Jump to content
SAU Community

Recommended Posts

hey guys just after a bit of advice have been looking at a 1.2mm trust gasket for my rb25det but they offer them in either 87mm or 88mm can anyone tell me which one i would need or how to tell which one i need.

bit up in arms and want to get it right

cheers

Link to comment
https://www.sau.com.au/forums/topic/173995-trust-metal-head-gasket/
Share on other sites

and whats meant to be the ideal comp ratio? 1.6 wouldnt that give you close to 8.4:1 compression ratio?

Are you being a smart ass?

I have been told the ideal compresion is 8.6:1 achived by a 1.6mm head gasket.

I have no dramas with it.

your ideal comp ratio all depends on your setup and what boost your going to run its an individual thing. ie if your gonna run 28psi through a 3540 then a 8.6:1 you might want 8.0:1 as an example but if your running 14psi through a small turbo then theres nothing wrong with 9.0:1

there is no ideal comp ratio..... machine the head and deck the block and a 1.6mm head gasket is not going to have the same effect as 1.6mm on a stocky..... h/g size is relative to application and there are plenty of differrent comp ratios that achieve the same goal... i know of a certain supra making over 600rwkw on an engine with higher comp than std.... horses for courses.

just a quickie how do you know what compression ratio you are running is it just what someone has told you or did you have it tested

ill be running 555cc injectors remap ecu and a trust tdo5h-15g turbo what compression ratio (gasket) is required for around a 250rwkw application

just a quickie how do you know what compression ratio you are running is it just what someone has told you or did you have it tested

ill be running 555cc injectors remap ecu and a trust tdo5h-15g turbo what compression ratio (gasket) is required for around a 250rwkw application

dont even bother std is fine for that setup, done a few now. Just make sure you get a good remap.

Im going h/g even though I only want to push 250rwkw daily and 280-300rwkw max seeing as I will be drifting the car a bit

I'd rather have a bit of a safety net there seeing as I dont wanna have to rebuild the motor or replace it anytime soon

I know a 20 can take a hell of a bashing probably due in part to its comp ratio

Edited by 1400r

hi all

from what im led to belive

is that running a highr comp ratio than standard is a good thing you will make the same if not more power with less boost and have more bottom end torque=off boost response, but on the down side of things your tuner has less "room"or much narrower window so to speak to tune in regarding getting timing, a/f maps etc rite.

Im going h/g even though I only want to push 250rwkw daily and 280-300rwkw max seeing as I will be drifting the car a bit

I'd rather have a bit of a safety net there seeing as I dont wanna have to rebuild the motor or replace it anytime soon

I know a 20 can take a hell of a bashing probably due in part to its comp ratio

Does zero for longevity, but it will allow you to run more boost if your turbo is inefficient at lower boost levels. This is where turbo choice is most important.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • ok so if i wanted to go 18's i would go for 8's  in front 30+ or 32+ off set at front and the back 9 would be ok? what offset should i aim for.. then can i do some  hunting for wheel rim choices..   
    • Absolute f*cking nightmare. I had to take breaks constantly, and I was always pissed off when I got home. The line split in Italy on day 2 (we drove from the Netherlands), lol. Driving any narrow European town was... well, sh*t.   Appreciate it man. Here, I'll just drop a favourite from the load I took on Saturday.   I'll update here when things happen with the car, the thing is, with stock power and almost everything chassis-wise taken care of, there really are no problems. 268,000kms now and counting.  
    • Ah! I actually managed to snag a lightly used set.... that aren't so suitable for me right now. They don't work on a GTT without some cutting or creative heat moulding. I thought about reselling them myself cause I didn't want to murder them, but it looks like I'm probably going to attempt to murder them/melt them because I may as well. @GTSBoy @PranK can somebody close this thread?
    • Hey mate,  I have a set, one is slightly damaged but wont be noticable once installed.  Shoot me a message if your still after them 
    • I couldn't wait But, the black constant tension hose clamps were too thick and there wasn't enough clearance at the T/B and I couldn't get it to seat properly, so I had use a silver one there I also added some 3" silicone over the alloy bit that goes through to hole on the radiator support as it looked like it was sitting on the edge of the hole in the radiator support, I never noticed a rattle or anything, but there was a witness mark It is basicly done, and I can live with the silver hose clamp at the T/B, I will get a black clamp for the head vent though where it is attached to the bulkhead fitting  It never stops...LOL, only issue now with the shock tower brace is it slightly touches the under bonnet liner now, if I leave it it will either wear some paint off the brace where it touches, or damage the liner, so I removed the liner to see what I have to work with, with the liner removed I have about 20mm of clearance, but sadly the middle part of the underside of the bonnet is only dusted with paint and looks crap, so I cannot have that, but.... as I have a roll of Carbuilders premium under bonnet insulation in the garage laying around that is only 5.5mm thick (we were going to use it on the boys Patrol, but he crashed the front of it a few months and it was written off, hence why he now drives my old Honda Accord Euro), I'll use the OEM liner as a template and get the Carbuilders stuff fitted up to cover that dusted paint up
×
×
  • Create New...