4.3 TVR Power speed 6

[WolfyJones]

Don1 said:

Dom, I can't imagine that you are saying that the TVR figures are honest and correct from the factory - we all know a good 4 litre is around the 360-370 bhp area. All the 4.3 in this list are over 410bhp.

And have extra mods fitted, air boxes etc,

I think potential customers just want to know what they get standard without all the extra cost of air boxes etc.

[chris watton]

WolfyJones said:

Don1 said:

Dom, I can't imagine that you are saying that the TVR figures are honest and correct from the factory - we all know a good 4 litre is around the 360-370 bhp area. All the 4.3 in this list are over 410bhp.

And have extra mods fitted, air boxes etc,

I think potential customers just want to know what they get standard without all the extra cost of air boxes etc.

Regarding the airboxes, I had always assumed they were not much more than engine bay garnish - even ACT on their website state that any performance gains are pretty minimal.

Regarding the cats, I would like to keep mine if they're still in good order - I find it hard to believe that de-catting gains an extra 50bhp - a whole VW Lupo!

Edited by chris watton on Thursday 23 January 20:12

[Tvr Power]

Don1 said:

Tvr Power said:

DJR 7 said:

Don1 said:

DJR 7 said:

So in a nut shell what's a realistic rear wheel figure for a 4.3 ?
The 1st post shows 370 bhp, I'm assuming that was with a standard air box, exhaust etc.
How much more could you squeeze with an ACT air box, de cat and big bore.
I am looking at having the 4.3 and I'd like to know what to expect

Sir needs to have a look at this Wiki - Modified Speed Six Wiki.

Thank you, interesting read

This sometime gets rather laborious do you all really think I would build a 4.3 engine that makes less hp than 4ltr red rose . come on fellas give me some credit , all the figures your see and you read from our rolling road are true irrespective to what other tuners state.. So in a nut shell our hp figures are at the wheels !

Dom

Dom, I can't imagine that you are saying that the TVR figures are honest and correct from the factory - we all know a good 4 litre is around the 360-370 bhp area. All the 4.3 in this list are over 410bhp.

I'd say that's a good return on money spent.

As for the rolling road / dyno lottery.... Sorry, that just doesn't wash. Getsis's car ran on your dyno and SRR one day apart, and the run was 1bhp difference. That sort of thing isn't luck. Besides, as we all know, it's not just about numbers.

What you have to take into consideration is how can one rolling road measures Hp figures at the wheels (dynojet) then the same car goes onto another rolling road that's not designed to measure at the wheels but calculates from the wheels to the flywheel hp in real time , it's mathematically impossible to compare both with in 1 bhp... So to say Dynojet & Dyno Dynamics are within 1% of each other is incorrect ...

Dom

[chris watton]

Hey, Dom - would your SP6 Throttle Spindle Bushing be a good thing to have along with the 4.3 upgrade, and are any of the old sensors changed? It would be daft to have what is essentially a brand new engine with 12 year old sensors keeping an eye on it......

[Tvr Power]

dpd3047 said:

Tvr Power said:

"Looking no good Dave " Prove your product and reliability on the track then people may take you serious or maybe not

dom

I Stick by my comments and the facts, if read what i said instead of jumping to conlusions, ive not said anthing about reliabilty or have said anything about your BHP figures.

Dave I've heard all your facts there no need for me to jump to conclusions ! See you Friday

Dom

[glow worm]

Don1 said:

Dom, I can't imagine that you are saying that the TVR figures are honest and correct from the factory - we all know a good 4 litre is around the 360-370 bhp area. All the 4.3 in this list are over 410bhp.

I'd say that's a good return on money spent.

As for the rolling road / dyno lottery.... Sorry, that just doesn't wash. Getsis's car ran on your dyno and SRR one day apart, and the run was 1bhp difference. That sort of thing isn't luck. Besides, as we all know, it's not just about numbers.

Where is this STD. non "S" 4 litre with Cats that gets 360-370 bhp at the wheels ???? I would like it . Even TVR never claimed that . TVR figures were always at the flywheel on a fine day with the wind blowing the right direction and even then the Germans sent the cars back .

[Don1]

Tvr Power said:

What you have to take into consideration is how can one rolling road measures Hp figures at the wheels (dynojet) then the same car goes onto another rolling road that's not designed to measure at the wheels but calculates from the wheels to the flywheel hp in real time , it's mathematically impossible to compare both with in 1 bhp... So to say Dynojet & Dyno Dynamics are within 1% of each other is incorrect ...

Dom

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

[WolfyJones]

chris watton said:

Regarding the airboxes, I had always assumed they were not much more than engine bay garnish - even ACT on their website state that any performance gains gains are pretty minimal.

Regarding the cats, I would like to keep mine if they're still in good order - I find it hard to believe that de-catting gains an extra 50bhp - a whole VW Lupo!

Look at Don1 RR numbers compared to other FFF engines, all down to airbox/exhaust mods,

I think that's right Don?

[Tvr Power]

chris watton said:

Hey, Dom - would your SP6 Throttle Spindle Bushing be a good thing to have along with the 4.3 upgrade, and are any of the old sensors changed? It would be daft to have what is essentially a brand new engine with 12 year old sensors keeping an eye on it......

If all is good leave well alone ,they don't always need re-bushing , as for the sensors they either work or they don't

Dom

[chris watton]

WolfyJones said:

Look at Don1 RR numbers compared to other FFF engines, all down to airbox/exhaust mods,

I think that's right Don?

...and the £3k+ Syvecs perhaps?

[WolfyJones]

chris watton said:

WolfyJones said:

Look at Don1 RR numbers compared to other FFF engines, all down to airbox/exhaust mods,

I think that's right Don?

...and the £3k+ Syvecs perhaps?

All 3 FFF cars on that list run syvecs, but Dons is in a different league power wise.

[Tvr Power]

Don1 said:

Tvr Power said:

What you have to take into consideration is how can one rolling road measures Hp figures at the wheels (dynojet) then the same car goes onto another rolling road that's not designed to measure at the wheels but calculates from the wheels to the flywheel hp in real time , it's mathematically impossible to compare both with in 1 bhp... So to say Dynojet & Dyno Dynamics are within 1% of each other is incorrect ...

Dom

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

Hub Dyno are very very good !

Dom

[WolfyJones]

Don1 said:

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

Getsis 4.5 394Bhp 370 lbft@ fly (SRR)
Jcpgasoline 4.5. 392Bhp 369 lbft@ wheel (Power)

Just luck.

[DAVEY DEE]

Dom,How about you give me a fantastic quote to rebuild my exchange 4l to a 4.3 then you can all see what a 4.3 speed6 does in a Cerb! Decatted with ACT cherry bomb exhaust.Be very interestig to find out how much difference there is,which theoretically would be down to the different airbox.All in the interest of science & free biscuits!

Help me Obi Dom Kenobi....

[Tvr Power]

WolfyJones said:

Don1 said:

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

Getsis 4.5 394Bhp 370 lbft@ fly (SRR)
Jcpgasoline 4.5. 392Bhp 369 lbft@ wheel (Power)

Just luck.

Come to Tvr Power and I'll take you out in an std car that makes 370 bhp at the flywheel , then I'll take you out in a 4.5 that you honestly think makes 392 hp at the flywheel, so you up for this ???

Dom

[glow worm]

Tvr Power said:

Come to Tvr Power and I'll take you out in an std car that makes 370 bhp at the flywheel , then I'll take you out in a 4.5 that you honestly think makes 392 hp at the flywheel, so you up for this ???

Dom

Now you've got me confused Dom, and you did my 4.5 ? and I saw loads of graphs from your RR with Jason... and some std 4 litres weren't even making 300bhp at the wheels
I thought Julians Tuscan 4.5 392 bhp was at the wheels from your RR. ????

Edited by glow worm on Thursday 23 January 21:07

[Tvr Power]

DAVEY DEE said:

Dom,How about you give me a fantastic quote to rebuild my exchange 4l to a 4.3 then you can all see what a 4.3 speed6 does in a Cerb! Decatted with ACT cherry bomb exhaust.Be very interestig to find out how much difference there is,which theoretically would be down to the different airbox.All in the interest of science & free biscuits!

Help me Obi Dom Kenobi....

Oh yes sounds good to me Rodney

Dom

[WolfyJones]

Tvr Power said:

WolfyJones said:

Don1 said:

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

Getsis 4.5 394Bhp 370 lbft@ fly (SRR)
Jcpgasoline 4.5. 392Bhp 369 lbft@ wheel (Power)

Just luck.

Come to Tvr Power and I'll take you out in an std car that makes 370 bhp at the flywheel , then I'll take you out in a 4.5 that you honestly think makes 392 hp at the flywheel, so you up for this ???

Dom

Why not just have a independent RR day and put this to bed once and for all.

[Don1]

WolfyJones said:

chris watton said:

WolfyJones said:

Look at Don1 RR numbers compared to other FFF engines, all down to airbox/exhaust mods,

I think that's right Don?

...and the £3k+ Syvecs perhaps?

All 3 FFF cars on that list run syvecs, but Dons is in a different league power wise.

I would ask for fairness, that we don't discuss a rivals product on Doms thread? But all published FFF cars run Syvecs, yes. Breathing is the only difference. (Sorry Dom, back to normal service!)

[Tvr Power]

WolfyJones said:

Tvr Power said:

WolfyJones said:

Don1 said:

I'll happily bow to someone who knows a damn sight more about this than me. So the numbers that were so close - luck?

Honest question here (not being sarky) - what about the hub type dyno? Does that measure it differently as well? I can imagine stuff like tyres, temp and other environmentals would make a large difference?

Getsis 4.5 394Bhp 370 lbft@ fly (SRR)
Jcpgasoline 4.5. 392Bhp 369 lbft@ wheel (Power)

Just luck.

Come to Tvr Power and I'll take you out in an std car that makes 370 bhp at the flywheel , then I'll take you out in a 4.5 that you honestly think makes 392 hp at the flywheel, so you up for this ???

Dom

Why not just have a independent RR day and put this to bed once and for all.

I'd rather take you out in person and let you experience the difference between rear wheel hp an flywheel hp. I'm sure your notice the difference , as many PHs say it's not just down to numbers...

Dom