Timing versus HP comparison.

Ron I was thinking last night after I talked to you..... I would like to start a thread with only p pump 24v dyno sheets. I know my truck dose similar things at 3k. I know it's not the 215 pump. I had a 160 and it was worse. I have had low timing all the way up to 40* with no difference over 3k. I wish I could get some more power over 3k so I could get it to charge on the big end at the track.
 
no difference over 3K???

like not building power or the curve isnt as steep as in the lower rpm range?
 
CL2000 said:
Ron I was thinking last night after I talked to you..... I would like to start a thread with only p pump 24v dyno sheets. I know my truck dose similar things at 3k. I know it's not the 215 pump. I had a 160 and it was worse. I have had low timing all the way up to 40* with no difference over 3k. I wish I could get some more power over 3k so I could get it to charge on the big end at the track.
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That's a great idea. Sure would take a lot of the guess work out tuning ppumped 24v's.
 
CL2000 said:
Ron I was thinking last night after I talked to you..... I would like to start a thread with only p pump 24v dyno sheets. I know my truck dose similar things at 3k. I know it's not the 215 pump. I had a 160 and it was worse. I have had low timing all the way up to 40* with no difference over 3k. I wish I could get some more power over 3k so I could get it to charge on the big end at the track.
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I've been told it's the cam, the pump, the head, the turbo's, the injectors, just depends on who you ask. If the new motor still does this it will be very upsetting. Between worrying about getting more rpm and being told the 6.7 won't hold a headgasket with twins I'm going to get an ulcer.:Throwup:
 
RonA said:
I've been told it's the cam, the pump, the head, the turbo's, the injectors, just depends on who you ask. If the new motor still does this it will be very upsetting. Between worrying about getting more rpm and being told the 6.7 won't hold a headgasket with twins I'm going to get an ulcer.:Throwup:
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Maybe the piston return springs we run are only good for 3k?
 
CL2000 said:
Maybe the piston return springs we run are only good for 3k?
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I'll order 2 sets of 4k return springs and let you know when they get here. Bring your truck up and we'll do both at the same time.
 
Smokem said:
Try this; two runs initial +1 and 26°, two runs initial +3 and 22°, then you will know what caused what.
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Ron, do you plan to try this or atleast get back on and see what governor tension changes are responsible for regarding the power you gained?
 
NickTF said:
Ron, do you plan to try this or atleast get back on and see what governor tension changes are responsible for regarding the power you gained?
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I'm out of fuel. Plain and simple. Video's show it, the dyno shows it, other people with similar pumps show it. I have another pump in the works.

Watch around the 7-9 second mark just before the shift to OD. Fuel is gone, smoke is gone. You can feel it drop off before the shift. After the shift when the revs drop, it comes back.

http://www.youtube.com/watch?v=qfBa5j52AfI

RonA
 
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RonA said:
I'm out of fuel. Plain and simple. Video's show it, the dyno shows it, other people with similar pumps show it. I have another pump in the works.

Watch around the 7-9 second mark just before the shift to OD. Fuel is gone, smoke is gone. You can feel it drop off before the shift. After the shift when the revs drop, it comes back.

http://www.youtube.com/watch?v=qfBa5j52AfI

RonA
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So is CDS not as great as everyone makes them out to be?


Who you going with on the next pump?
 
bsmith said:
So is CDS not as great as everyone makes them out to be?


Who you going with on the next pump?
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My CDS pump runs excellent. But it is not a full blown, pull out the stops pump.
 
ya its got to be hard when a 900hp daily driver isn't enough.. esspecially in a light little 1st gen..
 
RonA said:
I'm out of fuel. Plain and simple. Video's show it, the dyno shows it, other people with similar pumps show it. I have another pump in the works.

Watch around the 7-9 second mark just before the shift to OD. Fuel is gone, smoke is gone. You can feel it drop off before the shift. After the shift when the revs drop, it comes back.

http://www.youtube.com/watch?v=qfBa5j52AfI

RonA
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Yeah, from the videos it certainly looks that way. I'm still interested in which change was responsible for the large power increase prior to running out of fuel after/around 3k. Good luck, that truck is a sleeper!
 
wow, this is some interesting stuff! im wanting a 13mm pump, oh wait, cant just put a 13mm pump on a rolling frame :bang
 
I thought i might have found an issue today while woking on the truck. My shut off solenoid hasn't been working properly and I noticed that the fuel shut off linkage had walked almost off the shaft. The key was just barely catching on the corner. I was hoping that might be why I wasn't getting full fuel, but after getting it back together and set, it looks like the shaft was still rotating all the way. I have a new pump being made hoping for a bit more fuel and more rpm. Once I get the new pump installed, I will send this pump to the same shop for comparison. That will give me an idea of where it is versus the new one. This new pump only has 17k original miles on it and i hated to turn it into a high performance pump, but at least all the internals should be in perfect shape. I'll keep my fingers crossed and see if the new one will at least be able to get me into an overfueled situation so I can continue to move forward. Unfortunately I won't be able to run it all the time. The trade off will be accellerated wear potential from a more aggressive cam profile. Looks like I'll need to keep both pumps.
 
Pumps going to be on the stand next week. Sending my modded afc, plate, and a couple sets of delivery valves to check flow with. Once he's done with that, I'll send the pump I already have in to see if there is an issue with it and compare flow numbers with one of the DV sets. Should answer all my fuel questions and give me the last bit of pump and dv data I need for my notes.
 
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