Michael Lutz said:
What would i have to do to build up the engine as you said?
It depends on what you want, how much money you've got and how much you are willing to spend.
Let's say you want to be able to run 15PSI all day. That would put you (guessing) close to 280 crank HP assuming all parts are right (e.g. intercooler capacity, compressor/turbine sizing, A/R ratio etc) and the fuel is there.
To do that reliably, you'd have to:
- source forged pistons with 8.0:1 or so
- upgrade the connecting rods
- do
something about the open-deck (e.g. block guard?)
- think about improving the KL03s oil-squirters for better piston cooling
- consider O-ringing the deck for
oil pump upgrades (if possible) along with a cood cooler etc
The crank is pretty strong as is, but the pistons and rods will need help to live reliably over 10PSI. Note that I've used the term "reliably' several times. I know of one fellow who boosted his internally-stock 626 KL03 to over 12PSI and it lived. That was on the dyno and AFAIK, he didn't boost on the street like that. He's since gone on and built a stroker '03 and is boosting to 18PSI using what was Fortier's stroker kit. That will be a scary car to see. He should be in the 12s if the transaxle and half-shafts survive
Of course, with that kind of power an open differential isn't an option: you'll
need an LSD to put it down to the ground. Look to spend a bunch on that plus installation. There's the requisite clutch upgrade too.
"How fast do you want to go?"
"How much money do you have?"
Think about leaving the guts of the engine alone and boosting to, say, 9PSI. You'd still have one of the fastest daily-driven MX6s around and will have saved thousands. And if you blow the engine, KL03s are abundant and pretty cheap
