Water Pump - alternatives
Discussion
HI
I have a LS2 engine, wanting to change how the belt is routed.
I will not be using the power steering pulley, or the standard alternator position.
Routing wiil be.
-Crank pulley
-Water pump
-removing the automatic belt tensioner and replacing it with a small alternator
-Using the low mount alternator bracket to allow me to use the additional pulley (which I will use the groved pulley from the automatic tension (rather than the flat pulley)
While I think this will work, I do not like the idea of the above set up as it seems more complicated, than I feel it should be.
The question (finally)
Is there an alterative water pump that I can use that only runs off the groves of the belt (rather than the flat of the belt). This would allow me to simplify the belt routing, using only the groves in a traditional 3 point of contact fashion.
-Crank pulley
-Water pump
-Alternator
Or does it need to be complicated.
I have a LS2 engine, wanting to change how the belt is routed.
I will not be using the power steering pulley, or the standard alternator position.
Routing wiil be.
-Crank pulley
-Water pump
-removing the automatic belt tensioner and replacing it with a small alternator
-Using the low mount alternator bracket to allow me to use the additional pulley (which I will use the groved pulley from the automatic tension (rather than the flat pulley)
While I think this will work, I do not like the idea of the above set up as it seems more complicated, than I feel it should be.
The question (finally)
Is there an alterative water pump that I can use that only runs off the groves of the belt (rather than the flat of the belt). This would allow me to simplify the belt routing, using only the groves in a traditional 3 point of contact fashion.
-Crank pulley
-Water pump
-Alternator
Or does it need to be complicated.
Why not buy an electric pump and then you can do what you like as the hub over the pump just spins freely plus you will gain power and enhanced cooling.
Or you can by pass it altogether.
http://www.thunderracing.com/catalog/?action=shop&...
Or you can by pass it altogether.
http://www.thunderracing.com/catalog/?action=shop&...
Can you draw out what you intend ? Its hard to picture.
You can buy various idlers etc that would allow you to perhaps change the path, but still retain the original workings.
If its a road car, I personally wouldnt choose an electric pump. They do claim to be very reliable....but they will never be as reliable as a mechanical pump.
You can buy various idlers etc that would allow you to perhaps change the path, but still retain the original workings.
If its a road car, I personally wouldnt choose an electric pump. They do claim to be very reliable....but they will never be as reliable as a mechanical pump.
Sounds interesting, I would make sure that I had a tensioner in the belt run. As the RPM goes up you need to have a moving part to allow the belt to expand and contract. I have watched many engines on dyno's and seen the amount of movement. Will have a look to see if I have a video to show you what I mean.
Kevin, I'm playing with my web page at the moment but look towards the bottom of the page on the left hand side at the frontal photograph of the engine. It's got the low slung alternator and was destined to have an electric water pump mounted inline.
http://www.chevroletls1.com/ls1prices_offer.html
I could install a tensioner. There is an adjuster but it's hard to see.
Boosted.
http://www.chevroletls1.com/ls1prices_offer.html
I could install a tensioner. There is an adjuster but it's hard to see.
Boosted.
Hi
Ringham - Given the choice I would prefer to avoid an electric waterpump.
My present car has one, and I have been let down by one already, I now carry a spare if I do a trackday or go on holiday in the car. Reason I have kept it on the car is because I had marginal cooling, and do like the extra cooling in traffic, but have always wondered how much bhp I have gained from lack of mechanical friction from water pump vs the additional strain from alternator powering the pump.
Wortec - Roger at the Autosport show also said this to me today. Will take this on board, but wonder how much of this is due to the long length of belt. If the engine under load stretches the belt by a percentage enough to cause tensioner to go to its maximum position. Would the percentage stretch from a shorter belt be enough to throw off belt.
Ringham - Given the choice I would prefer to avoid an electric waterpump.
My present car has one, and I have been let down by one already, I now carry a spare if I do a trackday or go on holiday in the car. Reason I have kept it on the car is because I had marginal cooling, and do like the extra cooling in traffic, but have always wondered how much bhp I have gained from lack of mechanical friction from water pump vs the additional strain from alternator powering the pump.
Wortec - Roger at the Autosport show also said this to me today. Will take this on board, but wonder how much of this is due to the long length of belt. If the engine under load stretches the belt by a percentage enough to cause tensioner to go to its maximum position. Would the percentage stretch from a shorter belt be enough to throw off belt.
I run a manual tensioner on both my accessory belt, and blower belt. I now have zero belt throwing problems....ever.
Make sure the pulleys are perfectly aligned, and there is adequate tension on the belt by whatever means.
Automatic tensioners are handy too, but by no means essential. I dumped my auto tensioner for the accessories, as it went soft and kept throwing belts. But when they work, they usually work well
Make sure the pulleys are perfectly aligned, and there is adequate tension on the belt by whatever means.
Automatic tensioners are handy too, but by no means essential. I dumped my auto tensioner for the accessories, as it went soft and kept throwing belts. But when they work, they usually work well
Boosted - This is the alternator mounting that I have, unfortunately I have a chassis bracing tube in the way.
Saw an alternator mounted on a car at Autosport show http://www.armin-schwarz.com/index.php?article_id=... that used the small denso alternator. Too late for me to use the grinder tonight, will have a look at this tomorrow to see if I can make this fit.
Saw an alternator mounted on a car at Autosport show http://www.armin-schwarz.com/index.php?article_id=... that used the small denso alternator. Too late for me to use the grinder tonight, will have a look at this tomorrow to see if I can make this fit.
Stevieturbo - not sure how I can draw this, not that good on PC
Could email you picture.
If you look at picture on Boosted site http://www.chevroletls1.com/ls1prices_offer.html
If you could imagine (in an anti clockwise direction) four points of contact.
-Crank pulley
-there is a Pulley wheel on the low mounting for alternator bracket (not the alternator)
-Water pump
-automatic tensioner to be replace with a daihatu charade alternator
Could email you picture.
If you look at picture on Boosted site http://www.chevroletls1.com/ls1prices_offer.html
If you could imagine (in an anti clockwise direction) four points of contact.
-Crank pulley
-there is a Pulley wheel on the low mounting for alternator bracket (not the alternator)
-Water pump
-automatic tensioner to be replace with a daihatu charade alternator
Check over in the Forced induction section of LS1Tech, and perhaps ask there.
Lots of those guys shift their alternator up to the high left location ( viewing the front of engine ). Most do retain PAS, but some might do away with it.
You can definately buy kits to remove the PAS on other cars, which is basically just a ribbed idler pulley.
A an example, a pulley to allow removal of aircon on some old US Ford.
http://store.summitracing.com/partdetail.asp?autof...
You could stick something like that to retain belt path around the water pump.
Lots of those guys shift their alternator up to the high left location ( viewing the front of engine ). Most do retain PAS, but some might do away with it.
You can definately buy kits to remove the PAS on other cars, which is basically just a ribbed idler pulley.
A an example, a pulley to allow removal of aircon on some old US Ford.
http://store.summitracing.com/partdetail.asp?autof...
You could stick something like that to retain belt path around the water pump.
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff