Converter upgrade worth it?
That's how hi-stalls work. They slip more, to get to where the power starts. Cuz your engine has a fair bit more power at 3000 versus at 2200.
At just 140 psi cylinder pressure tho, I'm surprised you didn't call the bottom end soft. I would have thought the 3000 would be the instant cure with 3.55s.
You know, that with a 3000TC you can, or probably want, to reshape your timing curve, and open the secondaries sooner. Before you pull that TC out, I would highly recommend a retune.
Ok,thanks. It runs great, just sluggish acceleration from 20 to 40 or unless push hard enough to downshift, then it's like switch on. I'll make a call or 2 to a converter company.
In second gear;20 to 40 is 1360 to 2720 zero-slip; at Part Throttle before KD, say
1430 to 2860. So this is right in the sluggish zone for that 268 cam and 140 psi cylinder pressure.
At KD into first gear, now WOT, this might be
2570@20 going to 5140@40;so, I get your disappointment. In second gear, if your engine is soft (140psi), then that new TC is not gonna make a huge difference. And at KD even less, because the engine is already at 2570@20 mph, and that soft bottom-end (140psi), is not gonna react with fury. By 24 mph, the Rs would have already been over 3000 with the old TC.
The problem is not the TC, but rather; A) the 140psi and/or B) the 3.55 gears which lock you into that soft 140psi zone, and/or C) that 268 cam with it's late-closing intake, that is creating the soft 140 psi together with the low Scr.
The cheapest fix is more rear gear, like 4.10s, which would get you, about
2970@20 going to 5940@40 in first @WOT, and,in second at PT; from 1680 to 3360.
The proper fix is more cylinder pressure, like 155/160 with open-chamber iron heads.
I like that 268 cam, but it is a principle player in the low cylinder pressure. And really, it power-peaks up near 5300, and wants to be shifted at around 5600, so if yur not going there..... then there is not much reason to keep it. A smaller cam will get you more pressure, and more torque and more performance below 60 mph, cuz right now 5500 is ~46 mph in first/76 in second, and should be spinning 25s all the way thru first, but at 140 psi, I bet it can't.
That's my opinion
That cam wants about 9.8Scr at your 950 ft elevation, Which would increase the VP from around 117(sick-teener) to 140 ( sick-fun)
Read about VP here;
V/P Index Calculation
