[Vwdiesel] Can 91 VW Jetta Engine with TDI be put in 88 gassy?

[mikitka]

I can attest to the fact that a larger exhaust will wake up the 1.6 TD.  I
installed a custome 2.5" down pipe to my KKK K14 turbo and ran 2.5" pipe all
the way back to the back with a flowmaster muffler (got the muffler online
for cheap). The opening of the exhaust really woke up my 91 ECO, (now TD)
jetta. The turbo spools up really fast to the set 15psi and you can feel it
pull once it gets up in the upper RPM's.  To me the first improvement to any
TD vehicle is to open up the exhaust. Then adjust fueling and a must,
install an EGT gage. I can hit 12,000 degrees F quickly. So you need to
monitor it if you go the route of turning up you IP for more fuel.
Nick