JDMspirit

In a B16 setup with:

Skunk2 Pro Intake MAnifold
B18C Head with OEM valves

Which compression ratio will be needed to extract the max power of a par Skunk2 Pro2 cams in a B16. Or a lighter lift cam will be enough to fill the 1600cc of air ? Thanks

KillaSIPP

Enlightened glad to see someone basing there build around the cam choice rather than the cam choice arond there build.

Combustion Contraption

Pro 2's on a 1.6 will make alot of power:

- at 9500-10k RPM
- with a VICTOR X style Manifold
- with large primaries on the EXH
- OS int. valves

Having said that, any cam will make more power with more compression, Static that is. Id suggest around 11.7:1 on pump gas w/ engine management, and that means tuneable software, not a "chip" or a VAFC.

JDMspirit

I saw, from the site Skunk2, some dynos of tests realised of Pro's 1 and 2 cams. Of what I had seen I stay surprised with the potential of Pro's 1. I really would like to see a dyno with the same setup to this 2 cam's, because in this dyno's they tests with diferent setup, and the result of Pro2 didn't surprised me, because of his setup.

By the way, do you know the lift of this Pro's 1 and 2 ? Thanks

LDS

Subscribed....

Combustion Contraption

They are listed on Skunk2's site.

Pro1:12.6mm INT 11.9mm EXH
Pro2: 12.8mm INT 12.0mm EXH

b-vtec

i looked i did not see where it said CP for the cams HUH//???

Combustion Contraption

He asked for the lift of the pro1's and pro2's. Those are available on the site. Read.

k20coupe

I think 11.7 to 12.5 will be a good amount

Combustion Contraption

11.7-12.5, kind of a wide margin for people with pump. 11.7 would probably be OK with 91 octane. 12.5, not so much.

Of course, now someone will come in and tell me "I/MY boI rAn 13:1 fO 6 yEarZ on 91 WIt n0 ProBL3mZ, dAWg!"

BMo Tuning

i have a friend who ran 13:1 on 91 octane for six whole years with no problems.........dog........

tuned on vafc

4dooritr

I would like to see that done in california cheesewiz so called 91 octane

sometimes my stock GSXR 1k has a bitchfit due to the gas here

b-vtec

WOW this guy... have u ever built a motor???? and do u even know how to tune??? ok then dont speak of stuff u don't know anything about... UUUUU can run 12.5 on pump gas 91 oct.... it is all in the tuning..

98vtec

nah, he has no clue what he is doing.

<---- the hammer is back w00t

Combustion Contraption

Yep. I have never built a single engine in my life. And electronic software can overcome the fuels mechanical ability to not pre-ignite before the spark plug fires.

You are the guy I predicted who would come here, spouting off in unintelligible writing, (see the "UUUUUU can run 12.5) stating that 12.5 on 91 octane is just fine and that its "all in the tuning". Tell me, whats all in the tuning? The need to richen the mixture and dial the timing so far back you sacrifice a bunch of power? But the fact remains that on a hot day, in traffic, youll STILL ping tipping in the throttle but never hear it over your melon-shooter exhaust?

You sir, are an idiot.

DonF

Be nice, next they will want to to know why EX. cam timing effects detonation. And what is wrong with 22 degrees total @wot? Other than performance.

KillaSIPP

I bet ccc has built more engines than all the pubic hairs on your chinny chin chin... lol

NVMYSTI

LMAO...my thoughts exactly

818SpoonITR

iTrader: (1)

This guy idol's this quote...

"I just went in there & Hector is going to be running 3 Honda Civics with Spoon engines. & on top of that, he just came into Harry's & he ordered three t66 turbos with NOS & a Motec system exhaust"

Grow up buddy.

BMo Tuning

i was being 1000000000000000000000000000000000000000000000% sarcastic

i need to use more often

wolve

priceless, just a pitty that some did not see the joke in there

e thug

probably a 12 year old, defenatly has a comparable intellegence

all tough i would defenatly like to see the curve on a well build b16 with pro2's

JDMspirit

Combustion Contraption I have read your 85x89 built. In there b18 you have used Pro2 with a PerformerX with 68mm TB. Isn't VictorX in a b16 to much ? Why have you advise that.

EXH, means Exhaust Header ?

Combustion Contraption

Pro 2's are too much in a B16 unless you plan on doing what I said, which was a bit of an exaggeration if you read between the lines.

JDMspirit

In relation at CR, high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air-fuel mixture due to its higher thermal efficiency. High ratios place the available oxygen and fuel molecules into a reduced space along with the adiabatic heat of compression - causing better mixing and evaporation of the fuel droplets. Thus they allow increased power at the moment of ignition and the extraction of more useful work from that power by expanding the hot gas to a greater degree.

Howevere, higher compression ratios will make gasoline engines subject to engine knocking, also known as detonation, and this can reduce an engine's efficiency or even physically damage it.

Here, where I live, the octane rating is 95 and 98RON. So, I think 12.5:1 will not a problem. Correct me if I'm wrong.

Combustion Contraption

I see you have mastered copy+paste

Since you never mentioned where you were, or what octane was available, I was responding to someone else's comment about 12.5:1 being OK, which I merely said it wasnt on 91 octane. If you arent stuck with 91, dont worry about that part.