โMay-19-2018 05:01 PM
โMay-23-2018 07:39 AM
โMay-22-2018 03:28 PM
BenK wrote:
Similar to my nooddling plans for my 1996 7.4L K3500 Suburban. Stock is 4.1's and noodling going to something north of 4.56's. Currently think 4.88's will be it, but can't find enough info on that config's strength. IIRC, the pinion might be too small (both face sq/in and tooth root section...cantilever strength)
First, gear boxes are for a change in direction and/or torque multiplication (some times just a change in RPMs)
Here are the listed ratios for my 4L80E:
Gear Ratio
First 2.48
Second 1.48
Third 1.00
Fourth 0.75
Here is just one link to a +1,000 HP 4L80E and cost is similar to a plain Jane rebuild locally vs the 750HP version. The +1,500HP version just a couple thousand more...all warranted
Stage 2 โ Warranted 750 HP...Stage 5 - Warranted +1,500HP
The Gear Venders OD noodling and is whether an 0.7 or 0.5 ratio that will split (insert itself) between each 4L80E gear. That would turn my 4L80E into an EIGHT forward gearbox and if you count the XfrCase...16 forward gear ratios...and...a lower 1st gear ratio than the 4L60E...AND...a similar to potentially higher OD final...
Here are the resultant gear ratios
Click For Full-Size Image.
Then switch from LT265/75R16E's to LT255/85R16E's for a LOWER rev's per mile and still not lose much in width...just 10mm, or 5mm each side of rim center.
Toughest part is finding a HO crate 7.4L that will pass SMOG. Most found to date are offroad and/or carberator. No Vortec to be found.
The guy who built the L88 for my Vette has passed on and no one even understands what an L88 was/is... Sure an L88 was a hot rod engine, but most of it can be for a TV...all in the cam...
Click For Full-Size Image.
โMay-22-2018 12:50 PM
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