well the car simply perform's like it had an increase in power....



Here is the compared graph from last time it ran at nobles to...



And the at the wheels figure - this is not to be compared to the likes of AVA. You would probably see 480-500bhp at the wheels on AVA's rollers



Big thanks to the derbyshire rsoc for the day

And MASSIVE thanks to the NMS lot for giving me that little extra power so i can hammer nutter at brunters

 

well done!!

 

Jesus christ, at 4700rpm you have lost over 150lbft of torque now when compared with the results from the previous setup!
And its slower ALL the way up to 6300rpm before you get any gains at all.

Must feel far less reponsive in "normal" driving (ie anything under 6K rpm when you first accelerate) now than before?

Awesome BHP figure though

 

PS

Its also interesting that at 6K rpm it now has 40lbft less torque despite making 5psi MORE boost

Is it running massive overlap on the cams now or something?

 

would be great to compare against euans T4 power

get her up to ava for a rr day dingle

 

Why would the transmission losses be 50bhp higher at one place than another, or do you believe one or more of the two sets of rollers in question to be inaccurate?

 

Impressive

 

Chip, there is no boost spike, capped for wheel spin issues, hence the torque not having the spike and the graph's being slightly different.

Only thing that has has changed is the head work, same cam timing etc...

And AVA's rollers are very different to the sun setup of nobles...

I understand it to be larger rollers less losses.

 

Dingy : That's very impressive, and a sensible torque curve for your car (2wd).......As you correctly say, with a torque spike, it would only lead to spinning your rear wheels, and make the car less drivable in the " Real World ". With a nice linear torque curve, you have a much more driveable car.

It's not all about what's on the graph.......it's on the road where it counts. Looking forward to a ride in it one day.

Jim

 

Would be awesome to get that onto some decent boost management so that in the higher gears you could have the spike back then once you have the grip for it if its still capable of making the big boost figures lower down now on the new head etc, or even getting close to them for that matter, rather than (im assuming) relying on an old level 8 which has no concept of what gear you are in.
Its specs like this (huge power in rwd chassis with limited grip) that really show up the shortfalls in what you can achieve in the real world on such basic management.

Does it feel a lot slower now in normal driving in the higher gears with the drop in midrange torque from not having the boost spike anymore to stop it spinning in the lower gears? Or does it tend to live most of its life above 6K rpm where the gains are anyway?

Did Karl comment on why it makes so much less torque now at 6Krpm despite the extra boost, as that seems counter intuitive to what one would expect to happen at those sort of revs on a "bigger" head.

 

Absolutely, with limited control available on a basic ECU, its absolutely paramount to compromise things in a way that results in useable power, far better to lose out in the gears you arent so interested in if it makes it more driveable in the gears you use more.
Better still though to have boost controlled versus throttle angle, or against gear or similar though of course, as then you can have your cake and eat it so to speak!

 

Feels much better driving at all area's now, and just comes alive more so at the top end...

I didn't know you could get boost control that altered with gear changes....

And the air injector setup is pretty decent even by todays standard.

I thought that the smaller port's in the head would make it more punchy and have a bigger torque curve anyway....hence why the headwork and capped boost has caused a drop in the figures...

PS - I aint into power figures at all, anyone that knows me would know that, i just thought it was interestsing in the power gains for 4psi and 80bhp

 

Oh yes absolutely, talk to someone like Mark Shead at MAD for that mate, its actually relatively old technology now by all accounts (although obviously not as old as the 80s ecu boost control me and you are putting up with currently, lol)

Im sure it works pretty well within the limited confines of what the L8 can ask of it

Ah, I didnt realise it was SMALLER that you had gone on the head, because of the enormous loss in bottom end (even with the change in boost) it made it look like it was the other way round, as did the huge gains at 7K+

Yeah the massive change in top end is certainly a big difference, must be night and day difference in pace when you are really "on it" now and using those high revs to full effect

Will be good to see the changes in quarter mile terminals if you end up with some comparison figures for before and after

 

spot on steve

i dont know how your going to drive it ,but good luck

well done to you both

 

to be quite frank ur motor would be mental at 300 bhp with u driving lol

Then u go and turn up with 560

haha

quality matey!!!

Pointless comparing the atw power of the two rollers as stated - different setups and different readings on the atw figures as we have seen before.

Think my rst made 195 wheels at ava and 175 at nobels

AVA had estimated the power at around 220- to 230 bhp engine (just a rough estimate) and Nobles actually came up with around 220 to 230 bhp at the engine through its electronic estimation too. From what I was told its to do with the roller sizes and the rpm of the rollers being different at any set wheelspeed.

(for anyone who wanted to know and didnt already! )

WP Dingy - its just another addition of madness!!
RW

 

Dingy, Your down to run on my rollers on the 6th October...

Linsay put you forward, Still ok?


Nice figure

 

apexi avcr can do different boost in different gears can it not?

bryan

 

Yes absolutely correct

 

Figs look great mate

562 from a T4 why would you need anything else

wonder what the midrange would be like if the boost was un capped as it look more like a N/A curve the way it is.

Is it capped against wheel spin on rollers or against wheel spin on the road?

Was it ran in 4th dingy?

 

Yes pal thats ok

 

run up in 4th, and its had a 42pound boost spike when it was being mapped LOL UNFUCKINGDRIVEABLE.....

 

Mental in a Mk2! Bet it's fun now!

 

42 pounds would be awesome for a 4th gear overtake etc

Definately you should think of getting it setup so that you can use that potential sometimes and not dial it all out in every gear I reckon

 

42psi... and theres me loving 14psi in mine

 

LOL

I aint changing it now, very happy with it all

 

well done Steve and Karl.

 

Steve, curious mate as i dont know your full engine spec.

but what turbo spec are you running with, just that mine will be mapped via Karl in the near future aswell.

 

nice 1 mate

 

would hate to have to have the boost capped

why not let it run full boost but use the most sophisticated boost controller in the world?











































right foot

 

 

What's the air injector set up like, is it running twins or a single ?

 

bet that's fun!!! what kinda suspension setup you got on it?
Is it a bit lairy to handle compared to a saph etc?

Will be YBing my Capri at some point

 

here here Euan.

 

very good dingy

 

Mental

 

doubt anyone would be saying that after the chance to drive the car with and without uncapped boost.

bet its fucking undrivable without

 

mental like the owner

 

car is fukin mental glad it`s all come together for you mate after the shit luck you`ve had with it