95 yj 2.5 ignition timing.

jlabean · 10-19-2008, 07:04 AM

ok here we go. i have tried to change my timing for the NOS. no luck the computer fights me tooth and nail. i modded the distributor so i can turn. nottin..... stays on 12.

i modded the cranck sensor.... nottin stays on 12.

WTF? i know its computer controlled but there has to be a way. if i can pull it up to about 9 BTC it would really come alive.
any ideas?

Showell · 10-20-2008, 08:41 AM

Jlabean,
It is my understanding that the computer controls the timing, air/fuel mix, etc. I don't think you can change it.
Just so I understand you correctly, you are adding NOS to the 2.5? Why not put a SB Chevy in it and be done with it? Or does NOS mean something else?

Scott

**MLJeeper** · 10-20-2008, 10:40 AM

LOL, sounds like hes talking about N2O alright. Just out of curiosity, how much are planning on shooting? Cant imagine it would be much. Might be able to get by with a colder heat range on the plugs instead.

TnTRacing28 · 10-20-2008, 10:45 AM

How big of a shot are you putting on it? I have thought about doing it but havent brought myself to install a kit. I would be very intersted in how it works out...I do not know anyway around the computer timing for the ignition...sorry

jlabean · 10-21-2008, 06:43 AM

Nitrous Oxide Systems (NOS)
ok. why would i put NOS on as oppose to a sb? used NOS kit $100.....
replacing the engine, trans, transcase, both drive shafts, d30 and d35, have new motor mounts welded in, $1,000's.
i run a 65 hp wet shot. just as an FYI for the ppl scared of NOS i have ran 7 20lb bottles through my 2.5l with 140,000 miles on it and it still runs like a top.
its been on my jeep almost 2 years.
with stock tires it blow the tires off in 2 gears and some of 3rd.

with the 32" tires it will slip the clutch in 4 gears. not so good. but it is the OEM clutch so i guess thats not so bad.
now with the other engine mods i have done. it will hang with the 4.0L main roads and in the trail. with out the bottle.
with all the work i have in to my motor i still only spent about $400.

**MLJeeper** · 10-21-2008, 10:11 AM

Quote:

Originally Posted by jlabean

Nitrous Oxide Systems (NOS)
ok. why would i put NOS on as oppose to a sb? used NOS kit $100.....
replacing the engine, trans, transcase, both drive shafts, d30 and d35, have new motor mounts welded in, $1,000's.
i run a 65 hp wet shot. just as an FYI for the ppl scared of NOS i have ran 7 20lb bottles through my 2.5l with 140,000 miles on it and it still runs like a top.
its been on my jeep almost 2 years.
with stock tires it blow the tires off in 2 gears and some of 3rd.

with the 32" tires it will slip the clutch in 4 gears. not so good. but it is the OEM clutch so i guess thats not so bad.
now with the other engine mods i have done. it will hang with the 4.0L main roads and in the trail. with out the bottle.
with all the work i have in to my motor i still only spent about $400.

LOL ive run nitrous on vehicles since the 80s. I actually like the stuff. But out of curiosity, if you've run it on your jeep for 2 years, how are you just now addressing the timing issue?

jlabean · 10-21-2008, 06:39 PM

i just add a high lift cam, ported intake, and header. so i know i can get more out of the little 4 popper if i pull my timing up. the computer kept it from spark knocking too bad before when i would spray it. but now not so much. its too busy trying to keep up with all the extra air flow.