i have a gsr block crank and rods but instead of going with ITR pistion i want alittle more power so i was wanting CTR pistion with a B16a head it should be about 13.1 right

any want does any one have a similar setup. with the right cam with it be a good DD or to high compression for a dd

and im looking for a good set of cams not sure what but i was thanking about 1 of 3
buddy club3, skunk2 stage2 or pro1 or toda A im wanting something a little better in med rage then ITR/CTR but to have a real big vtec power gain

 

i have seen similar power with both pistons, no reason to choose one over the other, other than flame travels ITR gets my vote!

 

mmm but CTR piston in a gsr would be higher compress then a ITR piston in a gsr right that way it should be a little more power

sorry i dont know much about N/A but going turbo thats diff.

 

What gas are u planning to run?

 

E85

 

mmmm

 

13.1 can run on 93 with a good tune, as said the compression difference is minimal between ctr and itr

Go with pro1s for a daily

 

you ever done it?

 

Dont buy cheap gas and you will be fine.

 

and how do you know you got cheap gas until it could be too late running that kind of compression?

there is no point in using that kind of compression running 93 octane, e85 is fine with it. You'll have to tune it down on 93, whereas with lower compression you could take advantage of increased timing and make equal if not more power.

there is no sane professional that would recommend a car thats going to drive around on the street everyday to run 13:1 compression on 93. Can it be done? sure. Is it wise? no.

 

For 95% of the "street" motors out there that are looking for more power, simply adding compression is NOT gonna be your best, or your most efficient "mod." Why are people so F'in STUCK on compression??

What makes more sense:

1.) Run a **** load of compression and have to detune the motor to keep it from detonating or;
2.) Use a decent amount of compression(10:5 +) and take full advantage of being able to tune the motor to run @ it's peak performance?

Q16's post


"Cuz when you Peak, you win" LOL sorry I had to hahaha

 

No I do not do tuning myself, he could have it tuned for 93 to drive on the street, yes I understand the timing would have to be retarded but he could have another program for E85 when he takes it to the track or whereever he need it to be at its potential.

We usually do this in daily's with hi CR cause E85 is hard to find around here and CAM2 is too pricey

hi compression creates more power from a given amount a air/fuel mixture, higher compression also causes the air and fuel to mix better which increases power also.

I understand what you are sayin, basicly find a power goal, and stick to a decent reliable compression and use it to get to that goal.

Unfortunatly the majority of guys I see would rather go backwards and build a ridiculous CR block and build their head as they go

BEST bet for the op, IMO, would be go for about 11-11.5:1 CR get a nice set of cams and start looking into getting some work done on the head

 

you know that mid-high load, low RPM (acceleration from a stop/low speed....what you encounter the most during daily driving) is what is most prone for detonation? The engine is having to do the most 'work' there.

Its not about power really. Power goals wont help the fact that your running 13:1 on pump gas and walking the thin line of the octane limit.

regardless, he is not running 93 so running 13:1 is going to be fine.

i'd go with pro2's. You will make great power with 13:1 granted you have the intake and exhaust to let it breath.

 

I only said find a power goal cause some guys will build a block like its only gonna see the track then throw a stock head with some cams and call it a day, "stuck on compression" as clean rice said. if they just built a mild CR block and put more work into the head it would be better performing and more reliable, and you wouldn't have to pay out your azz for gas.


Honestly Im looking back at this thread he did say e85 and I think I may have posted that response to the wrong thread there is another I was lookin at asking how high a cr you can go on pump gas, sorry the snow has had me chillin in the 420 club for a few days

If E85 is available in your area its characteristics make it primo for a high CR setup, I wasn't trying to say 93 is better off I would avoid it myself