Oi!


The only 2 coupe's that comfortably breezed past 400hp on the day..

Ahem. Only one Coupe breezed past 500bhp on the day.

Willies are only to be waved at dawn thanks.

Funny you should say that. I know a Dawn. And I don't like to wake up at crack of Dawn.

Lol!

Aiding and abetting

Who got the most torque on the day?

The GT-R, then me.

Anyone take any videos of the Gtr?
Was it new shape r35?

So what's the fix The Wise Old One?

Yes it was the new shaped one, the R35? I chatted to Ian and it had a few upgrades including the Y pipe and a stage conversion. No videos by me but it rolled 569bhp and sounded amazing!

Call me and i'll sort it

The first step would be to let me check it on the road, as it has been four years this month since it was mapped, so potential for variances in engine components/sensors over that time. I have looked at your old logs and you are only running 0.3-0.4 AFR richer than I set it, so not a million miles out at all. We never had your Coupe on my dyno, so would be good to compare

As for it having a power sapping 10 AFR, if you actually look at the graph you will see it only briefly touches 10.9 between 3.5-4.5k, but in all other areas it is averaging 11.1-11.2 and at peak power it is 11.4 so far from being power sapping!! There seems to be considerable lack of understanding regarding air fuel ratios on power/torque, something I will be addressing in detail later on.

The main problem with your car is the lack of boost, if you compare your car to deannn_20vt, as you both have the same RSR turbo, you will see you have 0.25bar less boost pretty much all the way to the redline. That's a lot of pressure to be giving up!



The main culprit for this is the wastegate actuator, therefore we should adjust the pre-load or replace for a 14psi actuator so that the correct level of boost can be used. I'll give you a call later Sean

Oh and we still seem to be missing a fair few graphs, come on chaps!!

Just out of interest how much more power do you think both dean-20vt and Begbie would have got if they've have achieved the boost they get on the road...
Dean-20vt's usually holds 1.4 to redline (1.2 @ redline on dyno)
Begbies is normally 1.5 to redline (boost only got to 1.35 then held all the way)????
I reckon dean-20vt would have got to around 340 (from 322) & Begbie would have done atleast 420 (from 399), & prob 400 torques!!
All speculation I know, but it seems Fleas Dastek is at MOST 5% out..... Although tim42's results are near identicle!!


Nick

Couple of videos :

392bhp Porsche GT3RS
567bhp Skyline GTR

Well Jack (deannn_20vt) didn't have his car on my dyno when I detuned it from 99 to 97 octane, although I don't think his does hold 1.4bar all the way from memory. As for Begbie, well I agree it would have seen another 20bhp and 15lbs/ft, well within the efficiency of the turbo.

Tim's green Coupe now has a Stage 3 hybrid and all the usual bolt on mods, although I haven't mapped it so not sure how it has been setup. It certainly needs some attention as 1.55bar is way too much boost (and likely more on the road!), especially if AFR's are all over the place. Very unusual to have torque higher than bhp, and peak power at 5200rpm that never happens on a 20vt engine. The only time I ever really see this is if the engine is detonating badly at peak torque (cylinder pressures), so torque and power drop off a cliff.

Here's an AFR table to help.

Air/fuel mixture and characteristics

6.0 rich burn limit (fully warm engine)
9.0/10.0 black smoke/low power
11.5 approx rich best torque at wide-open throttle
12.0 safe best power at wide-open throttle
13.3 approx lean best torque
14.6 stoichiometric AFR (chemically ideal) <-- mean just enough fuel and air
15.5 lean cruise
16.5 usual best economy

Please contact Jamie5 and Stuart81 as they need your asisstance also.

I already have Barbz Anyway, let's see your graphs!

Interesting to note the GTR R35 air fuel ratios!

Brilliant!

One sec.

All and well having great peak power figures but the journey to 500hp can be an interesting one.

At least scan it so it shows the X axis too!

Oops! Forgot legend.

Biggenz - Green.
PT6262 82ar (GT35 category)
2.15bar

Mine - Black.
GTX3076 82ar
1.9bar

Scanned by a third party

What you'd suspect from a remapped version i suppose?

Pictures and thousand words spring to mind

I'll scan my graphs when I get home tonight, mine wasn't holding boost so someone maybe able to shed light on what the issue maybe. It's also idling very strangely once hot (I'll post up a clip of what I mean).

Lots of results missing guys cmon.

Someone should do a list, a bit like the attendees list then bhp and torque figures next to names.

If i spent 50k on a GTR R35 and my afr profile look like that, i'd send it back.

On tarmac, both coupe's have unrelenting power deliver in every gear. Biggenz's has 1 main advantage due to the size of turbocharger, he's able to stretch the rpm threshold further in each gear by 1300rpm. I make up the loss lower down for a more track focused setup.

Horses for courses..