I think with the injection, a 2.8 pulley would be fine. If the injection system ever failed, you would still be able to baby it along. That is assuming it's an obd II truck. Obd I runs leaner so I hear.
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1973Guppie
Supporting Vendor
thx for pics, that's where I was thinking of installing it, I would be using the stock snow tank that comes with the kit. Will need to find some spot for it and make a custom bracket somewhere due to the dual batt's.
1973Guppie
Supporting Vendor
mines a 96, obd 2, I would plan on carrying a quart of methanol or 2 near the stock battery box for emergencies....
- Thread starter
- #64
Super cool. Thanks for the insight guys. It's cooling down here in northern NV, so I'm going to first try a couple of pulley sizes per scottyrana's suggestion regarding knock monitoring. Then I'll go with the meth injection in the spring....
i need to make a custom pulley puller to get my stock pulley off, otherwise, I will have to pull the charger to get a normal puller on it. Just gotta make time to do it. I've got my snowmobile pulled apart and it's almost winter, my daughter's 80 in the garage for a head gasket (for me to drive this winter) , and lots of firewood to cut. Minor setbacks
- Thread starter
- #66
PS- here are the full measurements, now confirmed with Pulley Boys, on the stock pulley-
4.5L TRD Keyed Pulley
Pulley Boys Six Groove Keyed Pulley for 4.5L TRD Style Supercharger Kits
Stock Size is 3.25"
Available in 2.8", 2.9", 3.0", 3.1", and 3.2".
Nose Drive Pulleys Fits:
FZJ80 4.5 Liter 1995-1997 Toyota Land Cruiser TRD Style Supercharger Kits
Made from hard anodized 6061 T6 billet aluminum.
Only available in black.
18%
SKU 6KA
Weight 1.00 lbs
Pulley Type Keyed
Pulley Offset 0.4" (10.16mm)
Pulley Grooves 6
Shaft Diameter 0.64" (16.256mm)
4.5L TRD Keyed Pulley
Pulley Boys Six Groove Keyed Pulley for 4.5L TRD Style Supercharger Kits
Stock Size is 3.25"
Available in 2.8", 2.9", 3.0", 3.1", and 3.2".
Nose Drive Pulleys Fits:
FZJ80 4.5 Liter 1995-1997 Toyota Land Cruiser TRD Style Supercharger Kits
Made from hard anodized 6061 T6 billet aluminum.
Only available in black.
18%
SKU 6KA
Weight 1.00 lbs
Pulley Type Keyed
Pulley Offset 0.4" (10.16mm)
Pulley Grooves 6
Shaft Diameter 0.64" (16.256mm)
I lost 2 seconds on 0-60 going from 3.25" to 2.6".
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- Thread starter
- #68
Did you have trouble with clearance with the 2.6"? Also, did you have any issue with engine knock?
1973Guppie
Supporting Vendor
huh? please explain, logic would seem you would be going faster, ie: more boost???
1973Guppie
Supporting Vendor
That's funny S#%^!
Don't feel too bad, I took it the wrong way too! I get it now. Have another oneok, now I feel like a dumb ass, lol.
- Thread starter
- #74
I just dropped in the 2.8" pulley wheel and have noticed a positive difference, albeit subtle, going uphill. No knock, no codes, everything looking fine in fall weather. I am dubious I've gained anything beyond a second on a 0-60 pull.
I'd take that second. Nice
- Thread starter
- #77
Guys, I forgot to finalize this thread... I did wind up getting a 2.8 pulley, which consistently pulls at about 5-6 PSI based on my cheapo boost gauge. I will be purchasing the Snow Performance meth injection here shortly... and ahead of Cruise Moab 
I have no issues running regular fuel.
here is something I'd like to see.
Get on the highway in 2nd gear and record the timing through the OBDII port at WOT.
At 4800 rpms I'm at 40* btdc, with the stock timing adjustment
I don't think you guys are near that high.
Get on the highway in 2nd gear and record the timing through the OBDII port at WOT.
At 4800 rpms I'm at 40* btdc, with the stock timing adjustment
I don't think you guys are near that high.
