fabbed up cooling shroud

[BOBTAIL]

The simple solution is make more power.

I really have a problem with accepting that a T1 fan is the best solution.
If it were that good then Porsche would be using it too.

A 911 fan has the cooling capacity to cool an engine with over 400bhp at the crank.Russ has been using his car for over 10 years with a 911 cooling system and obviously he's not the only one.

Also worthy of note Russ uses a 5 blade fan for racing and the 11 blade for road use as the 5 wont cool the motor properly.Also the T4 heads seem to poorly manage the heat once you get in the 200bhp range the underside of the head seems to hold the heat in and distort the sealing surface.
The 911 heads definately manage heat much better.

My 2 cent fwiw

Paul

[Wally]

Originally Posted by BOBTAIL

.Also the T4 heads seem to poorly manage the heat once you get in the 200bhp range the underside of the head seems to hold the heat in and distort the sealing surface.
My 2 cent fwiw

Paul

I just reread this and I think you have a point: Why else would Klaus make an eleborate 'under-side-cooling' ducting for his cooling shroud system and why would Remmele adapt the existing Lackstätter design (basicly the engine plus heads) by adding huge amounts of fins underneath the heads?

FWIW, I never understood the 5th-stud design where they only make an extra head stud at the top of the head stud pattern instead of underneath...
especially, as the bottom row of studs are not only longer, but also have an extra 4mm of stud spacing! Obviously, if there is a problem, it lies at the bottom of the heads...Because of the aformentioned 2 issues, the exhaust ports being at the bottom may not even matter that much (hence the Remmele design where the exhaust ports are at the sides and he still gave it extra fins at the bottom).

Paul , you get your 2 cents returned

[SuperRSi]

I think even Porsche got headaches thinking about it. They just went water cooled and don't worry about cooling anymore. Uh, Oh. Sorry could not help it...

Randy

[Wally]

Originally Posted by SuperRSi

I think even Porsche got headaches thinking about it. They just went water cooled and don't worry about cooling anymore. Uh, Oh. Sorry could not help it...

Randy

Haha, no, afaik, they couldn't comply with the stricter sound (noise) levels when they kept using aircooling

[oicdn]

^^^ Yeah, my buddies 89 Carrera 4 runs at MOST 180 just sitting there idling on a hot summer traffic jam day in Florida according to his gauge. That's pretty cool compared to alot of water boxed engines. Just my little blurb of useless info