Thread: O-ring block...head...?

Hi guys well my motor is being build ..., but with my experience I know for fact that this motors do not seal (head gasket) propertly over 600whp even with the 1/2 head studs , I know i have to o-ringed the block ( or head)now to proper seal , I would like to ear your opinions on this since there is almost 0 info regarding this on a sr20 blocks....
Regards.

We have used o-rings on the head for many years without issues but i think that on the block its better since you dont lose the o-ring if you have to resurface the head..

Thats odd....There have been several people go into the 700+whp range on stock sleeve det blocks without o-ringing the block or head. Its just a matter of how good your machine work is on the block and head so they are as flat as possible. I mean zero tollerance when coming down to being perfectly flat.

Also what headgasket are you using?

On my de I was in the 520-550whp range at 30psi of boost and never had any issues with head lifting or gasket sealing problems. 11k miles of torture. 20 psi daily, 30psi on weekends and at the track on C16.

I dont know if you have read my current build but im shooting for over 700whp on the same motor, with just some head work, C2 cams, S&R's but same block, pistons, and rods. I am using Golden Eagle B16a headstuds (honda guys such as Tony from T1 use these on his current motor that is well over 1000whp) and they are standard size. Also using the Cosworth headgasket which in my opinion and by looking at them they are right there with the much more expensive PE gasket that mazworx sells and uses on their motors. Only bad part is the Cosworth gasket is not out there yet for a VE motor. So a PE gasket would be my next suggestion. Im assuming your using the VET metal gasket am i correct? If so they will not perform as well in really high hp situations like the PE or Cosworth gaskets will. I believe this has to do with the firing ring design on the gasket. The Cosworth and PE gaskets were made to handle extreemly high cylinder pressures.

Biggest thing for you is make sure your head is perfectly flat as well as your block. Especially having 1/2" headstuds you should not be having cylinder sealing problems especially with a good headgasket. Again i suggest the PE gasket if you were not already using it.

How are you been doing guys?, long time no ear from you..

Payu como estas hombre? todo bien?

Ashton I will read your new build ...


Well this is the scond motor the 1one got vet head gasket and golden eagle hs no problem til 600whp(16lbs) ( I use the car for high speed most of the time so 4-5 gear at wot for more than 35sec), the head and block is perfect laser machine marmol table head and block so no probs over here actually the HS did (GE) did stretch on 2 hs ( maybe a bad hs... who knows??) the stock ones do not go over 520-550whp .
this new motor got even higher comp 12,5 over the last one , Im woried about the head gasket prob , even in mitsu evos over 600whp on our dyno means problems , the very same I got with my motor. We did o -ring the evo block and in perfect now 0 probs and runing over 700whp, so I will do the same but I was wondering about our block since is aluminium....
Does mazworx sells alu rods? I need them...
The general idea with this motor are 2 to 2,5 bar of boost I know it can be done even with this high comp and what ever whp and torque that could give with the s362. then I will use a gt4202r and see if the tranny and the complete car can hold
For every one who is interested in what Im doing here is the list

cp 12,5 comp
Manley rods for now
supertech spring reteiner 130lbs
supertech valves the very same mazworx sells
PE head gasket
n1 cams
Mazworx 1/2 head studs
complete head job
n1 intake tb ported to death haha both of them ...
3turbo back
3 intake piping
nisei fmic the biggest one
meth injection 2000cc
4-875cc inj plus 4-175cc inj
dual walbro in tank + bosch 044
s362
motec m48
custom made n1 gear box 3 and 4 gear hope it last
that about it.

thanks for the tips and anwers guys!
Have even ear of 75+ lbs on a 2.0 motor? ahahahha some crazy guys over here are doing it...
You are going to be amazed when I show you some pics...

Payu do you have pics of the o-ring head ?

Regards

Imknow of a few that have done it just not on the sr20 and they love it and making big power. If I were you and had the opportunity I'd o-ring the block. Iv seen good out of it.

Yeah man, I would look into the PE gasket. I think thats your main problem is the VET gasket is just not capable of taking that much pressure. The PE gasket like the Cosworth have an excellently designed firing ring that really creates pressure in key areas around the cylinder, coolant passages, and oil passages and nowhere else. It seals where needed and nowhere where not. When i took the head off after the 11k miles you could see the black impression on both the head and block where the firing ring and other sealed areas were. Especially dark around the cylinder area.

Did you measure the studs to see if they stretched or were you guessing since the gasket blew between two cylinders that thats what happened. Again T1 runs GE's on their motor with i think in the range of 1300whp now and they are standard size studs and im sure in the 50+psi range on a 72mm turbo and he has never had stud problems.

When i took the head off, after a year of use and no retorques (which are not required anyways from GE when using their installation procedure) they were tight as hell and in excellent condition. No stretching at all (measured).

I think your issue was with the gasket, really i do. I would definetely get the PE gasket from Mazworx for this build. Cant stress it enough. I mean if it still fails to hold then i would go to the point of O-ringing.

Im not saying there is anything wrong with o-ringing the block (and yes it can be done on aluminum blocks (honda guys run them all the time) but I dont know if i see it worth the hassle and money. Although you are running really really high compression with boost so again maybe you should. Even then i would get the PE gasket.

Sorry but no pics..
I am not a pic freak jajajaja
And I am done for the moment of the racing scene jejejeje
Since my last year car accident (on my B13) my vision of life changed jejejeje

Amigo aqui tengo unas de hace un tiempo... (DE Head)

Basicly the o-ringed head or block does the same thing as the really nice gaskets such as the PE and cosworth with the excellent firing rings but to a more extent. Again I think you could get away with just using a good gasket. And if you o-ring i would do the block not the head.

Thanks very much guys .. O ring done.

Regards