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Looks like it might get into valve float at around 6450. Until i drew a line on the graph, i didn't notice that rpm leveled off in 1st gear before you let off the throttle. It pulled clean to just below that in the other gears...
Nice times man. Your car runs very strong for what's done. Keep at it and your definitely going to get 10's with how she sits. I'll be looking forward to meeting you here in the next few months hopefully.
Thanks man, I'm hoping it has enough in it to run 10's on 93 pump gas. I'm looking forward to hanging out and seeing your car.
Originally Posted by weedburner
Looks like it might get into valve float at around 6450. Until i drew a line on the graph, i didn't notice that rpm leveled off in 1st gear before you let off the throttle. It pulled clean to just below that in the other gears...
I'll have to look again and see how high I rev'd it in first. On the dyno years ago with the worn out original springs it pulled to 6200 without showing float.
Originally Posted by 98_WS6_M6
Great runs. Good info in this thread already. Definitely be following progress.
Thanks
Originally Posted by big hammer
Have you tried revving or higher? Mine actually liked 6300-6500 if it wasn't floating
I tried revving higher with the gto t56 before, it looked like it lost some et and a little mph diring tge one time I remember.. It wasn't a good enough test because i didn't run it a bunch of times to see. That's something I want to try again tho.
Yeah its amazing it drops that much rpm that quickly right at the hit. The 2.97 1st gear in the gto trans I ran for a while worked well, I could keep it above 5000 rpm with a 6000+ rpm launch. But the rest of the gearing of the gto trans is crap with my car.
Can you go into more detail on this? I've often wondered if anyone has tried a back to back on this or atleast a similar car. What were the et/mph differences?
First one is the 11.29 run I had years ago with the gto t56 and the second one is the run 11.42 run this past weekend, I blew them up better for visual but could not get the numbers enlarged and more of the reference lines for the numbers
You can see the big difference in rpm drop from gear to gear of the gto gearing vs the fbody gearing. I couldn't really say if there was much of a difference in et and mph as I didn't test it back to back. One thing that can be clearly seen is the difference in bog on the launch and the higher I launched rpm wise the better the et was with the gto trans.
The fbody trans when I ran in true street this year at one race I launched at 5000 rpm I ran a 12.09, I needed a better et to average out so I launched off the stock rev limiter which was 6800 and ran a 11.89, needed to run slower so I launched at 5000 again, car ran a 12.096 on that run. As you can see how big of a difference it makes in how high I launched with the fbody t56 also.
If not then that may be the hot ticket. It would allow enough slip to possibly bridge the line between the 2 trans on the shifts.
I haven't used it with the gto trans. I had to pull the gto trans out of the car a couple years back because it got stuck in 5th gear. The synchronizers are worn out in it also.
One of the big reasons I don't like the gto trans gearing is because of the rpm drop to 2nd is not enough. I'm shifting almost right after I get into 2nd. Then going into 3rd and 4th is a big drop in rpm.
It would be nice to try it out and see what it would do both transmissions.
I noticed how short 2nd was from your data. It's a shame it's not just a little longer. I wonder why they did that.
If you calculate what it should drop down to, it is on down in the 4xxx's but I think I'm spinning the tires a lot right after I let back out of the clutch.
01-17-2017, 09:07 AM
