Any guess on HP level

ironmax

chock full of goodies
Jul 7, 2010
502
27
28
Col. Ohio
Oversized injectors are a waste of money without the air to burn the added fuel, stock injectors can already severly overfuel an lb7's IHI so your not going to gain anything except a lower pulse width. I have the equivalent to 20 overs in mine bc the previuos owner had to replace leaking ones, it dd's well, but when I jump on it, shes smokes out the road, im not a big fan of it. I need more air...
I did 20% on mine, and with stock tuning she runs clean. I did do some mild air upgrades at the same time. Definitely feels faster according to my load cell butt dyno
 

mike diesel

I'm alright.
Sep 6, 2012
4,005
0
36
SLC, Utah
in the last month I did two LB7's with 30 overs from LDS and dialed them back on one and the other guy didn't care since his trans was limped many many times and is going to build it. 1800Us on the limped one (he didn't care and wanted to be able to outrun his son lol) and 1500Us on the second one and they both ran pretty clean except for the initial puff and then really clean after that. the 1500Us one might be a little hot for the stock trans too but he is an older guy and said he would run it much anyway. the other guy said he will build his trans someday and do a turbo is why we went with 30 overs in both. seems more responsive then with stock injectors with similar power output.

I went 2450us with dual pumps on my stock motor and 30% injectors. Ran like a champ lol that put my crew cab to a 12.0.
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,610
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Mid Michigan
Id have to go back and look, but I think with the 30s my pulse was 2300 or so. Single stock pump, too. Figured the goal was to keep rp above 21000 the entire way down the track.
 

catman3126

Ehhh?.... You don't say?
Jul 24, 2012
2,636
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36
NE Oregon
I went 2450us with dual pumps on my stock motor and 30% injectors. Ran like a champ lol that put my crew cab to a 12.0.

Yeah but mike you have a built trans lol. these two guys don't yet. one is limped a bunch and one has not......yet. runs damn good at 1500Us and so far no limp in 5th. but yeah I would goto there with a built trans
 

dirtydieseldan

New member
Apr 2, 2016
6
0
0
So OP, depending on how far you want to take this truck, you probably will need more than those Sally-ass injectors after trans/turbo