Rb25 + Hks 3040

[Roy]

You don't seem to get the big kick that i get - but top end is not that much different - but when I look at the rev range - I seem to get more down low...

But Doughboys boost curve looks a little...umm.... doughy. A bit like my boost response. :Oops:

B-man... do you have a graph with the boost on the right y-axis? I think you will find that with the smaller exhaust housing that his mid range will kick the living hell out of the rear wheels once the thing ramps on to boost, then holds boost properly....

[B-Man]

Matt - the rears.. well they spin ... I'm getting the hang of ....WOT, back off, then WOT again - to keep traction (even with semi slicks)

Roy - I did have that graph, but no longer - I can get another print out but I did keep the numbers:

Boost starts at 3000

3500 = 5 PSI and 80 rwkw

4000 = 8 PSI and 112 rwkw

4500 = 20 PSI and 200rwkw

5000 = 23 PSI and 260 rwkw

5500 = 22.5 PSI and 270 rwkw

6000 = 22 PSI and 310 rwkw

6500 = 21 PSI and 323 rwkw

[Merli]

Someone's having a few boost problems I see

[Merli]

Brendan: 20psi at 4500rpm

Chris: 7psi at 4500rpm

Bwahahahahahaha... Hope you get it sorted sometime in the next 8 hours Chris!

[DoughBoy]

It's sorted. After another 2 hours on the dyno it's got some very different figures...

Sorry no dyno graph. I am so tired I forgot to take it, I think I left some tools there too. That 300kw run was never to be repeated, I think that came about by spiking the shaft speed late, by fattening up the midrange it took 20kw away from the peak.

Having said that, it's got 280kw from 5500(?) to 7500, flat as Kate Moss. It couldn't make over 1.2 bar boost up in the rev range, spiked at 21psi @ 5000ish and tapered off as it kept going.

I'm a bit fuzzy so the rpm's aren't exact. Will get the graph to compare, but Brendan the larger -> the more potential. There's no way the .73 could keep up with the mighty 1.12!

[B-Man]

Glad you got it sorted Chris - I wasn't meaning to compare as if to compete mate - Just curious on the power curves that's all. I find it really interesting looking at Dyno graphs - especially when boost and rpm are plotted - it really makes you think about stuff.

[DoughBoy]

I don't think it's truly sorted, but I have got no mo' time to muck around with it for DC. Might continue developing it, but don't want to spend any more time on the damn thing! Sooo tired

[rb20-calais]

nice result, i am having traction issues with 200rwkw, you guys must really be having fun

Evan

[Sydneykid]

nice result, i am having traction issues with 200rwkw, you guys must really be having fun

Evan

Time for some decent suspension then?

[DoughBoy]

Evan cannot be saved, he's in a VL!

[rb20-calais]

I think it could be the tyre situation!

the cops pulled me over and said that my back tyres are bald so i popped the bonnet and showed em the 2 brand new ones in the boot and said that it was hard to find a place to fit 18" tyres but i found one that could do it on Monday, she was female and fell for it

Evan

[rob77]

Nice figures doughboy, I guess you'd be having the same traction problems as me. I jump from ~160hp @ 4000rpm to ~285hp @ 4500rpm

[DoughBoy]

Disclaimer: As I posted previously, after getting 4 hours sleep per night over a week I was in no condition to remember alot of finer details regarding output.....

This is the condition of tune my car was in from 12:30am Sat morning, and ran a best of 12.09 @123MPH.

How d'ya like them apples?

[Merli]

260rwkw and 123mph???

That doesn't sound right :confused:

[rb20-calais]

holy shit! thats an awesome time for 258rwkw, what tyres/wheels, etc were you using?

Evan

[DoughBoy]

Was running Brett's slightly worn 245 Nitto's on 16 inch R32 GTR rims.

[BU5TER]

cheeky flat changing no burnout needed f*cker did us all proud, probably one of the most impressive cars/drives I've ever witnessed, this was his 1st time racing ever down the 1/4 and in a 2 day old set up hahaha its pretty amazing really

[DoughBoy]

I got alot of help and asked a ton of questions, both Brett + Adrian gave me some useful tips.... well actually Brett's tips on burnouts made me stall the car, but I appreciate them all the same And his tyres

Edit: I know it's a lame excuse, but I went from 2nd to 5th in the 12.09 run.. so maybe it has a bit more left in it before I change a few things.

[whatsisname]

Just goes to show, huge peak power isn't needed to run very fast and quick numbers. Well done! The power curve from from 5500rpm to 7000rpm is bloody impressive. That would most certainly help with mph, and ET for that matter.

[whatsisname]

The more I look at your results the more I realise how much my driving sucks!