i you were to have a 550bhp engine, with standard ratios in the box and diff, what is the car geared to do top end?????

 

i thought it was nearer 170

 

it will hit the rev limiter in 5th easily!

A 330hp RST wil nigh on crack 170...

 

depends on the revs / wheel size..

 

235mph

 

is that all?

my 204bhp cossie managed 350mph running on 3 cylinders.

 

What?!

Seeing as Christian has done 168.8 within the confines of brunters 2 miles i cant see ur point

 

With an appropriate rev limit set, that is indeed the correct answer as to what it would be geared for.

 

Depends on the Rev limit.

Steve.

 

Tell me the tyres/Wheel size + Rev Limit & I will tell you exactly what it should do.
A correctly geared 550bhp 3 dr Cossie will hit about 183mph within the confines of Brunters. Bruce Reed did 182.6mph there in a 3dr with a Dynoed 541bhp.
Rod

 

205/45/17 i think, defo 17 though, i susopse the engine will rev limit near 7500. as its still on hydrolic lifters, (need to dicch them if anyone knows where i can get solids)


thanks rod

 

205/40/17s, standard diff + 7200rpm Rev Limit

Thanks

Steve.

 

i would like to see 156.9 if i ever did it in mine.

 

8k limiter on 235/40 17's is 195mph.

would need a bout 650 to hit that at brunters tho.

 

170mph

 

I did 168mph going on the GPS....that was with 18's.

 

Thanks Mike

Steve.

 

205/40/17 tyres on a 550bhp 3dr?

What about a 420bhp 2wd Saph with standard box and diff, 7200rpm limiter, and 235/40/17's. Just out of personal interest.

 

More than 170mph

Steve.

 

you sure rod?...my 3door did 183mph and was only around the 500 mark

 

Sorry Kev .

Kev is totally correct I had forgotten his record run. 183mph with standard brakes if I remember correctly , so perhaps 185 is possible in a 3dr with 550bhp. MADAde did 185.5 with 550bhp in a Saff.
Rod

 

Tyres 205/45/17, if you could pull 7500rpm (maybe past peak Power) that would be 181mph.
Tyres 205/40/17, with 7200rpm limit is 168mph.

 

the engine will rev to 8 with no trouble on normal lifters etc

 

True, but holding them at that speed and they go WAY beyond their efficiency range and sound like a bag of spanners afterwards, as all the oil gets pumped out of them if held too long at these kind of revs. Obviously they recover again, but it is not an ideal situation for a high revving engine, as you only have to visualise what is happening to the springs with the lifters locking...

 

where can i et solids????

 

I have never had any trouble on my engine Mike....it has always sounded sweet after any held runs on the rollers or top speed runs.

Maybe I am just lucky

 

yer but my lifters are wanked anyway, they sould like a bag of nails from start up lol. if im gunnna strip it all down and repalce them i might just a well go solid then its done and i can push it hard if i feel the need

what boost are you running at 8k

 

2.2bar at the limiter

 

shite thats alot, crank and rods can't be standard are they??

 

yeah

 

It's not just a matter of the lifters, you then need to change the cams to suit this type as well.

The benefit of running solids is that you can run MUCH more aggressive cams, due to removing the compromise you have to have on the lobe shape when you run hydraulic ones.

With the cam timing swung, I could move my peak power up by 500rpm to take it from 7500, to 8000, purely because the cams and solid lifters can do this .

 

fair play mate

 

i've got db16 inlet and exsaust, double springs and v pulleys. do you think its worth it with that set up

 

It depends ENTIRELY on where you want the power band to start and end.