V2Rocket

What part of the block is flexing under high loads? The top end I assume since the bottom end is pretty sturdy.

Deckplate seems to be a good answer..maybe sleeving a 104mm block down to 100mm or 4.00" would stiffen things sufficiently. 6 or 7:1 CR and turn it up...

Keeping the head on would probably be the most challenging part - no material on the block to add extra studs/bolt holes unless you were able to weld something on or maybe some sort of bolt-on fixture to the sides of the block with vertical bosses?

Paulyy

Maybe they don't have the tool for our cams? IICR They have tools for each cam lobe specs. Not sure how difficult it is to make one?

goatfarmerdave

Talked with a gentleman from the States yesterday at Mosport with a highly modified 2.5 turbo. He told me in the back of the block or head there is a water jacket that is not drilled all the way through.It just ends.He says that the water in that area creates a tremendous amount of steam from all the heat and has nowhere to go.That's where all his head gasket failures were.He drilled it out to the outside of the head and ran the water through a line back to his rad reservoir and has never had a gasket failure ever since. His car was highly modified and the only car that beat him all day was a modified GT3. It was wicked.

Cheers

Reimu

Opening up that steam pocket is a pretty common thing now.
Some people go nuts and put 3 or 4 big tubes right on the head.

Did Corelone(sp) ever have head gasket issues?

odurandina

no....

because he mostly just drives his dd or GTR.

refresh951

He had a lot of HG issues. He was running something like 9.5 CR which increases peak cylinder pressure significantly. I think high CR with the 8V head is in general a bad idea.

333pg333

He sold that car years ago.

Paulyy

He pushed that engine, where no man has pushed a 944 engine.

333pg333

Special Tool...

Paulyy

he definitely was special.

Penguinracer

I'm pleading total ignorance here...but why was "Special Tool" so..."special?"

I thought he was building dyno-queen motors just to see how hard these things could be pushed - call it NDT if you like.

Was the veracity of his figures called into question?
Tim

Penguinracer

...or was there some sort of business dispute with other posters...I vaguely recollect a number of accusations - not that I want to take this thread there at all.

The water passage drilling interests me.

Tim

reno808

So did Special Tool......

Voith

Part of his HG problems was in phuzion head gasket. If I remember correctly the ring fell in to cylinder at least once.

Probably this kind of problems killed off phuzion type headgaskets, as Cometic discontinued production.

Paulyy

With tools engine compares to the engines i'm talking about.
Tools ran a 1/4mile in 15 seconds or someting near. where the engines i speak of aren't dyno queens but are drag built engines made to run sub 10 seconds.

But i cannot remember what tool did to the engine.