Looking for comments/critiques of build plan
Looking for comments/critiques of build plan Parts I have:
ls2 block
317 heads
4.8 58x crank
twin s257sx-e turbos
twin 38mm wastegates
plan is:
4.8 crank
ls2 block
compstar 6.300 rods
1.31 compression height +10cc piston 4.005 bore
ls7 lifters
stock rockers
.660 btr platinum spring kit
Btr hardened pushrods
custom turbo cam from cam motion.
Arp head and main studs
king bearings
triple pump setup (1 255lph and 2 450lph)
210lb injectors
questions:
This puts me just under 10:1 compression, planning to run e85. Is this too low? I am planning to run 20-25lbs of boost.
Will the ls7 lifters be ok at 7500-8000 rpm or should I go with a set of Morel or similar linkbar lifters?
Will stock 317 heads be a major handicap? Will a stock ls6 intake be a major handicap? Would a sheetmetal i take be worth it ( I assume itll kill power under like 4k)
Car will be a full weight 6 speed, would like to make 1000whp. Previous owner of turbos made 1140whp at 20.5lbs on a 370.
please let me know of any major concerns or suggestion, Thanks.
ls2 block
317 heads
4.8 58x crank
twin s257sx-e turbos
twin 38mm wastegates
plan is:
4.8 crank
ls2 block
compstar 6.300 rods
1.31 compression height +10cc piston 4.005 bore
ls7 lifters
stock rockers
.660 btr platinum spring kit
Btr hardened pushrods
custom turbo cam from cam motion.
Arp head and main studs
king bearings
triple pump setup (1 255lph and 2 450lph)
210lb injectors
questions:
This puts me just under 10:1 compression, planning to run e85. Is this too low? I am planning to run 20-25lbs of boost.
Will the ls7 lifters be ok at 7500-8000 rpm or should I go with a set of Morel or similar linkbar lifters?
Will stock 317 heads be a major handicap? Will a stock ls6 intake be a major handicap? Would a sheetmetal i take be worth it ( I assume itll kill power under like 4k)
Car will be a full weight 6 speed, would like to make 1000whp. Previous owner of turbos made 1140whp at 20.5lbs on a 370.
please let me know of any major concerns or suggestion, Thanks.
Thanks for the feedback.
I was looking at cam motions site, does anyone think there is a value going to a LLSR setup? It doesnt seem like it will be significantly more expensive than a hydraulic setup. I have heard that they are less intensive as far as shimming intervals compared to a more old school solud roller.
not worth it for a car that will be mostly street driven?
I was looking at cam motions site, does anyone think there is a value going to a LLSR setup? It doesnt seem like it will be significantly more expensive than a hydraulic setup. I have heard that they are less intensive as far as shimming intervals compared to a more old school solud roller.
not worth it for a car that will be mostly street driven?
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From: Norn Iron
My T56 lasted 10 years...and in the end I killed 5th gear ( on 2 boxes 2 weeks apart lol )
If not launching hard, then even a T56 is still a very strong box and if you have it already may as well use it. But a Magnum seems the best value upgrade.
If mostly street use...why downsize with the 4.8 crank ? Even more so when you almost indicate that you dont want to lose torque down low with a big intake ?
Oil squirters can be a good thing too.
If not launching hard, then even a T56 is still a very strong box and if you have it already may as well use it. But a Magnum seems the best value upgrade.
If mostly street use...why downsize with the 4.8 crank ? Even more so when you almost indicate that you dont want to lose torque down low with a big intake ?
Oil squirters can be a good thing too.
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The triple pump idea is ridiculous. The only reason to ever do that is when you incrementally keep making more power, and you need more fuel. As an idea for a new build, this is tripling your potential points of failure. Mathematically it is really far worse than that, but I'm being kind. Also, if you are only going to run E85, you may be better off trading the 317s for the higher compression versions (241 or 243, I don't remember) with someone who needs the lower comp heads for a gas motor.
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I wouldn't do 3 pumps. I would like to think that 2 450s would keep things fed, but I'm honestly not sure of the mathemtical equation to give a definitive answer. Sounds like you are looking to go all out with the build, so more compression wouldn't hurt....11:1 maybe? The thing to remember is, yes... it will run a bit harder.... But you are just that much closer to the ragged edge. Not much room for error.
The triple pump idea is ridiculous. The only reason to ever do that is when you incrementally keep making more power, and you need more fuel. As an idea for a new build, this is tripling your potential points of failure. Mathematically it is really far worse than that, but I'm being kind. Also, if you are only going to run E85, you may be better off trading the 317s for the higher compression versions (241 or 243, I don't remember) with someone who needs the lower comp heads for a gas motor.
Fair point on the heads, I just already have the 317s. Is there a downside to running the 317s vs 799 if same compression?
I wouldn't do 3 pumps. I would like to think that 2 450s would keep things fed, but I'm honestly not sure of the mathemtical equation to give a definitive answer. Sounds like you are looking to go all out with the build, so more compression wouldn't hurt....11:1 maybe? The thing to remember is, yes... it will run a bit harder.... But you are just that much closer to the ragged edge. Not much room for error.
9 Second Club
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From: Norn Iron
Really the world is your oyster with intakes....depending what will fit your budget and chassis.
For sub 6500rpm performance....stick with any OEM style of intake.
For say gains in the 6-7k+ range...then perhaps some of the bigger types of intake.
Or if you dont care either way and just want it to look cool...again, take your pick.
For sub 6500rpm performance....stick with any OEM style of intake.
For say gains in the 6-7k+ range...then perhaps some of the bigger types of intake.
Or if you dont care either way and just want it to look cool...again, take your pick.
Really the world is your oyster with intakes....depending what will fit your budget and chassis.
For sub 6500rpm performance....stick with any OEM style of intake.
For say gains in the 6-7k+ range...then perhaps some of the bigger types of intake.
Or if you dont care either way and just want it to look cool...again, take your pick.
For sub 6500rpm performance....stick with any OEM style of intake.
For say gains in the 6-7k+ range...then perhaps some of the bigger types of intake.
Or if you dont care either way and just want it to look cool...again, take your pick.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
https://ls1tech.com/forums/forced-in...ke-review.html
And noting my last few posts !! ( albeit will do an update now )
Last edited by stevieturbo; Jan 27, 2018 at 04:51 PM.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
And of course what many will refer back to when it comes to tests....
Is it all encompassing ? No, Is it real for every application ? maybe not
But still a damn good test...there seem to be so few like it !! Of course there are many other intakes out there too. Really none are diabolically bad, and for most part the OEM styles shine above most of the rest...except if you're heading beyond 6500, 7000rpm...then the bigger intakes start to shine. At least in this test.
Different engine, cam, head combo ?...who knows. I'm sure it'd follow similar patterns though
http://www.hotrod.com/articles/20-ls...ifolds-tested/
Is it all encompassing ? No, Is it real for every application ? maybe not
But still a damn good test...there seem to be so few like it !! Of course there are many other intakes out there too. Really none are diabolically bad, and for most part the OEM styles shine above most of the rest...except if you're heading beyond 6500, 7000rpm...then the bigger intakes start to shine. At least in this test.
Different engine, cam, head combo ?...who knows. I'm sure it'd follow similar patterns though
http://www.hotrod.com/articles/20-ls...ifolds-tested/
I recommend that you find one pump that will get you the fuel you need. I won't recommend a brand, because that is very speculative. If you wanted 3x more power than you are after, I would recommend an electric primer pump going to a belt fed pump. As for compression, 10/1 will leave you happy, but it will not max out an e85 ride. How close you want to get to maxing it out is your decision. Believe me when I tell you that the last 10% of power will cost you over 90% of the headaches. If this is a fun ride as opposed to any sort of class killing competition motor, then just bolt **** up and be happy. You can do a rolling burnout at freeway speeds with half the power of most of the guys in this FI forum.