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General => The garage => Topic started by: jasonpi on 11 September 2003, 17:30

Title: 115bhp 2lr gti 8v mrk 4
Post by: jasonpi on 11 September 2003, 17:30
after a few mods i decided to get it on  the rolling road saturday gone..after a flawless run i was told that my car was producing 105bhp @ the wheels but i was not told the bhp @ the flywheel is there a way i can guess what its producing or is it more of an estimated guess?!
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: Slim Shady on 12 September 2003, 16:42
it's probably pushing 122 at the flywheel - its round about 12% lost through transmission for fwd and 33% lost thru 4x4.


Mine was pushing out 165 at the flywheel - so I figured I've got c150 at the wheels.
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: Glen on 12 September 2003, 18:22
165 out of an 8 valve?? How??
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: golfvr6 on 13 September 2003, 14:48
Thats a lot for an 8v? have you fitted a turbo??  ;)
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: concept on 15 September 2003, 14:15
mine was doing 140.5bhp at flywheel but only 95.5bhp at the wheels! ???

you can't just say that every car will be losing about 12%.

i would guess yours is doing more than mine at the flywheel. what have you done to it?
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: golfvr6 on 15 September 2003, 14:41
What you done to yours concept?
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: Slim Shady on 15 September 2003, 15:39
soz - mine was a 16v Mk2

sorry for the confusion - I was probably pissed when I posted   ;D
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: Slim Shady on 15 September 2003, 15:43
"mine was doing 140.5bhp at flywheel but only 95.5bhp at the wheels"

I understood that a std mk2 8v would push out 118bhp at  the flwheel and 100 at the wheel.

That was my rule of thumb - mk4 maybe a different kettle o'fish !!



btw - I guess fuelling has to come into consideration - my 16v was running so lean Grantmotorsport managed to get 12bhp thru mixture alone!!!
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: concept on 15 September 2003, 20:03
when i got these figures it was running original air box (with lots of plastic missing from it), mesh removed from air flow meter, kent cam and pulley, and powerflow system from cat back. i'm currently working on another engine for it!
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: golfvr6 on 16 September 2003, 09:30
25bhp extra out of cam and exhaust, what degree cam have you fitted?
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: concept on 17 September 2003, 23:33
cam - i don't know the spec of it. i'll check it out tomorrow as it's in its box again. think it was just the norm fast road jobbie. tweeking the pulley got +3bhp. powerflow exhaust made a big difference. i've now got cat bypass which has provided some more torque lower down and generally improved drivability
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: golfvr6 on 19 September 2003, 00:07
Naughty, you're not allowed to remove your cat  ;)
Title: Re:115bhp 2lr gti 8v mrk 4
Post by: jasonpi on 19 September 2003, 15:52
just decided to put air filter and exhaust in it and some guy did a fuel mod? when i took it down so not much really.... but i do want to put webbers into it is this possible and if so is it easy??? all answers on the back of a post card to me