Cayman GT4 Is it quick enough?
Discussion
bigmowley said:
Forget the 911 "power kit" type options. Whatever we do has to be bespoke to the Cayman due to the compact nature of the install esp on the intake side. There should be no need to delve inside the engine, the cost benefit ratio goes out of the window at that point. A properly developed intake, with a big throttle body along with a retuned exhaust to match and a thorough remap will be just right. It's not the work of a moment as there will be much work avoid any holes in the torque curve, not easy on these engines, hence the very complex standard variable geometry intake system. But on the plus side the variable valve timing is nice and adjustable. The standard engine cover may need to be "adjusted" as it's mighty tight under there.
Once someone has done the development work it should all be bolt on and enjoy a 420BHP GT4.
Once someone has done the development work it should all be bolt on and enjoy a 420BHP GT4.
bigmowley said:
It's a dreadful chassis that lets go so sharply at the back that it's almost impossible to drive at the limit. Not my cup of tea.
My S2000 was a little twitchy, but it may have just been that it was my first RWD car. It didn't feel excessively sharp - I think the main reason it got such a bad reputation was that people were probably pushing on in second at 40mph, 3rd at 60mph etc when the engine suddenly came on cam, gave the rears an extra wallop and broke traction.
Nice garage there.
For what it's worth I always thought the s2000 was such an underrated car to drive. It's bloody awesome IMO just way too cramped inside so much so that some scoooching was done, leg tickling on steering lock and is so tight for space under the non adjustable steering column no heel & toe possible!
eddy-x4hps said:
Rob at DMS sorted my GT4 for just over a grand and it runs at 435 BHP he did say we can get some more power by changing the throttle bodies for anyone that is intrested!! cheers Eddy
I for one don't believe you can get that much power for such little outlay ! The throttle body would need to be changed for starters as that will still restrict engineJens who seems to be class leading in the gt4 remapping gets 406bhp
435 bhp is dreamland ,but then DMS figures have always been dreamland.
I have seen them quote and some one here had a R done by DMS and massive claims, he took it to Surrey RR and his real gain was 6bhp lol.
DMS figures are way way out.
435 bhp is dreamland ,but then DMS figures have always been dreamland.
I have seen them quote and some one here had a R done by DMS and massive claims, he took it to Surrey RR and his real gain was 6bhp lol.
DMS figures are way way out.
interesting rereading this thread now i have done 1100 miles in the car. The gt4 is plenty quick if one is looking at the speedometer but the lack of oomph at the top end of the rev range past 6k ish rpm (certainly compared to a gt3) and the car being really pretty detached compared to the 7gt3 makes it feel considerably subdued compared to what one expects of a GT car at high revs. Shorter gearing would not do anything to solve the issue imo as you'd just be sat at the 'flat' part of the engine rev range more often.
ChrisW. said:
I think it's a great value for money package --- and hopefully an inexpensive car to track --- but the engine is based on a road car rather than a racer ---
But was not early porsche cars that were raced were basically the road cars thus using the same engines as the road cars and only since the introduction of the gt3 in 1999 has a completely different engine been used!Also the gt4 is now raced with same engine in the track only club sport!
isaldiri said:
interesting rereading this thread now i have done 1100 miles in the car. The gt4 is plenty quick if one is looking at the speedometer but the lack of oomph at the top end of the rev range past 6k ish rpm (certainly compared to a gt3) and the car being really pretty detached compared to the 7gt3 makes it feel considerably subdued compared to what one expects of a GT car at high revs. Shorter gearing would not do anything to solve the issue imo as you'd just be sat at the 'flat' part of the engine rev range more often.
Without comparing it to the gt3 mine definitely picks up at the top end of the rev range.HokumPokum said:
bespoke engine great until it breaks. cooking engine is cheaper to replace. Isn't that the issue with PCCB? everyone moaning about replacement cost?
Mate going through engine rebuild on his 996.1 GT3. Due to huge amount of Ti parts, replacement cost of components is ludicrous. franki68 said:
isaldiri said:
interesting rereading this thread now i have done 1100 miles in the car. The gt4 is plenty quick if one is looking at the speedometer but the lack of oomph at the top end of the rev range past 6k ish rpm (certainly compared to a gt3) and the car being really pretty detached compared to the 7gt3 makes it feel considerably subdued compared to what one expects of a GT car at high revs. Shorter gearing would not do anything to solve the issue imo as you'd just be sat at the 'flat' part of the engine rev range more often.
Without comparing it to the gt3 mine definitely picks up at the top end of the rev range.But it flattens out right at the top end.
By comparison the Mezger feels like it could rev to the moon and back. The limiter always feels like it's at least 1000rpm to low. And it has SO much character.
When I got the GT4, I didn't want to like it. It wasn't a GT3, it wasn't a mezger.
I took the GT4 and a 6GT3 to Silverstone for comparison drives. First session in the GT4 and I came back to pitlane with the conclusion that the GT4 wasn't the real deal, the engine just isn't the same - runs out of puff 1000 rpm too early. Not motorsport enough. Steering feel was good but somewhat numb at the limit of corner grip.
Second session in 6GT3 (w/stiffer springs than oem) was perfect
Third session back in the GT4 and I started to appreciate the areas where it was strong - compliant but firm suspension, phenomenal brakes, absolute pace (though the track setup 6GT3 when driven hard matches the std GT4 for pace)...GT4 likely to get quicker with track geo, and geo should also help the mid corner steering numbness.
...So now some 2000 miles later I do have renewed respect for the GT4. It is a great package and does everything rather well. Yes, it isn't the same raw analogue experience of a 6GT3, but it does other things extremely well. I'm even quite used to the different engine character...and it works in the GT4.
...so, we should celebrate both cars - they are not the same but each great at what they are designed for (6GT3 more of a track going road car, GT4 a do it all car). In fact Porsche is one of the few mainstream manufacturers that makes cars which give us the opportunity to experience the best roads and tracks in the world!
Is it quick enough? In my view given the price point, it definitely is quick enough to scare you at the best tracks, and that is quick enough.
I took the GT4 and a 6GT3 to Silverstone for comparison drives. First session in the GT4 and I came back to pitlane with the conclusion that the GT4 wasn't the real deal, the engine just isn't the same - runs out of puff 1000 rpm too early. Not motorsport enough. Steering feel was good but somewhat numb at the limit of corner grip.
Second session in 6GT3 (w/stiffer springs than oem) was perfect
Third session back in the GT4 and I started to appreciate the areas where it was strong - compliant but firm suspension, phenomenal brakes, absolute pace (though the track setup 6GT3 when driven hard matches the std GT4 for pace)...GT4 likely to get quicker with track geo, and geo should also help the mid corner steering numbness.
...So now some 2000 miles later I do have renewed respect for the GT4. It is a great package and does everything rather well. Yes, it isn't the same raw analogue experience of a 6GT3, but it does other things extremely well. I'm even quite used to the different engine character...and it works in the GT4.
...so, we should celebrate both cars - they are not the same but each great at what they are designed for (6GT3 more of a track going road car, GT4 a do it all car). In fact Porsche is one of the few mainstream manufacturers that makes cars which give us the opportunity to experience the best roads and tracks in the world!
Is it quick enough? In my view given the price point, it definitely is quick enough to scare you at the best tracks, and that is quick enough.
While i fully agree with some of the posts above, ie that the gt4 is really very capable car especially at the price and it definitely is fast enough pace wise on track. I would without a 2nd thought however have given up a second or so of outright pace on track for more of the GT car feel of the past pre 991 (even leaving the engine top end aside). Perhaps that was an unrealistic expectation for the gt4 to be the current successor of the 7gt3 though.
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