Eight Valve Camshaft Blank?

[944 man]

Does anyone have an idea as to where I might find an 8v camshaft blank? Im tempted to try a 285 re-grind, but the non standard base cirsle is putting me off...

Simon

 

[barks944]

I would like to know this too, I remember a post a while back saying the source for them is highly guarded by the people that have them. I'm not even sure who has access to them, I think maybe John Milledge in the US

 

[944 man]

I suspect that we'd both be having the same grind if we could find one? The Bildon cams are what Id really like, but with the poor exchange rate they could easily cost £800 delivered and duty paid. James at Piper is adamant that theyll fit straight in, with the hydraulic tappets making up for the reduced base circle; and that theyll time up without a vermier cam wheel, but Im not convinced...

 

[barks944]

I have a spare camshaft atm, I would be willing to give a regrind a go. I spoke to the guys at piper at a ford show a few weekends back and they said a similar thing to me. They quote you a price?

Bilden cams?

 

[944 man]

£130, possibly £130 plus VAT. Bildon / JMEngines, the link I keep posting... 944 cams Bildon Motorsport

 

[barks944]

Ah right, didnt realise bildon was JM. Do piper know what the cam profile on the lux is like? I wonder how much they can actually change the profile with the 944's current cam. Its got no overlap on the intake cam, any idea how much they can change the profile by just taking off the base circle?

 

[barks944]

Ah bonus! Pipercams are in Folkstone and im working in Dungeness for the next 6 months.

 

[944 man]

James is adamant that Piper did a lot of work with Porsche 'back in the day'; and that only working profiles were retained in the file. I do see your point of course.

 

[barks944]

Are you saying that piper have a cam profile designed for the 944 engine in their files?

 

[944 man]

They have about 300 profiles and they have a couple of profiles suited to the 944 in the Porsche 944 file, according to the techie that I spoke to the other day. This appears to be a 285 duration grind: he is scanning and emailing me what he has on paper. He asked if he could fax it but I havent had a fax connected since 2003! If the email doesnt materialise I will dig a fax machine out of my loft...[]

 

[barks944]

Thats great, means we dont have to have a stab in the dark.

Heres a link to the original cam profiles for the 944 N/A and turbo:

http://rcpt.yousendit.com/726319211/cca332814351b273cf91fdffaf26307b

 

[AntB]

ORIGINAL: 944 man

They have about 300 profiles and they have a couple of profiles suited to the 944 in the Porsche 944 file, according to the techie that I spoke to the other day.  This appears to be a 285 duration grind: he is scanning and emailing me what he has on paper.  He asked if he could fax it but I havent had a fax connected since 2003!  If the email doesnt materialise I will dig a fax machine out of my loft...[]

If its any help - I have a fax to email number... your welcome to give Piper that and I can forward to you the email (will be a pdf)

A

 

[944 man]

Ant: thank you, I'll let you know. Tom: interesting. Theyre very steady profiles arent they? I wonder if JamesO would be interested in fitting one on his MAP MicroSquirt 2.7? He should be best placed to benefit from the improved breathing.

 

[924nutter]

Visit integral cams in the U.S. They ground me a stage one cam for rmy 924 turbo from a billet and it has the std base circle dia so no mucking about with shims.

Here the e-mail address. Steve Gruenwald [steve@integralcams.com] and they definitely offer 8 valve cams ground from a chilled cast iron billet because I just looked it up

The cam for my 924T came in at £355 including all duty.

 

[944 man]

Thanks John.. Itll be a good deal dearer now though, thanks to the poor exchange rate, Im sure.

 

[barks944]

Apparently you dont need to shim as the 944's tappets are hydraulic so will take up the gap. Certainly JamesO would be in a good position to get the best from the cam, I'm going to chip my DME along with my MAF converter and some work on the air filter box. One thing I'm not confident about is what effect this will all have on gas flow as I dont have much of a clue what I'm doing there. I think keeping the length of the intake tract the same is a good idea.

 

[JamesO]

Maybe, not sure its worth me chasing more power from the 2.7 as I have a 968 engine that I am gradually refreshing, although the engine probably wont go in until next summer. I might be tempted with a cam if the cost arent too high.
I may be wrong as I know very little about cam profiles but I understand the 2.7 has higher lift than the 2.5.

 

[944 man]

I cant find the answer to that, but Id be surprised if it was more than a few thou. All of the cams I can find have a maximum lift of around .473. The Piper profile manages over 500 and the duration is up from about 228°, to 285°. That got to be good for a conservative 20bhp, assuming that you can time the cam properly (and assuming that one click on the DME mixture will satisfy it too, if you dont have a replacement ECU).

eta: cost is £130

Simon.

 

[barks944]

How do piper think the cam will effect the torque across the rev range? I don't want to sacrifice all the low-mid range torque for peak hp's. Does the click on the DME richen up the injection in general? Whats it's design function? Anyone in the UK do custom maps for the lux or are you stuck buying a generic chip/replacing the injection system.

 

[JamesO]

I assume thats £130 plus a cam blank or do they regrind the existing cam? Less than 2 tanks of petrol bargin!