Project 'gozila'...

[Swiper the Fox]

No not your motor's dyno graph Paul, just cam duration change to Marko's one

lol...interesting comparison though...just shows a basic 26...is just as good as a big $$ 30...and makes earlier torque but doesn't hold on as long. The graphs are very similar with Marko's pipping mine by 0.1KW

I thought you may have been hinting at your engine...don't you run smaller cams Steve ?

Edited July 21, 2009 by DiRTgarage

[Marko R1]

the bigger the better with rb30's as i was informed!

[N1GTR]

Thats right, I used 270IN and EX with 10.25mm for the current one. But the cams were never dialled in during the tune as we were pressed for time, that aside it would be great if someone could overlay Marko's graph and this graph;

Note this is using the same size turbos (im pretty sure marko has the .6 -10's meaning 400hp each, im on HKSGTRS's) and my head is only cleaned up, its not "ported"

Down low its pretty much the same, but look at the midrange and up top, also lower boost

[N1GTR]

Marko i dont suppose you feel like changing to 260's and retesting?

[Marko R1]

stevo, if i switched them there is labour + another tune = $

your above graph is based on a 2 wheel dyno whereas mine is a 4 wheel dyno which may also change the results (i.e. jim @ crd advised my power level on 2 wheels on his dyno is 445rwkw)

[Swiper the Fox]

the bigger the better with rb30's as i was informed!

to be fair yours still has a little way to go though Marko and i was running more boost (27psi)...why do you think im building one.

can't wait to see what it does with my head, turbo and plenunm on one drinking methanol at 35psi.

a direct comparison between my current bottom end and the 30 after running mine in with pump shall be interesting...my turbo should really come into its own. I feel that 30 bottom ends do have their application, but im far from convinced they are the be all and end all.

[N1GTR]

Of course there's more money involved, its a GTR after all

Not worried about power figures, just where the peak power is in the rpm range

[Marko R1]

i spent over 20k building my engine BUT i sold off all of my other bits from the rb26, end of the day the whole thing cost me approx 13k (includes tuning cost @ $1500)

best 13k ive spent to date

[Swiper the Fox]

i spent over 20k building my engine BUT i sold off all of my other bits from the rb26, end of the day the whole thing cost me approx 13k (includes tuning cost @ $1500)

best 13k ive spent to date

As Bakes says...if it makes you happy its a bargain.

how much do you get back from Wayne Swan for the engine ?

Edited July 21, 2009 by DiRTgarage

[Marko R1]

As Bakes says...if it makes you happy its a bargain.

how much do you get back from Wayne Swan for the engine ?

paul, who the fark is that lol

[Swiper the Fox]

paul, who the fark is that lol

The taxman.

[Marko R1]

another blonde moment for marko geez

i'll find out once i have a chat with my accountant

[R31Nismoid]

Marko - are we gonna see a graph with the bottom axis defined at all?

Few people asked i see, got me wondering too what it is

[Beer Baron]

no need. you can see if it peaks at 8500 that each line is 3,4,5,6,7,8000rpm.

it's interesting that my 26 with headwork, small cams and GT-SS made 160kw @ 4,000 vs 150kw on the 30 with GTRS, and at 4,400rpm mine was 210kw vs 180kw for your 30. at 5,000rpm i'm making 250kw and you have 230kw. at 5,600 I have 275kw and you are now just overtaking me with 290kw (also getting very near your peak torque). and then at 6,000rpm I have just 290kw you have 330kw and from 6,000rpm to 8,000rpm you run away with the bigger turbos and make another 100kw.

it's interesting though that the 3 litre doesn't make the GT-RS turbos as responsive as people make out. there is still a lag price to pay when you see that a little ol 2.6 with the baby GT-SS are about even with it up to 6,000rpm. having said that mine was only running about 17 or 18psi at the time as I was being a bit conservative, it's now running 23psi in the hands of it's new owner and I think with that more boost, and it coming on sooner it would give the RB30/GT-RS combo a good fight up to 6,000rpm and would probably feel more responsive/torqueier down low on the street. the top end power can't be denied though!!! and when it comes down to it they are two different dynos so it's hard to really get any truth from it, but it is still interesting. I've no doubt though on the whole the 30/RS combo is faster. but i'm not 100% sure which would be the better street car/hills thrasher... ?

[Beer Baron]

oh, and your car will be bullshit fast on the strip if you drag it. 10s here you come.

[R31Nismoid]

no need. you can see if it peaks at 8500 that each line is 3,4,5,6,7,8000rpm.

Well see that's i would think myself at first glance... However i don't want to assume just yet because as it was asked earlier...

Have I got it right, max torque is around 4,250 rpm and max horsepower is around 6,100 rpm and it makes less than 50 rwkw at 3,000 rpm? Or is my maths totally screwed up?

So 3 of us are thinking that is how the axis is, so indeed only making 50rwkw @ 3,000rpm (by what we think)

However Marko then came along and said...

your calculations are not right, would be if it was a rgv250

Which basically says none of us are correct in our assumption of the bottom axis

So that would almost certainly mean its not the scale we are thinking

Hence I'm trying to find out by actually getting the bottom axis to be sure

[Marko R1]

i'll post another graph tonight from my other pc which includes the km/h axis (it is from 0-200km/h)

i had an rb26 with gtss's & i can tell you that the difference in torque is massive between the rb26/gtss v's rb30/-10s

chalk & cheese

[Marko R1]

oh, and your car will be bullshit fast on the strip if you drag it. 10s here you come.

this well considering i pulled an 11.1 @ 129mph with my rb26/gtss setup which had 312awkw...this setup will smash a 10!

[Beer Baron]

well he himself said it was revv'd to 8,5000 not 9,000rpm. so assuming he's telling the truth then peak TORQUE is about 6,500rpm and peak power is about 8,000rpm and held to the 8,500rpm limit. not sure where gary got the 4,250rpm for peak torque if it's being revv'd to 8,500rpm?!

[Beer Baron]

this well considering i pulled an 11.1 @ 129mph with my rb26/gtss setup which had 312awkw...this setup will smash a 10!

agree with that, but not all RB26/GT-SS set-ups are the same....