63chevyll
1/2 ton status
Those brackets are nice. Should be a nice item for conversions. However I would try and use a TBI alternator
CK5
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76 CCDRW...Cummins noises
- Thread starter 76zimmer
- Start date
rompinstompinmudmonkey
1/2 ton status
Mh truck was tbi before the repower. What's the difference in the alternators between carb and tbi?
TBI is not a good breaking point. 1987-1989 use a different alternator than 1989-1991.
Martin
Martin
63chevyll
1/2 ton status
I was stating the TBI alternator (88-95) trucks. Because they have higher amp output than the previous ones and already had a serpent belt pully on it.
rompinstompinmudmonkey
1/2 ton status
Oh I see. Regardless the pulley needs to be changed though. The cummins has a wider belt with 2 more ribs.
Thats the oddity I was thinking then.
So The PCM controls the voltage instead of a regulator?
No AC on mine
DEMON44
Low-Tech Redneck
I was wondering about the supply line to the lift pump. From what I read, the stock lift pump is a real good piece but may be a limiting factor for feeding the injection pump sufficiently even at stock settings. The factory Dodge 3/8" lines with reductions for the fittings may hamper the performance of the fuel system overall, especially above 2000rpm...thoughts???
fuelsystemtechharticle
fuelsystemtechharticle
DEMON44
Low-Tech Redneck
False. The stock diaphragm lift pump will feed 450-500 hp before it becomes a problem.
DEMON44
Low-Tech Redneck
I'm not going to refute 90% of that article. Because it is valid hydraulic theory. I deal in hydraulics every single day at work.
It's also irrelevant because the stock late 2nd gen 12v lift pump is proven to be able to easily supply 450rwhp.
It's also irrelevant because the stock late 2nd gen 12v lift pump is proven to be able to easily supply 450rwhp.
I've read the article also. I think Zim's question is not if the pump can handle the motor but the fuel line size is big enough for the lift pump. Sounds like the lift pump would like a 5/8 (-10) to truly efficient.
FYI... Stock Duramax lines are 1/2 inch!
Just found that out BTW... needed to replace one of Colby's and everyone in Lacombe was out except for the tractor dealer... They gave me a chunk for free!
I guess when you buy thousands of dollars in equipment, what's a piece of fuel line.
Just found that out BTW... needed to replace one of Colby's and everyone in Lacombe was out except for the tractor dealer... They gave me a chunk for free!
I guess when you buy thousands of dollars in equipment, what's a piece of fuel line.
DEMON44
Low-Tech Redneck
76 CrewCab Dually, 12/23, fuel line sizing for lift pump???
Exactly. That's redicilous.
15L 600hp highway trucks use that.
3/8" is TONs for a low horse pickup like this 12v. Actually 3/8" is the upgrade for the 24v trucks.
Dave. Don't over complicate the job.
Exactly. That's redicilous.
15L 600hp highway trucks use that.
3/8" is TONs for a low horse pickup like this 12v. Actually 3/8" is the upgrade for the 24v trucks.
Dave. Don't over complicate the job.
Agreed
OK, thanks for the input guys...experience counts here, and that's where the brotherhood comes in!!!! The article seemed to be making sense of things as I was reading it, and if I needed to improve now would be a good time!
The lift pump looks to be in pretty good condition as it sits, so I'll clean it up a bit and put it back on the engine as is.
The lift pump looks to be in pretty good condition as it sits, so I'll clean it up a bit and put it back on the engine as is.
DEMON44
Low-Tech Redneck
Break up the red with black. Looks very sharp.
