[Revolution Mini Works]

what correction factors are you guys using?

[Paul Webster]

You have to talk in whp for our American Mini cousins

[roland2003]

252bhp..... Egggscelent
Best Regards Roland GTT

[Revolution Mini Works]

Quote: Originally Posted by roland2003 (original)

252bhp..... Egggscelent
Best Regards Roland GTT

I still can't figure out why you wouldn't use the whp that the dyno shows instead of a guestimated flywheel hp. I guess it's all about the big numbers

[roland2003]

kuhmo... theres at least 2 threads I've put up explaining in detail why whp is meaningless. One is called 'Flywheel Horsepower v Wheel Horse Power' the other is 'Going On a Rolling Road? Read This'
Thats why

[Revolution Mini Works]

Quote: Originally Posted by roland2003 (original)

kuhmo... theres at least 2 threads I've put up explaining in detail why whp is meaningless. One is called 'Flywheel Horsepower v Wheel Horse Power' the other is 'Going On a Rolling Road? Read This'
Thats why

Roland,
I don't care if you put up 100 articles of why.....
either you make the power or you don't
I have built the most powerful MINI's in the world and we don't hide our numbers

[roland2003]

its not just my thoughts ... Its Dave walker, Andy at Street Performance and just about every RR tuning house Ive spoken too aswell . Take the blinkers off ,read carefully , digest ,and you too will realise that only flywheel power (with measured drivetrain losses and correction factor computed to DIN standard ) is of any use as a comparison. Even then its not perfect but its the best your gonna get.
Best Regards Roland GTT

[Revolution Mini Works]

every respected tuner that I know publishes numbers from the wheels because in the end that is all that truly matters... "what can I really get at the ground."

also we just ran sub 1:30 at Streets of Willow where a 328whp turbo car driven by a World Cup driver only ran 1:31 in a Eurotuner shootout

area under the curve matters

[Paul Webster]

And we know what Snowies will run in the 1/4 as well now

[Snowie]

Quote: Originally Posted by 1320autos (original)

And we know what Snowies will run in the 1/4 as well now

Providing I can put the power down - damn wheel spin all the way up to and including 3rd

Needed some sticky rubber for the 0 to 100 test

[Loui]

Did you change anything snowie or was it just the cold weather?

[Paul Webster]

For those who were wishing to see the difference between a GTT stage 4 head with a Shrick cam, AFPR,450c injectors and a GTT optimised bypass valve against a JCW / GP cylinder head.

Back to back test attached on post 1 Run3 and Run 4 shows that the improvements were

2000 -3bhp
2500 3bhp
3000 1bhp
3500 2bhp
4000 2bhp
4500 7bhp
5000 9bhp
5500 13bhp
6000 15bhp
6500 15bhp
7000 16bhp

At the SRR day Snowie picked up a lot off horsepower without doing anything!! the only thing I can think off is that it had a slight boost leak on previous runs maybe even on run 1 in std form compared to the runs on that day.

I'm sure Snowie will update the list with his SRR results when he gets 5 mins then we can compare the boost and af's recorded on that day.

Am I right in saying Snowie that the dyno operator had a GP in the week before that made218bhp which is 16 more than Snowies made originally, coincendtley this is the difference between run 5 and the SRR day.

It would be nice to overlay the two dyno sheets.

[BigShow]

Am I missing something here or just being a bit thick (probably the latter)... by adding the GTT head and gubbins Snowies car generated a peak increase of 16 bhp over a stock GP head?

[Loui]

Quote: Originally Posted by BigShow (original)

Am I missing something here or just being a bit thick (probably the latter)... by adding the GTT head and gubbins Snowies car generated a peak increase of 16 bhp over a stock GP head?

It looks like that, what did it do torque wise?

[Fabio]

Quote: Originally Posted by BigShow (original)

Am I missing something here or just being a bit thick (probably the latter)... by adding the GTT head and gubbins Snowies car generated a peak increase of 16 bhp over a stock GP head?

what are gubbins??

[BigShow]

Peak torque increase was 20lbs ft by the look of it.

'Gubbins' is just slang for bits, as in head and all the other bits likes valves etc.

[Paul Webster]

The other way to look at it on the day that BRMCooper made 230 on the day with stock IC and exactly the same ex system so over a stock head it made 22hp peak neither of the cars are tuned.

So is a JCW head and GP IC worth 6hp peak?

I've just realised why I like our TAT system because i can overlay anyones dyno plot and stare for a long time

[fdefelice]

were can i get a list that i can read off of ,that i can just do performance work to my mini gp, i have no clue how to make it fast i need spme good products

[GTT 280]

Hi all,

Interestingly i read the comment:

"....when you fit a stage 4 head with bigger valves then you can also expect to see boost pressure reduced as airflow restriction is reduced as the head breaths better... "

What effect does this have on torque?
Does boost not really matter that much then in the delivery of power? (currently on 18psi)
Does a stage 4 head generate a different throatier sound? (silly i know, but i lurv the zorst notes modded car can generate!)

Moving from a Stage 2 head to a Stage 4 head - what can i be expected to gain with my current array of tuning mods? will i gain/loose in any areas on the speed band?

Does it need a remap?
Assume i can keep my existing Schrik cam?

Roland - i want a, sorry, i would like a Stage 4 head in February.... can we PM to discuss..... (assuming you find this posting of mine in the haystack that is MINI2.com )

Cheers,
K.

[minicabrio]

Karl, you're probably better off posting that in the new GTT forum for Roland to see....

I can move it if it helps?