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help 85 k10 6.2 with a wh1c turbo

C

ChevyTruckGuy78

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ok i had most of all this stuff laying around

dana 60 front
10.5ff rear narrow dually rear to fit duallys under stock bed
th400
np208
8in lift w/shocks
16in rock stars
245/85/16's
wh1c turbo
and a 6.2
all manifolds and pipes to hook up turbo
new mounts

anyways im wondering if anyone can help me out with this. im wondering if the 6.2 is even gonna spool this turbo and if it can spool it what psi should i run will the motor even hold up and so on want to use it for towing and plowing i have an 01 dmax with twins as my dd
 
Yes it'll spool up. You could turn up the injection pump a small amount to help it out.

Ye ol' 6.2/6.5's aren't a hot rod ya know. 10-12 psi will do.

The danger in the 6.2's are the un-coated piston crowns.

And of course the Junk TTY bolts not holding the heads down..

If you behave, you be fine.
 
10-12 psi is pushing. max recomended is about 8 psi. once you hit 4 psi you'll notice a big difference.:D make sure you have the guages(EGT,Boost) to back it up. the pump will need to be turned up 1'/8-1/4 turn depending on how hot you want to push it. keep the EGT's below 1100F or pistons will start to melt:(. there's a few threads on here for doing this.

http://www.thetruckstop.us/forum/showthread.php?22280-6-5-turbo(gm4)-on-a-6-2

that's the link to my thread on this. different turbo, but still useful info.

I know there are more threads than that. just do a search in the 6.2 and 6.5 sections
 
Ive got a WH1C sitting in my basement waiting to go on my 6.5! Same as the HX-35, just held together with a clamp.
 
its a bitch lol just bolted the trans and tcase in today gotta rebrill the frame for the crossmember the truck originally had a 700r4 in it and the bolt holes dont line up no big deal i hade to re drillout the motor mounts to the frame. i wanna run an intercooler but it seems like its gonna be a bitch yea my plan is 8 psi i still need to do a lil reinforceing of the rear spring mounts im not completely happy with them my friend has a welding buisness so im gonna have him fab some mount extensions to handle it
 
ChevyTruckGuy78 said:
its a bitch lol just bolted the trans and tcase in today gotta rebrill the frame for the crossmember the truck originally had a 700r4 in it and the bolt holes dont line up no big deal i hade to re drillout the motor mounts to the frame. i wanna run an intercooler but it seems like its gonna be a bitch yea my plan is 8 psi i still need to do a lil reinforceing of the rear spring mounts im not completely happy with them my friend has a welding buisness so im gonna have him fab some mount extensions to handle it
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i think that trying to limit the WH1c to 8 psi boost is a waste.... you would be better off with a gm-x turbo... if you want i will trade you a gm-8 with a k-47 airbox for the holset...
 
i would trade but i rebuilt it myself and didnt balance it plus the compressor side outlet flange has been cut off thats why i got it for free just needed a rebuild
 
think i will just run it as is and set boost for like 10. i have a longblock new motor with like 60k i am thnking of building up and de compressing so i can pklay with it
 
A spare engine makes that decision easier. It is suggested not to go much over 6-8 on a factory 6.2 head gaskets as they were never intended for use with a turbo and are more prone to blowing out. No one I know of has used a holset on a factory 6.2 so who knows it might work better than the GMx.
 
I disagree with the uncoated piston crowns and EGT of 1100 causing any harm. I have run my 6.2's to flat out 1400 EGT sustained and suffered no piston damage. The cooling system and timing make a big difference in what EGT number is safe. I did have some funny rust like texture on the glow plugs when I sustained 1500 due to a blown manifold gasket. EGT is just one measure of what is going on in the engine, but, many things determine if it is causing damage.

My advice is to replace the 6.2 head gaskets with 6.5 head gaskets while the engine is out. Add ARP head studs and then run whatever boost you like. 17 PSI appears to be the upper limit on 6.2 military precups. Civilian precups are smaller. So you may think about swapping in turbo precups while you have the heads off - an easy task.
 
X2! I would beef up the top end and run it until she goes south. Who knows that block could have another 100K left on it.

WarWagon said:
I disagree with the uncoated piston crowns and EGT of 1100 causing any harm. I have run my 6.2's to flat out 1400 EGT sustained and suffered no piston damage. The cooling system and timing make a big difference in what EGT number is safe. I did have some funny rust like texture on the glow plugs when I sustained 1500 due to a blown manifold gasket. EGT is just one measure of what is going on in the engine, but, many things determine if it is causing damage.

My advice is to replace the 6.2 head gaskets with 6.5 head gaskets while the engine is out. Add ARP head studs and then run whatever boost you like. 17 PSI appears to be the upper limit on 6.2 military precups. Civilian precups are smaller. So you may think about swapping in turbo precups while you have the heads off - an easy task.
Click to expand...
 
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