Thicker HG theory Please Read

[AjRose]

I said this in my last post, but you got so flustered by someone mentioning OMG, a HONDA, that you didn't even bother reading it. Typical.

I have no problem with honda I love em I think they are very capable cars.

I guess I missed that last part of your post sorry.

[ForceBangBlow]

wow might be alittle late with this but my experience with thicker head gaskets have been nothing but good. I havnt seen with honda or anyone actually have trouble engine wise while running a thicker gasket. Me coming from VW, when youd turbo a vr6 it seemed like the limit for tuning was smaller with the stock gasket and you could make alot more power with the 8.5:1 head gasket. 20 + lbs of boost would = boom on the stock compression but would usuallly make 350-400whp with the 8.5:1. And I know cardcounter on bimmerforums made 600-640whp something in that range with a stock m52 with studs and .140 gasket. I dunnooo. :-?

[Pinepig]

wow might be alittle late with this but my experience with thicker head gaskets have been nothing but good. I havnt seen with honda or anyone actually have trouble engine wise while running a thicker gasket. Me coming from VW, when youd turbo a vr6 it seemed like the limit for tuning was smaller with the stock gasket and you could make alot more power with the 8.5:1 head gasket. 20 + lbs of boost would = boom on the stock compression but would usuallly make 350-400whp with the 8.5:1. And I know cardcounter on bimmerforums made 600-640whp something in that range with a stock m52 with studs and .140 gasket. I dunnooo. :-?

The VR6 is a wierd animal as the cumbustion chamber is in the piston, the head is completely flat. I always love the posts over on the vortex with VR folks asking how much the compression went up on their VR after shaving 50 thousandths off the head.

[eta]

So a euro eta engine with 10.2:1 compression ratio running 99 octane fuel can be mildly boosted relaibly and safley for the engine. I was under the impression that was a non starter.

[devonjordan]

3 steps back + 5 steps forward = 2 steps forward. Makes sense to me.

[So Live]

And I know cardcounter on bimmerforums made 600-640whp something in that range with a stock m52 with studs and .140 gasket. I dunnooo. :-?

Make that 704whp before it failed.

Stock m52 for him was a stock block. He added the .140 (twice as thick as stock) MLS and the ARP head studs, head work and all kinds of bolt ons.

None the less, 704 whp out of a bottom end that was made to produce about 160-170 whp from the factory.

MLS seems to be working for our bimmer motors. I know a few people are making upwards of 450-550whp on US s50's with a MLS and studs. Its a proven recipe for kick ass power.

I think the gains in mid to top end greatly out weight the minimal loss from the drop in CR on the bottom end. From what i hear, most people can hardly tell the difference just driving around normally.

[88driftIS]

Well I am another ex honda guy, I had a 95 civic with the 1.6 single cam v-tec. I had 8-1 pistons and a thicker head gasket. I ran it on 10-12 psi. My car would stay door to door with a buddy of mines 93 with the same set up but stock motor. It doesn't make that much of a difference(not saying there is no difference). It's all in the tune. Having lower compression just makes it safer. And for the guy that said that lower compression causes more detonation. Your kidding right? If that is the case why isn't everyone using insane high cr with boost. Maybe I should go 13-1 and through 15 psi through my m20...

[ForcedFirebird]

I'm almost finished with a 11.56:1SCR twin turbo motor, and am planning on running pump gas. It all depends on the cam and head efficiency.

Check out theoldone.

[1990e30coupe]

There is an upside to using the stock headgasket - if you have tuning problems or have detonation for some other reason, be glad that you only have to replace the headgasket and not pistons and piston rings, or worse, as the pressure has to go somewhere. There is really no point in a ticker headgasket when stock works.

[blueapplesoda]

Thread revival much?

[Blackangusinc]

Thread resurrection baby!

Has anyone boosted a stock M52TU with a stock head gasket? Results? Specs? Vanos maps? I have a build in progress and would love feedback from someone who has done it before.

[LowR3V'in]

Using thicker HG will lower the compresssion of the engine, but if you lower your stock compression, your motor will obviously be underpowered until you can reach boost. So your underpowered from say idle-4K rpm

No it won't. You're overthinking it.
Even if you're not actually making boost it'll be much faster then if it was stock.

[einstein57]

For most builds on e30s the headgasket is just a band aid for lack of tunning or crap gas. if a 335I can run 10:1 then 9:1 ain't shit. The evo guys run low compression so they can run 30+ psi and make 300whp. But pulling timing till its stops knocking is the way to go I guess.

[LowR3V'in]

DSM tuning =
40psi,
8.5afr,
1* timing.

[nando]

For most builds on e30s the headgasket is just a band aid for lack of tunning or crap gas. if a 335I can run 10:1 then 9:1 ain't shit. The evo guys run low compression so they can run 30+ psi and make 300whp. But pulling timing till its stops knocking is the way to go I guess.

30 psi for 300whp? I hope you mean 700-800whp.. lol