Engine/Transmission (1994 - 1998) 1994 12 valve engine problem

[123beavers]

I have a 1994 Dodge Ram 2500 with a 12 valve and 5 speed transmission. I have recently added 80hp Industrial Injection injectors, delivery valves, ARP head studs, 40lb valve springs, 4000 rpm governor springs, and the timming is advanced to 18 degrees. When it gets in the higher rpm's (3000 rpm and above ) it starts popping. Even when it is popping it still has 18 lbs of fuel pressure. What could be wrong? The fuel plate is also removed from the injection pump.

 

[The patriot]

I've heard of this problem, but I cant remember what the fix was.

Do a search, I know you'll find the answer.

 

[123beavers]

How should i search it?

 

[Nyoest]

Does it do it while driving?

 

[123beavers]

It does it anytime that it is above 3000 rpm. While pulling and driving.

 

[Nyoest]

40lb valve springs,

Is that a typo? 18 psi sounds kind of low anyhow. I can only get mine down to about 24 psi wot 35 psi and little to no plate.

 

[The patriot]

search how to.....

Go to the 12 valve specific forum.

Just below your name there's a tab that says "Search this forum"

Click that and enter "popping". I seem to remember seeing that verbiage used here on the forums. If not, one of the more knowledgeable folks here will chime in sooner or later.

Joe Donnely, GAmes, Joe George,Vaughn MacKenzie,Mwilson, a lot of names I'm forgetting here. . You could always PM them or email them if you cant wait.

 

[fest3er]

Search for popping governor springs. I have a very vague recollection that it has something to do with governor spring settings.

 

[123beavers]

How do i email one of the experts such as joe donnely?

 

[ata]

You said you put in 40# valve springs. I think your floating the valves you should have put in 60# valve springs for anything over 3500 rpm's.

 

[123beavers]

is there a way to check and see if it is floating the valves?

 

[ata]

Other then what you said about your engine NO. But if you are floating the valves you will bend them or pop the keepers out and drop it in to the cylinder. Either way it's not going to be good.

 

[The patriot]

How do i email one of the experts such as joe donnely?

Find a post by him and click on his name. Click "send a PM".

 

[Joseph Donnelly]

I don't know what valve springs you are using. Stock springs are a single straight outer diameter and rated for 35 psi back pressure from an exhaust brake. The “60 psi” springs are barrel shaped meaning the end coils are smaller diameter, like the 35 psi springs, but the middle coils are bigger outside diameter, and are rated for 60 psi back pressure. They give a much higher seat pressure; they are the easiest available upgrade springs formore rpm. The reason everyone uses them now is that I found the horsepower curve got ragged at about 3200 rpm with the stock 35 psi springs and smoothed out with the 60 spi springs. For extended high rpm use, consider flat spring steel dampers in the coils, like many V8 gas engines have used for 50 years. Don't remove the fuel plate; you can use a flat vertical surface plate like the zero I designed about 10 years ago. You want one in there as a rack stop to protect pump internal parts. Of course, if you are using the stock rack plug at the front of the pump, it will restrict maximum rack travel as well. Many pump shops set your torque plate for a given maximum rack travel and forget that the rack plug and the AFC link also can stop the rack.