Re: [DMCForum] Turbo Bosch X-Jet?

[Martin Gutkowski <martin@xxxxxxxxxxxxxx>]

Hi Dave

Yes - but that's my point - they all boost through the throttle plate so 
the calibrtion will be a mile out. If I were you, I'd stick with the 
stock 066cpr and hook up the front port to the manifold and the rear 
port to the throttle port. In my tests, I worked out that having a 
higher pressur ein the rear port than in the front port makes no 
difference, but having higher at the front than the rear, as it does for 
a short time on the stock engine, continues working into the boost range 
- or 5psi on my friend's Island setup. Unfortunately it works too well 
and he gets about 100miles to the tank even though he also gets a lot 
more power. I've been toying with applying a restricted bleed-off to 
that port so that we can manually set the pressure seen by it and lower 
the effect it has. It's a real shame the J&S controller's no longer 
available.

You're on the right track with the later PRV's. Certainly all the 
renault lumps after the turbo came into being all use the same 
strengthened bottom end - even the 24 valver which is why my friend with 
the Alpine Atmo is supercharging a 24v for it...

Martin

Dave Stragand wrote:

>
>
> The Porsche & Lotus turbos that used Bosch CIS must have had some way to
> effectively manage the turbo fuel requirements under boost, correct?  
> To not
> reinvent the wheel, that's what I'm currently investigating grafting into
> place.
>
> -Dave

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