Discussion
My 4.5 (now gone) had been on powers and Surreys rolling roads, the figures were almost the same. SRR say at the fly, power say at the wheels, you decide who are correct! but dont go by figures you need to drive a 4.5 back to back with a stndard engine car to realise the huge difference in performance.
TimJM said:
I think a quick trip to SRR would help settle this. If that comes back as 500bhp then we know all is fair with TVR Powers RR corrections/calcs. If it comes back with 414bhp (or close) again then somethings is very amiss at TVR Power (SRR being flywheel adjusted not wheels).
Why........sort what???
The man that's built Speed Sixes since 2007-ish, over 250 Versions of 4.3; racing 4.5's and now a 5.0 Ltr.
The RR outputs of TVR Power are a known entity, people just have some hang-up of seeing Rear wheel figures that will always be less than Flywheel?
Just add the correction factor - that is what the SRR does anyway???
Now that is contentious I'll agree - 15%, 18%, 20% or what - just depends on what state your transmission is in and on TVR Power's RR that's been taken care of?
Did suggest we were close to a bucket of worms......again
T
See here a long thread on the mapping of my old car:- http://www.pistonheads.com/xforums/topic.asp?h=0&a...
1 BHP difference from Powers to SRR, I would say the figures are the estimated flywheel. Power quoted is not at the wheels as proven by the thread above.
1 BHP difference from Powers to SRR, I would say the figures are the estimated flywheel. Power quoted is not at the wheels as proven by the thread above.
Getsis said:
See here a long thread on the mapping of my old car:- http://www.pistonheads.com/xforums/topic.asp?h=0&a...
1 BHP difference from Powers to SRR, I would say the figures are the estimated flywheel. Power quoted is not at the wheels as proven by the thread above.
I just read that and I am more confused now. It was the comment by Ryan that confused me:1 BHP difference from Powers to SRR, I would say the figures are the estimated flywheel. Power quoted is not at the wheels as proven by the thread above.
Ryan Griffiths said:
...
First of all i must add to my comment before about any dyno fudging while up at TVR powers on the intial mapping and i can confirm that TVR Powers rollers were bang on with what Charie@SRR said it would be in relation to his. So the remours about dyno fudging that were mentioned to me are incorrect.
Basically Charlie said what ever it makes at the wheels on the Dynojets like TVR Power is the same as the Flywheel power on a Dyno dynamics like SRR.
So on the first run at SRR it made 363bhp nearly identical to the 362bhp at Powers.
...
I'm not trying to suggest any fudging (Dom was the first person I took my 4.5 Cerbera to back in 2006 and has done more for the TVR world than most) I was just interested to know how the RR output one at the wheels and one at the fly can be the same and both correct.First of all i must add to my comment before about any dyno fudging while up at TVR powers on the intial mapping and i can confirm that TVR Powers rollers were bang on with what Charie@SRR said it would be in relation to his. So the remours about dyno fudging that were mentioned to me are incorrect.
Basically Charlie said what ever it makes at the wheels on the Dynojets like TVR Power is the same as the Flywheel power on a Dyno dynamics like SRR.
So on the first run at SRR it made 363bhp nearly identical to the 362bhp at Powers.
...
In my head (usually when in the pub) when somebody states an at the wheels number I automatically add 20% then take a little bit off to put that in comparative terms on what the engine is outputting.
Maybe I should just back away slowly...
I am not getting involved with arguments over things and I am not being rude either, I do not understand some things but all I can say is its a fecking world apart from the 3.6 I had in it 
so much more driveable less clattering, I knew there was not much more in it than the 4.3 but I decided to go for the 4.5 my choice, if you have never driven a TVR Power 4.3 or 4.5 then I would suggest you do then you will know why I love it, I have an engine with 5 years unlimited miles warranty if serviced by other TVR specialist or 100,000 miles no matter how many years it takes to get to 100,000 I do not recall any other TVR or manufacturer who offers that mind you I might be wrong, it will do for me
Nothing else upgraded, standard exhaust, standard ECU, it has cats, standard air box and induction,so not doubt if you wanted to start playing around them you will get more out of the engine but for now I am going to enjoy, I have spent the last year doing the car up , too much to put on here but lets just say it has more less been rebuilt so enough is enough time to enjoy
so much more driveable less clattering, I knew there was not much more in it than the 4.3 but I decided to go for the 4.5 my choice, if you have never driven a TVR Power 4.3 or 4.5 then I would suggest you do then you will know why I love it, I have an engine with 5 years unlimited miles warranty if serviced by other TVR specialist or 100,000 miles no matter how many years it takes to get to 100,000 I do not recall any other TVR or manufacturer who offers that mind you I might be wrong, it will do for me Nothing else upgraded, standard exhaust, standard ECU, it has cats, standard air box and induction,so not doubt if you wanted to start playing around them you will get more out of the engine but for now I am going to enjoy, I have spent the last year doing the car up , too much to put on here but lets just say it has more less been rebuilt so enough is enough time to enjoy
Excellent news billynobrakes... You have a T350 with the 4.5 in yeah ? That exhaust will restrict it a bit I would imagine compared to a Tuscan, so you've got great figures there.
All this Powers vs. SRR has been done the death...move on !
Really nice torque curve.... not much dip between 3000-4000 and over 300lbs/ft all the way from 3000... nice !
All this Powers vs. SRR has been done the death...move on !
Really nice torque curve.... not much dip between 3000-4000 and over 300lbs/ft all the way from 3000... nice !
billy no brakes said:
I am not getting involved with arguments over things and I am not being rude either, I do not understand some things but all I can say is its a fecking world apart from the 3.6 I had in it so much more driveable less clattering, I knew there was not much more in it than the 4.3 but I decided to go for the 4.5 my choice, if you have never driven a TVR Power 4.3 or 4.5 then I would suggest you do then you will know why I love it, I have an engine with 5 years unlimited miles warranty if serviced by other TVR specialist or 100,000 miles no matter how many years it takes to get to 100,000 I do not recall any other TVR or manufacturer who offers that mind you I might be wrong, it will do for me
Nothing else upgraded, standard exhaust, standard ECU, it has cats, standard air box and induction,so not doubt if you wanted to start playing around them you will get more out of the engine but for now I am going to enjoy, I have spent the last year doing the car up , too much to put on here but lets just say it has more less been rebuilt so enough is enough time to enjoy
I must start going to the same petrol station that you use so much more driveable less clattering, I knew there was not much more in it than the 4.3 but I decided to go for the 4.5 my choice, if you have never driven a TVR Power 4.3 or 4.5 then I would suggest you do then you will know why I love it, I have an engine with 5 years unlimited miles warranty if serviced by other TVR specialist or 100,000 miles no matter how many years it takes to get to 100,000 I do not recall any other TVR or manufacturer who offers that mind you I might be wrong, it will do for me Nothing else upgraded, standard exhaust, standard ECU, it has cats, standard air box and induction,so not doubt if you wanted to start playing around them you will get more out of the engine but for now I am going to enjoy, I have spent the last year doing the car up , too much to put on here but lets just say it has more less been rebuilt so enough is enough time to enjoy
I'll see in a few weeks if my 4.5 improves with the new ECU ... I'm nearly 50 bhp down on yours with a larger exhaust and ACT Airbox&Trumpets, I can't understand it 
. At least down from 9 to 3 penalty points on my license now. 
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