Wtb Vnt S-60

[84omni]

Quote:

Originally Posted by ironbird720 well its going to be awhile now before I get it running because the rings are shot now after putting everything back together.went for a test drive and spun the tires in first gear and half of second and was a little dissapointed because performance felt no different so when I got home I did a compression check.results were 30-60-72-72 and timing is all good so as soon as I move into my new house the engine is coming out for the fourth time and finally getting forged pistons and should be good to go.Very stressfull but got to much into her now to give up so this winter she will be done for sure.

How long did you drive it before checking the compression becaues it will take a few miles for the rings to seat and the compression to come up. Good luck with the car. Jason

[ironbird720]

The bottom end has 20k on it,all I did was put on the new turbo,ported intake,ported exhaust,ported head with new lifters and springs with back cut valves and and a new valve grind.Used the old cam that has almost 20k on it too.Shoulda just did everything right the first build but didn't want to spend that much but now it's to late and have to go all the way now.I would have actually saved money in the long run.

[90vntShadow]

Quote:

Originally Posted by ironbird720 The bottom end has 20k on it,all I did was put on the new turbo,ported intake,ported exhaust,ported head with new lifters and springs with back cut valves and and a new valve grind.Used the old cam that has almost 20k on it too.Shoulda just did everything right the first build but didn't want to spend that much but now it's to late and have to go all the way now.I would have actually saved money in the long run.

Not sure how you lost compression in 20K, unless you were boosting real high, broke a ring, or cracked a piston from detonation. Here is a thought, if your valves were not lapped you could have some valves that are not seating right since you have a fresh valve grind.

[ironbird720]

I think I will pull the head first and get it checked because that was my first thought as well because it ran good before I took everything apart.But would it cause blowby because the oil dipstick is pushing out now.Also the oil cap and pvc are blowing hard which I could see happening.Anyhow I'll check the head first before I take everything out again.

[90vntShadow]

Quote:

Originally Posted by ironbird720 I think I will pull the head first and get it checked because that was my first thought as well because it ran good before I took everything apart.But would it cause blowby because the oil dipstick is pushing out now.Also the oil cap and pvc are blowing hard which I could see happening.Anyhow I'll check the head first before I take everything out again.

No, if a valve was not seating it would blow pressure into the intake or exhaust not the crankcase. Sounds like rings or cracked piston, pull the valve cover and make sure the valves are closing. I do not think that is your problem though. Something is not right, since you also had the valvetrain noise. I would pull the valve cover, then the head and go from there. I feel for you, I have to pull my head again. My new head had a bad cam bore and the cam was binding bad, so I ended putting the stock head on so I could drive it from Phoenix to South Dakota when I moved. Got the new head line bored and ended trailering the car for the move anyway. Good luck.

[ironbird720]

well I finally starting working on the shelby the other day and the motor is ready to be droped out the bottom.Going to call cindy soon and order some forged pistons in the next week or so.curious to take apart the motor and actually find out where the problem is

[Twizter68]

What did you find when you cracked open the bottom end?

Watching with interest; making plans for a build on my newly acquired 90 VNT Daytona....

[t2voyager]

Quote:

Originally Posted by PUNKslip In case anyone cares, I just got my T-28 VNT back from FWD, looks awsome-like new. She used my old one for the upgrade. I want to put it together and try it, but the car is pretty beat up as far as missing spoilage and the interior is rough. I don't know whether to spend the money, or just sell it so someone else can give it a shot. So far so good Ironbird, nice setup! John o. Crete, Ne.

hello john o. in crete,NE i always wonderd who else had a vnt in NE i live in lincoln an would like to see pics of your car

heres mine:
[IMG][/IMG]

[ironbird720]

pulled piston #1 out and top ring basically fell all over the place.probably broken in about 4 pieces with cracks all over.time to order some real pistons this weekend.:)

[marcus5065]

Ironbird720,

So did you have the stock cast pistons in your engine? Did the level of boost you were running cause the problem with the top ring(?) And it looks like (based on this thread) you were running 18 lbs, with spiking to 20-22? Is that accurate?

[ironbird720]

ya they were mahle pistons i had in there on the second rebuild.Cal is 16lbs but ya It was spiking 20 then settling down around 18 with the stock turbo

[85boostbox]

What exhaust are you running out of curiousity

[ironbird720]

Fwdp ported exhaust manifold with 2 1/2 exhaust pipe into ravine performance exhaust