Progress Thread 1998 Gt Procharger Build--dyno And Track Numbers Inside

It was a massive disappointment and insane waste of money it appears.


This is the end of this thread. Thanks for reading.


But a coyote instead of building a 2v.

Car made 365 hp. Made 340 on npi heads and parts. So done with this pos.

I figured roughly 20% loss from the auto so maybe 450 crank. I expected to put down that at a minimum. But then again I clearly have no clue what I'm doing.

3.2 upper 6.78(stock size) lower. 12lbs. 8 rib setup.

Motor let go on a test drive.


Car is going away. Screw this hobby

Well I sent the car off to have the motor built. I'm down anyway, had my acl replaced 10 days ago and can't exactly sling wrenches right now.

I'll update again once sit runs and is tuned.

I think we are going back with 11:1 compression and steel rings this time to squeeze every pony out of this turd.

Yay for motor three.

So to recap a bit. On the Dyno it wouldn't make any power no matter how the timing or fuel was setup. During the pre test it only made 130psi cranking compression in all cylinders.

On the Dyno on the last hit it lost the lash adjuster. Number one intake iirc.

Got it home and spent the better part of a day replacing that side with super car adjusters. Took it on a test drive and after two soft hits the oil pressure gauge woulfd come on and off based upon rpm. Below 3k it didn't register any and above it had enough to make the stock dummy gauge work. Sat it in the garage and sent it off on a roll back to a trusted friends shop. He tested the oil system and it has or had 42psi warm at idle but was bleeding pressure off quickly.

He thinks my pickup tube cracked or is leaking (yes I put in a new pump and new o rings). He said he's seen it before on the older stock tubes. They'll develop a crack and start bleeding pressure.

He was able to yank the motor last night but not tear it down yet. Still likely going to swap Pistons as the used 03/04 assembly I bought had no markings on the Pistons. I don't think they are a stock cobra piston as the cranking compression indicated a much lower static than it should have. Likely more in line with 8:1 vs the expected 9.5:1 we were shooting for.


The end goal is still the same to crack 500rwhp and bust into the 10s with it.

Time will tell. I really just want to enjoy the car. I've put 200ish miles on it since sept of last year.

I'm finally able to hobble around a bit since my knee surgery 6 weeks ago.

We tore down the engine and here is what we found:

#2 piston had the second ring broken in half. No signs as to where and how it exited the engine. There are no marks in the cylinder wall, no marks on the piston, no broken ring lands etc, and no marks on the heads or valves. It's just effin gone. Weird.

#2 cylinder also appears to have been mis-machined by the machine shop. I don't remember exactly now but I think it measured .0040 bigger than it's supposed to be. (I may have a zero in the wrong place)

#2 main bearing was chewed up while the front and rear (thrust) were in perfect shape. Indicates a bent crank and that likely caused collateral damage to the block.

The rods and pistons were not what I was sold. I was sold 8 80k take out 03/04 cobra rods and pistons. The rods are what they say they are although after some number ID running they are 3 different generations, which means the seller pieced together a full kit from various cars. The pistons have 4 different ID number (Shame on me for not seeing this before install) and 3 of them are not forged. Those three were jacked up. They all looked almost identical to the naked eye and I had no reason going in to second guess them (first mod motor build). If I knew then what I know now... ugh.

The bearings had two different batch dates. (rod bearings). 7 from 2015 and 1 from 2016. All the 2015 ones were chewed up, the 2016 looked perfect. Very odd. These came from summit racing all at the same time.

The heads have an internal crack in the oil passage ways and we've decided to junk both of them due to all of the prior issues with this set of heads. ugh.

The only thing we can salvage are the full assortment of ARP bolts and the todd warren blower cams.

So I'll be selling the blower cams and putting in a stock pi 2v and just enjoy the damn car. Screw this hunt for power and the money/let downs associated with it. It's just not worth it and I want to drive the dang car.

The good news is the bearings we were able to check were spot on for clearances so it doesn't appear that any of this was my fault (other than not cross referencing the pistons).



Hopefully we have it going in the next couple of weeks. I think we are going to leave the blower on it and a safe tune. I'll be happy with 400rwhp all day long as long as it's reliable.