Like to thank Leighton for all his hard work on the remap. I need to go back at some point as the standard clutch was unstable. Plenty more power in the girl, but i need to sort this clutch. Well happy to hit 342bhp and 288 torque.

Spec
Stage 3 hybrid
Evo fmic
Sip and hks filter
Ported inlet and throttle body
ss decat and back box
Blitz boost control
uprated injectors
3.0 fpr
Walbro 255 pump and live feed
Standard clutch

Have you got a graph?

Seems like fairly good power from the stage 3 and bhp figure seems to be where people have been hitting recently.

What clutch you going to go for?

Ross

exhaustwise, you just had a decat and backbox? not even a full system with a bigger downpipe? suprising!

Will update graph once I scan the doc. Going to get a paddle clutch once I put more money in my funds.

Standard downpipe yes, I was very surprised myself with the results on a standard. Just shows what these hybrid are capable of.

importantly 'when' does the power get delivered?

I have the graphs Craig



Just goes to show that the "same" car and "same" spec does not always mean the "same" result. The torque delivery is different to the typical Stage 3, as shown by the graph, peaking later with the associated increase in power.

It was a shame about the slipping clutch, but as advised to Craig in the pre-map brief, at this level the standard clutch is always going to be marginal, especially if not new.

There is more to be had from this one

Good stuff Craig; have fun!

Thanks Leighton for that, saves time with the scanning. Very happy with the coupe, it's like driving a new car. Power delivery is amazing. Have to save up on fuel. Its going to be an interesting month.

It does look late, what's the size of your exhaust?

It's interesting to these these stats that are very similiar to mine even though I'm on a bigger turbo. Having opened my graph to compare though, I'm drawn to the difference in power loss to the wheels despite the peak figure and rpm being VERY similar.

Trappy 342bhp

Craig's car
342.9bhp @6,694rpm
305.0bhp @6,546rpm

Trappy
342.4bhp @6,558rpm
287.5bhp @6,379rpm

What on earth could be causing this an additional 20bhp loss to the wheels on an otherwise identicle car? Does this car have standard 20vT wheels I wonder?

I take it the stage 3 is the 62 trim compressor and 76 trim turbine?

If so what is the difference in trims and housings between the stage 3 and the GT2860RS?

Varying dyno results.

I thought both of them were completed on the same dyno by flea?

Ross

The difference is the gt28rs has slightly bigger housings that the stage 3, on the compressor side the housing is 0.60a/r vs machined 0.42a/r housing and the turbine housing on the rs is 0.64a/r as oppose to the hybrids machined 0.49a/r housing

Ambient temps can make an impact also.

Thanks Doug, so are the trims the same size? I see Trappy runs the even larger 0.86 a/r turbine housing. How does the larger housings impact the performance? Presumably the larger the housing the more efficiently the compressor / turbine can flow, which translates into more power for a given boost level?

More power but more Lag gunzi, I wouldn't go 86 on a small turbo.
I think my RSR does it all a true 300+hp with near std spool, but the stage 3 hybrids are a cheaper alternative.

The dyno might have been re-calibrated between the two cars runs? just shows you dyno's are really only good as an indicator or using as a back to back comparison of your own mods, thats why I have stuck with the heartbreaker dyno as its the only one my car has ever been on and I have now got a nice steady plot of my mods.
I could put it on fleas dyno and I would probably make 360hp but it don't mean bugger all really.

Hi Gunzi, the wheels are exactly the same, just the housings that are different, as jonone says you will get more power with the bigger exhaust housing but it will be laggier, so a lot depends on your driving style, if you don't mind really reving it, it might suit but personally i would rather use either the standard 0.49a/r housing or 0.64a/r housing and have the power albeit a bit less of it at more useable revs and hence road speeds

No difference in the dyno, same settings and same calibration data. The mass of the rollers does not change!

Not all Stage 3 hybrids make this power, you only have to look at the league table to see the variance. In Craig's case the torque delivery is really quite different with a late surge at the top end. Peak torque is no different, but when it is made higher up it will naturally mean greater horsepower. Number of potential causes as advised to Craig e.g. retarded cam.

As for wheel power, well this is where a dyno that measures coastdown losses is very useful. I can get the same car, same day etc, remove the wheel and put in a slightly sticking brake caliper, reduce the tyre pressure by 10psi, and then run it up again. The flywheel power will be almost identical, but the wheel power will be a lot less. This is perfect for problem solving as it tells me that there is nothing wrong with the engine (or tune), but that there is a problem somewhere between the flywheel and tyre.

Now do the same test on a Dyno Dynamics (Heartbreaker dyno), and you will end up with lower wheel power but also lower flywheel power... well that's not right is it! This is because the Dyno Dynamics doesn't measure the losses, but simply adds a fixed loss to the wheel power. So now you have a low wheel figure, a low flywheel figure and you don't realise that you have a slightly sticking caliper with an underinflated tyre. A lot of time to be wasted searching for an engine problem that isn't there.

Man, and the heartbreaker lives up to its name. My car with RS made 344bhp on Flea's dyno and a whole 286bhp at Surrey RR.

Massive difference, but shows you how inaccurate dyno's can be.

what torque pero?

305lbft on Flea's dyno. Can't remember what it made on the heartbreaker.

barbles said your to scared to put your car on the heartbreaker now!

...scared I'll break his dyno.

nah, he would get bored before you broke it, how long does it take you to get to 8,000 revs?........ couple of weeks in it?

Interesting. My car has always had pretty high transmission losses towards the top end over the years. I always keep tyre pressures up when on the rollers though and I've had the thing for 8 years so I'm guessing I can rule out a sticking caliper...

It's also not consistent across the rev band, instead only the last 1,000rpm if that my be indicative?

Obviously wheel power is what gives the performance so if that is lower than another car's making the same engine power, then it will be slower. Worth looking into! Any ideas what other faulty mechanical parts could cause this? Sounds an awful lot like easy, cheap additional performance!