Twin Turbos (Massive snippage safe to read)

Frederic frederic at xephic.dynip.com
Fri Apr 16 19:57:53 GMT 1999


> I'd recommend ya look for a 749 instead.  Running a 2 bar program would be
> MUCH better than a 1 bar.

I just haven't found one in the local junkyard.  Been looking big time!  Now,
this particular ECM drives eight injectors, or does it drive a TBI setup
only?  I thought the latter, however I've been wrong before.

> Sneeze valve for a Truck, might be disaster...  (Doc+Grumpy already taking
> bets).

Actually, I'm anticipating this - and all of the statements you made about
pulsating in the intake plenum due to the sneeze valve opening and closing
repeatedly will more than likely be true.  My other option is to use a
wastegate setup, however I just don't have one at the moment.  Ideally, I'd
like to use VATS turbos, however they are not to be found in junkyards <smile>.

> wanting a low rpm monster.  It might take a ton of work to limit/modulate a
> sneeze valve for this.  Using the Wastegate signal off of the syty 749 would

Yes, exactly.  I adapted my thinking to low RPM only, hence the 4k cutoff
point.

> Might think of using a EGR as a spill valve,  would be to be electric not
> vac operated (ie newer Digitial type)

This is a good idea actually... I had not planned to have any emmissions or
recirculation anything... vented the old way, since the hood will never be
opened at the emissions station.

> One think about sweeping statements is that they are usually wrong.

LOL, good point :)

Frederic




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