First of all,

Many thanks to those who replied to my earlier message regarding converting a 142 from D-Jet to twin SUs. Your help was indispensable.

Now on to the good stuff...

After many protracted trips to Northern European Auto Recyclers in Seattle (excellent Volvo-only junkyard), I finally pieced together a makeshift "kit" for turning my 142e into a 142s. Parts retrieved included:

- Combined Intake/Exhaust manifold w/twin SUs
- New (to me) carb throttle linkage
- Mechanical fuel pump to replace elec. pump
- Adjustable fuel pressure regulator to help with carb tuning refinement
- Replacement jets for SUs


After many trips to various auto shops for misc. parts such as bolts, manifold studs, fuel & vacuum lines, the system was hooked up...for now.

Unfortunately, wiring woes are still plaguing me, but I am rapidly narrowing them down to a reasonable list of possible gremlins ;). Overall this has been a great experience and I almost know my Volvo backwards and forwards now. I also took the time to strip the interior, remove all sounds deadning from the cabin, treat for rust, prep the interior and paint rally style. I am aiming to make a really fun combination of track car and daily driver out of this car. Being young, I won't mind the sheet metal interior and straight pipe exhaust. The interior and floorboards turned out to be in immaculate condition and is now finished in a tasteful athracite gray hammered-style paint job. I will try and post pictures if anybody is interested on any aspect of this conversion. I still have much work to do, but this is conversion is finally becoming a reality.

When I converted to a Weber from fuel injection about 20 years ago on my 142 I used a tee to channel excess fuel back to the tank via the existing return line. The Weber is supplied fuel via the tee with apparently the correct pressure.

Good luck with your project. I am still interested in your D-Jet excess when you decide what you want to get rid of.

Mark Richardson

If you have the standard Pierburg fuel pump you probably will not need the
fuel pressure regulator. I put one on my B20 powered 122 in days of mystery
carburetor problems a couple winters ago and after a few months the regulator's
diaphragm let go, pouring gasoline all over my engine and generator.
Fortunately I recognized the problem and when I installed it had left enough
hose that I could just take it off and rehook the hose to the front carb.
Later I checked the Pierburg's output under several different conditions and
speeds up to about 6 grand, and it was always exactly 3 psig, exactly what the
SU carbs need. I found earlier that if I set the regulator pressure to 2.5
the car would go OK for a few blocks and then begin to starve, so as nearly as
I can tell, the regulator was a pimple on the backside of progress.

BTW it was NOT an el cheapo regulator - it was name brand. Same kind IPD
used to sell, although I did not get it from IPD.

Enjoy those dual carbs!
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma