My first ls build
Thread Starter
Teching In
Joined: Aug 2013
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From: Lawson, Mo
My first ls build OK guys as it says this is my first ls build and I was hoping to get some opinions on whether what im planning on doing is a good idea or not.
Right now I have an aluminum ls1 block, heads, and bottom end, also an ls6 intake, injectors, rails and throttle body. My idea for it
Bottom end
Eagle specialty products rotating assembly. PN-ESP-12804 on summit racing
Heads
Port and polish
2.02 intake
1.55 exhaust
Crane dual spring valve springs
rocker arms ?
Cam
Lingenfelter GT9
That's about all I got so far. Any suggestions would be nice. thanks ahead of time.
Right now I have an aluminum ls1 block, heads, and bottom end, also an ls6 intake, injectors, rails and throttle body. My idea for it
Bottom end
Eagle specialty products rotating assembly. PN-ESP-12804 on summit racing
Heads
Port and polish
2.02 intake
1.55 exhaust
Crane dual spring valve springs
rocker arms ?
Cam
Lingenfelter GT9
That's about all I got so far. Any suggestions would be nice. thanks ahead of time.
Thread Starter
Teching In
Joined: Aug 2013
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From: Lawson, Mo
Ok thanks, I want this to be a good street motor and was planning to run about a 10.50:1 compression ratio. With keeping it on a fairly decent budget I would like to hit the 600+ hp range at the flywheel. I need a new PCM and wiring harness I know painless wiring has a kit. Does anyone else know of a place to get one?
Ok thanks, I want this to be a good street motor and was planning to run about a 10.50:1 compression ratio. With keeping it on a fairly decent budget I would like to hit the 600+ hp range at the flywheel. I need a new PCM and wiring harness I know painless wiring has a kit. Does anyone else know of a place to get one?
So your porting the stock 853/241 castings I suppose?
Thread Starter
Teching In
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From: Lawson, Mo
Yes they are the stock 241 heads. Its going in a 88 firebird. I have no problem getting a new set of heads but I'm trying to spend my money on different parts of the car like suspension and things like that, if it would get me a lot closer to my wanted mark I will take suggestions.
Launching!
Joined: May 2011
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From: Honey Brook, Pa.
To hit that 600hp mark that will have to be one serious LS1 especially NA!! An easier route might be to do a boost friendly cam and a procharger (D1sc). Stay conservative on the boost and tune and you should be there on the stock bottom end. Just an alternative! Good Luck with the build!
Thread Starter
Teching In
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From: Lawson, Mo
Thanks. The bottom end I was going with is a forged rotating kit from Eagle, with a 4" stroke. I have the part listed on my first post. The stuff I listed is just some idea I've come up with, I really only have a basic idea of what I'm doing. I'm open to suggestions to get to the 600 mark without getting to wild.
Last edited by 88formulafirebird; Oct 19, 2013 at 06:17 PM.
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Launching!
Joined: May 2011
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From: Honey Brook, Pa.
600 at the flywheel will be about 520-530 at the rear wheels depending on driveline loss. You'll have to have an optimized 383 to do that which equals $$. My referance was to go mild FI on the stock bottom end and yes I did read the first post. It comes down to the budget, FI may be cheaper if you stay with a mild set-up. Oh, a friend has a 02 SS M6 with headers, a boost cam and a D1sc and dynoed over 600rwhp at 9psi.
That's why I mentioned the FI route! Good Luck with the build!
That's why I mentioned the FI route! Good Luck with the build!
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Thread Starter
Teching In
Joined: Aug 2013
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From: Lawson, Mo
600 at the flywheel will be about 520-530 at the rear wheels depending on driveline loss. You'll have to have an optimized 383 to do that which equals $$. My referance was to go mild FI on the stock bottom end and yes I did read the first post. It comes down to the budget, FI may be cheaper if you stay with a mild set-up. Oh, a friend has a 02 SS M6 with headers, a boost cam and a D1sc and dynoed over 600rwhp at 9psi.
That's why I mentioned the FI route! Good Luck with the build!
That's why I mentioned the FI route! Good Luck with the build!
Last edited by 88formulafirebird; Oct 19, 2013 at 09:16 PM.
Turbo/supercharger are not that expensive by themselves. It's all the supporting mods that add up, especially when you want to up the boost which everyone does..
Read all the FI stickies and know what your getting into, my build is approaching 2 years lol..
That isn't uncommon for a turbo build to take 1-2 years.. It's all the hidden fees
Rule of thumb is make a list of all the parts needed to do a FI build and then double it.. That's the real cost
Thread Starter
Teching In
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From: Lawson, Mo
The rotating assembly is getting replaced that is the one definite I do have. I want to keep the motor running on 91 octane and from what I've read an 11:1 compression ratio is about the max for 91, I may be wrong.
Do you have the stroker kit? It wont buy you much. It'll allow more cam to be used without issue, but it's really just a 346 in terms of power potential with an added 30ft-lbs of torque across the powerband.
And compression is dependent upon the camshaft IVC + static compression. So you could run 12.5:1 on 91 if your cam is big enough to make you hate life.
And compression is dependent upon the camshaft IVC + static compression. So you could run 12.5:1 on 91 if your cam is big enough to make you hate life.
Thread Starter
Teching In
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From: Lawson, Mo
I haven't started buying anything other than what I listed in my first post. I'm just trying to get a plan started so I can start buying parts and not order crap I don't end up using. I'm wide open to suggestion like I've said you all know more about this than I do.
TECH Senior Member
Joined: Feb 2009
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Texas Speed mite have better prices then summit .check out prices for a 383-408 ci long block from some vendors here.if you are set on using your current block for a 383 ,that will be good.but consider building a 402+ using a ls2 ,or a 6.0 iron block.
IIRC Tony Mamo's 383 that was in his Vette made 530 rwhp which would be
roughly 600 flywheel but does represent the top rung on the ladder of perfect
built/tuned combos. The Op needs to read/learn/listen and either go forced
induction or pony up some cash for a 600hp NA combo. 9 grand might come
close on the engine but certainly not on all the supporting mods to the car.
roughly 600 flywheel but does represent the top rung on the ladder of perfect
built/tuned combos. The Op needs to read/learn/listen and either go forced
induction or pony up some cash for a 600hp NA combo. 9 grand might come
close on the engine but certainly not on all the supporting mods to the car.