ewatts2003

Hey all. Can anyone tell me the major differences between the 3 P-Pumps besides the obvioius horsepower? Thanks in advance.

Eric

A-Poc

From what I've read, the 215 has bigger internals in comparison to the other 2 and can make more overall power. The same goes to the 180 in comparison to the 160. Visiable they look the same but the 215 definately delivers more fuel.

Now, what I'd like to hear more about are the 230 pumps found on older school buses. This is what I've heard but I could stand corrected.

Mike

JD730

I don't know if there is a difference in the plungers, but I know there are delivery valve differences between some of the pumps, most notably the 160/175 pumps when compared to the 180/215 pumps.

Also, look at the time chart at this link. http://dodgeram.org/tech/dsl/FAQ/timing.htm
From looking at the chart, you can conclude that the cams in the pumps are different, probably different profile and lift rates.

robert chilton

215 pumps have a different cam than the others. I have heard that the 180 pumps have the same cam but others say they are different. The 180 pump has the same timing specs as the smaller pumps so I dought it has the good cam. The plungers and barrels are also different for the 215 pump. They have a notch in them that effects timing slightly but dont ask me how as it has to do with fluid dynamics thats well past me. 215 and 180 pumps have 181 delivery valves where the 160 and 175 models have the 131s. These are the major differences. There are others such as AFC spring preasures.

RedRotors

180Hp and 215Hp pumps share the exactly same cam..


A-POC : do you have the Bosch number of that 230 pump? Im also curious to look at it in the Bosch manual..

Cheers,

Marc/

ratsun

Wow! I'm pretty sure Piers told me they are different?

RedRotors

According to Bosch manuals, they have the same P/N, so they are identical..

Marc/

robert chilton

If the cams are the same why do they have different lift specs for timing? Are they retarded in the 180 pumps?

gmctd

The timing alters the power band - the automatics have a torque-multiplier built into the torque converter and can use retarded timing compared to the manual trans vehicles, which will be using more rpm to get the load moving, and need a little more advanced timing.

It's all about where you want your torque - and, probably some about protecting the automatic trans.

robert chilton

I totally understand the principal behind the timing. What I am saying is that if the cams are the same, for arguement sakes, why does the 215 have more lift than the 180 pumps at TDC? Either the cam in the 180 pump is retarded or they are different cams. Personally I have no idea which cam is in there and I have seen evidence of being the same and different. I do know for sure what the timing chart says. I think the 175 and 180 are similiar with the big difference being the DVs. This is only my theory though.

Rhino

Or the top of the plungers is different causing a different lift spec

ratsun

Well than they must be the same as far as the cams P/N goes but I can tell you from experience if you pull a 180hp pump off and land a 215hp pump on with the same cam plate a GSK kit the difference is the same as putting a wire tap box on a 24v Its Freekin huge! So what other differences there are who knows, but there's a night and day difference in power and I dont just meen the 35hp thats claimed

robert chilton

Good thought Rhino. I never thought of that one.

Rhino

The most notable difference in the 215 pump, and the reason it is so much stronger than the others, is the difference in the plunger and barrel assemblies.

gmctd

Plunger height directly indicates timed position of the pump cam to the crankshaft -

The plunger is .XXX" height at 14deg BTDC, but it is till rising as the cam rotates.

Rotating the pump driveshaft in the driven gear causes the increase in plunger height dimension, indicating the desired degrees of advance.