I have seen the impossible!
- Thread starter Sandracer799
- Start date
I would guess most people, such as myself, don't care about tuning difficulty because we pay for it to be done by those who have forgotten more about it than we will ever know.
Turd lly's have run 10s and gone 197mph on the lakebed...
I've been here since the beginning man..... Although I did take a break for a few years.
Casper was one of few lol. And btw it's a lbz now...
My LLY always had a ghost in it. Pulled fuel, never could figure it out. All Loy's did it at that time(2005-2006) don't know if there was ever a solution found, don't give a damn either. I know mod for mod my lb7 will out run my (and most likely any) LLY period. MOD for MOD. I sold my lilly and will never own another one. I'll replace injectors every 7 years
So after pushing the truck for a year and a long trip I thought I'd give and update. The truck seems to run reasonably well. Idaho Rob did an amazing job tuning it. It still has a few glitches here and there but at least it functions. As far as tuning it is a bit noisy at 1800 -2400 rpm but this again is really minor considering the nightmare this truck is to tune.
With this setup it feels really well powered for towing and the fuel economy is as good as it gets. I'm getting 14+ mpg towing a 8000 lb trailer and 20 mpg city driving. I have not driven a lot of empty highway but from what I have it's been really impressive. I won't post those numbers till I have some accuracy there.
The main issue I am having now after the last trip, is hot starting problems. It always took at least 2 seconds of cranking cold but now after it's hot I have to use starting fluid to get it going. And the other is my truck will throw a u1000 code after a long hill climb. I know this is prolly not directly related to the tune but more so with the swap and possibly an air leak in the injection system.
With this setup it feels really well powered for towing and the fuel economy is as good as it gets. I'm getting 14+ mpg towing a 8000 lb trailer and 20 mpg city driving. I have not driven a lot of empty highway but from what I have it's been really impressive. I won't post those numbers till I have some accuracy there.
The main issue I am having now after the last trip, is hot starting problems. It always took at least 2 seconds of cranking cold but now after it's hot I have to use starting fluid to get it going. And the other is my truck will throw a u1000 code after a long hill climb. I know this is prolly not directly related to the tune but more so with the swap and possibly an air leak in the injection system.
Ive also done this swap and did my own tuning for the customer who brought it to me. it was a bastard to tune but now that I've done it the next one would be easier. so far it has been running good for close to 6 months now and also getting good MPG.
I don't think he is going to answer. Hasn't been on in 2-1/2 years. A good person to talk to about this, is Russ at RPM Motorsports. He has done many of these.
LLY Fuel pressure sensor, lengthen the harness to reach the new sensor location, and you use the harness from the LB7 and mod the under valve cover harness and put the LLY ends on them to connect to the lly injectors. No changes to the fuel pressure. Timing and pulse width is needed to make it run right. and some other things but those need to be done by road testing the truck and seeing how it runs and acts and sounds.
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also the one i did was acali emission truck so i had to delete the egr and mod the bridge and weld the port shut for the egrto be able to use the LB7 bridge due to the LLY bridge not working with the LB7 turbo mouthpiece.
I wanted to stop by with my new findings with the 02 hybrid conversion. This winter I did the original lly conversion, with a lot of help from this thread. The truck ran "ok" had lots of rattle and was a bear to drive, but made 511hp on dyno and ran out ok... Well after my wife wrecked her 2.5 truck. I decided I'd start playing with this 02 dually. So Monday I got a wild hair and pulled cab and swapped in a set of lbz heads I had on shelf, Tuesday put in some 60% over LMM 6 holes, and a dual fueler kit. Initial start up I noticed an immediate difference in engine noise and how it ran. It sounded and idled like stock lb7!.... Took it to dan clarkes place and we dyno tuned it. He was able to actually able to trash my tune that I worked on for a solid week to make the old setup to work. Copied over stock lly tables and started dyno tuning. Each tune would gain us 30 more hp it seemed. Ended up with 630/1100 the stock ihi was out of breath. Sorry for the rambling. Got an 8hr drive ahead of me. But my point is. Lb7 ficm/ECM will drive LMM injectors like there's nothing funky going on! I officially have parts from 01-15 engine models all stuffed into one engine. Lol
