DanS

Just wondering what factors or components can have an adverse effect on the transmission loss between flywheel and the power output at the wheels. Other than the gearbox, clutch and flywheel what else can have an effect? for example faulty wheel bearings, bad wheel alignment tyre pressure, wheel size, warn drive shafts etc etc?

Cheers!

Dan

c6mby

get a proper car lol

keithG666

you beat me to it

DanS

c6mby

i cant talk mine just over heats dont think ill ever get her running right let alone ont he rollers again

Stavros

No alternator, powersteering, etc etc

Straightcut gears in gearbox.

Changing a 4x4 to RWD.

And not beliving G-Force RRs massivley OTT transmission loss calculations

c6mby

can u run with no alternator and battery??

Ryan

no

c6mby

they do in races

Ryan

how do they get a spark? for the spark plugs?

Stavros

indeed, dont see a single battery or alternator on them horses on the grand national, and look at em go

c6mby

pmsl

Jon ERST S2

I thought some race cars just had a battery(i.e no alternator) with enough power in for the race i.e if they stall it though they are fooked??

Ryan

how the hell can a spark plug work with no battery

c6mby

thats wat i ment i think LOL

Stavros

Dont some racers run alternator only (which gives enough power to run the ign and managment etc), and use a external battery to start it before the race?

Ryan

i guess you can have either or, but you would need one of them.

a battery is only a storage unit, so i guess the alternator thing would work.

c6mby

i thought id herd of cars with no battery and no alternator in races but maybe im wrong???

MWF

Mini Miglia's run dynos instead of alternators and batteries.

Oranoco

What were your figures Dan?

Would like to know for comparison.

Mine were

249bhp @ flywheel
220bhp @ wheels
265lb torque

Be intresting to compare as they were both run on the same dyno

DanS

mine was..

276.9bhp @ fly
276.7 lb/ft @ fly
224.5bhp @ wheels

But

on the first run
261bhp @ fly
195bph @ wheels ????

.... massive loss aint it Which is why i wanted to know if theres anyway to reduce the effect. After all, how fast you go on the road is only how fast the wheels are turning lol.

Jon ERST S2

Doesn't the transmission need warming up?

DanS

another question... (take my first run as the example)

How can a car with the same gearbox with less bhp @ the fly possibly get a) far better power at the wheels? b) have over 25bhp less loss (lol) from flywheel power to wheel power?

Catch my drift? :P

Jon ERST S2

One of my recent runs I got the following:

254.6 @ fly
210ish @ wheels
loss = 44.6

285.9 @ fly
235 @ wheels
loss = 50bhp

Oranoco

This was part of my concern Dan mate.

I was expecting to see far greater transmission losses on mine as the gearbox was new and therefore I would have assumed would be quite tight thus increasing the loss.

Take your sheets with you Monday night mate and I'll bring mine. It'll be interesting to compare things

DanS

Not going on monday as the footie is on.

I'm going to SCC next saturday if you happen to be down that way.

CliffRS4

iTrader: (1)

Might have to meet you there if it's next saturday and not this one.

Switch

mm a little meeting a scc, might have to attend meself

CliffRS4

iTrader: (1)

Hell yer us lot haven't met for a while, besides Scott you owe me £5 and I never forget shit like that

If you don't turn up I'll know why

zoso11

well we run the class 10 with no alternator, we have a red top racing battery, needs chargin after every meeting, or sumtimes ova nite at a 2day meeting. And we run flat out in 2nd with 2 yamaha r1 engines.. 8 plugs 2 power.. 2 ecu's, 1 brake light.. well alot really..