cross-flow vs g60

[sad_rocc at yahoo.com (Dan Smith)]

TD manifolds do seem a bit hard to come by, but there are always 8v turbo manis for about $200 on vortex for sale. X-flow heads aren't too hard to come by around here and I'm also on a budget. As for a turbo 'kit' those are all way out of my budget as they seem to run over $1000. And it snowed a few inches here last night and will snow for most of next week, so time is not a huge factor. Without a garage, winter is just a time to collect parts and get stuff ready. I'm sure I can find what I need by May. I assume Kotex=Vortex? I don't venture into the FI forums too much but I'll start checking it out.
 
Dan

Drew MacPherson <drew@scirocco.cs.uoguelph.ca> wrote:

The TD manifold does look very restrictive, but remember that on the 
throttled gas engine you're pumping very little air at part throttle 
(compared to the unthrottled diesel, which always wants the maximum air 
possible.) The restrictive exhaust mainfold will not necessarily hurt 
part throttle performance, but it will significantly increase exhaust gas 
velocity as it hits the turbo, which will help the turbo spool faster. 
Exhaust after the turbo should be unrestricted, which is where the stock 
A1 and A2 TD's fall short - a custom downpipe is a must for any kind of 
performance.

The TD mainfold is not likely to unleash the maximum potential of a
turbo'd 8V, but I'm thinking that you'll still exceed the performance of a
stock JH with any other bolt-ons you could throw at it (excluding a
supercharger, of course.)

I would never dream of building a serious turbo project on TD parts. 
However, if I had all the parts (just need an x-flow head) and the time
(yeah right) I'd seriously consider throwing togteher a cheap-ass JH turbo
just for the hell of it.

Drew

On Thu, 30 Oct 2003, Dave Ewing wrote:

> Hey, I got an 8v turbo diesel manifold!! It's going on my TD though! It
> looks to me to be quite the restricted setup and when comparing diesel to
> gas, especially turbo, they are apples and oranges. Knowing what I know now
> (building my TD) I wouldn't use anything off of a diesel for a gas turbo
> motor.
> 
> Dave


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