pre cup destruction

[lowenbrau]

I wouldn't be surprised of you could adapt a 4BT pump. All diesel pumps seem to be based on Bosch designs. I'd try the stock 3b pump first though. They can produce plenty of fuel and you can upgrade to larger plungers if you need more. I wonder if you could use a wastegate actuator as a boost controller. If you have a Cummins source see if you can make a 12V Cummins intake heater work on a 3B manifold.

 

[Dougal]

I wouldn't be surprised of you could adapt a 4BT pump. All diesel pumps seem to be based on Bosch designs. I'd try the stock 3b pump first though. They can produce plenty of fuel and you can upgrade to larger plungers if you need more. I wonder if you could use a wastegate actuator as a boost controller. If you have a Cummins source see if you can make a 12V Cummins intake heater work on a 3B manifold.

The interesting part about the cummins pumps is they are handed the same way as the Toyota B series. Where the Isuzu 4B engines run their pumps on the other side of the engine.

Some 4BT's are VE pump, but I don't know the plunger size or max fuel output. Some 4BT's are A pump with 9.5mm plungers, the Isuzu A pumps with 9.5mm plungers are good for around 200hp.

 

[Tapage]

I expect it does. Indirect injected engines run all their heat past that small, poorly cooled precup opening. Direct injected engines with piston skirt cooling seem to manage the heat better..

yes and no .. in my IDI when you are seen flying EGT's you was seen from some time before your water temp flying around .. not the case in DI ( 1HD-T ) where your EGT's fly and your water temp keeps steady.

 

[lowenbrau]

yes and no .. in my IDI when you are seen flying EGT's you was seen from some time before your water temp flying around .. not the case in DI ( 1HD-T ) where your EGT's fly and your water temp keeps steady.

I mean the heat in the combustion chamber but the correlation between EGTs and water temps that you have seen is interesting.

 

[lowenbrau]

The interesting part about the cummins pumps is they are handed the same way as the Toyota B series. Where the Isuzu 4B engines run their pumps on the other side of the engine.

Exactly. Otherwise the Isuzu pump would be a shoe in. I think there is a John Deere version with 10mm plungers.

 

[Hulsty]

The interesting part about the cummins pumps is they are handed the same way as the Toyota B series. Where the Isuzu 4B engines run their pumps on the other side of the engine.

Some 4BT's are VE pump, but I don't know the plunger size or max fuel output. Some 4BT's are A pump with 9.5mm plungers, the Isuzu A pumps with 9.5mm plungers are good for around 200hp.

Totally off topic, but some guys have recently bolted 6BT pumps to their Nissan TD42's which run a similar rotary pump to 1HDT's.

 

[Tapage]

I mean the heat in the combustion chamber but the correlation between EGTs and water temps that you have seen is interesting.

it is and it's directly related with the topic of this thread .. IDI makes all the heat in the pre cups and that's why if you push 'em anough hrd you will have water temp issues ..

 

[gerg]

I think it is worth mentioning that your exhaust runner is completely surrounded by coolant. Probably has something to do with it as well.