GT86, is there any truth in the rumour...
Discussion
...that these are only making about 175 BHP on a rolling road at the flywheel?
Has anyone got one and stuck it on a rolling road. I find it hard to believe they
are making onl 175 BHP, tbh, as any 1200KG high revving n/a car doing 0-100 in under 19 seconds (as in the autocar road test) would surely need 185-190 BHP minimum wouldnt it?
Has anyone got one and stuck it on a rolling road. I find it hard to believe they
are making onl 175 BHP, tbh, as any 1200KG high revving n/a car doing 0-100 in under 19 seconds (as in the autocar road test) would surely need 185-190 BHP minimum wouldnt it?
Yes, Litchfield have dynoed it here (standard flywheel hp vs tuned flywheel hp):
http://www.litchfieldimports.co.uk/Toyota/GT86-BRZ...
Not surprising as Autocar timed the 0-60s as 7.4s, about 1 second slower than a FWD EP3 Civic Type R (with the 'same' hp) was achieving 10 years ago.
http://www.litchfieldimports.co.uk/Toyota/GT86-BRZ...
Not surprising as Autocar timed the 0-60s as 7.4s, about 1 second slower than a FWD EP3 Civic Type R (with the 'same' hp) was achieving 10 years ago.
The independent road test figures I've seen show 0 - 100 in high 16's to mid 17's, right in line with claimed 197bhp + 1240kg weight.
Autocar's test car may have been tight, I've seen high 6's to 60mph in other publications.
That Litchfield '+25bhp' claim will be ambiguous and their factory BHP rolling road claim is probably wide of the mark, the Milltek exhaust would add almost nothing and the re-map maybe gives 10bhp, 15 at best. Tuning small capacity N/A cars producing a factory 100bhp per litre via a simple ecu map change doesn't give much gain let alone the 15% increase they're claiming.
Clio 172/182/197/200 show similar acceleration figures to the Toyota.
Autocar's test car may have been tight, I've seen high 6's to 60mph in other publications.
That Litchfield '+25bhp' claim will be ambiguous and their factory BHP rolling road claim is probably wide of the mark, the Milltek exhaust would add almost nothing and the re-map maybe gives 10bhp, 15 at best. Tuning small capacity N/A cars producing a factory 100bhp per litre via a simple ecu map change doesn't give much gain let alone the 15% increase they're claiming.
Clio 172/182/197/200 show similar acceleration figures to the Toyota.
There was a thread in General Gassing a few months ago where someone posted a dyno' graph showing them to be producing less than the claimed power.
Discussed here http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Discussed here http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Not sure I entirely agree, 20 BHP is quite a big difference on a 197 BHP car. The Focus could afford to be a few horses short as it normally came out higher than advertised on torque and being a turbo car, it went like stink.
I totally agree the GT86 is a great car, but I must admit for the advertised figures it should be closer to EP3 Civic Type R performance than it is.
I totally agree the GT86 is a great car, but I must admit for the advertised figures it should be closer to EP3 Civic Type R performance than it is.
Mastodon2 said:
No different to the Ford Focus RS MK2- Ford were claiming 300bhp, but the dynos said otherwise, to the tune of 25-30bhp. On the other hand, the RS Meganes were claimed to often make another 20bhp ontop of their factory claim 250bhp.
i believe the focus had an ecu error when first launched which stopped it being full power, they recalled them for an updateFurther point, have the GT86s dyno'd so far been very new, i.e. is it just one of those cars where the engine is particularly tight for a few thousand miles and they then make the quoted power later on? I seem to recall a number of Renault hot hatches were a bit like that. Having said that, difficult to imagine how even a loosed up engine would make up 22 BHP, if they are making just 175 at the flywheel!
It isn't rare for manufacturers to lie through their teeth about power outputs, Although Japanese sporty cars usually underestimate rather than over estimate like the Europeans in my experience!!
In all fairness though I doubt many cars would make their exact claimed power when strapped to a decent dyno (Dyno Dynamics etc) but shouldn't be far off! BMW M cars always read under in both my and my friends experience. I also have massive doubts about Ferrari's for the simple fact I have never seen a standard one put on a dyno as the owners seem scared to do it!!
If those figures are true though, and the gt86 are making essentially 10% less than quoted on a regular basis, then Toyota should be ashamed of themselves!
In all fairness though I doubt many cars would make their exact claimed power when strapped to a decent dyno (Dyno Dynamics etc) but shouldn't be far off! BMW M cars always read under in both my and my friends experience. I also have massive doubts about Ferrari's for the simple fact I have never seen a standard one put on a dyno as the owners seem scared to do it!!
If those figures are true though, and the gt86 are making essentially 10% less than quoted on a regular basis, then Toyota should be ashamed of themselves!
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