Experienced any useful after market upgrades ?
Discussion
I suppose we all cruise the ebay shops in search of those wonder upgrades which promise increased performance from our (now sluggish-feeling 
) Wedges. - Some interesting goodies on RPI and DJE sites. 
Naturally we'd have to assume the car is otherwise in good order and properly set up.
Has anyone done any mods/bolt-ons which have genuinely boosted power, without drastically increasing fuel consumption ?
My engine is a 95 Chimaera 400HC with double valve springs and 'Real Steel' 218/220 cam fitted about 6,000 miles ago (composite head gaskets).
Also matching ECU, set up for no cats
I have already removed the spare wheel, tools and targa panel from the boot.
) Wedges. - Some interesting goodies on RPI and DJE sites. Naturally we'd have to assume the car is otherwise in good order and properly set up.
Has anyone done any mods/bolt-ons which have genuinely boosted power, without drastically increasing fuel consumption ?
My engine is a 95 Chimaera 400HC with double valve springs and 'Real Steel' 218/220 cam fitted about 6,000 miles ago (composite head gaskets).
Also matching ECU, set up for no cats
I have already removed the spare wheel, tools and targa panel from the boot.
Yes - rule number one of tuning - make sure you can get Wide Open Throttle when you press the accellerator down. But that costs nowt.
A bigger engine with a supercharger did the trick for me, dunno about the fuel consumption bit though!
After that a set of decent grippy tyres, and mintex brake pads, so you can corner and stop quickly.
A bigger engine with a supercharger did the trick for me, dunno about the fuel consumption bit though!
After that a set of decent grippy tyres, and mintex brake pads, so you can corner and stop quickly.
grahamw48 said:
I suppose we all cruise the ebay shops in search of those wonder upgrades which promise increased performance from our (now sluggish-feeling ) Wedges. - Some interesting goodies on RPI and DJE sites.
Naturally we'd have to assume the car is otherwise in good order and properly set up.
Has anyone done any mods/bolt-ons which have genuinely boosted power, without drastically increasing fuel consumption ?
My engine is a 95 Chimaera 400HC with double valve springs and 'Real Steel' 218/220 cam fitted about 6,000 miles ago (composite head gaskets).
Also matching ECU, set up for no cats
I have already removed the spare wheel, tools and targa panel from the boot.
You'r gonna need a bigger engine. ) Wedges. - Some interesting goodies on RPI and DJE sites. Naturally we'd have to assume the car is otherwise in good order and properly set up.
Has anyone done any mods/bolt-ons which have genuinely boosted power, without drastically increasing fuel consumption ?
My engine is a 95 Chimaera 400HC with double valve springs and 'Real Steel' 218/220 cam fitted about 6,000 miles ago (composite head gaskets).
Also matching ECU, set up for no cats
I have already removed the spare wheel, tools and targa panel from the boot.
I went from a sorted 400 to a 450 & the difference in 'shove' feels huge. The longer stroke really gives these engines the grunt they need. The 500 is even stronger.
I have an Edelbrock Carb set up with a Mallory Unilte Dizzy. The car has been transformed with instant throttle response and good MPG. My plan is to switch the entire ignition to MSD with Captive Disharge with an upgrade to a new Cam but I'm not sure which one.
If the engine goes bang - I'll drop in a 4.5 using the carb set up which works even better on bigger engines.!!
If the engine goes bang - I'll drop in a 4.5 using the carb set up which works even better on bigger engines.!!
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
grahamw48 said:
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
On the exhaust: the setup is ok, if you go larger diameter you could reduce the back pressure to a level (that standard is already quite low on a TVR) that you loose power! So nothing to do here.) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
Haven't done anything to the standard 350i engine I have. Yes a K&N filter and an adjustable fuel pressure regulator (which gives better throttle response and the engine feels torqueier from less than the standard 3500 revs). Plan to change the cam, use composite head and valley gaskets in the future. But other more necessary to do's get in the way and driving of course.
Think this is the only stuff worthwhile on the standard 3.5 litre engine. Gasflowing and balancing would be nice, but cost benefit wise don't think it would bring a lot.
Keeping the RV8 in good nick and not losing out of the supposed standard bhp and torque is my first....
Rob
350zwelgje said:
grahamw48 said:
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
On the exhaust: the setup is ok, if you go larger diameter you could reduce the back pressure to a level (that standard is already quite low on a TVR) that you loose power! So nothing to do here.) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
Haven't done anything to the standard 350i engine I have. Yes a K&N filter and an adjustable fuel pressure regulator (which gives better throttle response and the engine feels torqueier from less than the standard 3500 revs). Plan to change the cam, use composite head and valley gaskets in the future. But other more necessary to do's get in the way and driving of course.
Think this is the only stuff worthwhile on the standard 3.5 litre engine. Gasflowing and balancing would be nice, but cost benefit wise don't think it would bring a lot.
Keeping the RV8 in good nick and not losing out of the supposed standard bhp and torque is my first....
Rob
stainless_steve said:
350zwelgje said:
grahamw48 said:
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
On the exhaust: the setup is ok, if you go larger diameter you could reduce the back pressure to a level (that standard is already quite low on a TVR) that you loose power! So nothing to do here.) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
Haven't done anything to the standard 350i engine I have. Yes a K&N filter and an adjustable fuel pressure regulator (which gives better throttle response and the engine feels torqueier from less than the standard 3500 revs). Plan to change the cam, use composite head and valley gaskets in the future. But other more necessary to do's get in the way and driving of course.
Think this is the only stuff worthwhile on the standard 3.5 litre engine. Gasflowing and balancing would be nice, but cost benefit wise don't think it would bring a lot.
Keeping the RV8 in good nick and not losing out of the supposed standard bhp and torque is my first....
Rob
Manifolds are just to close to the chassis to allow for any larger bored pipework.
Waynester said:
stainless_steve said:
350zwelgje said:
grahamw48 said:
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
On the exhaust: the setup is ok, if you go larger diameter you could reduce the back pressure to a level (that standard is already quite low on a TVR) that you loose power! So nothing to do here.) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
Haven't done anything to the standard 350i engine I have. Yes a K&N filter and an adjustable fuel pressure regulator (which gives better throttle response and the engine feels torqueier from less than the standard 3500 revs). Plan to change the cam, use composite head and valley gaskets in the future. But other more necessary to do's get in the way and driving of course.
Think this is the only stuff worthwhile on the standard 3.5 litre engine. Gasflowing and balancing would be nice, but cost benefit wise don't think it would bring a lot.
Keeping the RV8 in good nick and not losing out of the supposed standard bhp and torque is my first....
Rob
Manifolds are just to close to the chassis to allow for any larger bored pipework.
Then again, looking on here...maybe the Wedge narrower pipes aren't such a bad thing...certainly up to 300bhp (which few Wedges will reach in the real world).
http://www.mez.co.uk/TuningTheRoverV8-intro.html
http://www.mez.co.uk/TuningTheRoverV8-intro.html
stainless_steve said:
Waynester said:
stainless_steve said:
350zwelgje said:
grahamw48 said:
Hmm...logic would suggest to me that a correctly functioning EFI system would trounce an 'old school' carb though, (but I'd probably understand a carb better ) and surely that's why EFI has been widely adopted ?
On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
On the exhaust: the setup is ok, if you go larger diameter you could reduce the back pressure to a level (that standard is already quite low on a TVR) that you loose power! So nothing to do here.) and surely that's why EFI has been widely adopted ?On my own car, throttle response is pretty instantaneous with the hotwire EFI, so no complaints there, and easily spins the wheels in second.
She does about 20mpg in mixed driving.
I was wondering if anyone had for instance fabricated more efficient, larger diameter exhaust manifolds, like say the V8S forward facing ones ? Obviously re-routed too.
Has anyone actually had their heads properly ported and matched ?
...A kind of 'before and after' experience.
ETA..thanks for the info GV.
Edited by grahamw48 on Saturday 11th October 09:55
Haven't done anything to the standard 350i engine I have. Yes a K&N filter and an adjustable fuel pressure regulator (which gives better throttle response and the engine feels torqueier from less than the standard 3500 revs). Plan to change the cam, use composite head and valley gaskets in the future. But other more necessary to do's get in the way and driving of course.
Think this is the only stuff worthwhile on the standard 3.5 litre engine. Gasflowing and balancing would be nice, but cost benefit wise don't think it would bring a lot.
Keeping the RV8 in good nick and not losing out of the supposed standard bhp and torque is my first....
Rob
Manifolds are just to close to the chassis to allow for any larger bored pipework.
Weird someone bought this up - as I've just spend all day with a guy who's company used to make the exhausts for all TVR's .. (Blue Flame) ..
Done 500 miles in one day ..
Edited by rev-erend on Sunday 12th October 21:20
Nice chunky manifold pipes but that collector looks really vunerable. Could almost do with a bash plate!
The only mod's my SEAC has fitted is the ACT carbon plenum & trumpets. I don't know tbh what difference this makes...I'm guessing flowing more air..therefore more fuel, = more power, + higher fuel consumption.
Currently also having the chaps down at Barnet fitting my shiny new ACT exhaust system.
Can't believe i've missed this weekends glorious weather.
The only mod's my SEAC has fitted is the ACT carbon plenum & trumpets. I don't know tbh what difference this makes...I'm guessing flowing more air..therefore more fuel, = more power, + higher fuel consumption.
Currently also having the chaps down at Barnet fitting my shiny new ACT exhaust system.
Can't believe i've missed this weekends glorious weather.
Edited by Waynester on Sunday 12th October 21:40
Gave each other a wave, but nowhere safe to stop.grahamw48 said:
That's why I was wondering if anyone had tried forward exiting ones, as in later TVRs.
I've done this to my race car.you should be able to see them in some of the pics on this thread
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
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