I was at my friend's shop the other day and he was mentioning how the honda s2000 I think guys drop in a bigger head gasket to lower compression, and turbo. Could we do this as well to gain more boost with sc/tc?

 

If you want more boost, get a tune.

 

I don't haz boost I just want to know if this would work for us the same way if boosted, and if its safe?

 

Hondas run what they like to call high compression. so they run 2 steel shim head gaskets to "drop" compression.. every honda owner does it. My honest opinion it does nothing but they swear it lets them boost more.

 

So don't even bother then. Next honda owner you see tell them to do a compression check to see if it really lowered their compression.

 

I mean look at the head gasket what is it gonna drop... Maybe .1. My cousin has a 852 hp b18c1 in his 99 si civic with 1 head gasket from honda. and running 8.5/1 compression with 30 psi from a gt34 turbo.

 

I was just thinking that my self it's a thin piece of metal how could it do hardly anything haha

 

You won't gain boost, but you will be able to run higher boost levels without the fear of detonation.


I have no clue what the hell you are talking about here. 2 steel shims? You mean MLS head gasket?

All factory Ecotec head gaskets are MLS (multi layer steel)

You are thinking of compression, not compression ratio.....compression ratio can't be messured, it is calculated before building a motor.



That taken care of.....


Yes, you can use a thicker head gasket, yes its safe, no its not "ideal". You should use dished pistons to lower compression.

The stock 2.4 head gasket is 0.040" I believe, running a thinker 0.070" gasket will lower your compression ratio from 10.4:1 to around 9.4:1.

Then again to find the exact numbers you will need to do the math yourself.

 

oh ok. thats close to ss/sc. maybe i'll do it when I sc just to be on the safer side of no detonation rather than higher boost. I'm not looking to get 300+ hp just a few extra ponies and bragging rights.

 

interesting

 

imo hondas seem to respond to boost way better with high compression.

 

Why would you want to drop your compression to run more boost? Kinda of a dumb idea. Just because you can't run 15 or 20 pounds of boost don't mean you could make same hp at 8. Boost pressure just shows how much resistance is in your engine. I know a few s2000 on 6psi and 15:1 compression dude makes almost 400hp. Hell dsm's are always bring the compression up so we can increase our power out put. I am going to be using 11:1 pistons instead of thes 8:1 and still be on 30psi. Bottom line don't think boost is the only thing that makes power it's actually the amount of cfm's you can flow.

 

oh

 

Yes, but those examples you gave surely don't run on pump gas.

The idea is to lower your compression ratio to help lower cylinder temps to a point in which you can still safely run on pump gas.

That being said, its not like the OP will probably ever get to the limit in which 10.4:1 and boost will be to much for pump gas, so I guess the whole point is moot...lol

 

The s2000 was on pump gas on c16 he would run 12psi or so. I guess I should say higher octane helps a lot e85 would do just fine with the compression and boost.

 

6psi with 15:1 CR on 93 pump? Thats impressive.

 

Your not kidding I think he was tuned by a company call inline racing over here.