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Old 07-16-2017, 02:51 PM   #21
killawhale
 
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I think I'll save up some money and call Seth and send him the pump.
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Old 09-26-2017, 06:37 AM   #22
turbo2387
 
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After much consideration and a bunch of talking to people that are much smarter than me, ive decided to cam my 160 pump. Im gonna leave everything alone other than the cam,springs and pull the timing from 22 to i think 18. Towing sucks at 22*. The goal is full fuel in the 3800-4000rpm range. Decided to go with a hamilton instead of a 903 or a regrind. It was just a few $$$ more. Hopefully will get some time in the next couple weeks to get it all taken apart and put back together.
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Old 09-26-2017, 06:44 AM   #23
turbo2387
 
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I have done a bunch of talking with guys who run 13mm pumps and about everyone agrees its night and day with the power. I very much hope im not throwing money at this thing for nothing but I've convinced myself I don't need 700cc's of fuel, I need 450-500cc'c that is more precisely controlled. and with that the truck should..... be able to support a noticeable amount more power than it currently does on maybe a size bigger injector all while emitting less smoke on less timing. is my $1600 hope anyways.
 
Old 10-01-2017, 10:10 AM   #24
turbo2387
 
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Cherry is popped. Sending to Seth on Monday.
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Old 10-01-2017, 11:19 PM   #25
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I have a 175 with a cam, it makes good power and flows 510cc's at 5000rpm and is very streetable.
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Old 10-02-2017, 05:23 AM   #26
turbo2387
 
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Do you ever pull a trailer with it?
 
Old 10-18-2017, 04:34 PM   #27
56cummins

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Quote:
Originally Posted by turbo2387 View Post
After much consideration and a bunch of talking to people that are much smarter than me, ive decided to cam my 160 pump. Im gonna leave everything alone other than the cam,springs and pull the timing from 22 to i think 18. Towing sucks at 22*. The goal is full fuel in the 3800-4000rpm range. Decided to go with a hamilton instead of a 903 or a regrind. It was just a few $$$ more. Hopefully will get some time in the next couple weeks to get it all taken apart and put back together.
How much was the 903 cam? Which Cam did you get, 2.75? Keep us posted on how it works out.
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Old 10-18-2017, 04:48 PM   #28
turbo2387
 
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The pump is on Seth's bench somewhere. Trying to be somewhat patient. Its hard. I went with a 2.75 cam and their HD springs. Zach/hamilton was pretty adement about using their springs. A ground 903 cam to sigma specs through columbus was around $575. Hamilton was right at $900 with springs. Cam alone was just a few bucks more than a regrind. A stock quick rate was very tempting as i could have used my springs and save a few hundred $$$.
 
Old 10-18-2017, 05:10 PM   #29
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Quote:
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I need 450-500cc'c that is more precisely controlled.
Do you have any idea how much power 450-550cc's will support??

Chris
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Old 10-18-2017, 05:16 PM   #30
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Personally nope. My hope is that i can get about 1.8hp per cc. With a goal of 700hp worth of fuel thats about 390cc worth of fuel. Idk if i can make that work (possible pipe dream) Would be extremely super cool if i could make that kinda power on that few of cc's of fuel. And is very much my goal.
 
Old 10-18-2017, 05:18 PM   #31
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It always seems that the less perfect tinkers, like myself need a little more fuel than the bonified bad a$$es to make the hp they want.
 
Old 10-18-2017, 05:31 PM   #32
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Looking forward for the update, any other changes other than the pump work? Def curious on how it turns out.
 
Old 10-18-2017, 05:40 PM   #33
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Im changing nothing initially other than the pump. Wastegates, fuel pressure, everything is staying the same so i can compare loads of past data against the new. I do not know what timing will be set at yet. Was 22* and it was terrible towing. So lower than that. Will still run 5x14 injectors which i can see as being a potential issue up top but idk yet. Im hoping the extra RPM's will allow me to drive the primary much harder. Doesnt matter how i tune about 27psi from the 475 is all i can get. 70psi total. Id really like to get the primary up in the 30's and gate around the secondary a bit more.
 
Old 10-18-2017, 05:54 PM   #34
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That will be awesome to know, perfect test. Thanks man
 
Old 10-19-2017, 06:51 PM   #35
turbo2387
 
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Hope to have it back in Indiana beginning of next week.
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Old 10-19-2017, 06:55 PM   #36
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Noticed 440cc's, was he going after quicker injection rate and not max fuel?
 
Old 10-19-2017, 07:10 PM   #37
turbo2387
 
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That is my goal, very quick controlled injection. If i wanted heller fuel ide have went 13mm. I do wonder what a racked stocker put out though? Probably just about the same. Said this should fuel to 4-4100rpms. I was defueing before at 3300 or so.

440cc's at 1.5 to 1.8hp per cc is 660-800hp worth of fuel. That should be plenty for what im doing.

Last edited by turbo2387; 10-19-2017 at 07:12 PM.
 
Old 10-19-2017, 07:27 PM   #38
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I'm sure it'll run good, know a couple guys that run his pumps and all run strong.
 
Old 10-20-2017, 09:33 AM   #39
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Quote:
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Noticed 440cc's, was he going after quicker injection rate and not max fuel?
That's also with the AFC pulled 2/3's of the way back. But for a street truck, I think that's probably going to be a big improvement over where he was at before.

I'm pretty excited to hear feedback.

OP, do you have 1/4 mile times or anything you can get apples to apples results on?
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Old 10-20-2017, 09:52 AM   #40
turbo2387
 
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apple to apples will be identical runs on the same road showing

speed
boost on both turbos
rpms
egts
pressure ratios on both turbos


I have an entire sheet of 1/2 turn adjustments on the spring gate to current, on all of these same numbers as well. so I can go back to X adjustment and compare vrs the new pump.
 
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