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Road race/steet engine. Need 345 rwhp. 5.7 or 5.3?

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Old 03-19-2016, 12:18 AM
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Originally Posted by dailydriver
AGREED!

BUT, try finding one in decent shape, with lower miles in certain areas of the country (maybe EVERYWHERE at this point) due to the damned swappers and drifters snatching them up before they're even on the market. (Sorry, Inflame, NOT directed at you personally. )
(It's almost as if they have some kind of 'sniper app' for this, like on ebay or something. )
Actually I just did, located one halfway across the country out of a CTS-V. Hopefully it is good. It is a pain trying to find a LS6 shortblock or even a 24x LS2. Thankfully I had a friend in the area who could pick it up and store it for me. I remember when I could find one every few weeks within a 4 hr drive. If I run across another one local, I will snag it if possible.

Last edited by 93Polo; 03-19-2016 at 12:23 AM.
Old 03-19-2016, 12:04 PM
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Originally Posted by Inflame
I road race a E36 M3 with an LS6 swap, I highly recommend getting the oil pan baffle especially if the tracks you are visiting have left hand sweepers. Also, a large oil cooler and 15w-50 M1 oil (cheap and effective).

My LS6 is fairly stock, has home made intake and long tubes, made 365whp but the kicker is the table top torque curve peaking at 407lb-ft!
Ha I've got an E36 M3 also. I can't wait to drop an ls1 in it someday. I just love that car.

Do you have videos on YouTube? If so, I need to look you up.


What about a Moroso oil pan? I've always used one on LT1's and have never lost oil pressure in turns.
Old 03-19-2016, 01:32 PM
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If I ditch my lexan spoiler I'm allowed an extra 15 hp. That puts me to 373. Would I need a larger cam than the ls6 to get there?

So now I'm entertaining a slightly larger cam but use stock 02 exhaust manifolds. I'm guessing that'll restrict me enough to use my spoiler. If I remove it, I can then bolt up LT's and get the power I need.

Or are stock manifolds so restrictive the adding a cam won't do anything?

I'm currently trying to figure out how effective the spoiler is at lowering lap times.
Old 03-19-2016, 01:51 PM
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You can get 400+ RWHP out of an ls6 without changing the cam
Old 03-19-2016, 02:37 PM
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i won't have ls6 heads, which flow better than the ls1 heads.
Old 03-19-2016, 02:45 PM
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So then 375 is very possible
Old 03-20-2016, 02:10 PM
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Originally Posted by Steve91T
If I ditch my lexan spoiler I'm allowed an extra 15 hp. That puts me to 373. Would I need a larger cam than the ls6 to get there?

So now I'm entertaining a slightly larger cam but use stock 02 exhaust manifolds. I'm guessing that'll restrict me enough to use my spoiler. If I remove it, I can then bolt up LT's and get the power I need.

Or are stock manifolds so restrictive the adding a cam won't do anything?

I'm currently trying to figure out how effective the spoiler is at lowering lap times.
Does NASA allow you to port/extrude hone the stock iron manifolds?
What about shorties (to save weight mostly), do they allow you to keep the Blaine Fab ducktail, or does it HAVE TO BE the stock iron deals??

Everyone on here will tell you to go with longtubes no matter what, but the above sounds like a plan.
Old 03-20-2016, 04:19 PM
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Originally Posted by dailydriver
Does NASA allow you to port/extrude hone the stock iron manifolds?
What about shorties (to save weight mostly), do they allow you to keep the Blaine Fab ducktail, or does it HAVE TO BE the stock iron deals??

Everyone on here will tell you to go with longtubes no matter what, but the above sounds like a plan.
I can do whatever I want as long as I meet the power to weight. The spoiler does give me a .4 penalty. So my power to weight weight is 9.5 with the spoiler, 9.1 without to stay in TT3.
Old 03-21-2016, 05:13 PM
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Have you done any testing with the spoiler? Consecutive laps with it and without it? That seems like a pretty steep penalty for something that could already be doing more harm than good, depending on the spoiler's design.

I would probably ditch the spoiler and take the extra power, personally.
Old 03-21-2016, 05:38 PM
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^^^The spoiler he is using is adjustable for 'angle of attack', and he is able to lay it down for less rear downforce, or stand it more upright for more rear downforce, IF the particular course dictates that action.
Old 03-21-2016, 06:16 PM
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Good to know. I didn't mean to insult anyone, just see a lot of spoilers and wings that have absolutely no thought or track tuning put into them. Testing and tuning and absolutely knowing that it is effective is the only way to do it.
Old 03-21-2016, 09:21 PM
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Name:  A6BBA848-8CAD-4AAE-ACFF-D62195CC8143.jpg
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Snapped a pic for you.
Old 03-21-2016, 10:46 PM
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Legit. Did you make that yourself, or is that a pre-fabricated unit? Good looking piece, for sure.
Old 03-21-2016, 11:17 PM
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No sir, that's an Alan Blaine piece. He does amazing work.

http://www.blainefabrication.com
Old 03-22-2016, 03:33 PM
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Originally Posted by Steve91T
No sir, that's an Alan Blaine piece. He does amazing work.

http://www.blainefabrication.com
YES, he is an f body/y body road race MAGICIAN, and a well deserved of the title HERO over on frrax.com.

He does NOTHING 'ricey', and is ONLY into fully functional, full (road) race parts/prep!

IF I ever come into loads of coin, I WILL ship my car clean across this country (bypassing MANY reputable road race prep shops along the way) to have him prep it for NASA American Iron/American Iron X class racing.

Last edited by dailydriver; 03-23-2016 at 02:16 PM.
Old 03-22-2016, 04:04 PM
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It looks like a freaking work of art, especially knowing it is fully functional. Thanks for the picture and the link.

All that being said, are we any closer to figuring out which engine you're getting? I know I originally said to build a 5.3L, and personally, I still would. But you have one stop shopping for the LS1, and its displacement advantage does provide extra torques, which is always welcome. I think you can talk yourself out of buying either one pretty easily, so you should probably just buy the LS1 and go for it. That way you have something to work on, and can get it going as soon as possible. Drive it, test it, and change what you need to change from there.
Old 03-22-2016, 09:09 PM
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Originally Posted by DavidBoren
It looks like a freaking work of art, especially knowing it is fully functional. Thanks for the picture and the link.

All that being said, are we any closer to figuring out which engine you're getting? I know I originally said to build a 5.3L, and personally, I still would. But you have one stop shopping for the LS1, and its displacement advantage does provide extra torques, which is always welcome. I think you can talk yourself out of buying either one pretty easily, so you should probably just buy the LS1 and go for it. That way you have something to work on, and can get it going as soon as possible. Drive it, test it, and change what you need to change from there.
Yes sir, I'm going with the one stop shopping convince of the ls1. I'm going to use the stock 01 or 02 Fbody exhaust manifolds and put in some sort of very mild cam. I think it needs to be a little more aggressive than an ls6 cam, but not much. If anyone has a guess as to which cam specs would be ideal, I'd love to hear them n
Old 03-23-2016, 11:26 AM
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Call Martin Smallwood. Guaranteed he can set you up with the cam specs that would be ideal.
Old 03-23-2016, 01:07 PM
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Any reason why you can't or aren't going to run long tube headers?
Old 03-23-2016, 01:38 PM
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Originally Posted by Martin Smallwood
Any reason why you can't or aren't going to run long tube headers?
No. I just figured they aren't necessary for my power goals. The ls1 I'm going to get comes with stock manifolds and I've read that they 01-02 manifolds actually flow pretty well. So I figured I'd save the money on LT's and put it towards a cam that will put me at the power I need, which is 350 rwhp or so. Plus I won't have any ground clearance issues.

Seems the cost is going to be about a wash. LT's with an LS6 cam or stock manifolds with a mild cam. Then I figured if I want more power in the future, all I'd have to do is add LT's and retune it.

Your thoughts?


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