alpha drives and crossovers.....
#1
Guest
Posts: n/a
alpha drives and crossovers.....
I just got off the phone with CP Performance and was told that a crossover and my AlphaSS drive will not work well together. It seems the small impeller doesn't flow enough water at idle, and causes overheating.
Has anyone tried this setup before?
Has anyone tried this setup before?
#2
Ginger or Mary Ann?
Charter Member
What are you saying boatracer46?
Mark, That might be a circumstance where it might be better to go no bypass and use a restrictor to control flow? Why are you wanting to use a crossover? Stock setups are pretty hard to beat on non blown motors.
[This message has been edited by US1 Fountain (edited 02-26-2001).]
Mark, That might be a circumstance where it might be better to go no bypass and use a restrictor to control flow? Why are you wanting to use a crossover? Stock setups are pretty hard to beat on non blown motors.
[This message has been edited by US1 Fountain (edited 02-26-2001).]
#4
Guest
Posts: n/a
US1, I only want one cause everybody else's got 'em! Seriously, just thought I'd spring for some fancy add-on's. I finally paid the boat off and I'm trying to keep myself busy so I don't go out and buy a new boat! But, I might be easily pursuaded. Know any good deal on some 28 footers?
#8
Guest
Posts: n/a
I found this post using the search engine. The question about water pumps is this: Can a raw water pump be omitted if the water pickup is in the bottom of the hulls engine compartment? The boat is a 1974 Cigarette 28SS and the engine area sits low in the water at idle. I am not sure as how these boats came setup when new. This is a project I am working on and need all the help I can get!
#9
Gold Member
Gold Member
My Formula has an Alpha and thought of going with a crossover and a transom pic-up. Was told I would have to use a Bravo type raw water pump.
The impellor in the drive must remain in place and working since the water flow through the drive supplies some cooling for the drive oil too. One suggestion was to use it to feed a drive shower.
The impellor in the drive must remain in place and working since the water flow through the drive supplies some cooling for the drive oil too. One suggestion was to use it to feed a drive shower.
#10
Registered
Join Date: Jan 2001
Location: ST. Louis, MO, USA
Posts: 1,658
Likes: 0
Received 0 Likes
on
0 Posts
My guess is that a crossover with a thermostat and standard bypass would not flow enough water (I just ran into this problem on a chris craft engine). A no bypass, no thermostat system would work though but it would be hard to balance engine temp and water pressure.
An engine mounted pump would work. It can supply enough volume at idle to run through the bypass and engine with the thermostat open. You'll still need your original drive mounted impeller working to pump water through the drive to cool it.
The other possibility is to put pressure valve in the bypass line. This will force water through the engine at idle with the thermostat. I did this on the Chris Craft engine and it worked great.
BTW, dont ask where to get a pressure valve. I had to modify a part that's no longer available.
Gary
An engine mounted pump would work. It can supply enough volume at idle to run through the bypass and engine with the thermostat open. You'll still need your original drive mounted impeller working to pump water through the drive to cool it.
The other possibility is to put pressure valve in the bypass line. This will force water through the engine at idle with the thermostat. I did this on the Chris Craft engine and it worked great.
BTW, dont ask where to get a pressure valve. I had to modify a part that's no longer available.
Gary