10:1 cr on 92 oct???
Jan 9, 2011, 12:46 PM
#1
10:1 cr on 92 oct???
Hey guys,
I will be doing a 92oct tune I believe next week and was wondering if anyone has tuned a 10:1 motor on 92 with close to the same mods as me? Just trying to figure out where my boost will be. Thanks
Mikey
I will be doing a 92oct tune I believe next week and was wondering if anyone has tuned a 10:1 motor on 92 with close to the same mods as me? Just trying to figure out where my boost will be. Thanks
Mikey
Last edited by BLKCarbonEVO; Jan 9, 2011 at 01:16 PM.
Jan 9, 2011, 01:05 PM
#3
His setup is a 9:1 cr mine is a 10:1. Our cars are very similar, only difference is the piston cr and turbo. I won't get near him on 92 since I'm 10:1. Mikey
Last edited by BLKCarbonEVO; Jan 9, 2011 at 01:26 PM.
Jan 10, 2011, 07:28 AM
#7
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i got a 10.5cr 2.3. HTA86 on 93oct. got the boost at 22psi for now with 0* @ pk tq. and 13* at 7k. it could use more timing but i dont want to push it. virtual dyno shows 521/390. i want to get the boost up to 25psi for sure but im leaving the timing low. i dont trust this mexican BP i get gas from. it beats the murphy express though. LOL
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Jan 10, 2011, 01:28 PM
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the BP used to be the only station in town without ethanol. now their 10%. the Murphy express (wal-mart) has the worst gas in town by far. cheap yes, ethanol content is way up there. i loose 2mpg in my truck over BP.
BR claims he can run a 10.5:1 2.3 at 30+psi on 93. i aint gonna chance it. I DO know you CANNOT run 25psi on a 11.5:1 2.3! i tried at only 6* timing. lots of detonation ending in a melted piston.
BR claims he can run a 10.5:1 2.3 at 30+psi on 93. i aint gonna chance it. I DO know you CANNOT run 25psi on a 11.5:1 2.3! i tried at only 6* timing. lots of detonation ending in a melted piston.
Jan 10, 2011, 03:26 PM
#11
the BP used to be the only station in town without ethanol. now their 10%. the Murphy express (wal-mart) has the worst gas in town by far. cheap yes, ethanol content is way up there. i loose 2mpg in my truck over BP.
BR claims he can run a 10.5:1 2.3 at 30+psi on 93. i aint gonna chance it. I DO know you CANNOT run 25psi on a 11.5:1 2.3! i tried at only 6* timing. lots of detonation ending in a melted piston.
BR claims he can run a 10.5:1 2.3 at 30+psi on 93. i aint gonna chance it. I DO know you CANNOT run 25psi on a 11.5:1 2.3! i tried at only 6* timing. lots of detonation ending in a melted piston.
Mikey
Jan 10, 2011, 04:37 PM
#12
You can play with cam timing and drop peak torque pretty easily to keep peak cylinder pressures under control. Also, if you are using ECU controlled boost, you can minimize boost through the VE peak and then as VE starts to drop, start turning up the boost to get the peak HP way up.
Obviously you don't build a setup to be comprimised like that, but if you built the car for E85/racegas and then just want something to take around on crappy gas, detuning the cams and boost profile might be a good way to get where you want to be while still ending up with a fast car.
Obviously you don't build a setup to be comprimised like that, but if you built the car for E85/racegas and then just want something to take around on crappy gas, detuning the cams and boost profile might be a good way to get where you want to be while still ending up with a fast car.
Jan 10, 2011, 04:57 PM
#13
You can play with cam timing and drop peak torque pretty easily to keep peak cylinder pressures under control. Also, if you are using ECU controlled boost, you can minimize boost through the VE peak and then as VE starts to drop, start turning up the boost to get the peak HP way up.
Obviously you don't build a setup to be comprimised like that, but if you built the car for E85/racegas and then just want something to take around on crappy gas, detuning the cams and boost profile might be a good way to get where you want to be while still ending up with a fast car.
Obviously you don't build a setup to be comprimised like that, but if you built the car for E85/racegas and then just want something to take around on crappy gas, detuning the cams and boost profile might be a good way to get where you want to be while still ending up with a fast car.
Mikey
Jan 10, 2011, 05:33 PM
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my set up has spiked to 34psi and held to red line with no knock = on 93 oct. so I dont see why you couldnt get at least 30 psi, 28 to be safe. but shouldnt be to much diff. then 93.
Jan 10, 2011, 06:07 PM
#15
Its amazing the difference 92 to 93 makes though. To put it into perspective, 91 to 92 tuning can be as much as 5* of timing in spots and almost always 3* less. From what I have seen I would be completely surprised if 92 to 92 was any different. I have ran 32psi on 9:1 motors on 92 here without any meth or additives. I ran 30psi on my 10:1 2.2 but it became apparent it didnt really like it on the street (vs the dyno).
It would be interesting to know what timing you are running at 34psi on 93 and a 10:1 motor and if its AEM or stock computer. The other thing (minor detail) depending on pistons the compression of a 10:1 Wiseco or JE is actually 9.7:1 and can vary with HG thickness a little as well. I think Wiseco has actually taken to calling it just a 9.7:1 these days.
Aaron
It would be interesting to know what timing you are running at 34psi on 93 and a 10:1 motor and if its AEM or stock computer. The other thing (minor detail) depending on pistons the compression of a 10:1 Wiseco or JE is actually 9.7:1 and can vary with HG thickness a little as well. I think Wiseco has actually taken to calling it just a 9.7:1 these days.
Aaron