3406b turn up

7E5888 is what I call a C model fuel pump..
Really makes no difference at this point, but I can tell you this, thats not the one you want for turning the screws out..

Other B models have a different casting number unless its a reman.. And there is some difference even though they look and work the same way.. That's for another time though..

Now you are better off it is a C with the wider bearings, reason I was saying that about engine arrangement as the computers have it listed, as they did interchange for that one year..

Did you mean a 13 or 18 speed??
If your 15 is an overdrive then you probably wouldn't want an older 13 with .87 overdrive..
And a good used 13 or 18 speed with .73 = $$$$$ unless you get real lucky..

If your 15 is a good one you might find someone to trade with you, the 8ll replaced the 15 a while ago, and though they still aren't that hard to find, alot of people would rather have the 15.. They have been hard to beat in my experience, but I like a 13 for a road truck as well..

WTF

I am always impressed, even after seeing it happen every time somebody mentions the words "turn it up", the genuine concern that will surely follow for the health of another fellows engine..

Even if it is totally rediculous, it's just good to know that somebody cares..

 

If your gonna go with a 13/18spd don't get anything smaller than a RTLO16913A<<<make sure it has the letter A behind the numbers. If it has a B instead you will end up with a top gear of .84/.86, can't remember which one. The RTLO16913A has a top gear of .73.

 

Just by looking at the outside of the motor you can't tell a difference between a B or C. If you bumped the timing up alittle and it worked, leave it alone if your happy, or do like I end up doing..... Mess with it more and then go back to where I had it...LOL.

You most likely have a B pump or atleast one that you can turn up. If you turn the screws out, make sure you turn both the same amount of turns. Just don't over do it! Turn them out and run the truck a week to see how it is then if you want more go a cpl more turns.

Did we go over the AFRC valve?

 

Good! I hope you didn't lose that little spring.

Wanted to add this..... It's gonna smoke!!!

 

Could you be confused or im I ? This is a mechanical c/model why do you say its not the correct pump to be backing out the fuel screws?

 

Wider rod bearings!

 

All I meant was they don't respond as well to a round on the screws, or don't seem to have as much rack travel as the older pumps, thats all..

I say turn it wide open, then let your foot be the governor..