Porting a type 4 head, Not much of a short side Options

[Shivers]

Because the port is almost straight, with little long side short side concerns, with what there is , do you find it necessary to slow the flow down on the “short side” to get good flow out of the valve. I was reading about something mepstein posted a picture of. Small divots, like a golf ball. So I’m going to do that on the long side, just wondering if there is any reason not to also do it on the short side. Thanks guy’s (IMG:style_emoticons/default/smile.gif)

[HAM Inc]

It's true that there aren't many 200hp 2.0's out there. But back in 2006 Jake and I collaborated on a SCCA EP engine that made 206hp at around 7500rpm's. It was legal, reliable and raced well. Was a turd under about 5K RPM's but it didn't see those revs in a race.

We also had 1.8 FP engine that made 186HP. It too was legal, reliable and raced well.

100hp/liter is doable with a N.A. T4 but it wouldn't be streetable.

[Charles Freeborn]

It's true that there aren't many 200hp 2.0's out there. But back in 2006 Jake and I collaborated on a SCCA EP engine that made 206hp at around 7500rpm's. It was legal, reliable and raced well. Was a turd under about 5K RPM's but it didn't see those revs in a race.

We also had 1.8 FP engine that made 186HP. It too was legal, reliable and raced well.

100hp/liter is doable with a N.A. T4 but it wouldn't be streetable.

I’d be interested in the specs of an FP / VP1 legal 1.8. I believe the max carb size is 40mm?

[HAM Inc]

It's true that there aren't many 200hp 2.0's out there. But back in 2006 Jake and I collaborated on a SCCA EP engine that made 206hp at around 7500rpm's. It was legal, reliable and raced well. Was a turd under about 5K RPM's but it didn't see those revs in a race.

We also had 1.8 FP engine that made 186HP. It too was legal, reliable and raced well.

100hp/liter is doable with a N.A. T4 but it wouldn't be streetable.

I’d be interested in the specs of an FP / VP1 legal 1.8. I believe the max carb size is 40mm?

The FP rules allowed 38mm venturis in 40mm carbs (we ran Dels), 42 x 34mm valves, any port work, any cam, 94mm x 66mm bore & stroke. LN Engineering was on board with the development too and supplied Nickies and JE Pistons. Foley exhaust. I spent a tremendous amount of time on the heads. Jake assembled and tuned it.

Nothing run-of-the-mill about either of the engines.

[Charles Freeborn]

It's true that there aren't many 200hp 2.0's out there. But back in 2006 Jake and I collaborated on a SCCA EP engine that made 206hp at around 7500rpm's. It was legal, reliable and raced well. Was a turd under about 5K RPM's but it didn't see those revs in a race.

We also had 1.8 FP engine that made 186HP. It too was legal, reliable and raced well.

100hp/liter is doable with a N.A. T4 but it wouldn't be streetable.

I’d be interested in the specs of an FP / VP1 legal 1.8. I believe the max carb size is 40mm?

The FP rules allowed 38mm venturis in 40mm carbs (we ran Dels), 42 x 34mm valves, any port work, any cam, 94mm x 66mm bore & stroke. LN Engineering was on board with the development too and supplied Nickies and JE Pistons. Foley exhaust. I spent a tremendous amount of time on the heads. Jake assembled and tuned it.

Nothing run-of-the-mill about either of the engines.

Many thanks Len. That’s pretty much as I expected. It will likely be my next engine. I’ll poach the 911 type fan, dry sump etc from the current one. Should make for a fun and competitive car in both FP and VP1. The gearbox will love it too.