It wasn't mentioned earlier, but did or were you able to hook up the vss on the Transfer case to the gm pcm? Otherwise isn't the speedo and shifting and everything else that needs that info for 4 low out to lunch? Also, did you use a Dakota digital box for the speedo?
Builds A 1994 80 Series gets an LQ9 GM V8 (1 Viewer)
- Thread starter 35inchoverdrive
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RockJock82
Sometimes you have to kick a little A$$
There is spot in the tcase adapter that you attach the GM Vss to. The stock Toyota Vss is retained for the speedo. Digital Dakota box is to convert the tach signal
This. Is. Amazing. Well done, and very fast work. Bravo.
Skrewball
TLCA#18502
The stock transfer case mounted speed sensor is working just as it was before the swap. This truck has the Marks adapters calibration box on it to adjust for tire size so the original speedometer is accurate. The GM ECM gets its speed info from the VSS at the rear output of the transmission. I adjusted the calibration in the ECM to match the accurate vehicle speed. Technically the transmission sees a faster speed than what the vehicle is doing in low range. If it were a problem shifting in low range we would have addressed it, but it just upshifts faster than desired in low range. A stock 80 upshifts too quick in low range anyway. Usual use in low range would be to manually select the gear you want to be in, which is why we made sure to make the shifter shift through all the gears available. We did not need to use a Dakota Digital box for the speedometer, as it is currently working like stock.
We did use the Dakota Digital box for the tach. If the truck didn't have the Marks adapters converter for the speedo, we would have put a Dakota Digital box in for the speedo. The original speedo operation is a separate function from the engine swap.
Ok, so I just finished reading this write up..... now I need to go take a cold shower.
Man, is that awesome!!! Loved the sound of that and I would love to hear how it tows!
Man, is that awesome!!! Loved the sound of that and I would love to hear how it tows!
35inchoverdrive
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We did a tow test with it just the other day.
It was around 6,500 lbs with the trailer and buggy. The brakes were the limiting factor for sure, but it has some sticky pads and slotted rotors, and the trailer brakes work well. It pulls REALLY well. Accelerating up hills was not a problem.
"Accelerating up hills was not a problem." - SWEET! This is a huge reason why I am looking at a 200 series. Would love it if my 100 had as much power as this 80! Loved my 80, but now it is serving my son in the Army.
I can understand the brakes being the limiting factor now! With that power plant, torque should not be an issue! Great job on he conversion!
I can understand the brakes being the limiting factor now! With that power plant, torque should not be an issue! Great job on he conversion!
I am surprised there isn't a way to put bigger brakes and calipers under our rigs, there has to be something that can me modified to work. Bigger rotors and calipers should do the trick at stopping these beasts.
35inchoverdrive
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Thanks! The nicest thing about this truck isn't wide open throttle. Don't get me wrong, flooring it is cool, but it's the every day driving that is so nice.
thanks for that vss info, and the update on this rig. Looks stellar!
RockJock82
Sometimes you have to kick a little A$$
100 series is the next territory. Imagine 400hp in one of those
"100 series is the next territory. Imagine 400hp in one of those " WOW!!!
" WOW!!!
890man
SILVER Star
I love this swap. I wish my stocker would blow so I could convince the CFO that this would be a good idea. It would be best right before an end of year bonus, hmmmm.
I don't remember reading about the diff gears, what is recommended for this conversion. I plan on going with 4.88's, the lower transfer case gears and 37's. Would that work well?
I don't remember reading about the diff gears, what is recommended for this conversion. I plan on going with 4.88's, the lower transfer case gears and 37's. Would that work well?
35inchoverdrive
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- #334
We offer covert engine sabotage for a very competitive price.
The gears in this truck are stock and it's running 33's. It feels like the sweet spot for all around use would be 35's and stock gears, but this particular customer does lots of towing and has no desire or need for 35's, so this setup works out well for him. Maybe a couple of the other LS-powered 80 guys will chime in with their long term day-to-day experiences(although I don't remember any of them running 37's). I would expect that the 4.88's with an LS and 37's would be a pretty nice setup.
Stock LC gears with 35's and standard 4L60 will put the overall ratio between the base LS engine Silverado (3.42 final) and the "Heavy Duty" towing package (3.73 final) So no real world testing but the numbers look good to me. With the 37's it may be a closer feel to the base Silverado. If you go 4.88, 37, plus the swap that would make a sweet crawler, but probably too low for highway cruising.
Where do you guys get your tubing for the fuel and other hydraulic lines? Does it come in a roll or in straight lengths?
35inchoverdrive
Forge Specialties
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You can get it in straight 72" sections from most parts suppliers.
SmokingRocks
hopelessly addicted to Cruisers
So has anyone asked what you did with the blown 1fze?
35inchoverdrive
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- #339
Long before the LQ9 swap started, the 1FZ that it replaced, went into another 80. It's a long rambling story that started with a supercharged OBDI 80 that ended up with that OBDI engine being "converted" to OBDII and stuffed into a later 80 that didn't have an engine.
I am currently putting a 6.0 LQ9 in a 94 FZJ80. I would love to have a copy of the wiring interface spreadsheet. Email is lafdchief1@live.com, Troy.
