When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Performance, Tuning, and (LEGAL) RacingPost discussions about increasing performance, capabilities, and racing.
****WARNING**** Street racing or illegal activities will be removed and potential bans will
be handed out.
Made a trip to the track for Saturday night Fun-n-Grudge. I think there's still a tenth or two in it to be gained. I'm in the left lane.
Not the best pic, but that's an 11.89 @ 116mph. I can't help but thinking that a set of 4.56 gears would easily net a tenth or two, since it's shifting into 4th about 150ft from the finish line.
Made a trip to the track for Saturday night Fun-n-Grudge. I think there's still a tenth or two in it to be gained. I'm in the left lane.
Not the best pic, but that's an 11.89 @ 116mph. I can't help but thinking that a set of 4.56 gears would easily net a tenth or two, since it's shifting into 4th about 150ft from the finish line.
Nice run! No question now, you are in the 11's.
But can we make a bet you don't gain a 10th with a gear install? Once you start making more power it'll shift into 4th earlier in the run...but if you go 4.56 gears you'll be right back in the same position with more power and too much gear. Try a 72mm pulley before you spend the money on gears, should be no problem with the Boostane you run.
Nice run! No question now, you are in the 11's.
But can we make a bet you don't gain a 10th with a gear install? Once you start making more power it'll shift into 4th earlier in the run...but if you go 4.56 gears you'll be right back in the same position with more power and too much gear. Try a 72mm pulley before you spend the money on gears, should be no problem with the Boostane you run.
If I do the 72mm pulley, I don't think Matt will tune it unless I do the bigger bump and injectors, could be wrong though. I think staying with the 75mm pulley and under 11 lbs of boost keeps the motor at least a little south of the ragged edge. In the short term, the gears are cheaper and it will be easier on the drive train.
Pretty sure I'm going to do the gears. There's a lot of room imho for more power even with the 4.56's, as it's crossing the finish line at about 6200 rpm only. I plan to leave the shift points alone so the only thing that should change is getting into 4th gear a little sooner and being able to wring it out a little further in 4th. Without doing a torque converter I think it's the best way to get another tenth out of it in the current configuration.
06-02-2019, 02:24 AM
Running better, Fun-n-Grudge
