5280_GT3

If you want to pay the difference in cost for me I'm totally on board

Smoking Rotors

This with 19" wheels, a shaken down alignment, 100 octane, and a fresh set of Hoosiers will be as fast as just about any tuned GT3.

Perimeter

Has anyone found 513hp to be insufficient?

rodsky

Me

Jokes aside, at a mile up, there's a noticeable drop in power (NA especially). Having said that, i would be hesitant to tune a NA Porsche car that revs to 9000 RPM. I'd improve power to weight by reducing weight (battery, wheels etc.), Dundon headers, exhaust etc. That way you get a little more HP, no/minimal risk, and a better weight/HP ratio. I'm a fan of tuning turbo cars and i did mine - 20 months ago. But that's a whole different ball of wax.

sechsgang

I would be nervous to tune a 991.2 gt3 motor given how strung they already are and the fact that even with 20 hp not sure what thats' worth vs having stock warranty. Granted for turbo cars...I've done it a few times because thats a LOT of new HP to play with even on conservative tunes 😂

Drifting

agree. I’d never tune a 991 GT3. Just asking for trouble.

Do headers with side muffler delete, lithium battery, 19in lightweight wheels, and you’ve optimized everything worth doing and in a safe way you can enjoy for years.
And you don’t have too worry about blowing your engine and then getting denied for a warranty claim.

SDGT3

Really no reason to mess with tune unless you want a quick way to get your warranty denied. It is not meant for drag racing so just learn how to drive it faster. Most folks don't even use 8/10s of cars performance.

Jbravo23

GT3RS 520hp
GT3 493hp

only difference is map. You’re not doing anything more than what’s already been done. adding tune to GT3 will put you where the RS is. It’s really not that serious.

how did those non tuned 991.1 motors work out?

rodsky

Different issue for 991.1. Design flaw on finger followers etc. They could have had 450 HP and there would have been issues.

Hey if you're comfortable tuning for 20HP - that's entirely up to you. For me - I wouldn't do it for a bump that you will hardly notice / won't notice. And you could get more "power" by simply reducing weight / then adding Dundon in stages if need be. Thats what I would do - purely my opinion.

Jbravo23

its not necessarily the peak hp I was interested in, but the lack of power in low rpms. Only negative I had about the car. I rarely if ever get to 8k. Not enough road. The tune helped with that lack of power down low it was noticeable right away. After that I added dundon street headers. Felt no difference, hp gains were very small (8hp) that was with the stock center. Just received the LOUD center from dundon two days ago and installed yesterday. I swear my butt dyno is telling me the car has even more giddy up in lower rpms. Could be in my head but it’s definitely breathing better now. I’ve also shed over 100lbs.

Jamie@dundonmotorsports

Depends on the car, on the 991.2 the engine is the same between the GT3, RS and Touring. Nothing different. So the touring responds the best to an ECU tune, the RS the least.

We do have a way to make a cloned ECU so that you can swap it back and forth and not void your warranty. It's good on it's own but is part of a forthcoming package including further intake mods for big gains. We're also have 4.6 and 4.8L engine builds for the 991.2 cars on the 6-9month horizon.

GrantG

Will you have to lower redline for the big displacement? Do you expect over 600hp?

Jamie@dundonmotorsports

yes over 600hp, and no need to reduce redline as the valvetrain is setup to handle the speed and the masses in the rotating assembly are less than stock...

Jbravo23

🙀

Drifting

agree the only difference is map. However your quoting the wrong hp numbers and incorrectly increasing the HP difference between the RS and the GT3.

RS is 520 hp but GT3 is 500 hp.

if you use bhp values then RS is 513 and the GT3 is 493.