heinrich

very interesting. Almost not enough structurally left of the block?

BC

Thats a concern H. It looks like he is tying these pots together and they are pressed in, thereby creating structure.

Louie928

H,
Haven't you heard of JB Weld? Slide in the sleeves, pour in a half gallon of JB Weld and you are done. No Leaks. No block flexing. Amazing stuff.

Seriously, Todd is the most amazing, and talented, car guy I've ever talked to. He tackles projects, and completes them, that any one else would only dream about. Someday, I have to meet him in person.

Tom. M

haha..funny you say that Louie.....as most people including myself would say the same of you...the only difference being that I have had the pleasure of meeting you in person .

Later,
Tom

P.S. Todd sounds pretty cool too...

Louie928

Thanks Tom. The big difference that I see is that Todd knows what he's doing and I launch off without a clue while figuring it out along the way. All the while, hoping that any disaster will be small and fixable.

bcdavis

Cheaper to experiment with things like exhaust...

I have great appreciation for those who are willing to experiment with engines...

Those can be expensive mistakes.

John Veninger

I'm one of them!

fst951

Straight J.B. Weld won't work well. Use an aluminum based expoxy with Aluminum puffs, 1/8" ***** of aluminum castings. That will get the coefficient of expansion right and add a lot of rigidity. It has been done by Devore and the 944 crew did this years ago. Very nice machining, however. Make sure to leave the sleeves about 0.001 to 0.0015" protruding from the deck, however.

fst951

Take a look at Darton's MID and look at the hole in the flanges necessary to keep heat build up down. You can do that now with no real problem. Later it is more difficult.

Nice looking work.

Fastest928

Very much the same as the original DEVEK R&D, with a few nice cchanges, but the same "tie it tot he block" sleeve concept. I still have one sleeved block here ready for boring ... time for a picture.

Looks like fun, good luck!

7.4 ... WOW!

Marc

m21sniper

LOL, a 448 cid Porsche motor, that's crazy. I wonder what Ferdie would say...

I know Sniper likes it.

Jim bailey - 928 International

Probably say the same thing he did after the 2 liter 911 engine grew to 3.2 liters.Something like .. "Obviously we made the engine too large in the first place"

heinrich

Or: "We designed this into the motor with the intention of doing it all along" .... they did mean for it to be a 6-litre car initially, that much is historical fact. Imagine it. Just imagine the ANIMAL the 1978 porsche 928 would have been.

Jim bailey - 928 International

I thought the engine design was 4.5 to 5.4 liters with the test mules at 5.0 on Webber carbs ? The stroke at 78.9 mm was so much longer than a typical Porsche engine. But I agree had the original 78 been fitted with a 325 hp plus engine the Dentists' wifes would have been terrified....Holbert could have done his world speed record ten years earlier ! Faced with the "energy crisis" Porsche flinched and the rest is history.

m21sniper

I'd thought they originally planned on a 5.0 for the 78 with a road to continuous upsizing to 6?

But then, im hardly a Porsche historian...