mild all motor setup

[knuckk]

Originally Posted by kommon_sense

higher cr n/a or boost will require premium gas. Its an extra $1-2 per fill-up, so don't see why there would be a concern with having to run premium.

true you do have a point thanks!

[9400rpms]

Originally Posted by knuckk

thats one reason why i didn't wanna go N/A because of the gas i'm not trying to go past 12:1 for my compression i want to be able to pump 89 gas or 87 gas when i need too so if i used high compression pistons i might as well get CTR pistons and a ls block i don't necessarily need to get a itr block

you might as well stay away from trying to make power with a honda if you only plan on running regular gas. you people sicken me when you say shit like that.

[MQTGSR]

Just about any high performance motor, weather it be boosted or N/A is going to require premium gas. If you do a mild build where you do bolt ons and some cams, you can still use reg. gas. However, if you want any serious power from N/A your going to need to raise compression, and same with boost, boost you always need premium.

As stated, premium is not that much more expensive. Specifically if your spending thousands on a build, why not just spend a few more dollars every time you fill your tank??

[knuckk]

ok lets say i went N/A with just some CTR pistons b16 head p&p skunk 2 valve train and CTR cams would i be able to use 89 or would that hurt the motor?

[Sirfallsalot243]

Originally Posted by knuckk

ok lets say i went N/A with just some CTR pistons b16 head p&p skunk 2 valve train and CTR cams would i be able to use 89 or would that hurt the motor?

CTR pistons will give you a compression ratio of about 13:1. Youll barely even be able to use 93. Youll need a really good tune to keep it off of race gas.

[MQTGSR]

Originally Posted by knuckk

ok lets say i went N/A with just some CTR pistons b16 head p&p skunk 2 valve train and CTR cams would i be able to use 89 or would that hurt the motor?

DO NOT USE ANYTHING LESS THAN PREMIUM WITH A HIGH COMPRESSION ENGINE!!

You'll cause pre-ignition and knocking, which can cause engine damage. You may not notice it, and your ECU may be smart enough to compinsate for your mistake, but I would not rely on it.

It was said about 30 times in this thread alone. If you have high compression engine, (which pistons from a CTR will give you) your going to need to use 92-93 octane. Any B series vtec motor is going to require 93 octane.

If you use lower compression pistons in a vtec B series you will not be making near as much as you should.

Why is it that big a deal to use 93 octane? It's seriously only a few bucks more a tank!

What I am telling you was said to you numerous times throughout this thread, just read what others had to say, I just summarized it, again for you.

[knuckk]

its not a big deal im just making sure before i go N/A i want to know what i can and cant do i understand now tho thanks for the info

[kommon_sense]

Keep in mind that the rule of thumb is that you get about a 2% power increase for each point of compression. So based on that rule, if you were making 200hp @11:1, then 12:1 would put you at 204hp. IMO, the gains are not worth the extra tuning effort required. I'd suggest 11-11.5:1 . High CR, but still tame enough that you shouldn't have any issues with pump gas on the street.

[knuckk]

Originally Posted by kommon_sense

Keep in mind that the rule of thumb is that you get about a 2% power increase for each point of compression. So based on that rule, if you were making 200hp @11:1, then 12:1 would put you at 204hp. IMO, the gains are not worth the extra tuning effort required. I'd suggest 11-11.5:1 . High CR, but still tame enough that you shouldn't have any issues with pump gas on the street.

oo i see how it works now thanks!

[MQTGSR]

Originally Posted by kommon_sense

Keep in mind that the rule of thumb is that you get about a 2% power increase for each point of compression. So based on that rule, if you were making 200hp @11:1, then 12:1 would put you at 204hp. IMO, the gains are not worth the extra tuning effort required. I'd suggest 11-11.5:1 . High CR, but still tame enough that you shouldn't have any issues with pump gas on the street.

Werd, this man speaks the truth.

What is the limit for 93 octane, like 12.5:1 comp. ratio?

[9400rpms]

Originally Posted by MQTGSR

Werd, this man speaks the truth.

What is the limit for 93 octane, like 12.5:1 comp. ratio?

12.8 daily driven. is pushing the limits..
12.5 is pushing it too, you wanna stick to 12.1 and under on pump gas, incase u hit a lean spot you wont melt your piston or plug RIGHT away..
i'm 11.8~12.1 CR runs fine for me, <3 shell v-powa.

[MQTGSR]

I'm suppost to be 10:1 but IDK exactly in how good a shape my rings are, i should do a good compression test one of these days. I think my compressions fine, because the car runs fine, and does not burn off that much oil, maybe a quart every month and a half or so, but thats prob. because I hit teh mad vtack a lot

[Skunk2R]

u can use .... Prelude vtec injectors...which are 315cc...walbro fuel pump...aem or like this fuel regulator...and TB ITR or skunk2 68mm. All of these parts benefits to make a better program.

also u can use CTR pistons..for more CR..
JG engine Dynamics Tri-Y header is the best..
Trust exhaust system is good..62mm.. or Apexi.. get one of Japanese...

[Skunk2R]

TB 68mm Skunk2 or ITR 65mm
315cc Prelude injectors ...Or RC
Walbro Fuel Pump..
Aem fuel regulator...
---- benefits to make better program...means more Power

u can use CTR pistons for more CR.
JG engine dynamics Tri*Y header is the best
Trust exhaust system 62mm... or apexi ....get one japanese..

[quicksweepEX]

What about 9:1 compresion for a all motor setup is that to low of compresion, my block is sleeved with JE pistons and eagle h-beams and its boosted now but i sold the turbo kit to build a all motor setup, Do I need higher compresion to do that?