Hello I am new to this.
Firstly I have a 1988 VW polo coupe which has been in the family from New (Grandfather). It started life as a 1.1 litre. I have bought a 1.3 doner polo complete and I have had the 1.3 litre engine done up professionally. I have been told it will put out approx. 150bhp so I need to put this power to the road via a gearbox and drive shafts.
Can anyone recommend a suitable gearbox and drive shafts for this job without too many modifications and possibly a braking system. Is standard Polo G40 bits the answer.
I would appreciate any help on this matter including possible parts for sale?
Regards
Ciaran - N. Ireland
Hello!
I assume this is a G40 engine already if they reckon it'll make 150bhp?
You can use a standard polo gearbox and driveshafts with that much power (assuming a similar figure for torque in lb/ft).
cheers,
Paul.
If it is not forced induction (turbo or supercharged) it will not be 150bhp in fact id be suprised if it was over 100.
Standard G40 parts will be the same as most polos for driveshafts and a g40 gearbox will be a hard thing to get ahold of and expensive. a 8p code gearbox will give you better ratios for drivability than most standard boxes - but only the G40 boxes have more robust gears and all other boxes are just the same in terms of strength.
Braking system can be uprated using vented discs and calipers to suit and these can be found on mk1 golfs or using VW11 calipers and your existing carriers.
they will be the same diameter rotor however at 239mm.
Vauxhall calipers are also an option and i recommend you join clubpolo.co.uk for more information.
Thanks for the information. the polo engine is a 1.3 standard non-supercharged. I'm nor exactly sure what is done to the engine but I assume it will be ported and polished and head skimmed ect. I haven't got a BHP report but once I do I will post up photos and report.
I think I will try and source a G40 gearbox and shafts.
If anyone has one for sale let me know.
Thanks Ciaran 07743516982
I can't believe that 150bhp would be even remotely possible unless you are going very very silly and spending mega money. I would say 100 at most and even that I would be surprised. The highest (None Supercharged) output was the 3F engine out of the Mk2f GT. This was fuel injected and made 75 bhp and with some money can reach 100bhp.
I would ask them what they actually have done and fitted to make that amount of power. Also how much are they charging for this?
The G40 gearbox is no stronger than any other gearbox and the drive shafts are the same on all cars.
Quote from: mark_crox on January 12, 2015, 12:31:15 PM
The G40 gearbox is no stronger than any other gearbox and the drive shafts are the same on all cars.
So the only difference to an ATV and AHD box are the ratios and scene tax? Just the final drive that works best with the G then?
Quote from: mark_crox on January 12, 2015, 12:31:15 PM
I can't believe that 150bhp would be even remotely possible unless you are going very very silly and spending mega money. I would say 100 at most and even that I would be surprised. The highest (None Supercharged) output was the 3F engine out of the Mk2f GT. This was fuel injected and made 75 bhp and with some money can reach 100bhp.
I would ask them what they actually have done and fitted to make that amount of power. Also how much are they charging for this?
The G40 gearbox is no stronger than any other gearbox and the drive shafts are the same on all cars.
Not strictly true; there's 2 lengths of shaft (although diameter etc remain the same- found on later spec cars)
The G40 diff is a bolt on FD - presumably for strength!?
Mark is right regarding the gears though, they're all made from an alloy involving large quantities of chocolate.
Sorry I did mean that the shafts not stronger/beefed up for G40's rather than length.
But true I never thought about the bolts. They must be there for strength unless they where hand build but I suppose even then they could have used a rivet. ???