[Revolution Mini Works]

Quote: Originally Posted by Rigsey (original)

Whats the correct correction factor then?

12% seems to be acceptable.... we only run WHP so what the dyno says SAE is what you get

if you really want to find out BHP what your car is.... pull the engine and hook it to an engine dyno

[1320autos]

Falkland Performance Centre - www.falkland.co.uk - Maha Chassis Dynometer

Is this the place?? that is some investmant with that dyno, I'm curious why the drivetrain loss is so huge.

It makes it hard when you're comparing numbers with the US guys as they talk in whp.

[Aberdeen Al]

Quote: Originally Posted by 1320autos (original)

Whose head are you using? What year is your Cooper S?

Janspeed head.

March 2003

[Aberdeen Al]

Quote: Originally Posted by 1320autos (original)

Falkland Performance Centre - www.falkland.co.uk - Maha Chassis Dynometer

Is this the place?? that is some investmant with that dyno, I'm curious why the drivetrain loss is so huge.

The very place!

[1320autos]

Janspeed are doing cylinder heads??

[1320autos]

Have you had your gearbox replaced?? what tyre size are you running?

[roland2003]

There is a Janspeed MCS head on display in there reception area. We see it everytime we go in to collect exhausts. Its pretty basic CNC milling though (no 3D stuff). The best heads with the most advanced CNC machining are the GTT heads. We are very advanced with CNC milling (that was my trade for 14 years).
Claims of high power increase on stock engines + gasflowed head are a bit like the increases you get by remapping a standard mcs.............ie not representative of the increases you would get from that head or remap COMBINED with a hike in boost.
eg Take a standard head slice 1mm off the face ..gain 20 horsepower or so (and VERY torquey!) and market the head as 'gains 25bhp' even on a stock car. Trouble is that head would need to be so different on a pullied car to gain the 25bhp (reliably). Same with mapping, you can gain 'say' 15bhp on a standard car BUT again this map doesnt work with a pullied car. ( too advanced timing) In effect there are 3 things you can increase ...TIMING, COMPRESSION BOOST. You need to see the results of 'off the production line' heads on cars with boost increase etc. Not one off 'blueprinted' heads on stock boost cars. I reckon I could produce a head that would gain around 40bhp on a stock engine +remap. It wouldnt be any good with a pulley though,and the overall max you could get from the engine would be limited. You need to balance everything ..thats how we got 273bhp (240whp) from our old supercharged GTT260 car.(uses GTT stage 2 head)

[Aberdeen Al]

Quote: Originally Posted by 1320autos (original)

Have you had your gearbox replaced?? what tyre size are you running?

Standard 03 MCS 6 x speed gearbox & standard 17" spokes 2ith 205/45R17 tyres..................................for just now! My OZ Ultraleggeras were damaged when they arrvived in the post !

[1320autos]

Have they had a chance to look at it yet??

[Aberdeen Al]

Quote: Originally Posted by 1320autos (original)

Have they had a chance to look at it yet??

The car is rebuilt and waiting to be picked up although the guy working on it states that too much fuel going into the engine especially with the 450cc injectors......................the up shot is that the car desperately needs remapped!

I now need to find someone that can give me a remap:

1. I've emailed EssentialMini for MTH - they are having problems with them and I think have pulled them off their web site - so that's a no go!
2. I've emailed Roland at GTT to see if he can help me out - 90% of parts are GTT - just awaiting a reply.
3. Anyone else give me names / details of companies I can get a re-map from?

Thanks

[1320autos]

Roland has made 273bhp and 240whp with standard injectors and I know that we've seen 200-210whp 230-240bhp with std Injectors and with the 380s we saw 220whp 250bhp.

So I would stick the 380s back in.

[roland2003]

Hi Allan, what you need in the first instance is our AFPR. This we can preset to reduce the fuel pressure slightly. The injectors you have are the better size to use with head/shrick cam combo.We can supply MTH remap but need the car here to do. RRP for mth is 560 Euro +vat.
Which is a lot more than it used to be unfortunatly.
Best Regards Roland GTT

[Revolution Mini Works]

it seems to me everyone is putting a tuniquet on a paper cut

isn't there anyone who does mapping ?

[1320autos]

I presume they must of re-dyno it as they say about the AF being to rich.

Did they say what the afs were??

Did they say what peak trq and hp was now??

Did they find the previous missing hp??

[Aberdeen Al]

Quote: Originally Posted by roland2003 (original)

Hi Allan, what you need in the first instance is our AFPR. This we can preset to reduce the fuel pressure slightly. The injectors you have are the better size to use with head/shrick cam combo.We can supply MTH remap but need the car here to do. RRP for mth is 560 Euro +vat.
Which is a lot more than it used to be unfortunatly.
Best Regards Roland GTT

Hi Roland - Thanks - I'll give you a call later about the AFPR.

Can't justify the trip to you for the re-map at the moment.

Just to clear up things mentioned above - yes some cars will get away with standard map but according to the guy working on my car (and test drove it this morning) states it seems to be struggling and not very smooth.

Oh the joys !

[Revolution Mini Works]

Quote: Originally Posted by 1320autos (original)

Roland has made 273bhp and 240whp with standard injectors and I know that we've seen 200-210whp 230-240bhp with std Injectors and with the 380s we saw 220whp 250bhp.

So I would stick the 380s back in.

I am confused here::::

Roland made 240whp with stock injectors but they put in 450cc injectors on a car only making 190bhp?

[1320autos]

What whp and wtrq have you seen with stock 380 etc etc Jan??

[Revolution Mini Works]

Quote: Originally Posted by 1320autos (original)

What whp and wtrq have you seen with stock 380 etc etc Jan??

with a JCW head , injectors and my tune 201whp and 168tq
this dyno read like a mustang dyno
before tune 183whp and 160tq

stock head 15% pulley, 380cc injectors , borla street exhaust
and tuned 190whp 163 tq

before tune 178whp 156tq


we had a GP on the Helix dyno....( the heartbreaker)
we put my custom header on it and tune and it finished with 198whp 170tq
over 700 mini's have dyno'd there and there has ONLY been 1 car to ever break 200whp on that dyno until we brought 5 RMW cars there... the board has been re-written

another JCW car showed up there and put down 166whp with exhaust and finished
after the head/header/tune with 218whp and 170tq ... not to mention 150k on the old supercharger

[k-huevo]

As I understand it, scaling non-OEM/Siemens injectors requires dedicated tables & maps.

I experienced an interesting phenomenon recently; I replaced my aging O2 sensors and acquired improved performance & gas mileage (2mpg+) as a result. O2 sensors can become lazy without generating a fault code; some have attributed slow sensors to everything from collapsed ring lands on the lean end to sluggish behavior on the rich end.

[Revolution Mini Works]

Quote: Originally Posted by k-huevo (original)

As I understand it, scaling non-OEM/Siemens injectors requires dedicated tables & maps.

I experienced an interesting phenomenon recently; I replaced my aging O2 sensors and acquired improved performance & gas mileage (2mpg+) as a result. O2 sensors can become lazy without generating a fault code; some have attributed slow sensors to everything from collapsed ring lands on the lean end to sluggish behavior on the rich end.

it's easy enough to scale the injectors if you have the proper software to do it

Keith,
can you get me old O2 sensor connectors?

jan