30 replies to this topic

[AstonVauxhall]

Crikey, this must have been an expensive project. 

 

Nice to see on a Monday morning nonetheless.

 

http://www.speedhunt...kspeed-calibra/

[SteveA]

Superb, that cockpit is a work of art.

[stu8v]

Seen it in the flesh, it's epic

[Madmitch]

What a fantastic bit of tackle!

[Ian59]

  

[chris_uk]

Only 310NM torque.. Thats cant be right surely.. Thats only 230ftlbs.

[CHILL Gone DUTCH]

Only 310NM torque.. Thats cant be right surely.. Thats only 230ftlbs.

It's a NA so it will be that kind of torque

[chris_uk]

Considering a standard 2.5 engine is 168bhp and 167ftlbs... I would of expected more torque than that at 500bhp... I just would of expected more.. Maybe its a typo and it means 310ft.. That would make more sence.

[Nev]

Considering a standard 2.5 engine is 168bhp and 167ftlbs... I would of expected more torque than that at 500bhp... I just would of expected more.. Maybe its a typo and it means 310ft.. That would make more sence.

 

The advert looks correct, it's easy to underestimate how high revs will yield high power, so long as you can push peak torque far down the rev range.

 

310 NM = 228 ft/lb

 

228 / 5252 * 11,650 = 505 BHP

 

Incredible engine though, quite amazing how they eeked that power out of it. It must have a volumetric efficiency substantially over 100%.

Edited by Nev, 07 November 2016 - 11:06 PM.

[chris_uk]

power is nothing without torque.

[The Batman]

mine seems to do alright with no torque

[Nev]

power is nothing without torque.

 

I bet the gearbox ratios are close enough that they will constantly remain in the 9,000 to 11,500 RPM band (in the dry with good traction), where torque will be almost the highest and power the highest. I wouldn't be surprised if it does 70 MPH in 1st gear alone, but there after the gears go up in relatively very small steps.

 

I guess some of you SC'ed kidz will disagree, but a race car that has to drive in the wet would want an area of the RPM band where torque is lower, so they can stay in control when traction is bad. The beauty of a rising torque line is that you can chose to drive at lower RPM (and hence lower torque levels) in the rain, but higher torque levels in the dry. This key point is something that seems to have eluded most of the SC'ed VX220 community, mainly as our cars have a great grip/weight ratio, so the problem is masked from you at your relatively low torque values of 200 ft/lb to 300 ft/lb or whatever. Once you get to 400 ft/lb and 500 ft/lb though it is a very serious problem as I and others with big torque engines have found!

 

Of course the modern programmable ECU that allows you to change the map easily/quickly is the best of both worlds, where you can cap the torque or power electronically prior to driving in order to cope with bad traction. This is why stuff like the Dutch s/w and the Adaptronic ECU I have is a great idea (so long as you regularly use it to suit the conditions).

Edited by Nev, 08 November 2016 - 07:22 AM.

[chris_uk]

SC Kidz..    

 

 

[AstonVauxhall]

After a little googling, that engine should be a Cosworth KF engine. 

 

Tiny bit of more information here - http://www.italian.s...rth/index5.html

 

Considering the iron block, 90KG's is quite impressive.

[Nev]

SC Kidz..    

 

 

 

I mean it well, as you are probably aware I'm quite pro supercharging in general, as it is simpler/easier to package and has less issues in general.

 

Turbocharged kidz are cool too though - innit ?!

Edited by Nev, 08 November 2016 - 10:42 AM.

[chris_uk]

mine seems to do alright with no torque

Apart from getting overtaken by an mg tf at brands..

Edited by chris_uk, 08 November 2016 - 11:02 AM.

[SteveA]

Come on Chris it doesn't count if Joe is pushing his car down the pit lane again

[ginek]

power is nothing without torque.

Eh, they are connected.

Engine torque values had started to be abused by corporate marketing when promoting diesel engines, then advertisement took off and for the last n years engine torque value is suddenly very important.

 

At the same time people keep forgetting there is transmission between engine and wheels and that actually torque on wheels (together with friction) moves a vehicle ahead.... Comparing engine torque values is relevant only where all the rest is the same (same car, same transmission), otherwise is uneducated, ignorant non-sense.

[chris_uk]

power is nothing without torque.

Eh, they are connected. Engine torque values had started to be abused by corporate marketing when promoting diesel engines, then advertisement took off and for the last n years engine torque value is suddenly very important.   At the same time people keep forgetting there is transmission between engine and wheels and that actually torque on wheels (together with friction) moves a vehicle ahead.... Comparing engine torque values is relevant only where all the rest is the same (same car, same transmission), otherwise is uneducated, ignorant non-sense.

my comment was just tongue in cheek.

[chris_uk]

Come on Chris it doesn't count if Joe is pushing his car down the pit lane again