Uberground?

[Rob77]

I'm thinking this can't possibly make a difference ... or can it?

http://cgi.ebay.com/ebaymotors/ws/e...0279736621&sspagename=STRK:MEWAX:IT&viewitem=

 

[talltimtam]

Good find !!!!!

I doubt it will make any differance to performance but I am sure some will differ...

 

[talbir]

I don't see how better electrical conductivity leads to less mechanical work for the laternator, which is the premise for the increased bhp.

If the alternator didn't have to work, then yes, more bhp possible through one less pulley, but no the case here.

Dyno runs have shown an increase of circa 7bhp by removing SLS pumps on 190e cosworths. but one can't run for long without the alternator....


talbir

 

[Deleted member 6183]

Underground, Uberground, Wombling Free,
The Wombles of Wimbledon Common are we.

 

[vincenz]

its to be used in conjunction with your electric air-intake

 

[stevesey]

I don't see how better electrical conductivity leads to less mechanical work for the laternator, which is the premise for the increased bhp.

Exactly what I was thinking - in actual fact isn't the logic the wrong way around, lowering the electrical resistance of all the circuits/lights etc will increase the current consumption and put more load on the alternator.

Aside from the obvious issues of running the engine the best way of reducing the alternator load would be to have no earth strap - and so no electrical consumers at all.

 

[GazCaff]

I can see some logic to it, if the original earth strap was deteriorating then there could be increased resistance there. I can't see it making as dramatic an improvement as suggested in the ad, but I'm sure it can't do any harm on an older vehicle.

 

[Dieselman]

The logic is that if there is a voltage drop caused by poor earth return to the battery then the spark output will be lowered so less bang for buck.

There is a theoretical gain to be made, but it wouldn't be anywhere near 7-12 bhp.

The alternator bit is cobblers.

 

[popuptoaster]

My mate runs his classic saloon car racer without an alternator, but then he has nothing to power really other than the engine and fuel pumps.

 

[stevesey]

The logic is that if there is a voltage drop caused by poor earth return to the battery then the spark output will be lowered so less bang for buck.

But plugs and alternator are earthed to the engine block no part in the HT side of things. Likewise the coil/coil packs LT return is earthed to the block they so will see the full LT voltage of the alternator. The only way I can see this would help spark voltage is if the coil packs were earthed to something the on chassis side of the earth strap (however that's potentially bad as if the earth strap fails you could end up with a lot of current trying to take that route).