Pete,
Have you finalised your your fix for the jerky throttle at low speed?
Would have to be one of the best possible improvements to a puma's driveability..
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Pete,
Have you finalised your your fix for the jerky throttle at low speed?
Would have to be one of the best possible improvements to a puma's driveability..
Quote:
Originally Posted by Beery
Yes mate all finished and ready for use :D It does as the proble suggests smooth out the delivery and keeps thing very smooth under 80% throttle,, from 80% throttle upwards we just demand full power RPM dependant.
This gives the best of both worlds, smooth in slow speed and towns as well as full power on full pedal when needed.
Regards Pete
How reliable is the 2.2 puma with your tune. I'm doing a front mounted cooler and a full 2.5 inch turbo back exhaust.Quote:
Originally Posted by B-A-S
I've been told around 160-170 horse power and around 440-460 torque.....are these figures considered to be safe on a otherwise standard 2.2?
How confident are you in the engine with your tune?
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Im happy with the tuning level and prodivind the car is maintained correctly and serviced with the correct oils and not somthing that claims to be correct then you wont have any tuning related problems.
We have over 40 rally cars all runnng the same level of tune worldwide and so if their ever was an abusive test bed its those cars. The cars range in all climates from cooler to the hotest places and so all sinarios have been covered already.
As for the exhaust change, it will give you nothing more power wise than with the standard exhaust though it will allow gas to pass better and give some exhaust note.
ADVICE. do not use a straight through pipe system, it will cause problems and the turbo will over speed at high revs as the lack of back pressure what IS required by the turbo will have gone. If anything it will be the wrong modifications that cause the car problems overall.
Regards Pete
Thanks for the prompt reply Pete.Quote:
Originally Posted by B-A-S
I would have thought that the exhaust would contribute to a quicker spool up and better mid range torque.
I'm getting my car done by Bruce Davis performance, I think he uses a alive tune. Maybe you should contact him about potentially selling your tune.
Anyway thanks again for the info
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Quote:
Originally Posted by 1nando
That is the exact gain and problem all in one. The free flow exhausts allows the turbo spool faster... BUT the free flow exchaut also allows turbo over spool or over speed!!. Especially so when the back pressure is none existant.
Do you know if Bruce Davis performance has the back pressure measuements V rpm for the standard car V his exhaust ?
For genuine non DPF cars I do not have the exact standard data for as in the UK we do not have them but I strongly suspect it will be the same as a DPF car and the designed restriction is within the CAT front box.
My advice is remove the centre and rear boxes only unless the full turbo back system has a simlar matching back pressure of the standard system or it could induce problems.
Regards Pete
Quote:
Originally Posted by B-A-S
So Pete, would the centre and rear mufflers alone provide enough back pressure if the cat was removed?
If im totally honest,, removing the cat only and or DPF does not make any difference to the power of the car at this level of tuning, it will allow some noise difference and leaving the standard centre and rear boxes in place should help keep back pressure up a little yes.
But really all for no real gain in perfomance and only noise.
Regards Pete
Fair enough. I was thinking more along the lines of keeping exhaust gas temperatures down and removing a heat source from the engine bay to help in hot weather i.e. 40-50 degrees
You might want ot consider exhaust wrap, so far my experience has been very successfulQuote:
Originally Posted by Beery