Just looking for some opinions. I have a 95 b18C1 I'm rebuilding and have new usdm itr pistons on oem rods. I currently have 98 itr cams. I also have a set of eagle rods collecting dust and was considering supertech 12.2 comp pistons.(they will allow me to keep aclose p2w) Will 12.2 be to high for pump gas? Will the oem cams work well with a Higher comp or would I be wasting my money .

 

12.2 is still ok for 91 but 93/94 would be best however. When you start going over 12.5.1 you might want to look for a new "DD"

 

I live in chicago, I can get 93. Just worried about pinging. Or if the itr cams will even respond to the comp increase? Looking for 195-200whp.

 

You'll be ok with the 12.1 on a DD Chicago isn't to high. You could get Skunk2 tuner 3's maybe pro 1's ?(you'll need to degree the pro 1's 100%) wouldn't hurt to do the same on the tuner 3's should you run those. assuming you've got all basic bolt ons you'll hit you'r mark

 

bit the bullet and got the supertechs, they are actually 11.9:1 on c1 heads. I'm sticking with the itr cams for now. this entire build has been from lurking on ebay for months waiting for deals. ill get cams when the time comes lol. anybody know what p2w I should run? they advertise .0038 heard they slap at that setting


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If your worried, talked to Mikey at pro function he will set you in the right direction

 

you can go higher than that once you get big cams. I ran 13.0 daily for a year. 7k miles on e85. I have a fill station 2 miles from my house. I bet you live next to one of these stations

http://www.e85locator.net/State%20Pa...s.html#Chicago

 

im running 12:5.1 in a c1 with tuner 2 on 93 it made 193 whp wit ha stock gsr throttle body and hack welded dnr header i have since changed to a 68mm throttle body and toda rep header and longer 3 inch intake tubing hoping to hit 200 whp mark

 

is there anybody making 200 whp on the stock cams? or are they the choke point on most builds? i have good supporting mods. this is just a side project with parts that i have lying around so i would hate to shell out 500$ just for 10 whp.

 

I think you would be hard pressed to find a build like this making 200whp with stock cams. I am not saying it is impossible, but it is very unlikely and I have yet to see one.

ITR cams should respond to higher compression, but the question is how much. Just make sure you get a good tune and you should see fairly decent numbers and reliability.

 

i agree with this. on a larger bore build id say you can hit 200whp with itr cams, but i wouldnt be surprised to see you wind up around 190 give or take. dont get too caught up in the numbers though, with itr cams and higher compression i think you will have a great power curve with a long powerband, not something peaky in the last 1500 rpms where your power shoots up just in time for redline.

im planning a similar build, about 12:1 and i want to use itr cams for that very reason. i know they will respond well to a lower vtec somewhere in the mid 4000 rpms, giving a nice wide powerband

 

that's what I like to hear! its a dd, I won't spend much time up at 8k


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Remove my powersteering belt and I'm there with ease. **** if my brakes weren't so heavy or my wheel/tire setup for that matter I'm sure with PS I'd be higher than 200WHP. If I can do it with 11.1:1 you can definitely do it with 12:1. Stock cams seem to choke out carrying torque more than anything though, and you can get away with higher static compression ratio with bigger cams to change the dynamic compression ratio.

 

I am very close with my GSR with ITR cams. Compression is 11.6:1. It is very hard to get 200whp. I don't have an offical dyno only street tuned it should be around 195ish. The fuel changes reflect this.

There are a few other 200whp with ITR cams that I can think of.
No AC and PS with 12:1 comp. Has made it.
Another one I know of had the transmission redone, lower friction bearings and NO AC and PS made it.

 

Are you sure? Years ago when I went to the Battle of the Imports I still had to add octane booster. Maybe it was just bad gas.

 

not really sure what ur asking I'm sure about? if I can run the motor on 93? because that was one of my original questions lol. anyone know if the s2 springs will work on a rsx chromoly retainer? I tried the b series retainer today and the inner spring has to much slop. its a larger diameter than the oem b series


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I'd like to know what your mods are.

 

The subaru brz has a compression ratio of 12:1 and run fine on 91 in california but that's the limit really. you'd be fine with 93/94 on 12:1

 

I have flat face valves. debating if ill use them or just keep the stock valves


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Keep stock, your head will flow better,

and the BRZ pretty sure has direct injection (along with port so well both) that is how it can have 12.5-1 and run on 91 pump gas, the design on these motors are over 20 years old, the BRZ has a modern engine so things are kinda of different.

 

direct injection makes a difference. im sure they run an uber-active knock sensor as well.

i "think" the rsx retainers dont need to be as tight as a ti retainer because they will not wear down in the same fashion? what i do know is that there are a fair amount of people using the rsx retainers a the moment with respectable rev limits with no adverse effects. i even picked up a set for myself

 

I'm not running ti. I see no reason at the moment. I am hoping the retainers fit and skunk didn't make there own profile so that u would be forced to use their retainers


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anybody using k retainers on skunk springs?


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