Dan's showing off some!

[dan.bubb at gmail.com (Dan Bubb)]

Take a look here: http://www.pumaracing.co.uk/turbo.htm

All I personally know is that this engine is way better than the old
engine. Very responsive and wants to build boost easily. But there
were way too many changes; different turbo, 5% more displacement with
higher CR, and conversion to electronic injection, plus the P & P, all
at one time to apportion the improvement. Mostly, I think it's the
different turbo, but I wouldn't have spent two weeks porting it if I
didn't think it was going to net some gain. I didn't open out the port
sizes that much. If you run your finger around inside a stock port you
can find lots of edges and discontinuities. Mostly I took care of
those and cleaned up the area right around the valve guide.

Also, on this thread posted by Neal, if you look down a ways, you'll
see a list of HP made by various people with supercharged engines.

http://forums.vwvortex.com/zerothread?id=1476793

Seems to me that the guys with ported heads are making more power and
generally with less boost.

Me? I just like to pinch out every couple of HP that I can ;^)
Dan

On 9/21/05, Jeff Toomasson <area53@validpath.com> wrote:
> Hey, Dan - this is purely out of curiousity - was the head P&P'd before you
> undertook this particular build? The reason I ask is that I was told by a local
> machine shop that a P&P won't really present a significant gain under FI
> conditions. Has your experience been otherwise? At least to me, it seems to
> make sense that at least a nice polish would help and then even a porting would
> allow more airflow...but it's definitely a lot of work and/or $$ that I would
> avoid if it doesn't help that much. I've been debating this very thing on my
> turbo x-flow head ever since that guy told me that...your thoughts?
>
> Your workmanship is looking good as always!
>
> JT
>