change of cams?
Discussion
Looks like I'm keeping the Cerbera and so now I'm looking at upgrades.
The car is an early 4.2 and by all accounts a pretty good one. As far as I'm aware the only mods are decat pipes so I thought that over time I'd do the following.
Wheels (cos I have been offered some) to 17" race or speedlines or whatever they were called.
Suspension to whatever I can afford at the time (Nitrons if poss and poly bushes)
Engine, looking at Joospeed intakes and cone filters, I also read at some point that Piper were making a cam for them. I have emailed piper but had no response can anyone shed any light on piper or other replacement cams?
Not interested in lights at the mo as I don't like the new ones enough to justify the spend.
Any comments on the cams and any other things I should think about?
D.
The car is an early 4.2 and by all accounts a pretty good one. As far as I'm aware the only mods are decat pipes so I thought that over time I'd do the following.
Wheels (cos I have been offered some) to 17" race or speedlines or whatever they were called.
Suspension to whatever I can afford at the time (Nitrons if poss and poly bushes)
Engine, looking at Joospeed intakes and cone filters, I also read at some point that Piper were making a cam for them. I have emailed piper but had no response can anyone shed any light on piper or other replacement cams?
Not interested in lights at the mo as I don't like the new ones enough to justify the spend.
Any comments on the cams and any other things I should think about?
D.
Cheers Danny,
You are right the suspension will make the most difference. However the car is on early cams and so I suspect they will need changing at some point and the engine is in bits waiting for some parts so I thought if there was a cam kit with lots of good feedback then........you get my drift
Is no one doing engine remapping yet then? What can people like Joolz change with their software?
thanks
D.
You are right the suspension will make the most difference. However the car is on early cams and so I suspect they will need changing at some point and the engine is in bits waiting for some parts so I thought if there was a cam kit with lots of good feedback then........you get my drift
Is no one doing engine remapping yet then? What can people like Joolz change with their software?
thanks
D.
There are people out there working on the ECUs, but to my knowledge no one other than Cambell (C3RBA? on PH) has had a remap outside of TVR.
With cars that vary so much individually it would be stupid to think that the one map that TVR do works well for all the cars out there. Wouldnt suprise me if there were a few horses lurking about and a smoother power curve too.
With cars that vary so much individually it would be stupid to think that the one map that TVR do works well for all the cars out there. Wouldnt suprise me if there were a few horses lurking about and a smoother power curve too.
Campbell has not had his car remapped. Apparently just an adjustable fuel regulator. The standard mapping is probably very conservative, probably where a lot of gains for the red rose cars come from.
With the standard dealer software, you can only reset the adaptive maps, you can change the base mapping.
The easiest way is probably still to put an Emerald on, I'm sure Joolz is only too happy for someone to be a guinea pig!
Danny
With the standard dealer software, you can only reset the adaptive maps, you can change the base mapping.
The easiest way is probably still to put an Emerald on, I'm sure Joolz is only too happy for someone to be a guinea pig!
Danny
the emerald route is being done by someone I'm in contact with, hope to see some results soon but dave and karl are busy bees anyway.
There's still a feint chance on the MBE system becoming unlocked, but most interesting is someone I know who builds his own ECUs, ... big yay!
I contacted Piper about cams for the cerbie, but then i got into contact with the bloke who did the development cams for both the AJP8 and SP6 engines. You can have one of 5 alternative cam grinds for the AJP8, but at 1200 pounds a pair from blanks i thought better of it. the std cams are good for power to 6500 revs so little point in pushing that further up the rev range bearing in mind the fatally flawed inlet port design.
If Campbell had an adjustable regulator I hope they adjusted it down .. cerbies generally run too rich for max power believe it or not. On the rollers I use you can plot CO on the power graph, every time there's an area of rich running it loses torque, and there's plenty of rich running in the cerbera map.
There's still a feint chance on the MBE system becoming unlocked, but most interesting is someone I know who builds his own ECUs, ... big yay!
I contacted Piper about cams for the cerbie, but then i got into contact with the bloke who did the development cams for both the AJP8 and SP6 engines. You can have one of 5 alternative cam grinds for the AJP8, but at 1200 pounds a pair from blanks i thought better of it. the std cams are good for power to 6500 revs so little point in pushing that further up the rev range bearing in mind the fatally flawed inlet port design.
If Campbell had an adjustable regulator I hope they adjusted it down .. cerbies generally run too rich for max power believe it or not. On the rollers I use you can plot CO on the power graph, every time there's an area of rich running it loses torque, and there's plenty of rich running in the cerbera map.
You might find this interesting or you could look at a DTA or similar.
www.bgsoflex.com/megasquirt.html
www.bgsoflex.com/megasquirt.html
looks great .. pitu it's fuel only at the mo .. would mean running an omex or similar in tandem.
DTA is great, but expensive since you pay for loads of stuff you don't actually need, and the name of course.
All I'm after is a simple no-frills ecu, there must be one somewhere, even the emerald is going to be traction control and launch control ready, so surely it'll go up in price also? A good simple quick set-up ecu for 200 quid is what the market needs, so why doesn't anyone do it? .. well maybe we will
Surely WEDG1E must have some ideas for knocking up a cheap ecu?
DTA is great, but expensive since you pay for loads of stuff you don't actually need, and the name of course.
All I'm after is a simple no-frills ecu, there must be one somewhere, even the emerald is going to be traction control and launch control ready, so surely it'll go up in price also? A good simple quick set-up ecu for 200 quid is what the market needs, so why doesn't anyone do it? .. well maybe we will
Surely WEDG1E must have some ideas for knocking up a cheap ecu?
Joolz
I don't know a lot about the input's / outputs required for an ECU but if you can let me know what you want I am sure I can get something together. I guess the sensors all produce a voltage that the processor has to read then the processor needs to set some control voltages based on some logic that you would like to be able to setup.
Depending on the I/O requirements it might be possible to take one of our existing control boards, certainly the macro language will allow you to alter the control strategy as you wish.
Let me know if there is any interest.
Bob
I don't know a lot about the input's / outputs required for an ECU but if you can let me know what you want I am sure I can get something together. I guess the sensors all produce a voltage that the processor has to read then the processor needs to set some control voltages based on some logic that you would like to be able to setup.
Depending on the I/O requirements it might be possible to take one of our existing control boards, certainly the macro language will allow you to alter the control strategy as you wish.
Let me know if there is any interest.
Bob
davidd said: So if the car cannot be tuned via the ecu does that mean I can buy the joospeed intake kit for my 4.2 bolt it straight on and magically get some extra BHP ?
If so what is the price not including fitting jools?
D.
that's about the size of it, one of the ways tvr make the 4.2 supposedly less powerful than the 4,5 is to put an inlet manifold on with a waisted section in, plus poor detail finishing around the first curved section. the least hp improvement i've had is 12bhp, the best 19bhp (that engine made the highest torque ever seen on a 4.2 cerbie i've tested. However, it's only 5-8 percent increase, you'l NEVER notice that out on the road, it's for people who like to talk hp figures and in the grand scheme of things it's a piss poor way of making your car go faster, which is why I haven't done any for about 12 months. A set of springs at 160 pounds is much better value for money!
Joolz .. telling it like it is.
VYT said: Joolz
I don't know a lot about the input's / outputs required for an ECU but if you can let me know what you want I am sure I can get something together. I guess the sensors all produce a voltage that the processor has to read then the processor needs to set some control voltages based on some logic that you would like to be able to setup.
Depending on the I/O requirements it might be possible to take one of our existing control boards, certainly the macro language will allow you to alter the control strategy as you wish.
Let me know if there is any interest.
Bob
er .. well this is why I'm no electronics guru .. haven't a clue what you're asking here!!
but: yes there's various sensors which send back to the ecu, primarily you have a crank trigger, a throttle position sensor, a coolant temp sensor and air temp sensor. you can also trim any fuelling with an air pressure sensor and exhaust oxygen sensors.
the ecu then needs to drive a pair of ignition coils and also two sets of four injectors on a time (pulse width) basis - injector duration... since the fuel pressure is fixed this is how it changes the fuelling.
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