How to stop back wheels spining, 2 people in boot allready.

tire pressures?

 

Use a proper rolling road and you will have no problems!

 

Nobles ?

 

not easy to stop, try 3 people in boot!!

you could reduce the pressure a bit but not alot!!

 

the rollers are a bit odd reads about 280 bhp at wheels and when hit main boost at 4500 rpm just spins.

 

ok first power run done 2 peeps in back and 2 psi drop in tire pressure now time to advance timing

 

What you testing ?

Steve.

 

Well said

 

I thought Nobles was ok it has a nice cool room

 

A 24v cossie 4i

 

If the roller diameter is too small then you will end up with problems due to a small contact patch between tyre and rollers for instance.

Neil.

 

i see

what do you think its a 24v TT runing 16psi. the advance was never completed as One turbo failed and the gearbox lunched its self

 

bummer

putting more weight on the back end of a sierra does not help traction on a rolling road. all that you do is increase the negative camber and toe-in, and reduce the tyre's contact patch on the roller.

and a cool room does not necessarily make a good dyno room - one with sufficient airflow does.

 

so gents what power, take a guess

 

lowering the tire pressures help a lot foreihneRS, and The act temps started rising so the room was not working well

 

Unlucky sounds like a unsuccesful day

 

240@wheels?

Neil.

 

Neil, your powers of observation leave a lot to be desired .

I'd say 300bhp @ wheels before turbo lunched itself.

 

Acht its been a long day - some of us have to work, not ponce around trying to look pretty!

 

Got the full spec of the engine ?

Also any pics ?

What box and turbos are you using ?

Steve.

 

The settings of the RR should be able to be altered to decrease the amount of Wheelspin.

The Acceleration rate of the Rollers is set to load the car up, this can be increased so that the rollers have a better chance to keep up with higher powered cars. Well, on most RR's anyway. The consequence of this might be that there won't be enough resistance/load to allow the car to build full boost.

 

take it to a dyna pack equiped place no problems with wheelspin then

 

well mr rainbum and thanks to you and Phil

it made 460 bhp at 4900 rpm before it lunched it's self the one turbo siezed and the RR operator asked has a boost pipe droped off. no shit

 

This car cossie 4I

 

it was the one on the right if you must know

 

Excellent mate ...Top Boss=top company,pleasure to be of help and service.

 

Any other pics ?

Looks well clean

 

there you go cossie 4I

 

very nice!

big power at crazy low revs

 

you should see the graf, I will scan it tommorow the massive drop off

 

looks sweet, who needs YB

 

aye lol

 

very good figures mate shame bout turbo and box tho would be good to see the graph.remember this car i think from a magazine a few years back im sure.always loved the colour.

 

Dave that car is died, due to a skip lorry I must say the block in the new car is the same, Just had a txt saying the main bearings are not looking to cleaver. mabe due to reving at 6000 rpm for 5 mins does not help

 

lovely looking motor and conversion you got there M8

 

I wish it was mine its a mates, the thing is abit porly now though

 

I thought this car has a proper cossie shell ?

I think Fitz at Topboss owns it.

Steve.

 

Looks lovely .

 

its a proper cossie shell Cossie4i

 

quality!! 460 is a nice figure the car looks the nuts too