Dc2chinlee

I got a b18c1 sleeve block fully built turbo... Somehow when you smash the motor, it overheats; however when I cruise normally, it runs fine... The motor is currently at 510 hp

OneBadTurboCRV

When you smash an engine (or any compressible matter really) heat is created due to friction of the molecules. Sounds normal to me. I am not sure why you would crush a perfectly good engine for though...

We really need more information about what is going on and more details on your setup to be of any help. For all we know you are using stock head bolts and an OBD2 ECU.

Schister66

Edited your title. Next time, write something descriptive if you want anyone to help you. "HELP!!" isn't exactly a useful title

Dc2chinlee

The motor is currently boosting 21 psi boost... It is built with h-bean rods, je piston 10-1, darton sleeve 81mm.. Arp head stud, Port n polish gsr head, super tech valve train with stock valve, Ctr cam, skunk 2 manifold.... Top mount turbo header with a gt35r turbo...the motor been Dyno with e85 with 510hp n 390tq On a daily basis, the motor runs normal; however when the turbo hits 21 psi of boost the engine start overheating....everything else on the motor is stock... Help any one

blackeg

Id say the head is lifting. Probably wouldn't show on compression or leakdown.

Were the block and head resurfaced or checked b4 assembly
Were the headstuds previously used
What hg did u use
What was the tq and steps u used when installing the hg
Were they ever checked and re torqued

Dark_Teg

What does your temp get up to at full boost? My motor gets up to 200+ at the end of the track.

Dc2chinlee

Yeah all the parts was check before I put it together....I never check my temp on full boost...but I'll check it

Wdpfreak145

Answer the above questions. The condition of your head studs and the process by which you mate the block to the head are extremely important in a situation like this and most likely you are experiencing head lift because of the amount of boost you're running. My friends y8 boosted setup was having head lift under full boost. An extra 10 ft/lbs solved the problem for him. May be the same for you, may not.

wantboost

iTrader: (2)

Stock radiator on a 500hp motor is your main problem.

o 16K o

Exactly what I was thinking. Upgrade to a mishimoto and upgrade fans. Im running a fan on both sides of my radiator.

Turbo-LS

iTrader: (4)

The engine shouldn't overheat under boost. It will get warmer but not overheat reguardless of the radiator type. What thermostat is in the car. What water pump how high are you revving who tuned the car. Did you take off any of heater hoses and loop of block them off.

Is the manifold and downpipe wrapped. Are they to close to the radiator without being wrapped. Turbo blanket?

mar778c

iTrader: (1)

No, that is not a problem assuming the radiator is in good condition.

It could be the tune, head lift, etc.

turbomaniac

do you have water cooler loss?

is your thermostat opening at the proper temperature?

if the above are ok, there is a possibility that you have a small crack at the head, espessialy if you are loosing slowly cooler