DM993tt

I took my 993TT to a Dyno to see what it would do. I brought it to the shop, disconnected the 4WD coupler and strapped it down. I did 3 pulls and the highest number that came up was 324rwhp at 6000rpm. Torque peaked at 329 at 4600rpm.

The car has 48K mi on it, leaked down great a year ago, has newly rebuilt K16's K&N air filter, Fabspeed bypasses and a Turbo "S" ecu. With this setup, itt should make about 425-430 at the crank or about 350 at the rear wheels (-17% drive train Loss). I was south of that number, I was thinking it would be come in at the 340-355 range. But I wasn't totally shocked it came in where it did. I know my cats are probably a little jammed up, I am putting in some new plugs and distributor cap/rotor and some other 45K service items which should help. I think if I did that and put in some 100cell cats or cat bypass it would be up in the right ballpark. (I just don't know if I'm ready for it to be that loud). I have to think 6000 rpm in 4th gear definetely benefits from 100mph+ air flowing over it - rather than in a garage with a couple of fans too.

The A/F ratio looked to be spot on where it should be. I video'd it and may post it soon.

Kevin

This is a good thread for comparison.

https://rennlist.com/forums/showthre...ght=dyno+993TT

DM993tt

I guess that puts me pretty much in line if a dead stock 993tt with 36Kmi is sub 300rwhp and your stage 1 is 362rwhp. If you overlay the graph in the previous thread, I'm a pretty good midpoint (324rwhp and 329torque) to stock and your stage1 with just an 'S' ecu and FS bypasses and K&N afilter. I think with a new MAF distr. and rotor and plugs (and cats for sure), I could narrow that gap a little. I guess thinking 350rwhp was a bit optimistic after seeing that graph again.

sfbanchs

so with this # you should be at 390 flywheel hp, i am sure you ll be right where you should be once you get the car sorted, makes me curious as to where i am with mine

Red rooster

And intake air temperature / Barometric pressure was ?

Just so you are comparing apples with apples !!

Geoff

DM993tt

Temp was about 55 degrees - and it was rainy out - that's as good of a measure as I got here's the vid. http://video.google.com/videoplay?do...66287884&hl=en

911addict

Why is the f/w power so low on all your dyno readings, when Porsche quote 408bhp for the 993TT?
Or am I missing something?

bb993tt

I believe the number quoted by Porsche is at the flywheel. What's being quoted here is at the rear wheel.

911addict

DM993TT says in his second post that standard is 300 (wheels) which equates to 361 (crank/fly) allowing for 17% conversion. Or is the UK 993TT higher power (408 crank) than the US?

(A UK 965 3.6 standard is 360 at crank, so equiv to 299 at wheels, the same as quoted above by DM.) Confusing?

DM993tt

No, 408 is US as well, mine is stated at 424 at the crank. All the rear wheels results minus the 17% that I have seen are much lower. A stock one from Kevin's attached thread came in at 297 RWHP. Same guy did Kevin's stage 1 and hit 361 RWHP - nice change but ~$12G. My car came in at 324 with an "S" which loosely translates to 390+. Goes to show you that wheel dyno's are good for measuring pre/post upgrades, but as a comparison to factory crank numbers the rear wheel HP doesn't necessarily translate too well when you subtract the approximated 17%. I think for air cooled turbo cars which respond better to dense/cold air and the benefit gained from 100mph of cooling air over the oil cooler and intercooler also do not respond as well to a dyno shop with a couple of fans either. I think it would be a safe assumption that dyno results in moderate conditions on a RWDyno aren't going to be an exact 17% drop over the stated numbers on your turbo, whether its new or 15 years old or anywhere in between. Try your 965 3.6 with stock boost and let us know.

911addict

I'm hoping to get mine dyno'd next week. Its actually a 3.3 but has some mods so expect it to be around 370bhp crank. We'll see.....

Kevin

What you really need to do as a fair comparison is to load up you Stock ECU and do a bench mark run..

"Kevin's attached thread came in at 297 RWHP. Same guy did Kevin's stage 1 and hit 361 RWHP - nice change but ~$12G."

That quote is incorrect... Stage 1 which includes, Cats, turbochargers and programming = $6,800.00 not 12K..

Greg H.

Hey, I think I paid more than that. No wonder you are so nice to me.

Greg H.

Kevin

Greg, I edited it for you.. Stage 2 is another topic.

Jean

lol! This is a funny one