abv

Does anyone Know what the maximum efective compression ratio on pump gas is? I've done some searching and found at least one person running 20+...
Ive read elsewhere 18-19...

so here are the questions....

1) What is everyone running?

2) Id imagine that you could run higher effective compression on a supercharger set up than a turbo (supercharger spending less time at max boost..) confirm / deny please...

My plan is to boost to around 14psi....for now... I have a head...soon to be installed once i figure out the gasket thickness (leaning toward stock thickness) that is at 10.5 to 1

Thanks in advance...

Spec_Ops2087

I think you mean mximum safe effective BOOST level. If anyone ran a 20 compression ratio on this car, the engine would explode I'd imagine

That said, ALTHOUGH they are many factors (slim I know you'll post with the delta pressure from in and out of the engine!) rule of thumb is probably 20psi is pushing it with a 3mm headgasket.

On stock compression, 10psi is your line where reliability can be questioned (although some run 14psi stock but I wouldn't trust it).

abv

Actually I do mean effective compression ratio.

check this link out describes it pretty good.

http://hondaswap.com/turbo-information/sta...pression-29102/

Also try doing a search for "effective compression ratio" here as well there are some good equations for it.

Now I know that limiting detonation has a lot to do with high boost levels but im sure there is a ceiling somwhere of what people are running...

any takers?

ChefJ

Find a very good tuner.
Probability is one thing actuality is another.
We can all sit here and say I wouldn't this, or it could that, blah blah.

Spoolin

I'll be running a total effective compression of around 19-20:1 with around 17 to 18 psi on my 3mm HG and 8.8:1 compression engine. It will be just fine on pump gas this way if you have a very good tuner.

Venomous S

I'll be running probably 20psi soon on 2mm headgasket










But on C16

TheCarGuy2021

I'll be running 12PSI on my S/C on stock head gasket soon.

Spec_Ops2087

In that case, I'm running a 23.13 effetive compression ratio safely