Ls2 + FI, what's ideal compression ratio.
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Ls2 + FI, what's ideal compression ratio. I posted this in a different section with not much luck. I'm thinking I may have posted in the wrong section. Hopefully you guys can help me out.
I have 2 LS2s that were pulled out of 2006 GTOs. I am putting in 2 1950 chevy pickups. The plan is to purchase the TrickFlow top end kit for the LS2. It shows that I'll be around 550hp. Also looking at a fast lsx 92mm intake. Stock 90mm throttle body and a magnuson tsv2300 supper charger. Only looking to run about 7-8 lbs of boost.
My question is this. I want to only run pump gas. 91-93 octane. Should I be changing my pistons to lower my compression? Goal is about 700hp+-.
I'm pretty set on these parts. Both of these trucks are identical trucks. . I do not want to run meth or super high octane. What i do not know is if it will be completely necessary to change out the pistons to lower the compression.
Any help on this would be appreciated.
I have 2 LS2s that were pulled out of 2006 GTOs. I am putting in 2 1950 chevy pickups. The plan is to purchase the TrickFlow top end kit for the LS2. It shows that I'll be around 550hp. Also looking at a fast lsx 92mm intake. Stock 90mm throttle body and a magnuson tsv2300 supper charger. Only looking to run about 7-8 lbs of boost.
My question is this. I want to only run pump gas. 91-93 octane. Should I be changing my pistons to lower my compression? Goal is about 700hp+-.
I'm pretty set on these parts. Both of these trucks are identical trucks. . I do not want to run meth or super high octane. What i do not know is if it will be completely necessary to change out the pistons to lower the compression.
Any help on this would be appreciated.
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Are you looking to use one of those silly remote mount magnuson setups? If you aren't then you don't need to worry about the fast intake. If you are, shame on you...
An otherwise stock LS2 isn't likely to live long at 700+hp uncorrected. Cheap, fast, reliable...
The heads are great but that cam really isn't in a boosted application. You could do just as well having the stock heads ported and using the LS9 cam or or something from a sponsor.
All just my opinion of course.
Edit: The compression isn't the biggest problem, but since you should fix it anyway I would shoot for about 10:1 at the power and boost levels you're talking about or you're willing to run corn. 9.5:1 if you think you'll turn it up higher and stay on pump.
An otherwise stock LS2 isn't likely to live long at 700+hp uncorrected. Cheap, fast, reliable...
The heads are great but that cam really isn't in a boosted application. You could do just as well having the stock heads ported and using the LS9 cam or or something from a sponsor.
All just my opinion of course.
Edit: The compression isn't the biggest problem, but since you should fix it anyway I would shoot for about 10:1 at the power and boost levels you're talking about or you're willing to run corn. 9.5:1 if you think you'll turn it up higher and stay on pump.
Last edited by eaglegoat; May 7, 2017 at 02:49 PM. Reason: Forgot to answer the question.
Crankshaft Target Wheel tooth count Hi, ONE GREAT help would be to KNOW if your chosen engine uses a 24xe OR a 58x Target Wheel ?
The CS may tell as Gray = 58x
The 2006 could have either if early/late.
Lance
The CS may tell as Gray = 58x
The 2006 could have either if early/late.
Lance
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I've never heard anyone refer to magnuson's setups as silly. I went to Sema and went to both of their booths. Manuson and TrickFlow. I explained to them what the goal is and this is what was recommended from them. However I just can't follow someone blindly. Hence the reason I'm asking question.
These will be as much show cars as they are DD. They are both built to auto cross. So I do want to stay with that root super charger look. Open to suggestions on that if I'm headed in the wrong direction I'm open to opinions.
These will be as much show cars as they are DD. They are both built to auto cross. So I do want to stay with that root super charger look. Open to suggestions on that if I'm headed in the wrong direction I'm open to opinions.
Are you looking to use one of those silly remote mount magnuson setups? If you aren't then you don't need to worry about the fast intake. If you are, shame on you...
An otherwise stock LS2 isn't likely to live long at 700+hp uncorrected. Cheap, fast, reliable...
The heads are great but that cam really isn't in a boosted application. You could do just as well having the stock heads ported and using the LS9 cam or or something from a sponsor.
All just my opinion of course.
Edit: The compression isn't the biggest problem, but since you should fix it anyway I would shoot for about 10:1 at the power and boost levels you're talking about or you're willing to run corn. 9.5:1 if you think you'll turn it up higher and stay on pump.
An otherwise stock LS2 isn't likely to live long at 700+hp uncorrected. Cheap, fast, reliable...
The heads are great but that cam really isn't in a boosted application. You could do just as well having the stock heads ported and using the LS9 cam or or something from a sponsor.
All just my opinion of course.
Edit: The compression isn't the biggest problem, but since you should fix it anyway I would shoot for about 10:1 at the power and boost levels you're talking about or you're willing to run corn. 9.5:1 if you think you'll turn it up higher and stay on pump.
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These were both pulled from 06 GTOs. Maybe I'm wrong about that.
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From: SV, AZ
That's has nothing to do with the compression and is completely wrong. No GTO came with a 58 tooth wheel.
Last edited by eaglegoat; May 7, 2017 at 04:51 PM. Reason: Spelling
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Ditch the intake, put a blower on it, Maggie, whipple. Etc. run a decent blower cam, springs.
You should be around 550-600 rwhp. No problem on pump gas. Look at some of the blower cams from Brian tooley racing.
Edit: for the money they want for a Maggie, I would get a whipple2.9. I have one on a 6.0 and I love it. The tuner kit was $5750
You should be around 550-600 rwhp. No problem on pump gas. Look at some of the blower cams from Brian tooley racing.
Edit: for the money they want for a Maggie, I would get a whipple2.9. I have one on a 6.0 and I love it. The tuner kit was $5750
Last edited by jimmyg; May 7, 2017 at 05:14 PM.
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Ditch the intake, put a blower on it, Maggie, whipple. Etc. run a decent blower cam, springs.
You should be around 550-600 rwhp. No problem on pump gas. Look at some of the blower cams from Brian tooley racing.
Edit: for the money they want for a Maggie, I would get a whipple2.9. I have one on a 6.0 and I love it. The tuner kit was $5750
You should be around 550-600 rwhp. No problem on pump gas. Look at some of the blower cams from Brian tooley racing.
Edit: for the money they want for a Maggie, I would get a whipple2.9. I have one on a 6.0 and I love it. The tuner kit was $5750
How much wine do you get out of that whipple? The reason I lean magnuson is because I heard it's quieter than the whipple? Maybe not though.
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From: SV, AZ
I've never heard anyone refer to magnuson's setups as silly. I went to Sema and went to both of their booths. Manuson and TrickFlow. I explained to them what the goal is and this is what was recommended from them. However I just can't follow someone blindly. Hence the reason I'm asking question.
These will be as much show cars as they are DD. They are both built to auto cross. So I do want to stay with that root super charger look. Open to suggestions on that if I'm headed in the wrong direction I'm open to opinions.
These will be as much show cars as they are DD. They are both built to auto cross. So I do want to stay with that root super charger look. Open to suggestions on that if I'm headed in the wrong direction I'm open to opinions.
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It's really quiet . I like the whine, and was kind of disappointed in how quiet it is. Twin screws are a lot more efficient than a roots blower. Another thing is the intake temps. The whipples run a lot cooler. My IATs are 20-25 over ambient.
Ignition Resolution Hi Burly, I agree with the 2006 GM report though when an engine is a "take out" it is better to be sure.
NOW for those who use science, the accuracy of a 58x (60-2) TW IS 1/4 degree at a 2500 RPM acceleration rate.
The 24 tooth resolution is TWO degrees at the same acceleration rate of 2500 RPM per second.
This effects the engine Knock Rating a GREAT amount.
The use of a 60-2 (GM 58x) is worth a 1/2 point static compression increase with the same/better Knock Rating.
I ask you, Burly, to inspect Wegner Motorsports TVS LS blower kit/design.
Lance
NOW for those who use science, the accuracy of a 58x (60-2) TW IS 1/4 degree at a 2500 RPM acceleration rate.
The 24 tooth resolution is TWO degrees at the same acceleration rate of 2500 RPM per second.
This effects the engine Knock Rating a GREAT amount.
The use of a 60-2 (GM 58x) is worth a 1/2 point static compression increase with the same/better Knock Rating.
I ask you, Burly, to inspect Wegner Motorsports TVS LS blower kit/design.
Lance
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Either way, it makes sense to change the pistons at least and if pump fuel is the goal, drop the CR a little. There will be negligible loss in performance, but huge gains in reliability/safety from doing so. Mid 9's should be a good compromise
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Strange ? as some Monaro's did...and they're effectively same vehicle ?
Either way, it makes sense to change the pistons at least and if pump fuel is the goal, drop the CR a little. There will be negligible loss in performance, but huge gains in reliability/safety from doing so. Mid 9's should be a good compromise
Either way, it makes sense to change the pistons at least and if pump fuel is the goal, drop the CR a little. There will be negligible loss in performance, but huge gains in reliability/safety from doing so. Mid 9's should be a good compromise
Originally Posted by Holden
The production of 58-tooth crankshaft position sensor timing and 58X computer controls were not implemented in the Holden Monaro or any Holden export vehicle until MY-07'. All Holden Monaro and export models utilized 24X controls until the end of their production cycle.
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Strange ? as some Monaro's did...and they're effectively same vehicle ?
Either way, it makes sense to change the pistons at least and if pump fuel is the goal, drop the CR a little. There will be negligible loss in performance, but huge gains in reliability/safety from doing so. Mid 9's should be a good compromise
Either way, it makes sense to change the pistons at least and if pump fuel is the goal, drop the CR a little. There will be negligible loss in performance, but huge gains in reliability/safety from doing so. Mid 9's should be a good compromise
9.5CR has kind of been my thought so far. I want this pickup to move but I'm not looking for the fastest vehicle out there. Reliability and low maintenance is the goal and pump gas to me is low maintenance. You think I should be good for 7-8 or maybe even 12-13#s if I get a wild hair someday?
Last edited by Burly; May 11, 2017 at 08:13 AM.