Maximizing my combo

[MoparNJeep]

This stroker is in my 1999 cherokee XJ. 4.0/AW4/D30/8.25/3:55 gears 35" km2s 5.5" lift

My Combo
4.5L stroker
Scat 3.895 crank
707 Casting rods
H802CP pistons
Comp 68-200-4 cam
98 & older timing set
0630 head (57cc chambers)
Ebay header
Bored 62mm throttle body
Stock 23.2 injectors
Static Compression 9.4.3
Dynamic compression 8.25
Quench .082

Motor has about 150 miles and runs strong. I can't seem to find out how to set fuel timing. I searched for the toothpick method but there is no hole on the side of my distributor. Since my cam is aftermarket I ground off the tab on the passenger side not the block side and rotated distributor maybe 3/16 counter clockwise and it ran much stronger but still seems off. What's my best way to nail this timing?


Also I did a reset the pcm jeep was running great until I put a full tank of premium gas in the my idle started jumping around. I just replace the tps and I was thinking it could be that I got a bad one.I know the autozone ones are junk but I just replace emu if they give me trouble for new one. Now every once in awhile my idle will be sitting at 2500rpm. Tap the gas once or twice and will find itself again. There is no check engine light on either. Tps or fuel timing Idk?

Motor and everything bolted to it is new or less than 6 months old so any suggestions to improve combo? Things to look for or things I should plan on getting?

I emailed flying Ryan about a tune but looking for things I can do. Adjustable map? Injectors that are affordable? Cowl intake? I've read about every build on here but not a lot of what works best.

Also what estimated HP/TQ would a sorted combo like this make at the flywheel?

[Cheromaniac]

I can't seem to find out how to set fuel timing. I searched for the toothpick method but there is no hole on the side of my distributor. Since my cam is aftermarket I ground off the tab on the passenger side not the block side and rotated distributor maybe 3/16 counter clockwise and it ran much stronger but still seems off. What's my best way to nail this timing?

http://www.angelfire.com/my/fan/dist_index.html
Hope that helps.

Also I did a reset the pcm jeep was running great until I put a full tank of premium gas in the my idle started jumping around. I just replace the tps and I was thinking it could be that I got a bad one.I know the autozone ones are junk but I just replace emu if they give me trouble for new one. Now every once in awhile my idle will be sitting at 2500rpm. Tap the gas once or twice and will find itself again. There is no check engine light on either. Tps or fuel timing Idk?

If you index the distributor correctly, the idle will probably settle down after the ECU has had some adaptive learning time.

Motor and everything bolted to it is new or less than 6 months old so any suggestions to improve combo? Things to look for or things I should plan on getting?

A later-style curved runner intake manifold would be a nice addition.

I emailed flying Ryan about a tune but looking for things I can do. Adjustable map? Injectors that are affordable? Cowl intake? I've read about every build on here but not a lot of what works best.

Your stock injectors should be fine and a MAP adjuster doesn't work so well on OBD II Jeeps. Your build is mild so I doubt that a custom tune would be necessary.

Also what estimated HP/TQ would a sorted combo like this make at the flywheel?

If the head is stock and unported, I have you at 237hp & 315lbft.

[jsawduste]

I am critical of bored TB`s. Reason being the shaft, seals and bearings/bushings are not easily replaced. Often there is so much slop in the shaft that the throttle blade will hang up on the bore. Giving you exactly the symptoms you describe.

BBK is great.

[MoparNJeep]

Thanks for the quick responses. My jeep has the 1999 style manifold so I'm good there. Also the throttle body is not on motor as of yet but it is being done at my work on a cnc mill and only boring under the throttle blade.

I'll give the fuel timing another try after work. Thanks.

[MoparNJeep]

The fuel timing has been tricky as my cam is not stock and no one shows how to set it up with aftermarket cam. That description is more directed at stock cam.

[SilverXJ]

Its is not a big difference in the way you stab the distributor/cam sensor. I have a post where I did exactly that on my stroker.

[MoparNJeep]

I know I'm close. Does the 3mm spacing still apply With afaftermarket cam?
The link posted above doesn't even show the toothpick method. I search and that is the only pic I can fined. I seen a pic somewhere using a toothpick but it was vertical not horizontal in the distributor (the toothpick) which is different than how I've heard it described.

I know I'm close but got to be a way to get it right instead of guessing..

[FlyinRyan]

Left you a voicemail last week...