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Rev it up to 5000rpm and pop the clutch. You'll find an answer.

Shouldn't be the case. Physically the exhausts are the same outside of the tips, but the Bullitt has a burble tune(adds pops and backfires) in Sport and Track modes that the regular GT doesn't.

Probably the last thing I'd put on a Bullitt is a spoiler.

Only things I can think of that are left are a vacuum leak or something internal. Maybe a compression or leakdown test is in order.

That's what I thought. Sounds like a squeak, not a knock.

Glad to know I wasn’t the only one going for the budget Aston angle. 😅

I’d imagine ported heads and cams would get you there but don’t know if it would pass CA inspection.

Very, very quick. Not LMP2 fast but quicker than the old GTEPro cars were when they last ran there. Definitely more time in it, his 7-8-9 complex was a bit off.

1:34 is pretty quick. Nice lap!

I think the earlier dyno was an anomaly. I didn't feel any difference on my own car.

The 991 isn't 35 years old.

I guess. 😅 When I had my new wheels/tires installed, the shop had them set at 38 and it felt like I was riding on concrete blocks. Can't imagine it being even higher than that.

I agree. I'm just saying, they aren't any lesser in straightline performance than any of the modern muscle cars.

Judging from what I've read on Rennlist, a good bit higher but you should know what you're getting into. Worth it to me. At the extremes of high performance use, they hold together better than anything else out there.

Porsches aren't any slower for the most part. A 992 Targa 4S will do low 11's in the quarter. Even a heavy 991.1S Targa will trap about the same as the Bullitt. Let's not even start with the real Turbos. Low 10's/high 9's bone stock. Anyway, I don't blame OP. Any time you have the chance to...

Why run the tire pressures that high?

Looks great. Much better fit than the GT500 bumpers I've seen.

I went from the stock 255/275 setup to a 285/295 recently. Haven't noticed much difference in straightline traction but understeer has been reduced significantly.

I've made a few mistakes driving higher powered RWD cars and in almost all instances, I'd blame my ham fisted driving over the car. Doesn't mean the car is faultless(some cars really do have a tendency to bite, I wouldn't say the S550 qualifies), but most of the time a car just doesn't do...

Cold weather + abrupt throttle + steering input = tire spin and yaw Maybe some suspension parts would help but this sounds more driver related.