GT4 power upgrades

[Ravi355]

I took delivery of my GT4 this week and was out for a long drive early this morning. I was playing with a mate who has a 992.7 GT3. Through most of the twistes there is not alot in it between the 2 cars although the GT3 definitely has better traction out of corners, but once the road opened up i was quite suprised by kust how much quicker a GT3 is. The GT4 does feel slightly limp in the middle of the rev range and then wakes up again above 5500 rpm. I know its been detuned, so theoretically it shouldnt be too hard to get 430 to 450 bhp out of it. There seem to be some full exhust and ecu sytems for sale that give a useful 10 ish percent more power. Does anyone have first hand experience of liberating some more power out of a GT4?

[BubblesNW]

Check out Ehresmann Automotive, they have done a lot of development work on the GT4. Not sure if there are any in the UK though.

[gtsralph]

I had Jens install and tune a 3.8L 991S engine in my 981 PDK Cayman S 18 months ago. Absolutely no problems, you would not know it was not a Porsche factory build.


See http://l.facebook.com/l.php?u=http%3A%2F%2Fwww.ehr...

I believe a UK GT4 has been tuned by Jens recently.

[gtsralph]

I had Jens install and tune a 3.8L 991S engine in my 981 PDK Cayman S 18 months ago. Absolutely no problems, you would not know it was not a Porsche factory build.


See http://l.facebook.com/l.php?u=http%3A%2F%2Fwww.ehr...

I believe a UK GT4 has been tuned by Jens recently.

[franki68]

Ravi355 said:

I took delivery of my GT4 this week and was out for a long drive early this morning. I was playing with a mate who has a 992.7 GT3. Through most of the twistes there is not alot in it between the 2 cars although the GT3 definitely has better traction out of corners, but once the road opened up i was quite suprised by kust how much quicker a GT3 is. The GT4 does feel slightly limp in the middle of the rev range and then wakes up again above 5500 rpm. I know its been detuned, so theoretically it shouldnt be too hard to get 430 to 450 bhp out of it. There seem to be some full exhust and ecu sytems for sale that give a useful 10 ish percent more power. Does anyone have first hand experience of liberating some more power out of a GT4?

Wait until you get owned by a 3.0 diesel estate .

[IMI A]

Speak to http://bgbmotorsports.com


they can get 430bhp + pretty economically or even more depending on budget out of a GT4. It should have really got the GT3 engine but long term may be a blessing in disguise having a stock Carrera S engine.


http://rennlist.com/forums/gt4/882246-gt4-unlockin...

[gtsralph]

I spoke extensively with John Teece at BGB before using Ehresmann. John does not have the capability to support non-USA installalations and he sells Ehresmann tunes as well as the simpler Cobb AccessPort tunes.

If you want to go the AccessPort route, try Litchfield Engineering. Iain showed me around their operation - it is very impressive, engineering based with one of best (Maha) dyno rooms I've seen outside Cosworth.

[IMI A]

gtsralph said:

I spoke extensively with John Teece at BGB before using Ehresmann. John does not have the capability to support non-USA installalations and he sells Ehresmann tunes as well as the simpler Cobb AccessPort tunes.

If you want to go the AccessPort route, try Litchfield Engineering. Iain showed me around their operation - it is very impressive, engineering based with one of best (Maha) dyno rooms I've seen outside Cosworth.

I agree re Litchfield. I was up there last week. Super impressive set up.

[v8ksn]

franki68 said:

Wait until you get owned by a 3.0 diesel estate .

Has this actually happened or are you joking?

[Porsche911R]

jens is the best route, I can upload his 981 power pdf if you like.

[franki68]

v8ksn said:

Has this actually happened or are you joking?

in a drag race vs a 335d xdrive ,or a Audi bi turbo diesel I think the gt4 would struggle.if it did win it would be a narrow margin.
I've seen a 997 c2s lose against an Audi A6 biturbo diesel in a drag race ,so these things do happen.the gt4 is just not very fast in a straight line.
Makes up for it through the bends though.

[Cheburator mk2]

anonymous said:

[redacted]

I would like to have seen the GT4 against the E90 335d running a 6-spd manual box and 414bhp, which was on track at Bedford recently. That put the fear of god in me...

[Porsche911R]

these 3L oil burner ownners are funny, they feel fast but would get owned by a GT4 and prob even my Fiesta lol

BMW 330D which seems to be a benchmark is over 14 seconds to a ton vs 9 for a GT4 !

BMW 335 Xdrive 13.6 still !!!

these figures are night and day apart

[Cheburator mk2]

Porsche911R said:

these 3L oil burner ownners are funny, they feel fast but would get owned by a GT4 and prob even my Fiesta lol

BMW 330D which seems to be a benchmark is over 14 seconds to a ton vs 9 for a GT4 !

BMW 335 Xdrive 13.6 still !!!

these figures are night and day apart

Should have gone to Specsavers... A 414bhp/420ft/lbs 335d is not a 13.6 qtr mile car... I own a GT3, which is still marginally quicker than a GT4, and yet at Bedford when we had a rolling 30-150mph I struggled to pull away from the derv...

Non remapped diesels of course have no chance against a GT4, doh!

Edited by Cheburator mk2 on Monday 3rd October 14:12

[Porsche911R]

Cheburator mk2 said:

Should have gone to Specsavers... A 414bhp/420ft/lbs 335d is not a 13.6 qtr mile car... I own a GT3, which is still marginally quicker than a GT4, and yet at Bedford when we had a rolling 30-150mph I struggled to pull away from the derv...

Non remapped diesels of course have no chance against a GT4, doh!

Edited by Cheburator mk2 on Monday 3rd October 14:12

I quoted 100mph times, I could say "Should have gone to Specsavers... " but that's a bit immature :-)

Edited by Porsche911R on Monday 3rd October 15:06

[hondansx]

But in reality it is is true. Who changes down 3 gears on the motorway?

My old man's 991 C4S cab is the worst, slowest, fattest 911 you can buy - sometimes i've been in 2nd on the motorway in Sport Plus as it rather embarrasingly attempts to move forward at a pace.

Meanwhile, the big engined diesels make no fuss and surge away. With a GT4, you'd be floundering for the right gear whilst they've already taken off.

Of course it's all silly and egotistical but..let's face it, we can all be idiots sometimes. No one is doubting a GT4 would beat most cars if in the right gear, but on the motorway you are normally in top gear. Underestimate a repmobile in ebb and flow traffic at your peril!

[finestjammy]

I've wasted hours on this site A few Porsche examples vs a 335d:

http://fastestlaps.com/comparisons/bzkbvai96a9z

[v8ksn]

Its fun to change down 3 gears!

Sometimes, all you need at motorway speeds for a little alacrity is to change from 6th to 4th with a blip of the throttle and away you go

[ags11]

I own a GT4, my wife drives a 330d.
I've never even thought of comparing the two. The cogs in my head are jamming!
I don't get this discussion!

[smudger911]

anonymous said:

[redacted]

On the money. Couldn't of said it better myself!