rkc9700

Member
will the turbo and manifold from a Ford 9700 switch over to a FORD TW-5? The 5 needs a bit more hp and the 9700 is pretty much used up with lots of hours. can this been done without much reworking or trouble?
 

Since you are asking again I'll take a stab at it. Externally, since the motor is the same block, and I am pretty sure the same head, plumbing it in should not be too big a deal. Inside is where there are differences. I am not positive about these things, but I believe that the pistons are different in order to produce less compression with the turbo. I believe that the rods are different in that the turbo rods have a hole pointing at the bottom of the piston in order to oil cool it. I expect that you want the additional power for use hour after hour, which could lead to failures. Try a shout out to Bern and RodNS.
 
Showcrop pretty much nailed it. Yes, the turbo will bolt on. Turn up the fuel, and you'll have TW20-ish power levels, for a while. However, the engine internals are not the same, and you could have troubles down the road, depending on how hard you push it, and for how long.
 
yes, it should bolt up....
I'm probably a little more optimistic about it's survivability than the others.... but I still think you need to keep it modest. I have a 233 5000 with an M&W and WAY too much fuel going to it and it seems to have survived pretty good.... but I don't flog it too hard either.
The differences you generally find are lower compression ration on the turbo engines, oil lubed rods and wrist pins, keystone rings, 3 angle valve job instead of 2... hardened crank, etc. Most likely a larger capacity fan as well.... and larger injector nozzles. But if you keep things down to half a turn on the screw you probably won't kill it.
The thing to remember is that most engines have a continous rating.... that they can do hour after hour.... and then a couple of intermittent ratings that they can do for modest periods and very short bursts. If you respect that then you can obviously coax more power out of it without much expense.... but if you think it's going to push 140 hp all day long it's not going to last long.

Rod
 
(quoted from post at 11:12:53 09/09/16) yes, it should bolt up....
I'm probably a little more optimistic about it's survivability than the others.... but I still think you need to keep it modest. I have a 233 5000 with an M&W and WAY too much fuel going to it and it seems to have survived pretty good.... but I don't flog it too hard either.
The differences you generally find are lower compression ration on the turbo engines, oil lubed rods and wrist pins, keystone rings, 3 angle valve job instead of 2... hardened crank, etc. Most likely a larger capacity fan as well.... and larger injector nozzles. But if you keep things down to half a turn on the screw you probably won't kill it.
The thing to remember is that most engines have a continous rating.... that they can do hour after hour.... and then a couple of intermittent ratings that they can do for modest periods and very short bursts. If you respect that then you can obviously coax more power out of it without much expense.... but if you think it's going to push 140 hp all day long it's not going to last long.

Rod
Half a turn??? That's no fun, I'd be going 5, LOL
 

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