03-29-2019, 09:07 PM | #57 |
Drives: 2016 2SS Join Date: Nov 2011
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I beg to differ sir but you are not correct. It is 100% true. Perhaps you need to do some research and ask yourself, why are so many LT1 engines having piston issues...compression and or bad tune. FACT!
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03-29-2019, 09:26 PM | #58 |
Drives: 2018 Camaro 1SS 1LE Join Date: Sep 2018
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03-30-2019, 04:39 AM | #59 |
Drives: 2017 Camaro 1SS Join Date: Aug 2016
Location: NH
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Compression is not the problem at 10psi of boost. The main problem with adding a supercharger to the stock LT1 is not really the pistons themselves, but the fact that the ring gaps are sometimes extremely tight from the factory. When the ring gaps are too tight, the heat can make them butt together and THAT breaks the piston.
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03-30-2019, 07:13 AM | #60 |
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[QUOTE=JANNETTYRACING;10474972]Just finished another JRE Super Street Brawler package on 93 octane.
https://www.facebook.com/jannettyrac...1693976464327/[/QUOT
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03-30-2019, 08:00 AM | #61 | |
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03-30-2019, 11:04 AM | #62 | |
Drives: 2017 Camaro 1SS Join Date: Aug 2016
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04-01-2019, 09:46 AM | #63 |
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Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
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If you drop a piston what's another 2k down the line for a block and machine work(worst case) and you may get away with never needing the upgraded pistons.. Seems like a good gamble just make around 650 or 700 and roll the dice.
I been preaching this all along the zl1s are making more power with lower compression than the SS running the same LT4 fuel parts and the same blower.. Using the thicker Cometic head gaskets and Lt4 heads seems like the way to go.. Should get the compression to 10:1 granted you can make more power on higher compression but the need for more octane goes up so e85 and meth are needed. (and with known piston problems less compression seems smarter)
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04-02-2019, 07:27 AM | #64 | |
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If the ring gap is the limiting factor, fix it. But keep the compression. |
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04-03-2019, 06:40 PM | #65 |
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04-03-2019, 07:21 PM | #66 | |
Dyno Show Queen LOL
Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
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My car: zl1 Lt4 1.7L blower, ATI 9.2 balancer, CAI, and headers. Dynoed 659 rwhp Wifes car: SS LT1, 2300 blower, Aux DSX, LT4 injectors, headers and CAI.. We had our cars worked on at the same time in feb.. dynoed with in 2 hours of each other both manual 6, both same fuel system, same dyno, she has a better blower. (Moves more air and iats where better since I was over spinning mine) Lower compression wins when you can turn up the boost agreed.. Higher compression wins if you have a fuel system and octane. But in the LT Direct injection running on 93 lower seems better..the blowers can out perform the fuel sytem. Look at the Street Brawler by Jannety. 735 on a SS with cam and maggi2300, on zl1s it's in the 800s.
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04-03-2019, 08:24 PM | #67 | |
Drives: 2017 Camaro 2SS Nightfall Gray vert Join Date: Jan 2018
Location: Swansea, IL
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I was in the 715whp range at 8psi with the super street brawler package...was over 800whp with 14psi...I am in the process of dialing my SS back down because I think that the 700range is perfect on the street. . .but will definitely run the SS over 800whp at the track this summer (super street brawler package). I am also getting ready to get another super street brawler setup on my M7. Damn taxes seem to be slowing me down. I am really leaning toward forged drop in pistons on that setup too...
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04-03-2019, 09:09 PM | #68 |
Dyno Show Queen LOL
Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
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I'm saying you can make more power with lower compression with these LTs.. cuz you cant afford to fuel them yet correcly..ya some do and some go cheap using meth or mixing 93 and e85.. just do it right get the 5k fuel system.
Your ss made 700s w e85.. cam and whole shebang My z made 701 with just swapping to a 2650.. on 93 15 psi to your 8 but u needed octane to do that. I would bet the farm if you used the cometic head gaskets .77 thickness vs lt1/4's .40 something and LT4 heads lowering the compression almost a point and half you be 40 or 50 hp more. I could care less about psi or boost numbers I'm talking the end number from the octane limit. But ya 13.1 compression on c16 all time will make more power.. but good luck w that.
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04-03-2019, 11:06 PM | #69 |
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For reference - I am making over 700wheel on a bone stock LT1 (stock intake, TB, stock headers, stock cam) with a centrifugal at 9.5lbs of boost. LT4 HPFP, LT4 injectors, secondary cat delete, pump E85 with meth injection turning on at 6lbs of boost. The meth isn't needed to fuel it, but is being used for octane / temp control. I can run it on strait E85 but we would be in the 630-640 range.
The misconception I am seeing in this conversation is people are relating boost with cylinder pressure, which higher numbers doesn't mean higher combustion pressure. The type of fuel and timing figure into that. That being said - my tuner would have had no problem pushing my car into the 12lb area (and probably close to 800hp) on a stock LT1 had I had headers on the car. We were pulleyed for 14lbs with the stock manifolds and were making 745wheel at 5700rpm, but without the headers he was thinking the cylinder pressure was going to get us into DET issues. We may be going down that road mid-summer with headers and pulleys for 12lbs and try to hit 800hp on a stock LT1.
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04-03-2019, 11:34 PM | #70 | |
Drives: 2017 Camaro 2SS Nightfall Gray vert Join Date: Jan 2018
Location: Swansea, IL
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Fwiw - My tune can use either e85 or 93. I would have to go back and look, but I know that I could run either 93octane at 10 psi or e85 at 8psi and have almost identical power. I like e85 because it's cheaper and I like less boost for same power. I dont use alky injection or my 12psi setup would be in the 830whp range.
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