New 4.6L stroker build

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YJason
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Re: New 4.6L stroker build

Post by YJason »

I've got a 8 x 14 external cooler, which has plenty of cooling capacity. Nothing too extreme, 33's w/4.10's. I was PM'ing a trans rebuilder last night on another sight that says I have 1 or more clutch packs burned up thats causing it to get hot that quick.

I'm on my 2nd AW4 trans, the 1st had 155k on it and it would just stop pulling. If I would stop put it in park, shut it off, then restart it, it would run fine for a little while and start the sequence all over. This AW4 is a $200 JY trans, I'll probably go get another this weekend. A lot of people like the AW4 but I'm not a fan at least the local JY shows to have 18 AW4's in stock, in case I need another :brickwall:
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

I'm not entirely sure what happened to my AW4. All I know is that it started to make a noise after Titan replaced an engine themselves. I'm thinking its the pump, nut a new pump is around $200. I should have just replaced the whole transmission instead of buying a new torque converter.

I also thought about swapping to a manual transmission, but that would require too much $$$ right now. I would need the trans, clutch, brake pedal, clutch pedal, wiring harness, PCM, bell housing, shifter and boot, cross member, pilot bearing, flywheel, and I would probably need to get the drive shafts lengths changed,
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

Received the Isky cam yesterday... sooner than I expected.

Image

The surprise was that for some reason they cleaner up the shaft between the lobes quite a bit. An unmodified shaft measures 1.265" in the bare cast sections. Where Isky machined it measures 1.08". Wonder what their reasoning is... looks? weight reduction?

Image

Don't think I am going to get to run a break in this week as I am still waiting for a few other small parts to come in and still need to swap the transmission.
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

Just got back from vacation in the outer banks Saturday. I have all the parts so I started to put it back together today. The crank went in fine, all the bearing clearances between .0015" and .002" using plastigauge, snout run out was .0015", flex plate mounting flange run out was .001", and crank end play was .0055". All the crank measurements are in spec. I also double checked for interference and there plenty room around the rods, counter weights, etc. So the crank looks good.

Everything was going fine until I went to degree the cam in. All the events were off by 14*. Isky ground the cam 14* retarded. Even with the adjustable timing set I cam only retard or advance 8*, so if I advanced it it would still be 6* retarded. Which makes it unusable. After work I'm going to double check my numbers then call Isky. Which means I will have to wait another 2 weeks for a cam. Shit... why is it so hard to get parts that work?
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Re: New 4.6L stroker build

Post by Cheromaniac »

I find it hard to believe that Isky could have ground the cam as much as 14* retarded. Are you sure you don't have the timing set installed one tooth off?
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

I checked the dots several times, but I'm going to take the timing set off and reinstall it. I hope that is the problem... if not I could try to install it out of alignment to try to correct the timing.
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Re: New 4.6L stroker build

Post by SilverXJ »

I went back today and went over it again. I thought I installed it dot to dot and it was still off. So I just moved the cam gear back one chain link and tried it again. It matches the specs pretty well now. Its still dot to dot though, so I don't know about how I managed to install it wrong 3 times. I'm just glad i degree'd it in. If not I would have not caught the error and had crappy performance.
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Re: New 4.6L stroker build

Post by the_wrench116 »

SilverXJ wrote:Received the Isky cam yesterday... sooner than I expected.

Image

The surprise was that for some reason they cleaner up the shaft between the lobes quite a bit. An unmodified shaft measures 1.265" in the bare cast sections. Where Isky machined it measures 1.08". Wonder what their reasoning is... looks? weight reduction?

Image

Don't think I am going to get to run a break in this week as I am still waiting for a few other small parts to come in and still need to swap the transmission.

i would guess that they do it for the fact that the smoother surface is less prone to stress risers and brakage. my .02
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ATK on the way then an OBD 2 swap so flyin ryan can tune.
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

I asked my contact at Isky about the machining. He said it was just for looks.
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Re: New 4.6L stroker build

Post by dwg86 »

SilverXJ wrote:I went back today and went over it again. I thought I installed it dot to dot and it was still off. So I just moved the cam gear back one chain link and tried it again. It matches the specs pretty well now. Its still dot to dot though, so I don't know about how I managed to install it wrong 3 times. I'm just glad i degree'd it in. If not I would have not caught the error and had crappy performance.
Its always good to degree your cam. I ran into the same problem when I was degreeing my cam. It looked like the dots were lined up, but the cam timing was off. after I got the dots lined up correctly, my cam was off 2 degrees. I had to retard it 2 degrees to get it right. I like the JP Performance timing chain with all the degree slots.
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

I did degree the original Comp Cam in and I got it right the first time. As I said I am really glad I did it this time around to considering I was considering just installing it and being done with it.

Here are my numbers. The numbers from the grind card are first followed by mine in parentheses. I'm not really sure mine is actually off enough to change the timing any. Also, most of the number have some variance.

Intake timing:
Seat open: 21 (23)
.050 open: -4 (-3)
Seat close: 57 (56)
.050 close: 32 (31.5)
Centerline: 108 (107)

Exhaust timing:
Seat open: 68 (68)
.050 open: 43 (43.5)
Seat close: 16 (15)
.050 close: -9 (-10)
Centerline: 116 (117)
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

Got the engine back in yesterday.. after pulling and installing an engine innthis vehicle 4 times I'm getting good at it. I also swapped the transmission today. Just need to finish up the lose ends like hoses and wiring. I also am waiting on a transmission hose to come in as the one from the bottom of the radiator developed a crack. Besides that I still have to put the radiator back in, but I am waiting for the tranny line so I can re do the hoses on the external tranny cooler. I should be doing the cam break in by this weekend if not earlier. I hat breaking the cam in. Ugh.

I had a dream last night that I had the engine back in but my the hesitation was still there. Yeah.. I just need things to work and a break.
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

Its almost 100% back together. I still have to do the radiator and cooling hoses. But there is a reason for that. I found that the lower transmission cooler hose was cracked so I ordered a new one from Advance Auto. It was suppose to come in the 15th. It wasn't there. I go in on the 16th and get them to track it. The tracking said it was scheduled to be delivered on the 16th but it was damaged. So I get the tracking number and head over to the local UPS center and ask them to see what damaged meant. UPS calls the driver and he says that it was shipped in a plastic bag and the plastic bag was torn and empty. Great. I go back to Advance and tell them what UPS told me and they order a new, which should be here Friday. Aside from that I found another transmission line that is getting ready to crack and need to replace that, but that is easy as doesn't have any stupid/special fitting on it. Can my luck get any worse?
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Re: New 4.6L stroker build

Post by the_wrench116 »

with your recent luck i don't think that i would have asked that question. :cheers: but heres to hopping that the demons have be cast out.
92 XJ 4D custom borla header 3" exhaust flowmaster 50series muffler.

ATK on the way then an OBD 2 swap so flyin ryan can tune.
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SilverXJ
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Re: New 4.6L stroker build

Post by SilverXJ »

The part is in, need to pick up some 3/8" transmission hose. I need to finish the tranny hoses, install the radiator and hoses, fill the system then have lunch. Come back and top off the radiator then fire it and do the cam break in. All today. Wish me luck. I'm a bit nervous... I hate cam break ins.
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