Compression too high??
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Compression too high??
I want to boost my ls/vtec.
B18B1 bottom
B16 head
JDM ITR pistons
ARP rod bolts/ head studs
ACL Clevite race bearings...
My compression is 10:8:1, kinda high for boost. Im lookiong for 250-300hp for my daily driver. I heard that it would be fine if I had a good tune. Any input would be nice.
B18B1 bottom
B16 head
JDM ITR pistons
ARP rod bolts/ head studs
ACL Clevite race bearings...
My compression is 10:8:1, kinda high for boost. Im lookiong for 250-300hp for my daily driver. I heard that it would be fine if I had a good tune. Any input would be nice.
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Re: Compression too high??
I have seen higher, thats not too hateful. It's all in the tune man. Depending on your fuel setup, and the tuner. If your tuner is that good it should happen, but your gonna hate life if you have to run 110 or higher for gas, for a daily.
#3
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Re: Compression too high??
depending on your cams i bet you can get 250 on pump gas with like 6-8psi of boost from some type of t3t4. just make sure it is tuned well and because my guess would be with that compression and cast pistons it wont take to much detonation if any.
#5
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Re: Compression too high??
My last turbo build was 11.5:1 compression and I ran 9 lbs safely on 93 pump gas, even though I have E85 readily available. It can easily be done and safely just get a proper tune.
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Re: Compression too high??
9 lbs doesn't mean anything if the car was barely cracking 200 WHP. Tell us how much power and torque you've made on 93 oct and 11.5:1 CR instead.
I can run 20 PSI on 12.0:1 CR if I wanted to... All I need is run 2 deg BTDC and make 190 WHP at 20 PSI.
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Re: Compression too high??
well a tune would definitly be helpfull. Trying to get my hands on Hondata S200. 250hp on 6-8lbs would be nice or around 220 all motor also. The ls/vtec is running strong but i need more power. I heard that my setup is supposed to be making around 200hp. I doubt it, but it can run right next to stock SRT-4's. Pretty Descent for a mild build.
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Re: Compression too high??
Like Tony said, you can tune the thing and make it work, but how good and how long. If you still have cast pistons, your asking for it. I would just stay n/a with a good head/cam setup, or maybe a small shot. You COULD probally make decent power as long as your prepared to run 110 or higher octane in your DAILY. That would suck!!! You would be better off putting the stock ls pistons back in, or even better some cp's or something.
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Re: Compression too high??
yeah thats the only downside is trying to stay on the pump.lol I mean dont people turbo stock Type R's? I was just thinking if they can do it then I can too. Not always work out that way though. I guess that Id still be pretty quick with 200-220 all motor. Good head build, cams, valvetrain, etc...
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Re: Compression too high??
You would just have to get with a tuner, and get hooked up and see what he says. E85 an option? You would be fine with that. I'm sure you could turbo the thing but on 93, you would be on low boost. Good head/cam combo and the car will run good on top end with good tuning. If your that concerned with boost, put the stock pistons back in or go get a junk yard ls block and boost that. I would spend the money and put some pistons in it, but thats me.......
#12
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Re: Compression too high??
Somebody's ***** hurts really bad. You should go see the gynecologist for that... There are no dyno's where I live otherwise I would have posted that, kid. I could run 100 psi if I wanted to too, don't mean that the motor will last. What’s next? Comparing dick sizes over the internet?
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Re: Compression too high??
Somebody's ***** hurts really bad. You should go see the gynecologist for that... There are no dyno's where I live otherwise I would have posted that, kid. I could run 100 psi if I wanted to too, don't mean that the motor will last. What’s next? Comparing dick sizes over the internet?
You are so lost.. It would help if you don't even speak at all.
PSI is simply the restriction between your turbo and the motor. Ignition timing directly determines the VE and efficiency of the motor, therefore, if I run 15 PSI with 5 deg BTDC on a standard T3/T4, your effective torque and HP production is no different than some dude running 8 PSI of boost at 20 deg BTDC.
Get it?
If you want, you may want to search some more threads about high compression turbo on this forum. I probably dominate 90% of the threads you end up searching...LOL I had so many high CR setups it's not even funny. My last setup was a 10.5:1 CR GT2871R w/ ITB setup with 420 WHP on 94 oct and had over 50k miles on it . My setup before that was an 11.5:1 CR with a GT28RS with 51mm ITB's with 320 WHP and 12 PSI of boost.
Boost means sh*t, and learn to cope with it. It doesn't make you look smarter if you can run 18 PSI on 11.5:1 CR but barely crack 250 WHP/200 TQ.
Street tuning is known for that, either blindingly give too much timing, or dumb it down so much that the engine literally becomes a retard with the turbo wheezing, air wooshing but no sh*t gets done and no power is made. If you don't have the right tools to do the job, then don't do it. You ain't removing a nut and bolt with your fingers if you didn't had a wrench. Same thing here, if you don't have access to a dyno and want to play with boost and high compression, don't bother unless you like carnage.
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Re: Compression too high??
HAHAHA.... Here we go again, another internet battle. Where the hell did that **** come from? He was just stating that psi isn't what you tune for, shoot for a # and you'll find out if you can do it or not. Bottom line is EVERYONE, meaning tuners, are different. For example, the guy who tunes my car is so good @ tuning, when you take the car to the dyno after street tuning, he can't make anymore power on the dyno. He's just been doin it soooo long, he's got it down. I personally like street tuning, and data logging down the track. For some reason every time we go to the dyno and tune, the car doesn't like it on the street or the track.
Sounds like Tony has been around the block a couple times, so I would hear him out. Just decide what you wanna do and go do it. Your just gonna have to get up with your tuner and go from there.
Sounds like Tony has been around the block a couple times, so I would hear him out. Just decide what you wanna do and go do it. Your just gonna have to get up with your tuner and go from there.
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