Piper Cams BP270 rolling road

[clio_dude]

I was a bit unsure of whether to fit Piper Cams as even though they have been produced more power than 428's (see below), they have been known to be a little noisey - but as they are now supplied with a shim to keep the follower in range and keep them quiet I went for it!

http://www.cliosport.net/forum/showthread.php?460265-Piper-Cams-VS-Cat-Cam-428-(RESULTS)





It made 172bhp at the wheels with a V6 airbox, exhaust and cams - i'm pretty happy with this! I know it would have been better to rolling road it before - but I didn't..

 

[Andyman]

Do you have any info about this shim thing mate ?

 

[MartinR]

I don't mean to piss on your fire but that never made 172bhp atw or it would be some what 230bhp atf

 

[George182]

I don't mean to piss on your fire but that never made 172bhp atw or it would be some what 230bhp atf

How? If you assume transmission losses of 15% that means he is getting 198bhp ATF, even with 20% it's only 206bhp ATF.

it's probably a little high but not massively out?

 

[Grandpa Joe]

FLOL at 60bhp loss through the drivetrain...

How do you find it drives now? And what is your torque output/curve like?

 

[clio_dude]

They're now supplied with a shim that sits under the hydraulic follower to keep the followers in range and stop them tapping!

I don't know how you've calculated your transmissions losses Martin, but with 12% gives 192BHP ATF and 15% gives 197 BHP ATF.

I thought it would be flat lower down, but it still picks up as before and doesn't have a lumpy idle! It has a nive power curve, there is a dip in torque between 4500-4900RPM but then it continues to build - maybe an RS Tuner map would help.

 

[Lal B3N]

So have you not had it mapped to suit yet?

 

[clio_dude]

As far as I know it's on the standard map!

 

[Lal B3N]

Ah fair enough then, where you taking it to be mapped?

 

[clio_dude]

I was thinking of getting an RS Tuner, but i'm not sure whether it's worthwhile.

 

[Lal B3N]

I was thinking of getting an RS Tuner, but i'm not sure whether it's worthwhile.

Don't think an RS Tuner map will be worthwhile when you have cams fitted.

I would be getting it done custom by one of a few companies.

I'll be having mine done at RS Tuning in Leeds but I guess thats maybe a bit too far for yourself.

519 is probably closer to you I think.

 

[Dan@SJM]

Or mike from MWM...

 

[Lal B3N]

Or mike from MWM...

Knew there was another one.

 

[clio_dude]

I can't find a website for MWM, do you have any details?

 

[MartinR]

I never calculated anything it was just a stab in the dark still overeading though especially if its on the standard map.

Was it put on the rollers of the company that installed the cams?

 

[Russ_16v]

I'd not want to be driving hard without a custom map - have you seen afr's mate? If they are aggressive cams I'd imagine it may be running lean.

Oh and no to an rs tuner - pay for a proper custom map

 

[Lal B3N]

I can't find a website for MWM, do you have any details?

Drop him a pm.

http://www.cliosport.net/forum/member.php?51371-Michael-Woodford-MST

 

[Flat Eric]

Good figures, it'll be better with a custom map, get it sorted ASAP

 

[Fred@BTM]

160@wheels is approx 190@fly

172@wheels = approx 205@fly which is unlikley on cams

 

[clio_dude]

We did a fair few runs, the very lowest was 167, highest 172 ATW.

I fitted the cams myself, and YES I did use a pulley locking tool!

 

[Fred@BTM]

bascially every rolling road is inaccurate, always take the results with a pinch of salt! Just because it says your have 3000bhp doesn't actually mean you do!

 

[clio_dude]

I'm quite aware of that, I should have run it before fitting the cams etc.

 

[Fred@BTM]

you could go to 3 different rolling roads in the same day and see 20bhp difference LOL

 

[clio_dude]

I've run a few cars, and know of others who have on these rollers and they've all been in the right region. I agree to get a good comparison a run with the car standard is required..

 

[clio_dude]

I'll have to get someone 'in the know' to map it and see what they think.

 

[Dan519]

160@wheels is approx 190@fly

172@wheels = approx 205@fly which is unlikley on cams

looks like it is using a single roller, which always gives a lot lower losses, but higher ATW figure

 

[Grandpa Joe]

Out of interest were these reprofiled or billet?

 

[clio_dude]

These are reprofiled camshafts.

 

[clio_dude]

As:

http://www.pipercams.co.uk/pipercams/www/product.php?pid=R172BP270