hello all,
another question on my mind.
How much belt contact do you really need to drive the rover v8 water pump correctly.
I have the serp front cover on my v8 in a westfield, but the belt arrangement doesn't leave much belt contact to drive the water pump.
Just wondering if I should fit an idle pulley to make better belt contact for the water pump.
I recon at the moment the belt drive the pulley with less than 25% of the diameter of the water pump pulley.
cheers
scott
water pump pulley belt contact
Moderator: phpBB2 - Administrators
- Seight-V8
- Knows His Stuff
- Posts: 559
- Joined: Sun Jul 01, 2007 10:12 am
- Location: https://t.me/pump_upp
- Contact:
- richardpope50
- Gold Member
- Posts: 616
- Joined: Thu Jan 28, 2010 12:25 pm
- Location: Horsham, West Sussex
Hi Scott, yes and exactly the same as mine was. See 'lesson in oils' post and my woes of cooling. When I added an idle wheel to make the contact 50+% I'm sure it made a difference even though I could not see a shiny belt, I'm now sure it was slipping and thus not pumping enough water around.
(For those keeping up with my saga, I hope to be able to get out for a very long test this Tuesday. Cannot believe I've done about 250 miles this year - just so many things get in the way.)
(For those keeping up with my saga, I hope to be able to get out for a very long test this Tuesday. Cannot believe I've done about 250 miles this year - just so many things get in the way.)
Richard.
Dax Rush 5.0l TVR V8, EFI with Megasquirt ECU and wasted spark, Racelogic Traction Control and Quaife LSD ....... Now nut and bolt restoring a TR6
Dax Rush 5.0l TVR V8, EFI with Megasquirt ECU and wasted spark, Racelogic Traction Control and Quaife LSD ....... Now nut and bolt restoring a TR6
Impossible question really as there are so many variables between different engines and it is directly linked to the belt tension and friction coefficient.How much belt contact do you really need to drive the rover v8 water pump correctly.
All you really say is that the less belt contact you have the higher belt tension you need to transmit the same power.
They sell knurled versions of the standard serp water pump so presumably some people think even with the standard belt arrangement it could be marginal?
Most water pump pulleys you see of other V8 engines have nearly 180deg contact.
Tom.
Dax Rush 4.6 supercharged V8 MSII
- Seight-V8
- Knows His Stuff
- Posts: 559
- Joined: Sun Jul 01, 2007 10:12 am
- Location: https://t.me/pump_upp
- Contact:
I've done some reading up on this, and some info I found says you should have more the 60deg of belt contact, but like its been said, it is a hard one to work out.
I think personally I would like more belt contact, so will see if I can rig up an extra pulley somewhere...
I do have a spare alternator pulley, so maybe I can make a spare idle pulley from this, to give to more belt contact, but the space I have is very small.
regards
scott
I think personally I would like more belt contact, so will see if I can rig up an extra pulley somewhere...
I do have a spare alternator pulley, so maybe I can make a spare idle pulley from this, to give to more belt contact, but the space I have is very small.
regards
scott
- Ian Anderson
- Forum Contributor
- Posts: 2396
- Joined: Sun Nov 19, 2006 9:46 pm
- Location: Edinburgh
In the old days
V belt
Three pulleys, crank, water pump alternator
About evenly spaced so 120 degrees each.
A v belt used to be said was able to transfer 5 hp in this way
Ian
V belt
Three pulleys, crank, water pump alternator
About evenly spaced so 120 degrees each.
A v belt used to be said was able to transfer 5 hp in this way
Ian
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.