C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LT4 owners, get in here!!

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Old Feb 6, 2006 | 08:25 PM
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Default LT4 owners, get in here!!

How much hp/tq did you guys get at the wheels in stock, or relatively stock form? Thanks.
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Old Feb 6, 2006 | 08:50 PM
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I dunno. A lot? A little? I haven't taken it to the dyno. Feels good to me. I guess I wasn't much help, huh....
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Old Feb 6, 2006 | 09:19 PM
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go to www.grandsportregistry.com and click on the dyno page
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Old Feb 6, 2006 | 10:15 PM
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most people dyno around the 300horsepower range to the wheels. give or take 5 hp. this being the average on a Dynojet from what i have seen personally
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Old Feb 6, 2006 | 10:37 PM
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I added a cam and hooker long tubes = 360rwhp
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Old Feb 6, 2006 | 11:46 PM
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3ish years ago, on a Mustang Dyno, only had muffler elims. and Hypertech (I know, it was really cheap, got it mostly to turn fans on earlier) and got like 298rwhp.
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Old Feb 7, 2006 | 02:39 AM
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I've only dynoed my car after I did the heads/cam and then after I went to a 383...actually never dynoed it when it was pretty much stock!
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Old Feb 7, 2006 | 11:16 AM
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298hp/310tq here.
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Old Feb 7, 2006 | 11:39 AM
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Mine came out at 298 hp some years ago with nothing but an
open air cleaner and a K&N. Sorry I don't remember the torque
here at work but it was just over 300 lbs. Not a Mustang, it
was the other standard dyno brand, don't recall.

Have a good'un..................MickyD
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Old Feb 7, 2006 | 12:34 PM
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Mine had a Vortex Rammer (no big deal on a dyno) and Magnaflow mufflers - it made 305RWHP and 315RWTQ.
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Old Feb 7, 2006 | 01:02 PM
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Mid 290s....

why?
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Old Feb 7, 2006 | 01:04 PM
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297hp/311tq with Corsa cat-back
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Old Feb 7, 2006 | 02:36 PM
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Originally Posted by Bluewasp
Mid 290s....

why?
Because I was curious how it would compare to my old LS1.
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Old Feb 7, 2006 | 02:58 PM
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I went 305/310 bone stock, 104k. No mods. dynojet
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Old Feb 7, 2006 | 02:59 PM
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Originally Posted by CLEAN
Because I was curious how it would compare to my old LS1.
LS1's usually put roughly the same hp, with a far worse tq. curve. Not that the LS1 tq curve is bad its just not as good. I beat up on LS1's all the time.
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Old Feb 7, 2006 | 06:24 PM
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307/330 out of my LS1 M6. These numbers look comparable. I would imagine SOTP would be about the same.

Reason I ask, I've been planning on a used C6 in a couple of years, but I've just never gotten over my love of the C4's. For what I was going to pay for a C6, I could easily get ANY LT4 car, except maybe a low mile GS. And w/ the great folks on this forum (mostly nice guys on the C6 side, but more than a few smart *sses and jerks) to get me through the inevitable maintenance problems, I'm thinking more and more about just getting a nice LOW mile LT4, and keeping it forever. Never having driven an LT4, I was just curious how it would feel compared to my old car, which was just quick enough.

Thanks for the responses everyone!

Edit: the M6 was in an '01 Formula. The Fbodies seemed to put down a bit more to the wheels than the vettes did for some reason. My C5 was A4.

Last edited by Vettin08; Feb 7, 2006 at 06:27 PM.
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Old Feb 7, 2006 | 07:17 PM
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not stock. just a mild stroker

514 rwhp @ 7400 rpm
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Old Feb 7, 2006 | 09:20 PM
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I'll stack my LT4 against any LS1 any day. I do a lot of autocrossing and have no trouble from the newer vettes. You can't go wrong with the LT4.

With that being said.. I do love participating in the Nevada Open Road racing....so to that end.... I am in the process of sending my Grand Sport to Lingenfelter's for a bit of fine 'tuning'. I'm going with the 383 rather than the 396 as I need a prolonged high rpm and I don't feel confident enough in the 396, given the thinner cyl wall thickness.

Aside from this... I love the GS / LT4!

Canuck
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Old Feb 8, 2006 | 11:35 AM
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Originally Posted by CLEAN
307/330 out of my LS1 M6. These numbers look comparable. I would imagine SOTP would be about the same.

Reason I ask, I've been planning on a used C6 in a couple of years, but I've just never gotten over my love of the C4's. For what I was going to pay for a C6, I could easily get ANY LT4 car, except maybe a low mile GS. And w/ the great folks on this forum (mostly nice guys on the C6 side, but more than a few smart *sses and jerks) to get me through the inevitable maintenance problems, I'm thinking more and more about just getting a nice LOW mile LT4, and keeping it forever. Never having driven an LT4, I was just curious how it would feel compared to my old car, which was just quick enough.

Thanks for the responses everyone!

Edit: the M6 was in an '01 Formula. The Fbodies seemed to put down a bit more to the wheels than the vettes did for some reason. My C5 was A4.
I ran a 13.2@107 with 2.2 60' bone stock on street tires. My car made 305hp/310tq bone stock. I have raced several LS1 vettes, GTO's and f-bodies, and they are relatively the same stock for stock. I just love the low-end torque I get with the LTX motor compared to the LS1. LT1's have more grunt low-end than the LS1, but get walked up top, whereas with LT4 it has better bottom end and is equally as good up top. With the money you save on a LT4 car, you'll be able to get some bolt-ons and really wake that thing up.

I too was contemplating a LS1 over the LT4, and the my only regret is the interior noise from the C4. Mine is a 96 obviously, and I can garauntee you I have more little squeaks and rattles than any C5. It took me about 2 months to eliminated them all and I still get a lil interior noise every once and while, but hey the car is 10 years old now!

Here is a link of me against a GTO 5.7 on the street. (computer generated of cours )

http://media.putfile.com/Chops-Versus-Daddy
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Old Feb 8, 2006 | 11:42 AM
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Originally Posted by CLEAN
Because I was curious how it would compare to my old LS1.

Two years ago I put my stock LT4 on a Dynojet, along with a friend's stock LS1 C5.
I got 311hp, he got 316.

Two months later, at a different facility and after an LT1Edit, my LT4's chart said 307hp. It was hotter that day, but I think it shows that
A) dynos are not all the same.
B) dyno-tuning may be worth less than the $500 they charge.

(I can't remember the torque values. Sorry.)
Larry
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