John Scott Posted October 1, 2000 Share Posted October 1, 2000 Practiced what I preached and put a new power valve in the 600. I had a piddly 7" in gear with the 700. The new trans gives me 4" more with 11". (in drive with the 700) An 8.5 PV is super smooth from a stomp and no hesitations anywhere. Too bad we're about to get the high oxy fuels for the winter. This will mess up everything again! JS [This message has been edited by John Scott (edited October 01, 2000).] Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted October 1, 2000 Share Posted October 1, 2000 So what do you attribute the difference to? What rpm's did you have idle in neutral/in gear setup with the 700? and now w/ the t56? Quote Link to comment Share on other sites More sharing options...
John Scott Posted October 2, 2000 Author Share Posted October 2, 2000 The 700 in gear pulled 7 in of vacuum @ 750 rpm. In neutral with the 6 speed @ 900 rpm pulls 11 in. Regardless of rpm it pulls more w/o a load in neutral. JS Quote Link to comment Share on other sites More sharing options...
MYRON Posted October 3, 2000 Share Posted October 3, 2000 I have been jacking with the jetting over the last few weeks.. My car does pull 11 hvi. and i used the 8.5PV with the 74&82 jets.. Using the gtech it went 0-60 in 5.0 sec. I wanted the 4.5 back so i tried 80x4 and no power valve. I seems to hit 2nd better, but i didnt use the g-tech yet. I blew out the collector gasket and parked it. I am going to take it in and get my headers converted to full length set up.. Myron Quote Link to comment Share on other sites More sharing options...
John Scott Posted October 3, 2000 Author Share Posted October 3, 2000 Myron, I've had runs that vary as much. If there's any wheel spin I can't make a judgement. I've also had runs I thought were killer only to find the Gtech says otherwise. I boosted up 4 lbs and lost well over 1/2 second. Spent way more time spinning the tires on my 1-2 shift. My carb is really obvious to the change. It hits a big hesitation with the smaller PV. None with the 8.5. In fact this is the best my carb has run since I put it on! I suppose every engine will have its preferences. Maybe I got lucky and found the one mine likes. BTW I like to spend lots of time behind the wheel. Drivability is an important factor as well as a quick 0-60. A better test of hp gains is run it through the 1/4. Less sensitive to a little spinning as the mph will tell you if you headed the right way. JS Quote Link to comment Share on other sites More sharing options...
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