What does yours rev to?
Discussion
I've got a '99 500, about 39000 miles,all std AFAIK apart from a modded exhaust which was done at Fernhurst's before I bought the car from them.This is my first TVR and I'm not sure that its revving high enough or freely enough.At about an indicated 5200-5400rpm it sounds as if its run out of puff and revving it any more achieves very little in forward motion so I don't bother.I went out in Pebbledashes 500 and his seemed to rev happily around to the 6300 mark and didn't sound so strained.Is there anything wrong with my car?Also the warm (hot) weather has given it quite a pronounced pink at the upper rev limits.I did read that they could run weaker at the top end so is this linked/curable.It normally uses Texaco Super and fuel consumption is normal(22MPG mixed driving)Its due a service soonish and its still under warranty with Fernhursts.Suggestions please!!
Thanks
Scorcher
Edited to read..It neither seems any slower or any faster than any other Griffs I've mixed with on runs
>> Edited by scorcher on Tuesday 19th July 20:16
Thanks
Scorcher
Edited to read..It neither seems any slower or any faster than any other Griffs I've mixed with on runs
>> Edited by scorcher on Tuesday 19th July 20:16
Painey said:
Peak bhp on my std 500 comes at just over 5,100 so anything past that doesn't make sense. However, it will pull cleanly through 6k when needed. Not in 5th mind you, although I've certainy tried!!
It makes sense if you want to be closer to the max power RPM on an upshift?
Mine will rev to 6k and it has been better since the piper cam.
Scorcher, I'm pretty sure Pebbledash has an upgraded cam which would explain the free revving. Mine has a standard cam and will rev to 6000 without trouble but I only ever get there on track and only then if there's no point changing up (ie approaching a braking point). On the road I rarely go over 5000 which feels/sounds plenty enough.
They're all a bit different and it sounds like yours has lots of torque so I wouldn't worry about it.
They're all a bit different and it sounds like yours has lots of torque so I wouldn't worry about it.
GarryM said:
Scorcher, I'm pretty sure Pebbledash has an upgraded cam which would explain the free revving. Mine has a standard cam and will rev to 6000 without trouble but I only ever get there on track and only then if there's no point changing up (ie approaching a braking point). On the road I rarely go over 5000 which feels/sounds plenty enough.
They're all a bit different and it sounds like yours has lots of torque so I wouldn't worry about it.
yup, MC2 (the old 404h design) cam with stage 3 heads. Lost a tad of grunt over the standard cam etc, but improved mid/high end power. also very free reving
I think what Scorcher was refering to is that mine reves VERY freely to over 6k. it does not start too run our of puff before this.
I tend to use this part of the rev range with caution, ie only when I need it("interesting" overtakes and when on a mission) as it not doing many favours to the internals of the engine.
However I did notice with the STD Cam that once beyond 4.5k the motor was realy struggling keep going, getting less and less willing to rev as the revs got higher.
I have actualy bounced of the rev limmiter a couple of times with the new CAM
.
>> Edited by pebbledash on Thursday 21st July 15:25
I tend to use this part of the rev range with caution, ie only when I need it("interesting" overtakes and when on a mission
) as it not doing many favours to the internals of the engine. However I did notice with the STD Cam that once beyond 4.5k the motor was realy struggling keep going, getting less and less willing to rev as the revs got higher.
I have actualy bounced of the rev limmiter a couple of times with the new CAM
. >> Edited by pebbledash on Thursday 21st July 15:25
I must add that normal play time is limited to <5.5k as above this the engine is on a mission to destruction. if you wish to use this range all the time SERIOUS money is required to fettle the motor and one should expect to replace lots of parts.
I have not done all this, but as my CAM was shot and the heads cracked. So I opted to have them changed for non STD parts.
It is nice to have the motor now not become totaly asthmatic when the revs rise beyond 4.5k..
note however these cams can have a tendancy to be even more lumpy low down than the STD cam, the shunting that hapens on some 500's at low speed revs can become very anoying.....
>> Edited by pebbledash on Thursday 21st July 15:33
I have not done all this, but as my CAM was shot and the heads cracked. So I opted to have them changed for non STD parts.
It is nice to have the motor now not become totaly asthmatic when the revs rise beyond 4.5k..
note however these cams can have a tendancy to be even more lumpy low down than the STD cam, the shunting that hapens on some 500's at low speed revs can become very anoying.....
>> Edited by pebbledash on Thursday 21st July 15:33
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