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2011 Grand Sport M6
Summit 8715R1 baby cam 222/234 115+3, .600/.575
SW 1 7/8 headers to ORX
Factory 2.5" NPP axle back
Halltech 108
ATI 10% UD balancer
Stock heads/ intake/ pushrods/ rockers/ timing chain/ /oil pump/ headgaskets/ head bolts/ lifters with 51k miles (didn't pull heads off or drop the pan lol)
Cammotion beehive springs
new ACDelco wires, NGK TR55's
flex sensor
GM 54LB injectors
160 tstat
ACT dual disc clutch with lightweight flywheel
456/439 on terrible CA 91
482/462 on E85
Mediocre numbers on 91 but who cares. Superb numbers on E85 IMO for stock untouched heads. Oxygenated CA 91 is terrible and well over $6/ gallon here! Car will run E85 100% of the time and car feels really really strong. My goal for the build was silent valvetrain (hate tick tick ticky cars), and as flat as a torque curve as possible, and minimal cam chop, with perfect driveability. I dislike donkey dick cams that are peaky and romp romp at idle too much. Thanks to JEP Autoworks and BRC Raceworks!
So on stock heads, how are you getting that much benefit out of E85 (assuming those two curves are 91 and E85)? My understanding was that most of the benefit was the higher octane rating utilized with higher compression ratios or boosted setups? I understand you can probably advance the timing with E85, but if I'm reading the graph right and you're getting +30hp from E85, maybe I need to consider going that direction too.
Yes I do. I searched and searched for sound clips of NPP cars with catless headers because I wanted to know if I'd be able to drive the neighborhood without getting hate. With the valve closed it's very similar to a stock car with the valves closed. Definitely good enough to fly under the radar whenever I need to.
Thanks. Exactly what I was looking for. Doing full exhaust with npp. Wanted to hear that cam with valves closed. Are you happy with it? Looking for something that could possibly pass for stock but still run high 10’s.
Thanks. Exactly what I was looking for. Doing full exhaust with npp. Wanted to hear that cam with valves closed. Are you happy with it? Looking for something that could possibly pass for stock but still run high 10’s.
Yes definitely very happy with the cam and the overall result with E85. I could have dialed up the hassle factor considerably with ported/milled heads, and a bigger cam. But I need a really flat torque curve on this car for what I’m doing with it and so the baby cam achieved that. My tuner, highly regarded, advised against wasting time on milling or thinner head gaskets on 91. This cam has zero degrees of overlap so it drives very nice indeed. I might not have done the lightweight flywheel if I was doing it over again though.
Very nice gains! I been considering going e85 also, this helps me lean toward doing it. I’m also in Cali on crappy 91, so I might can get similar gains.
Very nice gains! I been considering going e85 also, this helps me lean toward doing it. I’m also in Cali on crappy 91, so I might can get similar gains.
Curious about this setup. Did it require any aftermarket computer or is the factory computer capable of running this? Can it run on any mix of 91 and e85?
I'm in Cali and tired of spending $6 for crappy gas. Would also be happy for a few more HP and a cooler engine at the track....
Curious about this setup. Did it require any aftermarket computer or is the factory computer capable of running this? Can it run on any mix of 91 and e85?
I'm in Cali and tired of spending $6 for crappy gas. Would also be happy for a few more HP and a cooler engine at the track....
You'll need to add a flex fuel sensor. $300, quite easy. Kits available from several venors specifically for the Corvette. And you'll need a full dyno tune as well.
Your results have convinced me to go with this same camshaft. I have an A6 with yank ss3600 converter and a rod mod LS3 intake.
thanks.
I wanted a rod mod intake but couldn’t get one in time, oh well. I might put a centri on this car in the future so the stock intake will be better for that anyways.
So on stock heads, how are you getting that much benefit out of E85 (assuming those two curves are 91 and E85)? My understanding was that most of the benefit was the higher octane rating utilized with higher compression ratios or boosted setups? I understand you can probably advance the timing with E85, but if I'm reading the graph right and you're getting +30hp from E85, maybe I need to consider going that direction too.
30+ HP sounds about right.
I have been doing a lot of reading about using E85, it has a lot of benefits.
The flame speed is greater for E85 so there is more expansion while the piston is on its way down from TDC which results in more power and this is without increasing timing.
E85 contains 30% more oxygen than gasoline so you get more oxygen in the cylinder for the same amount of air. Better burn, more power.
The latent heat of evaporation (how much heat is absorbed when the E85 evaporates) of E85 is 385 BTU/lb. Gasoline is 171 BTU/lb. This results in 40 to 50 degrees of cooling of the charge air which makes it more dense. More charge air for the same cylinder size results in more power. E85 likes to evaporate in the cylinder. Gasoline must be well atomized to change to vapor in time.
2011 Grand Sport M6
Summit 8715R1 baby cam 222/234 115+3, .600/.575
SW 1 7/8 headers to ORX
Factory 2.5" NPP axle back
Halltech 108
ATI 10% UD balancer
Stock heads/ intake/ pushrods/ rockers/ timing chain/ /oil pump/ headgaskets/ head bolts/ lifters with 51k miles (didn't pull heads off or drop the pan lol)
Cammotion beehive springs
new ACDelco wires, NGK TR55's
flex sensor
GM 54LB injectors
160 tstat
ACT dual disc clutch with lightweight flywheel
456/439 on terrible CA 91
482/462 on E85
Mediocre numbers on 91 but who cares. Superb numbers on E85 IMO for stock untouched heads. Oxygenated CA 91 is terrible and well over $6/ gallon here! Car will run E85 100% of the time and car feels really really strong. My goal for the build was silent valvetrain (hate tick tick ticky cars), and as flat as a torque curve as possible, and minimal cam chop, with perfect driveability. I dislike donkey dick cams that are peaky and romp romp at idle too much. Thanks to JEP Autoworks and BRC Raceworks!
Cam/ Header/ E85 Dyno Results!
