IME, at least in performance applications, there has been no performance advantage which I could discern, pertaining to the stock aluminum and CI pumps. There is a minor weight advantage from using the alumimum pump but an early timing cover is necessary to clear the open impeller. The main changes I made for more performance (at high rpms) was slowing the water pump and alternator down, since, with more rear gear, the engine was spinning faster at any given road speed.
Can't comment on the aftermarket aluminum pumps as I've never used them. Until I went to a marine pump on the race car, I always used stock pumps (with motor drives) with good success. Other VMF'ers have used these units and a search of the archives should bring up their opinions, mostly positive IIRC..
My street vehicles have always used stock pumps with good service and performance.
I knew I could count on y'all for helping out! I happened to have already powdercoated a 65 cover, so I'll use it for the pump. (Actually, I PC'd everything that would fit into the oven!) Thanks for all the help!
Wanted to ponder a question across you guys. (My car is at the body shop, so I'm loosing my mind waiting for it to get done)
In the terms of performance from the 289, a good 4b carb and intake is a gimmie.
But what's the 289 biggest weakness? My wild guess would be the heads?
Just curious for...
Getting around to test fitting parts I bought in 2016. Went with an Aeromotive 20 gallon tank that's a direct fit for a 69-70 mustang.
Bought the modified filler neck from CJP. This is the problem.
The filler neck doesn't even get close to lining up with the tank.
And it won't go all the...
My 66 conv top frame is in bad shape with regards to pivot points and I had just assumed I would order a rebuild kit and restore it. Well, after a bunch of research it looks like no such kit is made and that few if any bushings are made. So have to fabricate custom. I also see that I can...
Anyone know how long the neutral safety switch pin is? I have a couple of pins in my parts box and am not sure if any are correct. The T5 is rebuilt and sealed and I am concerned about inserting the incorrect pin and getting it jammed or locking up the rail.