How long do you think my engine will last?
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
I've never run a procharger so please take my input with a grain of salt but when I looked at the SBE reliability sticky on this forum it kinda looks like procharger equipped cars tend to blow up at lower power levels then say a turbo car.
I ran my SBE LS1 at 700ish whp for almost five years on rams **** pump 93, sold the car and the new owner is still enjoying it.
There may be nothing to it but again, seems like procharger cars are harder on parts then a turbo car.
Just my $.02.
I ran my SBE LS1 at 700ish whp for almost five years on rams **** pump 93, sold the car and the new owner is still enjoying it.
There may be nothing to it but again, seems like procharger cars are harder on parts then a turbo car.
Just my $.02.
Although in order to make say 700hp at the wheels, the blower engine would need to make more power in the first place, as some gets eaten up driving the blower.
That's a interesting observation but likely just a coincidence. Looking at the SBE reliability list on ls1gto which also covers ls2's, It doesn't look as bad. SBE LINK
With a procharger, you only enter boost at wot and you hit peak boost at the end of the rpm range. From what I've heard, Running the same boost at lower rpms vs higher rpms is more risky. Also, I imagine the IAT's to be lower with a procharger vs a turbo. Plus, a procharger is more predictable than a turbo and you don't have to worry about boost spikes.
With a procharger, you only enter boost at wot and you hit peak boost at the end of the rpm range. From what I've heard, Running the same boost at lower rpms vs higher rpms is more risky. Also, I imagine the IAT's to be lower with a procharger vs a turbo. Plus, a procharger is more predictable than a turbo and you don't have to worry about boost spikes.
My buddy that builds ls engines for a living told me that from what hes seen, the ls1 and ls2 seem to live just fine below 12 psi for a while given the tune not being too lean or too much timing. He told me when i get to 12 psi, it was a gamble and a matter of time. And he was 100% correct. I was running my afr at 11.5 and leaned it to 11.8 (93 pump) and it lasted a couple passes at the track and broke the top ring land on #7 piston. You running e85 so I cant help much there.
My buddy that builds ls engines for a living told me that from what hes seen, the ls1 and ls2 seem to live just fine below 12 psi for a while given the tune not being too lean or too much timing. He told me when i get to 12 psi, it was a gamble and a matter of time. And he was 100% correct. I was running my afr at 11.5 and leaned it to 11.8 (93 pump) and it lasted a couple passes at the track and broke the top ring land on #7 piston. You running e85 so I cant help much there.
That's a interesting observation but likely just a coincidence. Looking at the SBE reliability list on ls1gto which also covers ls2's, It doesn't look as bad. SBE LINK
With a procharger, you only enter boost at wot and you hit peak boost at the end of the rpm range. From what I've heard, Running the same boost at lower rpms vs higher rpms is more risky. Also, I imagine the IAT's to be lower with a procharger vs a turbo. Plus, a procharger is more predictable than a turbo and you don't have to worry about boost spikes.
With a procharger, you only enter boost at wot and you hit peak boost at the end of the rpm range. From what I've heard, Running the same boost at lower rpms vs higher rpms is more risky. Also, I imagine the IAT's to be lower with a procharger vs a turbo. Plus, a procharger is more predictable than a turbo and you don't have to worry about boost spikes.
My thought was the torsional load on the crank plays a role and possibly the linear rise in boost pressure by rpm where as a turbo is more in tune with what the engine is needing.
Just shooting from the hip and guessing.
Procharger is definitely harder on the crank and possibly bearings, but also easier on drivetrain. Procharger also has lower iat, but with e85 or meth that may not matter. At high levels of drag racing the procharger cars seem to require less maintenance than the nitrous, roots, and turbo cars although that probably isn’t relevant here.
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