Piper 285 cam

[anonymous-user]

Does anyone else have one of these fitted? My 4.0 does and I find low speed drivability a bit compromised by it. i.e. lumpy, etc

[clive f]

I had one of these in my 5lt griff, excellent cam, only changed it as wanted something with more oomph, give Jamie at Castle Race a bell, he likes pipers and will give good sound advice.

[blitzracing]

The piper 285 is designed for more power at higher RPM, so you do loose some low speed tractability and RPI dont recommend this cam unless you have the valves and porting to go with it. Slap it in a standard motor, you just loose the low end torque, but dont gain so much on the higher RPM as the standard breathing is restricted. The Piper 270 is better for the low down stuff on stock motors, but produces less peak power in the process.

Mark

[anonymous-user]

blitzracing said:

The piper 285 is designed for more power at higher RPM, so you do loose some low speed tractability and RPI dont recommend this cam unless you have the valves and porting to go with it. Slap it in a standard motor, you just loose the low end torque, but dont gain so much on the higher RPM as the standard breathing is restricted. The Piper 270 is better for the low down stuff on stock motors, but produces less peak power in the process.

Mark

Thanks for the reply, my Chim also has a Tornado chip. Do you think it would be worthwhile getting the cam changed for a 270 then?

[Bomber Denton]

BagOfOldRats said:

blitzracing said:

The piper 285 is designed for more power at higher RPM, so you do loose some low speed tractability and RPI dont recommend this cam unless you have the valves and porting to go with it. Slap it in a standard motor, you just loose the low end torque, but dont gain so much on the higher RPM as the standard breathing is restricted. The Piper 270 is better for the low down stuff on stock motors, but produces less peak power in the process.

Mark

Thanks for the reply, my Chim also has a Tornado chip. Do you think it would be worthwhile getting the cam changed for a 270 then?

Get it re-mapped??

[blitzracing]

People tend to think a remap is the answer to unleashing some sort of hidden power. This was true over the origional Range Rover mapping, but much less so with the TVR as they have already tried to get as much power out as possible, so any gains you will make will purely be on possibly removing flat spots, or improving fuel consumption. Its a very expensive way to go however. To get the best from your 285 you need to open up your ports / inlet manifolds,trumpets, fit larger valves etc. The 270 cam is pretty "soft", it pulls really well from low down, has very good mid range, and the power drops off at just over 6000 rpm, but it does not noticably "come on cam" like the origional TVR / kent cam setup does. The piper cams are designed to bolt onto the standard valve springs, so dont make the most use of much extra valve lift, that helps with low end power. Changing the cam is expensive, and in parts alone will cost around £350, but people on this forum seem to rave about the Stealth cam from V8 Developments.

Mark

[Bomber Denton]

blitzracing said:

People tend to think a remap is the answer to unleashing some sort of hidden power. This was true over the origional Range Rover mapping, but much less so with the TVR as they have already tried to get as much power out as possible, so any gains you will make will purely be on possibly removing flat spots, or improving fuel consumption. Its a very expensive way to go however. To get the best from your 285 you need to open up your ports / inlet manifolds,trumpets, fit larger valves etc. The 270 cam is pretty "soft", it pulls really well from low down, has very good mid range, and the power drops off at just over 6000 rpm, but it does not noticably "come on cam" like the origional TVR / kent cam setup does. The piper cams are designed to bolt onto the standard valve springs, so dont make the most use of much extra valve lift, that helps with low end power. Changing the cam is expensive, and in parts alone will cost around £350, but people on this forum seem to rave about the Stealth cam from V8 Developments.

Mark

He already has a tornado chip so a RR sesh could be a cheap remedy.

A big vote for the Stealth here also. :thumbup;

[anonymous-user]

Bomber Denton said:

blitzracing said:

People tend to think a remap is the answer to unleashing some sort of hidden power. This was true over the origional Range Rover mapping, but much less so with the TVR as they have already tried to get as much power out as possible, so any gains you will make will purely be on possibly removing flat spots, or improving fuel consumption. Its a very expensive way to go however. To get the best from your 285 you need to open up your ports / inlet manifolds,trumpets, fit larger valves etc. The 270 cam is pretty "soft", it pulls really well from low down, has very good mid range, and the power drops off at just over 6000 rpm, but it does not noticably "come on cam" like the origional TVR / kent cam setup does. The piper cams are designed to bolt onto the standard valve springs, so dont make the most use of much extra valve lift, that helps with low end power. Changing the cam is expensive, and in parts alone will cost around £350, but people on this forum seem to rave about the Stealth cam from V8 Developments.

Mark

He already has a tornado chip so a RR sesh could be a cheap remedy.

A big vote for the Stealth here also. :thumbup;

Rolling Road sounds like the way to go. Cheers!

[blitzracing]

It depends on what you want from a Rolling road session. I real terms theres very little you can simply alter, ASSUMING, all the things like HT leads, plugs, air filter etc are in good condition.Of course a rolling road should pick up if these things are faulty or wrong. Apart from that you can alter the timing, and fuel pressure if you have a variable pressure regulator, but that about it. The other tweeks like throttle pot position, and CO adjustment on the AFM wont do anything. (The CO adjustment is turned off on the catalyst map, although I have seen invoices for its adjustment from TVR dealers !). If you are thinking of a Mark Adams session, with the ability to tweek the Tornado map to perfectly match your engine, then more can be done.

Mark

[anonymous-user]

blitzracing said:

It depends on what you want from a Rolling road session. I real terms theres very little you can simply alter, ASSUMING, all the things like HT leads, plugs, air filter etc are in good condition.Of course a rolling road should pick up if these things are faulty or wrong. Apart from that you can alter the timing, and fuel pressure if you have a variable pressure regulator, but that about it. The other tweeks like throttle pot position, and CO adjustment on the AFM wont do anything. (The CO adjustment is turned off on the catalyst map, although I have seen invoices for its adjustment from TVR dealers !). If you are thinking of a Mark Adams session, with the ability to tweek the Tornado map to perfectly match your engine, then more can be done.

Mark

Cheers for all the info! very helpful. I find once the car is on the open road it has a fantastic mid-range. It's not undrivable at low speeds just a bit annoying sometimes and it's a bit lumpy. Luckily I don't have to drive the car everyday but a RR session is on the cards for the future (well once I get it back from the TVR Centre with new head gaskets)

[thegman]

any feedback on how the piper 285 compares to the V8D MC1?

[blitzracing]

Rob from v8racing did a good summery on various cams. I took his info, plus added my bit here:

http://www.g33.co.uk/tuning.htm

Mark