Yup-
You can hit 300 with the aforementioned mods. And I think that intake and exhaust shoul'd be done first.
They help every other upgrade, and give the biggest initial boost to power.
I have had a HG where it was tight enough to keep coolant frm entering the combustion chambers, but the extreme pressure of compression and combustion would indeed push hot gases into the water jacket. An absence of oil 'milkshake' is not a conclusive indication of a good HG.
Gosh- I hate to say this, but if it's really a mint 91 all-original, I think i could handle a BHG on my first day!
The 'brown and scale' tells me that oil had probably getting into the coolant for some time. I would remove the engine and do a full rebuild.
Oil pump, bearings, full gasket set...
This has got to be the longest wait for dyno numbers in history...
Aargh!
I'm thinking about buying this turbo, and I want to know how it compares to the 57 trim.
You're the perfect guinea pig.
ps- what was your numbers on the 57?
Just torque the HG as per the ARP installation instructions.
Get a thermostatic oil cooler setup.
Shim oil pump while you have the chance, and replace the piston squirter bolts if the internal springs are weak at all.
I've had a BHG where the cylinder pressure would leak into the cooling passages, but no mixing of oil and coolant, and no reverse of coolant into the combustion chambers.
I think he means .001x inches clearance, vs. .002x inches clearance.
Sometimes, you have to file your piston rings and adjust your piston to wall clearances a bit wider for higher HP goals too.
Good work.
I've had trouble in the past, trying to get the ARP's out.
It's like they swelled up and I couldn't lift the head off them, so i had to remove them with the head.
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