Alright, so me and a friend have been debating with each other for awhile about 3MM Headgaskets and Stock Blocks.

We both are looking to get 400 WHP out of our cars, but plan to go about it in 2 different ways. He believes that just adding a 3MM Head Gasket, and his car will be as reliable at 20LBs of Boost as a full built motor. He then argues that a fully built motor still has a 3MM Head Gasket.

My arguement is different. I've read that 3MM HeadGaskets are bad, due to the fact that it changes I beleive the Ignition time (?) because the distance the piston travels up has no been changed in relation to the head/valves? For 400 WHP, I will looking atleast a Piston change if I could get away with it, but will prolli end up picking up a sleeved LS Block and going from there.

Please add some input into this debate, and help me prove him wrong that jsut because he had 310WHP with a B16 Turbo'd CRX does not mean that a 3MM Headgasket and a BlockGuard is a full proof way to 400WHP that is reliable.

 

It just lowers your compression is all. I wouldn't run a 3mm head gasket. Stock engine with the 3mm head gasket is still a stock engine. Nothing close to a fully built motor by ANY means. The rods/pistons will let go just as easy as yours would with the stock head gasket. I don't know where he is getting his info from. lol

 

on a stock honda block you should be safe at 400. I have seen a few cars make around 510whp with just pistons and rods, these motors have been running a few years. look at my sig that was completely stock internals, and lasted 8 months

 

stock block here and oem gasket well over 500whp

 

Technically, they're all stock blocks, just sleeved

 

There are a million and a half different ways to make 400whp on a Bseries.

3mm headgaskets and blockguards are rather old school and often times do more harm than good. I wouldn't ever use a blockguard and I sure as hell wouldn't ever use anything but a Honda headgasket. But that's me and my 400whp Dseries. And no, my "built" engine doesn't have a 3mm headgasket because they are unnecessary and inferior to the Honda ones.

Where was I going with this? Oh, right. Your friend knows nothing about how engines work. That's all you really need to know, you're doing it the right way.

 

hmm, i always thought stock hg's was 3mm. how thick are stock hg's just for my knowledge?

 

stock is .030" which is .762mm

 

i knew there was a 3 in there somewhere lol. go e85

 

stock blocks are fine at your power, stop fighting around about headgaskets ans ****. use OEM HG, E85 as civickiller said, upgrade fuel system to where you have enough to support your power goal and e85. stock rods ands pistons are fine at your power.

 

ok let me rephrase stock b18c1/crank/p72 pistons/blahblah blah everything wa like it was bought brand new

579@28psi

completey stock, and the block is still good after about 30 trips down the track

 

i understand the compression debate of the hg, but the actual strength of the b18c hg is beyond what the sleeves will ever take. it's 3 layers of stainless steel. the sleeves will distort and cause leakage way before that gasket comes apart. it would take just an insane amount of pressure for that gasket to actually come apart

 

Exactly, a thin, well made headgasket will not be subjected to anywhere near the pressures that a thick headgasket will. The nice thin surface area will keep you from blowing it out.