Photobucket


+- +-

+-User

Author Topic: Final drive  (Read 280 times)

0 Members and 0 Guests are viewing this topic.

Offline Stooza

  • Full Member
  • ***
  • Posts: 152
  • Location: West Sussex
    • View Profile
Final drive
« on: October 18, 2012, 03:56:25 pm »
Ok, I have been offered the chance of a final drive from a 1.6 golf gti. Is this a good mod for a track day 16v? To be more specific, will it keep it on the boil on tracks without mega straights?
Mk2 2.0 16v GTi (built for track day fun)
Mk3 16v GTi (standard)
1970 1915cc type 1 beetle (rebuild on hold)

Share on Facebook Share on Twitter


Offline Robin_16v

  • Jr. Member
  • **
  • Posts: 70
  • Welcome to the JMR forum.
    • View Profile
Re: Final drive
« Reply #1 on: October 18, 2012, 04:25:00 pm »
That's a 3.9 final right?

I switched the 3.6 for a 3.9 in my 2y box, did worked well on a short track and second gear corners.

Offline chrismc

  • Jr. Member
  • **
  • Posts: 76
  • Welcome to the JMR forum.
  • Location: Highworth, Wilts
    • View Profile
Re: Final drive
« Reply #2 on: October 18, 2012, 04:33:34 pm »
It depends on the type of track.

I personally preferred a 3.67 in my 16v around Castle Combe, but for somewhere slower/road use then a 3.9 certainly keeps them on the boil better

1995 BB1 Honda Prelude 2.2 VTEC track hack
206BHP/153lbs/ft

2002 Accord Type-R daily driver

Offline Stooza

  • Full Member
  • ***
  • Posts: 152
  • Location: West Sussex
    • View Profile
Re: Final drive
« Reply #3 on: October 18, 2012, 06:00:09 pm »
Yeah, 3.9.. I will do more research, cheers!! :)
Mk2 2.0 16v GTi (built for track day fun)
Mk3 16v GTi (standard)
1970 1915cc type 1 beetle (rebuild on hold)

Offline JMR

  • Sr. Member
  • ****
  • Posts: 325
  • Welcome to the JMR forum.
  • Location: Plymouth / Saltash-Cornwall
    • View Profile
Re: Final drive
« Reply #4 on: October 18, 2012, 08:11:53 pm »
Id go 3.9 Stu.

Punch the ratios into a gear ratio chart...there's a few floating around on the net.

Std Gti ratios are 3.45, 2.12, 1.44, 1.13 & 0.91 and 0.91 if its a 16v box...0.89 if its 8v.

Pop in yr tyre size and max rpm and see what you get...look for around 35 in 1st, 60 2nd, 80 3rd, 105 4th 115-120 5th.

Offline Tim Moll

  • Sr. Member
  • ****
  • Posts: 266
  • Welcome to the JMR forum.
  • Location: Ripley, Derbyshire
    • View Profile
Re: Final drive
« Reply #5 on: October 18, 2012, 09:20:16 pm »
Stu,

IIRC another thing you need to be aware of is that the FD on an 8v and 16v box is not interchangable as the diff is a different dia 109mm vs 111mm, the input shafts are also a different dia.

Offline Stooza

  • Full Member
  • ***
  • Posts: 152
  • Location: West Sussex
    • View Profile
Re: Final drive
« Reply #6 on: October 18, 2012, 09:24:05 pm »
its the 020 box from an 8v. It's been fully rebuilt with the diff rivet arp upgrade. Good info guys, cheers
Mk2 2.0 16v GTi (built for track day fun)
Mk3 16v GTi (standard)
1970 1915cc type 1 beetle (rebuild on hold)

Offline chrismc

  • Jr. Member
  • **
  • Posts: 76
  • Welcome to the JMR forum.
  • Location: Highworth, Wilts
    • View Profile
Re: Final drive
« Reply #7 on: October 18, 2012, 09:49:34 pm »
Sounds good- ive heard the 8v boxes are tougher than the 16v's (a friend with a very rapid track 16v runs an 8v box with 3.9fd & quaife & swears by it)

I have killed 1 2y box purely from going to a 2L block from a KR :'(
1995 BB1 Honda Prelude 2.2 VTEC track hack
206BHP/153lbs/ft

2002 Accord Type-R daily driver

Offline Matthewten

  • Newbie
  • *
  • Posts: 1
  • Welcome to the JMR forum.
    • View Profile
Re: Final drive
« Reply #8 on: September 18, 2018, 05:36:08 am »
aware of is that the FD on a

 

+-Recent Topics

JMR Customer Cars