G-Force Rolling Road Results

[NITO]

Hi Guys,

Took the car along to G-Force in Ayelsbury yesterday for a Power Test .

You chaps are going to have fun on Saturday for the RR day. Unfortunately I couldn't make Saturday so I went on Wednesday instead.

The good news is that their state of the art rolling road allows a shootout mode by which the RR operators cannot tamper with any of the figures or fudge them in any way so that all your results should be pretty much directly comparable to mine as mine has been done in shootout mode too.

The RR can also plot lambda and boost curve, against power and revs or road speed. Interesting to see how rich mine was running with the AIC. I even managed to loop the loop on the graph! :eek: lol

Credit to G-Force, my first time there but the workshop is immaculate and the guys are enthusiastic and extremely helpful.

Big thanks to Chris Davies and John Greasley for their time and help and the aussie chap driving the car on the rollers (didn't get his name!). They even put my de-cat pipe back on for me.

On the first run the car yielded 407bhp at the rear wheels @1.4bar. The high boost run @1.5bar gave 420bhp at the rear wheels but unfortunately the run was dogged by some misfiring probably due to jet washing the engine bay a couple of days before. Whatever it was it's something to look forward to next time as it'll be higher since the mis-fire screwed up the spooling of the turbo and my boost curve.

The most powerful rwd car to grace their rollers is a tuned GT2 Porsche at 443bhp at the wheels so the gauntlet is set. Maybe next time it'll top this!!

Good luck to all of you on Sat, should be a fun day and someone might knock the Porsches crown.

Autos isn't a problem for those of you who are worried, do UK cars have the manu switch on the auto box?? Mine (auto) was run in second gear with manu locked in and tc off.

Also Autos have higher transmission losses than manuals so manuals have the advantage measuring paw figures!!

Regards
Nito

[Gaz Walker]

Originally posted by NITO
[B]On the first run the car yielded 407bhp at the rear wheels @1.4bar. The high boost run @1.5bar gave 420bhp at the rear wheels

Not bad at all.

What sort of turbo is on the car Nito?


due to jet washing the engine bay a couple of days before. Whatever it was it's something to look forward to next time as it'll be higher since the mis-fire screwed up the spooling of the turbo and my boost curve.

:eek:

Gaz.

[NITO]

Gaz,

It's the HKS T04R jobbie.

Rgds
Nito

[Need4Speed]

420bhp with a misfire! John Greasley's got some nice Porsches hasn't he.

[Gaz Walker]

T04R - nice :)

I still can't believe you jet washed the engine ;)

Gaz.

[Mark Kindell]

NITO I was down at G-force today and had a look at your dyno runs very impressive :)

[Martin F]

Sounds like G-Force are building up a good reputation.

Shame i can't make Saturday's run.

Good results Nito, any chance of seeing your graph ? and does it have A\F, boost etc all on the same graph ?

[GavinL]

Originally posted by Martin F
Sounds like G-Force are building up a good reputation.

Shame i can't make Saturday's run.

Good results Nito, any chance of seeing your graph ? and does it have A\F, boost etc all on the same graph ?

It does sound good...how much out of curiosity?

[NITO]

Lol @ gaz,

The legendary Wizard of Wax did a full valet of the car on Saturday also got rid of a few surface scratches on the front wings as well as hard to shift deposits on the paintwork. He cleaned the engine bay, I asked him to keep away from specific electrics, the AIC and Fuse Box but I didn't think the water would get into the plug cover...didn't really think, is this common with these when they are jet washed? I'll have to take the cover off and investigate ;)

Mark, did you see where it looped the loop on the misfire!!

Martin, I'll have to scan them in, I've got the boost and lambda on different graphs but set out the same so they are directly comparable in terms of revs and power output. You can effectively have four printouts possibly more for each run, and then you can have more than one run on the graph. They can also plot tractive effort from which you can take lbs/ft figure. I think mine equated to 475lbs/ft torque although thinking back I'm not sure if that was at the wheels or estimated back to the flywheel.

Gavin, Cost was £55+vat and I went away with a wad of paperwork and did three runs. I don't know if they can spend this sort of time per car on a shootout day as strapping the car down and rigging up all the diagnostic equipment to the car etc takes time.

All in all a very professional outfit and confidence inspiring to see your car surrounded by Race cars, Porsches/Ferraris and even a GT1!

Good luck to them,

Regards
Nito

[Gaz Walker]

lol

You just shouldn't jet wash the engine bay at all really, I know I wouldn't - especially on a Supra!

Steam Clean is a better idea :)

Gaz.

[Ian C]

Tell that to your alarm :)

-Ian

[NITO]

I thought steam cleaning was worse as the steam would penetrate areas the water wouldn't!

Nito

[Chris Wilson]

Originally posted by NITO
I thought steam cleaning was worse as the steam would penetrate areas the water wouldn't!

Nito

RR: Money well spent, sounds like good value for fuelling read out and graphs. Did they use a wide band O2 reader? Where did they stick the sensor, up the exhaust tail pipe or have a weld in boss for a 2nd sensor in the downpipes?

Washing engine: Steaming or pressure washing is fine, most "steam" cleaners will run as just very hot water, setting to steam is too severe and will remove paint! So long as you do a really long run in the car soon after washing the engine to dry out all the connectors and nooks and crannies it will be fine. You will have filled the plug wells and coil cavity with water, it should have been blasted out with comressed air with the top cover off, however it should be dry after parking overnight with a hot engine, the area is well ventilated (hence water gets in easily). I wouldn't wash it too regulary, perhaps annually is a reasonable period.

[Paul Whiffin]

Think they've got a wideband they stick up the rear end, didn't really take to much notice as I've got one on mine permanent. Bloody good place though, top quality RR that one, best I've been to..