What a difference a proper converter makes. *DynoGraph*

[ebrow21]

Background on the car.

06 Convertible 4klb race weight.
Jlt110, CMDP, O/R X, UDP, 4.10's, GTB's, BBR Stage 1 cams. The car also has a HSW plate kit with a Nitrous Express stand alone fuel setup (running C16). I am running a 125shot. I went from a 4k upgraded single disc (not stock core) converter to a 3.6k triple disc.

Same dyno, same shot size, same fuel, same tune, same bottle pressure. The lower hp graph was not the final tune (changed the fuel pressure at the pump to lean it out some). The operator couldn't find that graph, but the final number was 393hp/390tq. Best time on the setup was 11.70@ 115.5 +750DA

The more recent N/A graph (not shown) was down 8hp (300hp before, 292 after), which I assume was from the weather, so take that into account as well. Both converters were able to stay in lockup N/A. Nitrous, on the other hand, was a different story. I stopped the Nitrous about 6k both runs.

The midgrange gains from lockup were what I was most impressed with. 50+hp/50+tq right where it shifts from 2nd/3rd and from 3rd/4th. With my lockup tune I hope to see a pretty nice gain quarter mile wise. I'll update when I get a chance to make it back to the track.

 

[stkjock]

Pulls should have been done cked in 4th gear.

 

[ebrow21]

Pulls should have been done cked in 4th gear.

All runs were locked in 4th. When I said same tune, I should have specified same dyno tune.

 

[stkjock]

The midgrange gains from lockup were what I was most impressed with. 50+hp/50+tq right where it shifts from 2nd/3rd and from 3rd/4th. With my lockup tune I hope to see a pretty nice gain quarter mile wise. I'll update when I get a chance to make it back to the track.

 

[confuzed]

I'm sure he can answer later, but he mentioned the shifts feel more solid under WOT. Was only dynod in 4th

 

[Swarzkopf]

I'm guessing the power pulls were done in 4th, but they made a couple of full 1/4 mile passes on the dyno to datalog for tuning.

 

[ebrow21]

I datalog all my track runs (and have some from a very similar setup to what I have now). From those datalogs, the previously mentioned rpm is where the vehicle shifted during a quarter mile pass. Hope that helps clarify.

I did not do a quarter mile pass on the dyno. The 11.70 pass was done at the track, with the first converter.