Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[STEMO]

And can we also have a discussion on how many RPMs to chuck on when holding the brake in the auto?

I'm presuming the stall speed of 2500rpm? But can I get away with any more and will it actually help?

Presumably, the more the merrier provided it doesn't cause you to break traction.  So, with a 2.5, about 6,000RPM should be just fine. 

Don't. He may break his car and then we'd never know the results of his experiment. Sigh........😞

[Webby the Bear]

And can we also have a discussion on how many RPMs to chuck on when holding the brake in the auto?

I'm presuming the stall speed of 2500rpm? But can I get away with any more and will it actually help?

Presumably, the more the merrier provided it doesn't cause you to break traction.  So, with a 2.5, about 6,000RPM should be just fine. 

That's kinda why I asked. I remember tb mentioning that to floor it would be to stall it. Though I remember getting rear wheels stuck in some mud on a farm once and I floored it and it wouldn't rev past 2.5k. I think that was the stall speed stopping me from going any further 

So I'm thinking 2.5k rpm???

[Nick W]

And can we also have a discussion on how many RPMs to chuck on when holding the brake in the auto?

I'm presuming the stall speed of 2500rpm? But can I get away with any more and will it actually help?

Presumably, the more the merrier provided it doesn't cause you to break traction.  So, with a 2.5, about 6,000RPM should be just fine. 

You actually want some wheelspin; so more revs than the stallspeed is necessary. Exactly how much will require experimentation. If you don't launch this way it will just lurch away from the lights and bog-down. You see this all the time at the track.


This is assuming that the car has enough power to overcome the tyres on a prepared surface. That might be asking a bit much from an automatic 2.5.

[henryd]

And can we also have a discussion on how many RPMs to chuck on when holding the brake in the auto?

I'm presuming the stall speed of 2500rpm? But can I get away with any more and will it actually help?

Presumably, the more the merrier provided it doesn't cause you to break traction.  So, with a 2.5, about 6,000RPM should be just fine. 

You actually want some wheelspin; so more revs than the stallspeed is necessary. Exactly how much will require experimentation. If you don't launch this way it will just lurch away from the lights and bog-down. You see this all the time at the track.


This is assuming that the car has enough power to overcome the tyres on a prepared surface. That might be asking a bit much from an automatic 2.5.

Hows he going to do that then?,thats the highest revs it can pull in gear with brakes on without moving

[Webby the Bear]

got to say, that was my understanding. I wont be holding on to the brake for too long anyway....as quick as possible actually so as to protect the tranny as much as poss. 

if I manage to get a dry day in jan, I want a cold day with no rain, right?

[TheBoy]

May struggle to find Michelin ps3's for the testing according to our tyre supplier. Anyone know a place that sells them.

Michelin, of their current stock, recommend the 'primacy' for my car. Are these similar tyres to the ps3's?

Double check, but I thought Primacy were their ecowank type tyre, PSx versions were high performance tyres.  If I'm right, they are completely different beasts - eco means no grip.

[Field Marshal Dr. Opti]

May struggle to find Michelin ps3's for the testing according to our tyre supplier. Anyone know a place that sells them.

Michelin, of their current stock, recommend the 'primacy' for my car. Are these similar tyres to the ps3's?

Double check, but I thought Primacy were their ecowank type tyre, PSx versions were high performance tyres.  If I'm right, they are completely different beasts - eco means no grip.

Ecowank.....It's worth checking the sidewall to see if your tyre is identified in this way.

[Webby the Bear]

Thanks TB/Opti,

definitely cant get hold of PS3s in that size 

what do we think is the nearest substitute for extra sportiness 

[TheBoy]

Thanks TB/Opti,

definitely cant get hold of PS3s in that size 

what do we think is the nearest substitute for extra sportiness 

The PS3's I had on TBE I wouldn't call "sporty". More "slippery".  But then, they were well over half worn at 5mm when I got them.

Certainly Mr Lazydocker wasn't happy with them from the passenger seat...

[05omegav6]

Thanks TB/Opti,

definitely cant get hold of PS3s in that size 

what do we think is the nearest substitute for extra sportiness 

The PS3's I had on TBE I wouldn't call "sporty". More "slippery".  But then, they were well over half worn at 5mm when I got them.

Certainly Mr Lazydocker wasn't happy with them from the passenger seat...

Has he warmed to the ones on his

[Webby the Bear]

Well the ballast weight will be in the rear. Hopefully that will compensate for a slippery tyre. Looking forward to the results 

[Webby the Bear]

Ps looks like the primacy hp is the only Michelin available in my size. May stick with my new set

[TheBoy]

Thanks TB/Opti,

definitely cant get hold of PS3s in that size 

what do we think is the nearest substitute for extra sportiness 

The PS3's I had on TBE I wouldn't call "sporty". More "slippery".  But then, they were well over half worn at 5mm when I got them.

Certainly Mr Lazydocker wasn't happy with them from the passenger seat...

Has he warmed to the ones on his

Mr Gixer seems to be getting on with his Michelins I believe, though the MPSS is not available in "standard" Omega sizes.

[Field Marshal Dr. Opti]

Many moons ago I seem to recall one one of the motoring magazines attempting to improve the 0-60 MPH of a 2 litre Cortina in a novel way.

The back wheels were lifted clear of the ground and spun furiously before  brutally making contact with the road surface again.

The result was a spectacular 'smoky' getaway that reduced the 0-60 MPH by a full second or more.

[Webby the Bear]

So.

I got everything sorted. Accelerometer en route. Thanks Nick.

As said before I'm going for a cold but dry day in Jan.

One thing that's crossed my mind. How much would a head or tail wind affect the time. Obviously I want the best time possible but I don't want it to be cos of this. So how would it affect it?