383lt1impala

iTrader: (33)

Hello all I finally got my 383 ls1 running in my jeep m715. Runs good. It has a victor jr intake. Quick fuel 750dp e85 carb calibrated by them. Have the Ngk 7 plugs gapped at .030 I have timing set at 0-15 degrees from 0-1000Rpm starts up and idles good. And from 1000-1500rpm 15-35degrees and 35 degrees from there to redline. How's that for timing? I'm having a converter issue doesn't let it rev up in drive but was told it can be a tune issue. Monday I will buy a afr gauge. To see how my afr is looking.

ZONES89RS

iTrader: (25)

I would probably open the plug gap to .035 on a 6 heat range. The timing might want another degree. That fuel is like 106 octane. You are running timing and a gap that I run on nitrous(timing before I pull 5-6 degrees).

Get a little more aggressive and see what it likes. The BTU burn on that fuel is much slower than gasoline from the pump.

383lt1impala

iTrader: (33)

I can change timing while it's running right? And when I change something I have to save PC to msd and user data correct? I'm 23 don't know much about timing I'm just going with what I read of research.

dogsballs

i run a custom 1000 holley e85 carb by eric at horsepower innovations on a 6.0 with square port heads. i don't have any issues with spark as i run a big hvcII coil, which will throw a spark with a burnt off plug strap. i make the same power from locked out 20 to 30+ timing, but run on lower side.

that 750 sounds on the small side, but should still work.

383lt1impala

iTrader: (33)

I switched it to 37* max timing runs better. A lot better .84-.90 afr on wot .73 on idle don't like it too rich on idle. Tried messing with it got worse. But it's good now. The converter still don't let it rev up. I ordered a 4000 stall. Should have it in Tuesday. Button stuff on it and go to glamis next weekend.

dogsballs

personally think its nothing to do with convertor. i'd be checking fuel and ignition first.

just little things like float level, needles not sticking, jet extensions etc.

dogsballs

also check your spark table goes high enough up rev range, good leads etc

383lt1impala

iTrader: (33)

My float level is half in the sight glass my redline is 7000rpm goes up in nuetral and park like nothing. My afr is good on wot. Too rich on idle thought. I don't know how to check the jet extensions and needles I'm 23 this is the first motor I have really messed with.

dogsballs

sounds good so far. take the rear bowl off, some people (me included) use extensions that project the jets to the back of the bowl so they don't get uncovered during acceleration. the seat and needle allow fuel into the bowl (the tab on the float will open/close it). basically if the float level drops during abrun then you need to upgtade. i run 108 sec jets and they suck heaps of fuel, had to go to 150thou needle/seat.

383lt1impala

iTrader: (33)

I'll check that out. And the way quick fuel spec'd the carb to me is
Primary jets 80. pri nozzle 35
Secondary. 90 sec nozzle 35
Iab 65 Needle and seat 130ss
Hi speed bleed. 28 Power valve 4.5

dogsballs

what cam specs? as to me thats not enough e85 for 383. i run a 236/246, 613/613, 110 lsa on a 6.0 with 11.9:1 comp.

383lt1impala

iTrader: (33)

239/242 .640 .638 112lsa 12.5 compression.



Took the rear bowl off this morning. Everything looked good. But when I put it back. It seamed that when I give it wot. The front squirters. Squirt as I accelerate. And the rears squirt as I let off the throttle not as I accelerate.

JRracing

iTrader: (35)

Picks of said jeep? lol.

383lt1impala

iTrader: (33)

https://ls1tech.com/forums/conversio...jeep-m715.html pics in there

JRracing

iTrader: (35)

Note, check the rear bowl on the pass side and look at the bottom, there is a little lever that is the acelorator pump. You could easily leave it down when putting the bowl back on and this would cause it to not work like you said.
Check that.

dogsballs

yeah easy to miss the lever.

did it have jet extensions in the rear?

383lt1impala

iTrader: (33)

Yes there were jet extensions. And I left the lever like I found it I'll double check tomorrow thanks guys I appreciate these tips.

383lt1impala

iTrader: (33)

I checked it it's exactly like the front one. Also I finished the converter install and man it's a biggg difference. Burns out from a standstill with 37s pretty good. But I know I don't have the motors full potential. It still doesn't want to go to 7000 too much yet. Runs way better though.