rolling roads

[gary@retro]

Yeah ..some under read ... some over read ... hence i said we would get an average.

And as you know .. the engine dynos in roush, HT's engine dyno and T&R rolling road all read within 1% of each other ..

A year ago you wouldnt accept any figure unless it was Sanspeeds

So i refer back to the question ..we will get an average figure as a base line ..

If anyone then takes their car to a set of rollers and gets a figure higher than the average on thier type of engine then they have either a blinding engine or the rollers may over read a tadge ..

But if its 20 ft/lb per Litre over ..then the rollers are well out ..

[mk1gaz]

Sanspeed reads a few bhp lower than Track n Road though doesn't it ? Doesn't the 300bhp/195ibs/feet 2.0 litre duratec engine kit (proven on Track n Roads rolling road ) read 30+bhp less on another dyno then ? Maybe this is only a rumour of course .

[rwdrs]

Yes rwdrs but a turbo is still a "power adder" and thus increases power and torque cos it stuffs the engine with extra air which it wouldn't normally recieve .

no, it's no different, as the increase in swept volume (cubic capacity) is the point of increasing engine size (more capacity = more fuel/air mixture) the only difference between fitting a turbo and increasing swept volume is the manner in which more fuel/air mixture is "forced in" as opposed to "drawing in" larger amounts under part vacuum as the piston has a larger surface area

[Darran]

a few more

Added.

Heres a few escort we know

Marks rs2000, Ron Harris 2.2 232bhp 180ish torque.

Mates mk2 ht 2.3 n/a cossy 258bhp 180ish torque on dyno.

another ht pinto 2.2 199bhp 169 torque on dyno.

Dave @ retro ford 2050cc duratec 270bhp 199torque

icky 2.3 duratec 2.3. 220 torque !!!

to add to the list!!!!
makes interesting read this thread!!

[Darran]

pud talk

Can't beat a bit of "pub talk" bhp banter

[mk1gaz]

no, it's no different, as the increase in swept volume (cubic capacity) is the point of increasing engine size (more capacity = more fuel/air mixture) the only difference between fitting a turbo and increasing swept volume is the manner in which more fuel/air mixture is "forced in" as opposed to "drawing in" larger amounts under part vacuum as the piston has a larger surface area

But fitting a turbo ups the "torque per litre" figuire by a huge margain compared to an engine without one doesn't it ?
So this 95ibls/feet a litre max reading is easily beaten with a turbo engine , they can probably make over 200ibls/feet a litre .

[mk1gaz]

Has anyone got a rollling road sheet for a top notch BDA / Millington Diamond / Warrior pinto etc etc then ? Interesting too see one of these motors compared to the usual ones .

[TimGR]

right, end of debate

You wish!

[TimGR]

So what is it with these Duratec figures - if believed, are they they only N/A rengines capable of betaing 90 ftlbs per litre (despite the best efforts of AMG and M power who can't match that) .

Check out the web-site I posed above - nothing beat 90 ftlbs.

[TimGR]

And the finest efforts of McLaren with their F1 supercar can't match the torque figures per litre of a tuned Duractc???

[TimGR]

ps I wouldn't have to post 3 successive posts if we didn't have this dumb 2 nanosecond time out for editing

[rwdrs]

But fitting a turbo ups the "torque per litre" figuire by a huge margain compared to an engine without one doesn't it ?
So this 95ibls/feet a litre max reading is easily beaten with a turbo engine , they can probably make over 200ibls/feet a litre .

The effect of a turbo is twofold, firstly; it increases the volume of air the engine "breathes" and when "on boost" will bring the CR up to over that of a n/a engine.

As we know, either of these strategies will increase power but in combination will of course have a far greater effect. Increasing CR increases the stress on the engine components exponentially, so that's why you should never just stick one on an engine with a "normal" 9 - 10.5:1.

[mk1gaz]

So what is it with these Duratec figures - if believed, are they they only N/A rengines capable of betaing 90 ftlbs per litre (despite the best efforts of AMG and M power who can't match that) .

Check out the web-site I posed above - nothing beat 90 ftlbs.

Tim i like your style . Deep down we all know that duratecs aren't no better than anything else (an engine is an engine) it's just the tuners hype to get everyone to buy one . The same thing happened when zetecs and XE's came out , the duratecs just another fad that will disappear as soon as the next whiz bang multi-valve shopper engine hits the streets in the next decade

[mk1gaz]

The effect of a turbo is twofold, firstly; it increases the volume of air the engine "breathes" and when "on boost" will bring the CR up to over that of a n/a engine.

lol , the effect of a turbo is onefold = it blows extra air into an engine and adds power + torque . This is why the 90ibls/feet (or 95ibls/feet whatever it is) a litre ceiling only counts on naturally aspirated engines .

[rwdrs]

lol , the effect of a turbo is onefold = it blows extra air into an engine and adds power + torque . This is why the 90ibls/feet (or 95ibls/feet whatever it is) a litre ceiling only counts on naturally aspirated engines .