Originally posted by Bobo
Thanks Joe, that's kinda what I had heard at first. Harry tuned my SP, I was gonna call him up and pick his brain a lil about this. I'm running 11.2 a/f, most guys have said that is very conservative, I'm not sure if it needs to go lower for the street and 93 octane.
One more thing, do you work @ PT? I am considerin upgrading from my T76 to a PT-88 4 bolt. I am not sure it'll bolt right up, I've heard "yes" and "no" lol. Got any clue? Thanks
I believe most of the fellows echo'ed what I had said in my earlier post about leaving the VE alone.
I feel, if the VE table has been tuned at all loads of operation, you basically have in effect the "Finger Print" of your engines efficiency(VE).
No further adjustment of VE table should be necessary.
As suggested just lower timing to compensate for the lower octane. I'm am also sure you will not be able to run the boost levels that were obtainable with Race gas, so you will have to lower the boost.
A knock detection device and/or egt gauge should help in tuning etheir with pump 93 or race gas for that matter.
The PT-88 4-bolt will bolt up, but it will actual be higher and further foward, which means you will have some fabricating to do with your inlet and exhaust system on the outlet side.
The PT 76 and PT 88 are totally two different animals, I mean you can't make a PT 76 into a PT 88. The 88 uses a totally different bearing housing, tubine housing etc. etc.
The PT 88 will definitley support about 200hp more than the PT76.
Give Harry a call, I'm sure he will fill you in on your options.
I am no longer working at PTE on a daily basis, although I am still doing some consulting work for them.
I have re-joined a previous employer of 14 yrs, as their Quality Assurance Mgr, engaged in Power Plant Construction.