Live Steam

Your 911 isn't a stoplight dragster. It's a turn carver. Run it at high RPMs and have some fun or buy a Hellcat for zero to sixty times.

VelocitasAngelus

yeah I’m off today and all weekend love to meet I’ll let you drive mine get your opinion. I send you a pm

VelocitasAngelus

that’s not the point dude. Porsche wouldn’t lie about their numbers, this tells me there is probably something wrong with the car. Also I started out on motorcycle then mustang then a c5z06 then a c6z06 stock then modded that to 687whp natural aspirated then my c7z51 stock then modified. I track my cars for fun at road courses and run them fast on back roads once a week or weekend with friends. My point is a got a lot of seat time most of it non drag because I like cars that can turn as you can see from my other cars. But in my humble experience I never had a car that didn’t meet oem numbers or were at least really close. Example my c7 did 3.8 just like gm says. After headers and tune it ran 3.6 without doing a no lift shift just babying the thing. So although I’m not a quarter mile guy and wouldn’t buy a hellcat. I do see the merits of testing the car in a quarter mile see if it’s doing oem spec numbers because that is the measure of performance used by the industry to keep a level field where you can compare cars. My car is off my more than one and a half second from Porsche claims. That’s an eternity in drag racing. It’s putting down numbers my mustang used to when I was a teen. No way this is normal I just want to verify before I drop it off at a shop since I’m new in town and don’t know the shops around this area.

PorscheAddict

I think this is a legitimate concern to have, and you sound completely competent at launching and driving a manual car, but why not use numbers that are not based on that to remove the variable? Even with a crap launch the trap speed should be in the right ballpark. What is it trapping in 1/4? Could also look up 6-130 times or something for that car to compare. That car should be trapping around 115mph (give or take a mph or two).

jfischet

i agree you should be able to get a better number than me at sea level.,, at least as good.

i wonder what your air filters look like. maybe it was driven in a dust storm and they are all clogged. wild *** guess from a desert guy.

Bud Taylor

plugs and coils or just plugs ?

VelocitasAngelus

yes I concur about trap speed and the S model per motor tend should trap 119 and that sounds right to me too. My C7 corvette trap 120 my C6z06 trap 125-127 when it was stock if I recall correctly. So 119 mph trap for the 991 is what I expected but I trap 111 mph on my best run out of ten runs, 109-110 mph trap for all other runs.

PorscheAddict

Interesting. 109-110mph does not sound right for a 991.1S. No idea what is causing the issue, but it sounds down on power. C&D got 111mph out of a base 991.1 manual.

AdamSanta85

Throw it on a dyno, should be somewhere ~360whp.

I've used a Dragy a few times on my 991.1S PDK with some mods and my best time was 12.20 @ 113 in less-than-ideal conditions

VelocitasAngelus

no it’s a good guess I changed the filters before I did the runs. They were dirty but nothing crazy. I put in a bmc filter new spark plugs changed all fluids. Ran 6 runs then Softronic tune ran 4 runs. Feel better throttle response after filter and tune but times were the same. I think something has to be taking power off.

VelocitasAngelus

I called a shop they haven’t called back I would dyno it if I can find a place. It feels week it should pull harder. 12.2 is good it’s just above what Porsche says. I’m not off by a tenth I’m off by almost 2 seconds lol. Thanks you for your input.

VelocitasAngelus

just plugs bmc filter all fluids and Softronic tune.

VelocitasAngelus

yes I literally told my buddy last night it feels like a regular Carrera not an s it feels way down on power even for a regular Carrera. He says maybe they swapped the motor. There is no record of that in the maintenance records carfax so highly doubt it. Also seems like a lot of work you have to redue the computers too. It just feels like it’s down 70-80hp it feels like a 300-320hp car instead of a 500hp car

mwho

My 991.2 (C4) felt sluggish + wasn't showing any boost. Eventually it threw an O2 sensor code mind you.

It turned out that the actuator arms on both my turbos were stuck. They sit right beside the rear tires, exposed.

On the 991.1s they were fully exposed. On the 991.2s they tried to put a flap to partially cover them (what I had on my car). Now on the 992s they are fully encased.

HardRider

991.1 don't have Turbos. I think you nailed it, find a dyno and run it. I know my base 991.2 isn't quick but is very fast, meaning above 70 mph with rpm's in the upper end it rips. 991.2 base with tune would walk around my Superformance Cobra at 150 mph and I would be listening to music, the Superformance I would be listening to my last rights lol....