Upgrading a 1776

[mcvw]

Hi,

I have a pretty quick/reliable 1776 motor which constantly ran 15.1/15.2 quarter mile times in my old 67 bug, and I had planned to drop into my bus (if it ever gets finished lol!).

But... I'm now wondering (while I have some time to kill lol!!) if I should consider upgrading the 1776 to something more beefy to handle the extra weight of the bus. i.e. upgrade the current crank (a genuine 69mm Okrasa) to a 78.8mm or bigger!

One crank I am looking at is a forged CB 78.8mm c/w unit.

I think my current heads (Jeff Denham 40x35.5) and carbs (twin 44 webers) should be ok for the increased displacement (78.8mm x 90.5mm = 2027). I guess the case would need clearancing - due to the increased throw, but would I need a new cam (but cant remember what mine is - it's a Berg of some sorts)?

Any thoughts, suggestions (ideas of costs maybe)?

Cheers,


Mike

 

[kombiporsche]

Pull your oil pump and look what is stamped on your cam

Seems yo be a good setup, I've a similar one (78*92) and it runs strong in the bus.If you choose H beam rods with 3/8" ARP2000 bolts case will need minor clearancing, with some I beam rods wich are thicker, you'll need the same amount of clearancing as my engine.

http://forum.earlybay.com/viewtopic.php?p=76918#p76918" onclick="window.open(this.href);return false;

 

[mcvw]

Thanks for the tip. Will find out what the crank is when the strip down begins

One question for anyone: Nitriding. Should I buy a crank that is NOT nitrided. If it hasn't been nitrided, could you get it nitrided (any idea of costs)?

 

[Frisco69]

You might aswell go for the bigger crank as it's going in a bus. It should work fine with those heads as the smallish valve will help with low down torque.

I'm going with an aluminum case, 94mm B&P's, and 82mm chromoly crank for my bus. 2276cc.