

[jeff hanson]

Well i havent come to the engine purchase JUST yet..

ive found a LS7 with 4000 miles on it for 7500.. i might scoop it up.
it was taken out for a LSX motor..
There's your answer! Do it.:thumbsup:

[tellyv]

Theres a guy on ebay selling modified ls3 with a 6 speed all new stuff with harness and ready to run claims thay make over 500hp easy for under 10k look it up sounds cheap and the guy is cool he answered my emails instantly, or if you want any ls type motor built call wegner automotive (920)394-3557 (they build bush and alot of other race series engines) ask for Carl or Dan they basically started all the carburated ls stuff they build everything and make killer hp can set it up with fi or carb and they make all front dress detroit speed sells it but they'll hook you up if you get a motor tell them telly sent ya.

[h_leadfoot]

Theres a guy on ebay selling modified ls3 with a 6 speed all new stuff with harness and ready to run claims thay make over 500hp easy for under 10k look it up sounds cheap and the guy is cool he answered my emails instantly.

I buoght a combo from him. I can only say that he is a really nice guy doing buissnes with. I recomend him strongly! :yes:

[James OLC]

Well i havent come to the engine purchase JUST yet..

ive found a LS7 with 4000 miles on it for 7500.. i might scoop it up.
it was taken out for a LSX motor..


That's the route I went. Found a 5000 mile takeout for cheap and then sent it to Katech for a full build. From my own experience I would offer this advice (1) if possible, have a dealership inspect the engine in the car as it is - That way if there are any warranty issues to deal with you can get them taken care of before hand (I did that and found issues with 2 pistons) and (2) when you buy a cheap takeout be prepared for some potential repair costs.

In my case I came across a dude on LS1tech who was taking an LS7 out of an 07 Z06 at W2W for a twin turbo setup that was being built from the ground up. Kurt emailed one morning and said that he thought the engine had a rattle cold at start up and had a dealer take a look at it. Said dealer eventually wound up replacing two pistons and suggested that the failure may have been a result of detonation (nitrous). Buddy denied ever having spray on the car. It was always my plan for Katech to do the Street Attack build so I sent it over when it was (eventually) done at W2W. During the inspection and machining of the block, Katech found one valve guide that did not meet their specifications as well as some deformation between two cylinders (minor, machinable, but there none the less). Their conclusion - detonation, probably related to nitrous.

For me, not a big deal since I went into it with the intention of a full rebuild. If I had bought it and planned on dropping it in with the assumption that it would run (hard) forever as is - it would not have happened.

I definately don't regret doing the deal - heck, it allowed me to build what I wanted for what a crate would have cost but my suggestion is, if you go that route, have your eyes open on your way in. You have to figure that anyone throwing an LSx in and taking an LS7 out already knows the upper end performance of the LS7.

Just my 2 bits. Good luck.

[Mr.VENGEANCE]

whoa back from the dead..

Yea i ended up with that LS7 engine.. i hope there isnt any problems i havent gone through it yet..

I got if from IPSmotorsports and they seem pretty legit.. and it was out of an 07 because he wanted to put in a blown LSX motor...

and i DID find him on LStech...

[ss dave]

Good Choice! I luv my LS7. I putting down a legit 502 rwhp with mine. You won't be disappointed.

[E.rodz]

I think you need to ask your self a few questions first. how is the car going to be driven and for what purpose is it intended for. the reason that gm decided to go with a smallercube ls9 is the wallthickness of the cyl. does not work with higher boost presures.me personaly would go with the ls2 for the reason.I PUT ALOT OF MILES ON MY BUILDS.gas milage can be a big factor.the dry sump is cool but ads alot more custom fab time and more plumming. but if you are autocrossing this would be better.what do you want to do with the car needs to answered first.if you want to have a street racer throw a 150hp shot of nitrous to a ls2.:captain: either way you can not go wrong with a ls motor.