Hey honda tech. I'm curious to know if a 10.1 compression ratio would be a hair too much for a build consisting of the following:

Jdm GSR b18c Head:
Skunk2 pro series valvetrain
Skunk2 pro1 camshafts
Skunk2 pro series intake manifold
No headwork.

Jdm GSR b18c Block:
10:1 comp pistons
Forged rods
Stock sleeves

Turbo/Exhaust:
Gt35r .82 a/r
Ramhorn Manifold
Full 3in exhaust, no cat

Fuel:
255 fuel pump
RRFP regulator
1000cc ID injectors

This setup is for a DD on 93 octane. Looking for 500whp on that octane peak numbers, but around 300 to 400whp for daily. Plan on tuning it with Neptune.

My tuner is pretty good, just wanting some opinions/insight on someone who maybe has ran a similar setup for DD.

 

same c/r i run for e85 man

 

that fuel pump might be what i upgrade or add to

 

Sorry I didn't specify. I'm not looking to DD 500whp, just peak #s.

I'll be setting bp at whatever gets me 300-400whp daily. I have yet to decide..

Did you tune your setup on any other fuel with a lower octane level? (I believe e85 is equivalent to 107 octane.)

If so what numbers did you make safely?

Up for more info!!

 

10 to 1 will never work with boost broski. It will blow up as soon as your vtec fluid engages

 

nope i get e85 at the pump here so i didnt mess with any other fuel

 

Are you sure about that?

 

Ah, ok. Well thanks for contributing.

 

up for some answers

 

you're fine. have fun. good luck

 

exactly man im at 10:1 i have been for 2 years now, and it hasnt blown a motor yet.

I have had some rod bolts let go though just falling out killing the motor, but thats it

 

Alright. Thanks for the "reassurance."

 

alot ofm people still think you need a lower c/r due to being boosted, and thats not true at all

ive heard people running 11 or 12:1

 

That seems to be the standard consensus. I also want to get a little better mpg. Lower c/r doesn't help that.

 

im going to try 12:5:1 cp in my 6262 boosted b16 ....you should be fine with 10:1

 

I was making a joke due to the noob question hence the vtec fluid...10 to 1 will work great!

 

your compression will actually be like 10.5:1 with a gsr head,

im at 10:1 right now and I love it

 

alot of people now are running higher comp, on low boost

 

10:1 will be fine like everyone stated. If I'm not mistaken Speedfactory is running 8's with a 10.8:1 compression motor. Best investment ever NLR AMS 1000.

 

I had a stock jdm b16 sir2 10.4:1 boosted to 7psi as a DD awhile back and no issues at all. The turbo needed a rebuild before the engine ever did. Don't always believe the hype and myths that you have to run "lower c/r" in order to boost.