2.2 STR vs. 2.5 STR
11-15-2007, 05:18 PM
#1
2.2 STR vs. 2.5 STR In general what seems to be the difference in efficiency up top between converters with these two STR's? I have 330rwhp so Im just curious how much hp up top I would be losing with going with a converter such as a Yank SS3600 with 2.5 STR versus a SS3200 with 2.2 STR or would the difference be minimal? Kinda stuck because I want the higher stall speed and shift extension for the track but more rwhp for racing on the street but if the difference is minimal I'd go with the bigger converter hands down.
Also...anyone know the STR of a Vigilante 3200 converter?
Also...anyone know the STR of a Vigilante 3200 converter?
Last edited by StealthFormula; 11-15-2007 at 05:30 PM.
11-15-2007, 08:26 PM
#2
You need to set it up so you can lock up the converter under WOT, then you can have the best of both worlds.
Most of the Vigilantes are 2.5STR from what Jack told me the other day when I ordered a 5-disc lockup.
Jim
Most of the Vigilantes are 2.5STR from what Jack told me the other day when I ordered a 5-disc lockup.
Jim
11-15-2007, 09:27 PM
#3
The higher shift extension of the SS3600 would offset any loss due to the higher STR compared to the SS3200 IMO. Higher STR doesn't always mean it's going to be slower from a highway roll either. My old SS4000 with a 2.6 STR pulled okay from a highway roll, but my current PT4400 with a 2.5 STR pulls so much harder at the same speed. It is significantly faster from a roll now. I would attribute that to the higher shift extension and the fact that it flashes so much higher when you hit the throttle. Either way, the difference between the two was night and day. I'll never go back from a PT series now. And it still hits hard at the track. That's the best of both worlds IMO.
11-21-2007, 03:00 PM
#8
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Regarding the STR I can tell you than my SS3800 dyno's 40 RWHP lower than when locked. My 3800 has a 2.55 (I think) and a shift extension of about 5300-5400 on 3.23s. I think you should go with a SS4000 (since it looks like you're interested in the SS-series) because you'll likely only wished you'd gone bigger after driving around in that small stall after a while. My brother was running easy 12.2s with intake, exhaust, 3.73s, SS4000, and a tune in bad weather. I think his best 60' was around 1.65 or something. I've run similar 1.6Xs with manifolds with my SS3800 so I don't think you'd be unhappy.
11-21-2007, 09:05 PM
#10
I gained 25hp when locking the Vig3800..To answer the ?, I think there would be a big difference between 2.2 & 2.5str..I posted in another section about this..I had a vig3800 2.5str & went 12.21@110 1.66 60', switched to a Yank SS4000 2.6str..went 12.06@110 1.59 60' same track, same conditions, same mods..The 2.6 hits like a **** out of the hole.
