stroked small blocks in the race cars?

[PDUB]

Seems like I have heard that Webers don't like the LSA to be less than 108-110 degrees... trying to remember where I got that info. Sound right?

[blykins]

Originally Posted by PDUB

Seems like I have heard that Webers don't like the LSA to be less than 108-110 degrees... trying to remember where I got that info. Sound right?

Depends on the engine. The factory Ford race cars were tighter than that. Last FIA 289 I sent out was 106.

Webers have very short runners, essentially non-existent for all intents and purposes. Tighter LSAs increase overlap, which can introduce some reversion into the intake manifold.

Reversion doesn't matter at 7000 rpm, so you cam the engine for its intended purpose if it's a race engine. If it's a street engine, then it needs to be cammed to minimize reversion.

Most guys think, "Oh it's got Webers, I need to go 112-115 LSA", but again, it's totally dependent on overlap.

[1795]

Just talked to the engine builder, my build specs say Dart Iron Eagle, but the heads are WP Windsor Jr 180 cc with 58 cc chamber. According to what I can find they flow 226 cfm at intake and 144 cfm at exhaust. Not the best, they have not been ported. The question is, do we port these or if available get the Dart Iron Eagle 200 cc heads with a 58 cc chamber that flow 285 cfm at .700 lift without porting? WE might be stuck with these heads, as supplies are drying up. Luckily we were able to find a block and it will arrive January 4. Some suppliers were telling him not until March 2021 at best due to the factory being shut down, or at best running on low production line numbers.

Brent, the builder and I both agree that the cam is wrong and he does not know anyone that builds cos for Webers anymore. He said that the last one he had built for a SBF with Webers was 25 years ago and he recalled that it was not as aggressive as this one, nor were the originals this aggressive either. So, start putting on your thinking cap.

If available, new heads would be cheaper than porting the existing ones. Thoughts?

The connecting rods will be similar to what you do, in that they will be longer due to shortened piston height and the crankshaft being lightened.

Jim

[Anthony]

Originally Posted by 1795

the builder and I both agree that the cam is wrong and he does not know anyone that builds cos for Webers anymore. He said that the last one he had built for a SBF with Webers was 25 years ago and he recalled that it was not as aggressive as this one, nor were the originals this aggressive either.

Jim

I'd just contact Jim Inglese, and get a cam from him, as he has been playing with webers for 50 years

https://jiminglese.com/

Jim Inglese
242 SE Mimosa Place
Lake City, FL 32025

Email:
jiminglese@att.net

Telephone:
(203) 623-0659

Fax:
(203) 315-6224

[blykins]

Originally Posted by Anthony

I'd just contact Jim Inglese, and get a cam from him, as he has been playing with webers for 50 years

https://jiminglese.com/

Jim Inglese
242 SE Mimosa Place
Lake City, FL 32025

Email:
jiminglese@att.net

Telephone:
(203) 623-0659

Fax:
(203) 315-6224

Jim Inglese calls someone else for cam help.