Discussion
boxsey said:
Yes, I've been looking into getting a set of 18s but want to try michelin super sports. However, they don't come in the recommended front size (235/40/18). I could get the super sport as a 225/40/18 but am not sure it would be advisable to run a narrower tyre? I know the super sport won't have the grip of the V70 in the dry but would prefer the super sport for wet track days. I've used the Toyo R888 for many years and got fed up sitting out a lot of the day when it was wet. Hence why I'd like to move away from a full R compound tyre. So at the moment I'm leaning towards getting a second set of 19s to take the correct size super sports (235/35/19 and 265/35/19).
I have used cup2s 235/40/18 on golf r which should be 225/40/18. Work really well so have you looked at 245/40/18s or 235 cup2s?? They are a bit scary when wet but you take your risks when pushing on track. Cat litter waiting !Barleyboy said:
I have used cup2s 235/40/18 on golf r which should be 225/40/18. Work really well so have you looked at 245/40/18s or 235 cup2s?? They are a bit scary when wet but you take your risks when pushing on track. Cat litter waiting !
Thanks Barleyboy. The cup 2 is the opposite problem...you can get the fronts for 18s (235/40/18) but not the rears (265/40/18)! However, even if they were available I put the cup 2 in the same great in the dry but risky in the wet category as the R888, V70 an DZ03. Regarding the alternative super sport size I'd choose the smaller 225 option over the larger 245 option as the latter are not recommended on an 8J rim (greater chance of them rolling off the rim).
Porsche911R said:
GT4P said:
I ran a 987 spyder before my gt4 and Iam only taking the gt4 to 4k revs as still running in but it already seems a lot quicker!
My spyder will piss all over a GT4 if you keep to 4K revs lol What a daft comment.
So will your Spyder keeping to 4k revs piss a gt4 keeping to 4 k revs ? Don't think so!
GT4P said:
Not daft at all the gt4 up to 4k revs already seems/feels a lot quicker than a 987. Spyder/ R to 4k revs! So it's going to be a hella of a lot quicker on full chat when I finally open it up!
So will your Spyder keeping to 4k revs piss a gt4 keeping to 4 k revs ? Don't think so!
That's partly because the GT4 has a down tuned, torquey engine. It's faster, of course, but probably less than you would think from pootling in each. The 987 needs and rewards revs more than the GT4, which is a shame. So will your Spyder keeping to 4k revs piss a gt4 keeping to 4 k revs ? Don't think so!
ORD said:
GT4P said:
Not daft at all the gt4 up to 4k revs already seems/feels a lot quicker than a 987. Spyder/ R to 4k revs! So it's going to be a hella of a lot quicker on full chat when I finally open it up!
So will your Spyder keeping to 4k revs piss a gt4 keeping to 4 k revs ? Don't think so!
That's partly because the GT4 has a down tuned, torquey engine. It's faster, of course, but probably less than you would think from pootling in each. The 987 needs and rewards revs more than the GT4, which is a shame. So will your Spyder keeping to 4k revs piss a gt4 keeping to 4 k revs ? Don't think so!
In terms of performance the GT4 is faster than the R (pretty obvious looking at stats), but I wouldn't say its that much faster in a drag race. The torque is obviously better though.
n17ves said:
. I disagree about the 987 rewarding revs more than GT4....okay the GT4 has a flat power band, but actually has a higher redline than the Cayman R and this still requires exploiting to extract 100% of the power.
higher red line where power falls off like a stone at 7.5k revs, the 987.2 revs out very sweet and keeps making good power to red line, I think the 3.4 is more rewarding my self, but that's only my view.A lot of dyno graphs have the GT4 peaking at 6.4k revs and the dip after that never recovers ! maybe the RAM air effect on the road works over dyno plots to show peak IS at 7.5k revs on the road.
I will Vbox both change points and see if taking the GT4 to 7.5k revs over 6.4k revs is worth it.
cobb lastest GT4 dyno peaking at 6.4k revs !!
Jens GT4 tuning program show the blue stock line again peaking at 6.4k revs, only a tune allows for the peak to move up the revs !
Edited by Porsche911R on Tuesday 29th March 12:24
[quote=Porsche911R]
I will Vbox both change points and see if taking the GT4 to 7.5k revs over 6.4k revs is worth it.
quote]
Seriously!? Even if the power did drop off at 6.4k (I don't believe it does from driving the thing), there is no way its efficient changing at 6.4k, you'd be dropping way down the power band.
Does anybody that actually has a GT4 on here actually drive the thing
I will Vbox both change points and see if taking the GT4 to 7.5k revs over 6.4k revs is worth it.
quote]
Seriously!? Even if the power did drop off at 6.4k (I don't believe it does from driving the thing), there is no way its efficient changing at 6.4k, you'd be dropping way down the power band.
Does anybody that actually has a GT4 on here actually drive the thing
peak Torque is at 4.5k revs so changing at 6.k revs drop you back nice in that Torque spread.
are you not looking at the dyno charts above !!!
the comments were the 3.4 revs out and makes power to red line the GT4 does not, hence the 3.4 is more fun to pilot.
You seem to think not, hence I posted the graphs to make a point, I think the GT4 engine feels a bit lazy myself where the 3.4 is a zingy fun unit.
The GT4 deserves the x51 upgrade imo lets hope the next one gets it.
the Vbox will be interesting imo.
are you not looking at the dyno charts above !!!
the comments were the 3.4 revs out and makes power to red line the GT4 does not, hence the 3.4 is more fun to pilot.
You seem to think not, hence I posted the graphs to make a point, I think the GT4 engine feels a bit lazy myself where the 3.4 is a zingy fun unit.
The GT4 deserves the x51 upgrade imo lets hope the next one gets it.
the Vbox will be interesting imo.
Edited by Porsche911R on Tuesday 29th March 13:40
J-P said:
My car is due its 4 year service next month.
Any idea what the cost of this should be? It's the major one, so I'm expecting some damage to the wallet but hopefully not too much!
CircaAny idea what the cost of this should be? It's the major one, so I'm expecting some damage to the wallet but hopefully not too much!
£600 major
£195 Brake fluid
£200 AC refresh
£350 spark plugs.
Don't forget the MOT £55
there are talks to be had on costs of course and discounts.
Porsche911R said:
peak Torque is at 4.5k revs so changing at 6.k revs drop you back nice in that Torque spread.
are you not looking at the dyno charts above !!!
the comments were the 3.4 revs out and makes power to red line the GT4 does not, hence the 3.4 is more fun to pilot.
You seem to think not, hence I posted the graphs to make a point, I think the GT4 engine feels a bit lazy myself where the 3.4 is a zingy fun unit.
The GT4 deserves the x51 upgrade imo lets hope the next one gets it.
the Vbox will be interesting imo.
I did look at the dyno, but it doesn't represent the official Porsche one or indeed the way it drives. And as you said previously, Id question the validity of it.are you not looking at the dyno charts above !!!
the comments were the 3.4 revs out and makes power to red line the GT4 does not, hence the 3.4 is more fun to pilot.
You seem to think not, hence I posted the graphs to make a point, I think the GT4 engine feels a bit lazy myself where the 3.4 is a zingy fun unit.
The GT4 deserves the x51 upgrade imo lets hope the next one gets it.
the Vbox will be interesting imo.
Edited by Porsche911R on Tuesday 29th March 13:40
You do know torque is simply the rotational force produced by the engine, and is in fact HP (force) that's delivered to the wheels - acceleration = force/mass (Basic physics
). Anyway, I'm not here to argue stats. I'm more than happy with the GT4, and I would in no way would consider downgrading back to the R (as good car as it is). The GT4 is just better in everyway (apart from the electric handbrake & price tag!).
n17ves said:
and I would in no way would consider downgrading back to the R (as good car as it is). The GT4 is just better in everyway (apart from the electric handbrake & price tag!).
I have just bought another R :-) as it happens , as I don't think the GT4 is better in every way , or if it is , not for the right reasons ! I think the R has a nice sweet spot for road use.I don't see it as a downgrade at all, more a side ways step depending how you want a car to feel. both have big plus and minus points imo.
I have not sold the GT4 as I love that also, but I had to have another R it's a great platform.
Gassing Station | Boxster/Cayman | Top of Page | What's New | My Stuff