I have a 2650 on my stock 21 ZL1. No other mods. It came with a 90mm pulley and I see anywhere 14.5 to 15psi. Made 700rwhp on straight 93 only. I do run octanium from time to time but looking to do some small e blend like e20/30 we will see. But so far its been good.
I just got the same set up, always wonder if they did it right lol. From one shop to another. Asked my guy why he didn’t go with meth. Or e85. There telling me it blow the engine up. Who knows who’s right
Back in the day the golden rule on pump gas was 18psi (turbocharged cars usually admittedly) why is 17 dangerous on pump? Also lots of stock turbo cars these days running over 20psi on pump🤷🏻♂️
if you're talking smaller displacement DOHC engines, yes those can take more cylinder pressures on lower octane due to the higher efficiency of a 4 valve pent roof combustion chamber.
@@ApeMotorsports so to make sure I understand it comes down to having enough octane to keep knock in check and different platforms can get away with more cyl pressure with pump before knock becomes a problem
Yes. In my experience the LT4's at 10:1 compression start to get pretty knock sensitive on 93 octane above 13psi. You can run more boost than that, but you have to pull timing to keep the knock out of it. Any power increase with more boost is lost with pulling the timing back. Some tuners will desensitize the knock sensors and push them harder. I've seen plenty of this and it usually ends up with a hurt motor. We have several ZL1's in the queue for engine rebuilds that came from other shops. All were being pushed too hard on 93 octane. They'll survive it for a little while, but usually a few months of it they hurt a piston.
Let me guess ? Speed Inc Hack job? They did this build on my 2020 zl1 1le, first day I picked up my car it showed check engine with 6 codes, oil leak antifreeze leak, and so on. I picked the car in march and in April my brand new lt4 was blowing white smoke 💨, in between that time the car went back 5 times for one issue or another ( I didn’t even get to enjoy the car)Bottom line I did one good pull and catastrophic failure and this my second build on the lt4 platform because I sold my first zl1. Their tow truck driver was telling they were having a lot of problems with cars going back because of either their tuner, their builds, or both and he referred me to a more reputable shop. new shop said their tuner Jim was throwing too much timing at it, half their cheap brass rockers were torqued between 32 and 35lbs, cheap lifters on the market, hoses kinked, catch can wasn’t hooked up properly, rocker screw just sitting in between the springs FOR GOD’S SAKE, and instead of replacing the oil dipstick where it was leaking they glued it and it was still leaking all that time and so on and so on. Glad you got this customer situated
This is a 5th Gen. Camaro itsi not a 6th Gen.until the body and interior change but Chevy is discontinuing the Camaro so there will not be a 6th Gen. Camaro
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Matt, another great video 👍.
Definitely some of the best videos out there for LT content. Love the tuning and datalog reviews.
I have a 2650 on my stock 21 ZL1. No other mods. It came with a 90mm pulley and I see anywhere 14.5 to 15psi. Made 700rwhp on straight 93 only. I do run octanium from time to time but looking to do some small e blend like e20/30 we will see. But so far its been good.
Thank you so much!
I just got the same set up, always wonder if they did it right lol. From one shop to another. Asked my guy why he didn’t go with meth. Or e85. There telling me it blow the engine up. Who knows who’s right
Back in the day the golden rule on pump gas was 18psi (turbocharged cars usually admittedly) why is 17 dangerous on pump? Also lots of stock turbo cars these days running over 20psi on pump🤷🏻♂️
if you're talking smaller displacement DOHC engines, yes those can take more cylinder pressures on lower octane due to the higher efficiency of a 4 valve pent roof combustion chamber.
@@ApeMotorsports so to make sure I understand it comes down to having enough octane to keep knock in check and different platforms can get away with more cyl pressure with pump before knock becomes a problem
Yes. In my experience the LT4's at 10:1 compression start to get pretty knock sensitive on 93 octane above 13psi. You can run more boost than that, but you have to pull timing to keep the knock out of it. Any power increase with more boost is lost with pulling the timing back. Some tuners will desensitize the knock sensors and push them harder. I've seen plenty of this and it usually ends up with a hurt motor. We have several ZL1's in the queue for engine rebuilds that came from other shops. All were being pushed too hard on 93 octane. They'll survive it for a little while, but usually a few months of it they hurt a piston.
@@ApeMotorsports thanks for the thorough reply, I wish your shop was closer. Any shops in south FL you recommend?
Let me guess ? Speed Inc Hack job? They did this build on my 2020 zl1 1le, first day I picked up my car it showed check engine with 6 codes, oil leak antifreeze leak, and so on. I picked the car in march and in April my brand new lt4 was blowing white smoke 💨, in between that time the car went back 5 times for one issue or another ( I didn’t even get to enjoy the car)Bottom line I did one good pull and catastrophic failure and this my second build on the lt4 platform because I sold my first zl1. Their tow truck driver was telling they were having a lot of problems with cars going back because of either their tuner, their builds, or both and he referred me to a more reputable shop. new shop said their tuner Jim was throwing too much timing at it, half their cheap brass rockers were torqued between 32 and 35lbs, cheap lifters on the market, hoses kinked, catch can wasn’t hooked up properly, rocker screw just sitting in between the springs FOR GOD’S SAKE, and instead of replacing the oil dipstick where it was leaking they glued it and it was still leaking all that time and so on and so on. Glad you got this customer situated
This is a 5th Gen. Camaro itsi not a 6th Gen.until the body and interior change but Chevy is discontinuing the Camaro so there will not be a 6th Gen. Camaro
Stay away from your dads special brownies
@Jonathan Corey lol I can tell you are the special brownie