So there would be no point really to do a NA->TII swap if you can't use the entire turbo system to it's full advantage. Unless you got it tuned professionally that is, than it would be worth it.

yes but u also have to figure the high compression makes up for some of the boost lost

Makes sense to me. https://www.nopistons.com/forums/pub...#>/biggrin.gif

well on my 6 port turbo setup, i have the rtek 1.7 ecu w 720cc secondarys , and then i was using a SAFC( again which i had laying around) to add some extra fuel just to be on the safe side.



i dynoed 231hp at 10 psi on a 6 port motor with about 200K miles on it ( haha yeah a time bomb waiting to go off!!, but i wanted to try something different and it actually lasted about 6 months of hard abuse, gave me enough boost fix till i could start building a real street ported t2 motor. This is why i caution against turboing a worn out motor as they wont last if its about to go allready)





in comparison i dynoed 133 hp NA with ehxuast on the dyno. allmost a 100 hp increase, i was more then happy, torque increased about the same as well

wow congratulations

wow! that's not bad at all! i might have to do one of these sometime. but only with a n/a with a LSD

i like these numbers. i have 720 secondaries and a SAFC2 also, but no rtek. but fuel wise that just tweaks the maps so you dont have to tune out as much fuel when the 720s kick on, right? and did you retard the timing any yourself or use stock NA settings?

i found on my t2 that around 8psi, with 550/680's that it was just about right. or 10% more hp + 10% more fuel worked out rather nicely.



id start with the timing retarded a little, and see what it likes, have a feeling its going to want to be close to stock...

i wouldnt imagine that NA and TII engines run the same timing stock? and since were boosting NA blocks, i would think retarding the timing a little would be a good idea?

well on the issue of timing, the rtek ecu is designed for a boosted motor and has timing maps for running boost.... most people say the stock timing maps are fairly conservitive anyway.....



so i think timing is allright on the motor, this would be why i added some extra fuel to keep temperatures in there down a bit



i supose it wouldnt hurt to turn the cas back a couple deg or so, but then your timings gonna be a lil off all the time...