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Thread: Bag of Parts (beating a dead horse) Reply to Thread
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  Topic Review (Newest First)
09-17-2019 05:02 PM
CTD NUT
Quote:
Originally Posted by GRUNT 11B View Post
You also have to remember that tuning will make a difference. My stock CP3 is handling my 50 HP sticks just fine because my tuning is dialed in. That could be changed to where my stock CP3 won't be able to keep up/hold RP WOT.
I hit this point with my 6.7 swapped 03 because of custom tuning. I have 60 HP sticks on the stock pump. With MM3 tuning getting close to dialed in, I saw the rail pressure drop. Once I saw the rail pressure demand vs actual pump output graphed with UDC Pro, the problem was obvious. The pump couldn't keep up with demand with only 60 HP sticks as the tuning got more dialed in. The 6.7 with twins would take more than what I could feed it. I thought for sure the injectors would have been the limiting factor but in this particular instance, the CP3 ran out of mojo first. I ran it with a another CP3 to verify.
09-17-2019 11:13 AM
GRUNT 11B
Quote:
Originally Posted by massmayhem View Post
Learned the issue was who I chose to go with for injectors and pump a long time ago, shortly after I did that swap but still, I didn’t have any issues myself with the 100’s on a stock pump.
You also have to remember that tuning will make a difference. My stock CP3 is handling my 50 HP sticks just fine because my tuning is dialed in. That could be changed to where my stock CP3 won't be able to keep up/hold RP WOT.
09-17-2019 09:06 AM
massmayhem
Quote:
Originally Posted by 02smokin View Post
I never said it couldn’t be done, people have done it for years. What I said was, you cannot FULLY support 100’s on a stock cp3.... your problem with 120’s and 85 pump was the company you bought them from....
Learned the issue was who I chose to go with for injectors and pump a long time ago, shortly after I did that swap but still, I didn’t have any issues myself with the 100’s on a stock pump.
09-16-2019 11:57 PM
Gator1 I've seen them. It is possible to increase the feed to the pump or it's bores, but, once they're full, they're full, you ain't getting no more unless you increase the stroke. I can only imagine what they're injectors are like...
09-16-2019 11:49 PM
02smokin
Quote:
Originally Posted by Gator1 View Post
Also sorry to bust peoples bubble, but anyone that tries to sell you a IP that claims to give more fuel without increasing bore, or stroke, or rpm, is so full of crap they should be run out of business, because it's not possible unless they come with a special mojo in them to alter physics. A pump can only move the volume of it's bore x it's stroke....period....
There was a company or 2 that was known for this... Iíll let you guess who
09-16-2019 11:43 PM
Gator1 Also sorry to bust peoples bubble, but anyone that tries to sell you a IP that claims to give more fuel without increasing bore, or stroke, or rpm, is so full of crap they should be run out of business, because it's not possible unless they come with a special mojo in them to alter physics. A pump can only move the volume of it's bore x it's stroke....period....
09-16-2019 11:39 PM
02smokin
Quote:
Originally Posted by jacobh21 View Post
Even with an aftermarket lift pump?
Nope not even with 2 lift pumps
09-16-2019 11:39 PM
Gator1 IMHO the bag of parts offer only a very, very slight improvement, and not enough to bridge the gap. You're waaay better off saving your money for a 10mm cp3. my stock cp3 couldn't even keep up with stock injectors and a hot tune. If you're going up in size and a turbo you need more fuel.
09-16-2019 11:37 PM
jacobh21
Quote:
Originally Posted by 02smokin View Post
Stock cp3 will not fully support 100’s, any tuner will tell you that... I’ve never ran bag o parts but had a arson kit on one of my other trucks with 90’s and it almost kept rail where tuner wanted it.
Even with an aftermarket lift pump?
09-16-2019 11:26 PM
02smokin I never said it couldn’t be done, people have done it for years. What I said was, you cannot FULLY support 100’s on a stock cp3.... your problem with 120’s and 85 pump was the company you bought them from....
09-16-2019 07:34 PM
massmayhem Believe it or not but it’s the truth. Not that anyone ever believes anything that anyways says on forums anyways and one person is always more right than another. It’s like everyone that’s says you can’t tune a 48RE through the ecm. There isn’t a single person I’ve provided 48RE tuning for that will say it can’t be done. I have my experiences and they may differ from others but I am aware of my experiences, what I’ve done, what the results were and what I can do. With the setup I had on my old 05 I had zero issue with 100hp sticks on a stock cp3 and it did do worse performance wise after changing to a 85% cp3 and 120 sticks also gave me rail pressure issues after that swap. Certain points of the rp map it would go erratic and truck would become jerky, stumble like crazy. Hated that swap.
09-16-2019 07:13 PM
massmayhem Well I did run F1 100hp injectors on a stock cp3 with a smarty s06 tnt-r on sw 7 and had no issues holding rail pressure. Infact it actually performed better than an 85% over cp3 and 120hp injectors from industrial injection.
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