andrews 31g's
#1
11-07-2007, 09:00 PM
#2
11-10-2007, 08:25 PM
#3
11-10-2007, 08:42 PM
Extreme HDF Member
RE: andrews 31g's
Sporty: You would see better performance (IMO) for two-up riding bychanging the primary drive from 3.15:1 to 3.37:1 which was the stock final drive on EFI touring bikes from '99-'01 and is a simple swap of the compensating and clutch sprockets: parts cost $450 list from HD; ~$360 from a 20% off HD web dealer; labor about 1/2 a cam swap. It will raise the rpm at 70 mph about 200 rpms.
It's like in the old days putting a 4.11 gear into a car; same motor just multiplying the available torque faster.
However, with an '03 bike you probably ought to check the cam chain tensioners in any event. If they need to be replaced, the cam swap is essentially free (except, of course for the cost of the cams).
When I replaced the tensioners on my '04 FLHTPI, the stock cams were replaced with HQ-0034 cams; mild cam with .500 lift. It really woke-up my 88 and it is very quick. Don't know a thing about the 31G you are considering.
No cam swap is going to allow you to improve getting underway from a stop two-up. That's why I suggested the final drive gear change
It's like in the old days putting a 4.11 gear into a car; same motor just multiplying the available torque faster.
However, with an '03 bike you probably ought to check the cam chain tensioners in any event. If they need to be replaced, the cam swap is essentially free (except, of course for the cost of the cams).
When I replaced the tensioners on my '04 FLHTPI, the stock cams were replaced with HQ-0034 cams; mild cam with .500 lift. It really woke-up my 88 and it is very quick. Don't know a thing about the 31G you are considering.
No cam swap is going to allow you to improve getting underway from a stop two-up. That's why I suggested the final drive gear change
#5
11-11-2007, 08:54 AM
RE: andrews 31g's
ORIGINAL: Harleypingman
Sporty: You would see better performance (IMO) for two-up riding bychanging the primary drive from 3.15:1 to 3.37:1 which was the stock final drive on EFI touring bikes from '99-'01 and is a simple swap of the compensating and clutch sprockets: parts cost $450 list from HD; ~$360 from a 20% off HD web dealer; labor about 1/2 a cam swap. It will raise the rpm at 70 mph about 200 rpms.
It's like in the old days putting a 4.11 gear into a car; same motor just multiplying the available torque faster.
However, with an '03 bike you probably ought to check the cam chain tensioners in any event. If they need to be replaced, the cam swap is essentially free (except, of course for the cost of the cams).
When I replaced the tensioners on my '04 FLHTPI, the stock cams were replaced with HQ-0034 cams; mild cam with .500 lift. It really woke-up my 88 and it is very quick. Don't know a thing about the 31G you are considering.
No cam swap is going to allow you to improve getting underway from a stop two-up. That's why I suggested the final drive gear change
Sporty: You would see better performance (IMO) for two-up riding bychanging the primary drive from 3.15:1 to 3.37:1 which was the stock final drive on EFI touring bikes from '99-'01 and is a simple swap of the compensating and clutch sprockets: parts cost $450 list from HD; ~$360 from a 20% off HD web dealer; labor about 1/2 a cam swap. It will raise the rpm at 70 mph about 200 rpms.
It's like in the old days putting a 4.11 gear into a car; same motor just multiplying the available torque faster.
However, with an '03 bike you probably ought to check the cam chain tensioners in any event. If they need to be replaced, the cam swap is essentially free (except, of course for the cost of the cams).
When I replaced the tensioners on my '04 FLHTPI, the stock cams were replaced with HQ-0034 cams; mild cam with .500 lift. It really woke-up my 88 and it is very quick. Don't know a thing about the 31G you are considering.
No cam swap is going to allow you to improve getting underway from a stop two-up. That's why I suggested the final drive gear change
#7
11-11-2007, 09:38 AM
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11-13-2007, 06:58 AM
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