260/ProMax cowl pan compatibility?

[pyro]

My mid has the original 2.4 200 adapter, whichever type that is. For years, I have ran my Bridgeport with a 260 cowl and pan, which conveniently blocks off the unused triangular poppet dump passages.

Suppose I wanted to switch back to a poppet valve motor, such as a 2.5 200 or 225 ProMax... From what I recall, the ProMax pan plate has those passages opened up. So, would I just need to open up those passages and bolt it up? Is there not a way to run the cooling system with a second dump hose, without opening up the pan?

[Go Time]

If you want to run a steel bore motor than your best option is to run with a functioning poppet valve and thermostats for temperature control, which means opening the cowl pan base plate. You can do it just dring a hole (larger than the dump hole in the exhaust plate) in the pan were the "triangle" section from the poppet dumps. I don't think there is room to dump the discharge from the poppet above the cowl pan base plate.

[tux974]

If I'm reading your ? correctly, I would get the correct 2.5 2pc plate, they are cheap enough to obtain and I would run the cooling stock as intended.

[transomstand]

My mid has the original 2.4 200 adapter, whichever type that is. For years, I have ran my Bridgeport with a 260 cowl and pan, which conveniently blocks off the unused triangular poppet dump passages.

Suppose I wanted to switch back to a poppet valve motor, such as a 2.5 200 or 225 ProMax... From what I recall, the ProMax pan plate has those passages opened up. So, would I just need to open up those passages and bolt it up? Is there not a way to run the cooling system with a second dump hose, without opening up the pan?

The problem is you still won't have a functioning poppet. Dumping the extra water is ok at higher rpm but you'll be dumping too much at low speed.

[pyro]

I'd rather just run it as designed. What's different between the 2.4 200 plate and the ProMax plate?

It sounds like I would just need to open up the passages in the 260 pan, which would really suck of I ever found a 260 ph I could afford.

[Onetime]

Drill a hole in the pan sized so you can thread it for a pipe plug later if you go to a 260. Just be sure to locate the hole so the plug will clear everything.

[ActivatedSludge]

Just did this swap. Didn't know about the dump my 260 pan doesn't have until transomstand enlightened me. Tomorrow I will pull powerhead off and break out the drill. Gonna miss that 260. If I could kick my own ass I would.

[transomstand]

I'd rather just run it as designed. What's different between the 2.4 200 plate and the ProMax plate?

It sounds like I would just need to open up the passages in the 260 pan, which would really suck of I ever found a 260 ph I could afford.

If you change to a 260 and install a 1 piece exhaust plate, then the hole in the cowl plate won't matter.

[pyro]

THANK YOU, that's what I needed to understand. So the 2.4 200 plate is the two-piece style, and the one-piece style does NOT have the poppet dump passages at all. Perfect. You're a lifesaver.