MAR FJ40
SILVER Star
Build MAR's '76 Forty Refresh
- Thread starter MAR FJ40
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Super clean look.
MAR FJ40
SILVER Star
- Thread starter
- #84
Getting prepped for first turn over of the Mosley cop motor 
. Removed the flywheel inspection cover and used a white paint pen to mark the TDC groove and outlined the hole where the bb should be. Not sure where the bb actually is. Maybe it never had one. Dunno.
Jacked up one rear wheel and put it in 4th gear. I was able to kick the tire while on my creeper under the rig watching the flywheel. Was much easier than I thought. Doesn't take much bump to get the flywheel to turn. Lined up to get to TDC. Also pulled the valve cover off to be 100% sure I was on compression stroke. 1-3 & 5 all even height and had just a tad bit of jiggle with my hand. I had pulled #1 spark plug, but Im not skilled enough to determine by looking/ feeling in the plug hole.
Had to take my lil mini Aussie girl, Bleu to the ER vet. Our Golden Doodle, Bodhi got on the counter and pulled down a 3lb bag of dog jerky, Bleu is 14 and doesn't chew well so she has been puking and lethargic and got to where she wouldn't move. No telling how many she ate. Bless her heart. Anyway, hopefully tomorrow Bleu will be better and I will crank the forty for the first time in 5 years!
. Removed the flywheel inspection cover and used a white paint pen to mark the TDC groove and outlined the hole where the bb should be. Not sure where the bb actually is. Maybe it never had one. Dunno. Jacked up one rear wheel and put it in 4th gear. I was able to kick the tire while on my creeper under the rig watching the flywheel. Was much easier than I thought. Doesn't take much bump to get the flywheel to turn. Lined up to get to TDC. Also pulled the valve cover off to be 100% sure I was on compression stroke. 1-3 & 5 all even height and had just a tad bit of jiggle with my hand. I had pulled #1 spark plug, but Im not skilled enough to determine by looking/ feeling in the plug hole.
Had to take my lil mini Aussie girl, Bleu to the ER vet. Our Golden Doodle, Bodhi got on the counter and pulled down a 3lb bag of dog jerky, Bleu is 14 and doesn't chew well so she has been puking and lethargic and got to where she wouldn't move. No telling how many she ate. Bless her heart. Anyway, hopefully tomorrow Bleu will be better and I will crank the forty for the first time in 5 years!
This is exactly what I did to find the BB when I installed the Holley Hyperspark. I took it a step further…I had a Wyze cam set on the frame centered on the timing hole and then had the video on my cell phone. Within a few simple turns of the tire, it showed up nicely
Looking really really nice
Poor girl….
Mine can’t leave my side
Looking really really nice
Poor girl….
Mine can’t leave my side
MAR FJ40
SILVER Star
- Thread starter
- #87
Her heart beats once again! Only had a little bit of time on Friday before catching a flight to go see my Vols lose to the sooners. I can't tell you how happy I am that it fired right up! Only ran it for 10 seconds or so after the video start. Verified oil pressure via mechanical gauge I installed on the oil cooler. Idle was a bit high and never came down in the short time I ran it, will need to begin troubleshooting. I did find I had a blockoff plate on a downspout on the headers that needed cinching up. Pre-start I found two small leaks from fuel line connections while priming the system, easy fix before firing up.
MAR FJ40
SILVER Star
- Thread starter
- #88
Found the source of the vacuum leak. Sprayed carb cleaner around base of the sniper and had instant RPM increase. Texted with Mosley and he let me know that no part of the adapter should be touching the isolater body and the adapter may need a bit of grinding on the end towards the head. Pulled the sniper, cleaned up the adapter and did a lil grinding on the lower side of the "arm" that captures the bolt head. Looks like that did the trick!. RPMs went straight within range upon firing it up. I verified static timing @ 15* with the timing light and adjusted the screw to get IAC between 2-10%. Running really good except I have some backfiring (intermittent popping) going on. Not sure next step to troubleshoot and fix that. I have a message out to Mosely but I figured I'd also tap the Mud brain trust in case it is a bit before he can get back with me...
Sound on video for intermittent backfiring...
Sound on video for intermittent backfiring...
Indeed - timing does look a bit on the aggressive side. Even with idle-spark enabled and in a high idle, I'm typically only around 10-12*. The AFR of 16.2 is also lean - there's another dashboard config for fueling that has target AFR vs actual, which helps to know if it's a tuning issue (target is also lean) or an install issue (it's trying to go richer but can't).
Edit: presumably "I verified static timing @ 15*" was via locking the static timing override on the Holley to 15* and comparing with the light, although doing that exercise locked to 7* would presumably be slightly easier as that would match the flywheel ball mark at 7.
My timing map FWIW - the laptop software is a bit twiddly but definitely helpful if you haven't ventured there yet.
Edit: presumably "I verified static timing @ 15*" was via locking the static timing override on the Holley to 15* and comparing with the light, although doing that exercise locked to 7* would presumably be slightly easier as that would match the flywheel ball mark at 7.
My timing map FWIW - the laptop software is a bit twiddly but definitely helpful if you haven't ventured there yet.
It’s 9:30pm and just got home to read this…my timing was 15* and it is too high…got it down around 12 and it is FANTASTIC… try dialing it down a touch
@zerotreedelta i am getting really nice performance out of my “wizard” produced setup details. I was able to get a windows 11 laptop and the correct cable for the Holley ECU to really dig into this fuel and timing map…. I had printed that 75+ page software manual and started reading it slowly 5 months ago. I am determined to look at these intelligently and really tune for the best performance I can. But, it’s running so nicely I have not yet “messed” with it.
Ironic, ain’t it
By performance…. I don’t mean the typical hot rodder kind of performance, it’s more like an athlete who has trained for an event and he is at the physical peak. I think we had discussed that before. Anyway I hope these efforts will do something for me.
@MAR FJ40 i had to grind the isolator plastic area where the header tabs are in the center of the manifold/header connection. Looks like you’re on the right track though. My idle is about 740 and why is the temp red at 188?
Ironic, ain’t it
By performance…. I don’t mean the typical hot rodder kind of performance, it’s more like an athlete who has trained for an event and he is at the physical peak. I think we had discussed that before. Anyway I hope these efforts will do something for me.
@MAR FJ40 i had to grind the isolator plastic area where the header tabs are in the center of the manifold/header connection. Looks like you’re on the right track though. My idle is about 740 and why is the temp red at 188?
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One of the nice things on the Hyperspark is that it's infinitely flexible - there's no need to add base timing to get extra advance up top like a mechanical dizzy. You can crank at 7* for easy starts, idle at 10*, but still have 35, 40, whatever for the max advance your setup/fuel combo will tolerate.
Mine has a few degrees sprinkled in up top and a couple degrees over factory-base, but I also just run 87. I *think* the Mosely tune is more aggressive, and possibly also geared to 91...but I've only done my own tuning.
Edit : I also had to grind the notch in my adapter to clear the lip on the heat riser plate. One of those quirks...
Mine has a few degrees sprinkled in up top and a couple degrees over factory-base, but I also just run 87. I *think* the Mosely tune is more aggressive, and possibly also geared to 91...but I've only done my own tuning.
Edit : I also had to grind the notch in my adapter to clear the lip on the heat riser plate. One of those quirks...
MAR FJ40
SILVER Star
- Thread starter
- #94
The tune I have loaded from Mosely has the cranking timing set at 15*. When I set the static timing to 15* and the timing light to 15* the pointer is dead on the TDC line, not the BB. I know enough to get me in trouble, in other words, I'm lost but trying to find my way. Haven't ventured to the timing map, I'm learning as I go through this process
. As long as I don't blow this motor up, it's fun trying to figure it out on the "fly".
MAR FJ40
SILVER Star
- Thread starter
- #95
I played around changing the static timing anywhere from 7-20 just briefly to see how it responded. Feels like it runs smoothest set around 15, which is what is set in the tune I have loaded. Mosley says he has other tunes he can send me to try out that may eliminate the backfiring I'm seeing. I don't have enough knowledge of engine/EFI tuning at this point - kinda running blind, but learning as I go.
It's definitely a good space to learn - just curious, are you running 91 vs 87 for the breathed-on Mosley?
MAR FJ40
SILVER Star
- Thread starter
- #100
Got the amby doors in place today. Driver/passenger doors and top on the list for next week. Just need to fill/ bleed brakes and clutch and I'll be ready to drive around the block. Will get back on resolving popping shortly. Still have plenty to do, but can't wait to take her for a spin.
