Is it new or an old one as they have a great reputation for starting most engines from cold and have been used successfully on v8 engined cars too

I always assumed (probably wrongly!) turbo charged cars turned over easier due to them having a low compression ratio

Im not too clued up on the difference between cold starting amps etc but apparently it can supply 680amps for the first 5 seconds, its got enough grunt to get my st engine into life as quick as my old mahoosive bosch battery anyway :)

yep was new fully charged etc etc. it does turn it over but just not enough for it to catch. the saab needs 500cca standard holding current not peek, plus i have the draw of 4 stupidly power hungry vw sequential coils, megasquirt 3, 4 huge injectors, a pwm idle valve, etc etc

the vw coil packs alone can make the lights flicker in test mode on full chat as each one has a built in igniter. i did think it was the supply cables to the starter at first but after replacing them for stupidly big 10mm core cables it didnt make a difference.

i have had 2 offers for it within 2 mins of each other. ideally i would like to test it on another car before i let it go just to make sure it is ok. i would rather it go back to the place i got it from than it go to someone i know and not be fit for purpose.