Question about traps with TT Stg2 ...

[kosehhamashoon]

Will a TT Stg2 on an E36 M3 (not sure what boost level? thoughts?) with stock gearing and a turbo back exhaust trap anywhere close to 125-127mph?

Been throwing the idea of getting a kit lately ...

[Shuasha]

Will 75 more whp take you from a 115 mph to 125 mph? If so, there's your answer. At higher boost anything is possible, but the stock TT Stage 2 is 13 psi.

[Juicy Double]

IIRC, more likely in the 120-122 range. Any TT stg2 owners can correct me obviously.

[kosehhamashoon]

IIRC, more likely in the 120-122 range. Any TT stg2 owners can correct me obviously.

I guess with some weight reduction and some supporting mods, 125 is feasible.

Great, thanks.

[BadBoostedBmwM3]

I have seen them trap 120mph w/ only like a 2.1 60ft.

[Z3speed4me]

I would think with true slicks on upper 120's is probably possible

but street tires, or something of the sort, yea prob more like 120-122ish

[Geno325is]

did the Stage2 setup have hg and studs? bump that boost up and some meth inj :O

[Juicy Double]

tires won't affect traps too much, if at all.

[///M3 CRAZY]

I would think with true slicks on upper 120's is probably possible

but street tires, or something of the sort, yea prob more like 120-122ish

ummm. you have that backwards. the higher traps come with street tires and lower traps come with slicks.

[BadBoostedBmwM3]

ummm. you have that backwards. the higher traps come with street tires and lower traps come with slicks.

Umm, thats what i thought.

[zemaestro]

126...at 14.5 psi

[Z3speed4me]

ummm. you have that backwards. the higher traps come with street tires and lower traps come with slicks.

oops i made a boo boo.... happens :(

but i was saying that though mainly because i was thinking about grip issues

[MrBlonde]

Tire choice and short time has little if any bearing on trap speed.

[OnUrleft]

I believe there's someone with a TRM stage 2 kit that's trapping high 120's...Something around 500whp if you do the headgasket/studs on a 3.2 or 2.8. BBaz's is making 540whp stg2. Will easily get high 120's, just doesn't have the time to go test it. Rafa's car is 120+ car but it's 2800lbs w/ TRM stage 1. Beautifully designed kit if you havn't looked into the engineering aspect of it but I havn't seen much first hand with the tt kit.

[MrBlonde]

case in point i switched to a drag radial...and picked up 3mph...the drag radials where smaller thus affecting my final drive in a positive manor. most the time the comment that drag radials lower trap speeds is valid because more often than not the drag radials/slicks are taller tires than stock, thus affecting final drive in a way not conducive to acceleration.

Interesting, in my experience I've tried three different wheel/tire combinations and trap speed is always the same. My best short time and my worst short time have almost identical trap speeds.

Saying tire height changes your trap speed is like saying swapping diff ratios will result in a higher trap speed. The engine power is the same, the vehicle weight is the same but gearing makes a trap speed difference?

[///M3 CRAZY]

Interesting, in my experience I've tried three different wheel/tire combinations and trap speed is always the same. My best short time and my worst short time have almost identical trap speeds.

Saying tire height changes your trap speed is like saying swapping diff ratios will result in a higher trap speed. The engine power is the same, the vehicle weight is the same but gearing makes a trap speed difference?

it might if it eliminates a shift or allows your shift point to drop back into peak torque once in the next gear.

[MrBlonde]

its my understanding that a redline shift with 3.91s and 3.23s will result in the same rpms....as to say the diff has no bearing on the shift points.

What he's getting at is the take up RPM in the next gear after the shift. If a change in total gearing changes the RPM band your engine uses it can potentially hurt/help relative to the torque band.

In practice I always just shift at redline, I've never had an engine where shifting earlier has helped.