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anyone running a 350 with 2.1 box?

Keeth1123

Well-known member
Anyone running a Chevy 350 (not highly modified) with a 2.1 belt box? If so, what is it on and how does it run>?
 
I like mine it runs good. Slightly built. Destroyed a few positions had to. Rebuild it. Had to bite it .040 over and put a cam it’s spinning a 3 blade sensenich on pitch mark 15
 
Not an exact comparison but close in Hp/tq.

I ran a stock carbed 5.3 with a 2:1 gearbox. Motor was on a 14x7-6 alumitec with SS rigging set-up with 3/8" poly for fishing the gulf.
The motor was straight out of a wreck truck with 113K then was on a buddies boat for 2 years before I got it. (so it was not a fresh motor)

I tried a an early whirlwind think a stump puller 76" 2 bld, 80" 2 blade maximus and a 81.5" 2 bld R. 2 bld R ran the best cruised at 3200-3400 with a load and WOT as 5000. Ran about 46 and push good on the ground.

I was able to get a 2.68 box and put it on that motor I ran a 79" 3 bld R (was just what I got a deal on). It felt like a completely different boat. My motor liked the bigger ratio.
 
Had a friend that ran a stock 350 then 383 and now a 427 on a 2.09 with stump pullers.
Dude couldn't find his way to his front door if someone stapled a 6x6 degree wheel on it?
3 motors later and two major prop damages is all one needs to say "Had a friend"!
You know the type that preps there boat in the middle of the ramp?
 
Heck no I hate people that hog up the ramp. Last week I seen someone drying off a 1992 center console with faded paint. I mean if your gonna dry the damn boat it better have a slick paint job at least.

I ask the question because I was thinking of getting a spare motor (350) cause of a good deal, but have no idea how it performs on a belt.
 
If you ain’t looking to climb to the moon they run good before i Did my motor work it was a Stock 350 and it went everywhere it’s more about the boat set up than motor

When i first got my boat it wound not run the ground at all. Right before it blew because of to much timing i was climbing the levee the big boys play on.
 
Agreed!
Your going to pay to play and some pay regardless of playing?
It should do OK but maybe better served as a budget upgrade replacement as funds come ready!
It just depends on how you need to get back in! Everything breaks and wears out, but most don't leave the ramp thinking that.

Totally spare 350, why not go through it with plans to replace what your hesitant now with?
 
My old man ran a 14 ft airgator.....400 sb...with close to 475 torque... which is what people with boats need to be talking about not horsepower... Had an old 2/1k way... I was a lot younger but I remember that thing going just about anywhere.... But if you want to take six people straight up the side of a levy better get a big block was some fat Pizza pan blades....Whirlwind props makes an excellent three-blade for two to one only applications.... Working on a new boat now it will have a belt drive to 2/1. 383 of course but it's a 15 by 8 Hamant..... Some of these high gearbox ratios go pass me in the swamp and they sound like they're going to explode their wrapped up so high... What's that different strokes for different folks.... I myself like cruising about 32 to 3400.... With plenty of pedal to get me out of trouble still....
 
pierson skunkape said:
...with close to 475 torque... which is what people with boats need to be talking about not horsepower.....

Dead wrong. HP makes thrust, not torque. If you disagree, that's totally fine. I challenge you to prove your position though.

Enlighten me.

:salute:
 
OneBFC said:
HP makes thrust, not torque.
I guess them gear boxes are just a scam and everyone needs to get rid of em. All they do is increase useless torque, add weight, lighten your wallets and waste that precious HP.

Just all negatives it turns out. :scratch:
 
file.php
 
Slidin Gator said:
OneBFC said:
HP makes thrust, not torque.
I guess them gear boxes are just a scam and everyone needs to get rid of em. All they do is increase useless torque, add weight, lighten your wallets and waste that precious HP.

Just all negatives it turns out. :scratch:

Really? You know better brother....

Gear box just changes the prop shaft speed so the engine can operate at peak POWER.

Going to need more than that to prove a high torque motor will out thrust a high power motor.

500lbft/ 400hp turns way way less prop and makes way less thrust than 400lbft/500hp .

YOU KNOW THIS. Why fight it?
 
SORRY ABOUT THE HI-JACK Keith

Riddle me this one...….

IF on a dyno..... torque and horsepower always cross at 5252 rpm and IF someone built and ran their engine below 5252 rpm then would it not really only be about the TORQUE ?

TORQUE it's what horsepower envies !

Do you know what Torque said to Horsepower? I'm waiting.....LOL
 
SWAMPHUNTER45 said:
SORRY ABOUT THE HI-JACK Keith

Riddle me this one...….

IF on a dyno..... torque and horsepower always cross at 5252 rpm and IF someone built and ran their engine below 5252 rpm then would it not really only be about the TORQUE ?

TORQUE it's what horsepower envies !

Do you know what Torque said to Horsepower? I'm waiting.....LOL

https://docs.google.com/spreadsheets/d/1rWmdqlaT16PCqMiPDbV3pUc4kRc5o59HHge00bWnl-Q/edit?usp=sharing

NOPE!

:violent1: :banghead: :dontknow:

HP_Owns_You.JPG

:old_glory: :salute:
 
SWAMPHUNTER45 said:
SORRY ABOUT THE HI-JACK Keith

Riddle me this one...….

IF on a dyno..... torque and horsepower always cross at 5252 rpm and IF someone built and ran their engine below 5252 rpm then would it not really only be about the TORQUE ?

TORQUE it's what horsepower envies !

Do you know what Torque said to Horsepower? I'm waiting.....LOL


Lol
No worries I like reading all the debates. Hell, I’m
Thinking about starting up the ole

CARMOTOR IS BETTER THAN A/C motor thread

:cheers:
 
OneBFC said:
Slidin Gator said:
OneBFC said:
HP makes thrust, not torque.
I guess them gear boxes are just a scam and everyone needs to get rid of em. All they do is increase useless torque, add weight, lighten your wallets and waste that precious HP.

Just all negatives it turns out. :scratch:

Really? You know better brother....

Gear box just changes the prop shaft speed so the engine can operate at peak POWER.

Going to need more than that to prove a high torque motor will out thrust a high power motor.

500lbft/ 400hp turns way way less prop and makes way less thrust than 400lbft/500hp .

YOU KNOW THIS. Why fight it?

Didn't slidin gator write that his high torque A/C motor would make less thrust than the high HSP and low torque LS I am building? I think we need to put them on the thrust tester and find out.
 
OneBFC said:
500lbft/ 400hp turns way way less prop and makes way less thrust than 400lbft/500hp

according to my AC pocket protected fuzzy math excel calculator the engines have equal power and both exceed waterthunder thrust expectations :salute:

I challenge any CM calculators to prove me wrong!!

:stirpot: :fishing :stirpot: :fishing :stirpot: :fishing :stirpot: :fishing

thrust.PNG
 
The real question we need to ask is

Will a bass boat fly if you put wings on it? My lord, they already rip 100 mph by me on the ditch and now they draft so shallow they fish in the f#%*in airboat trail.

MADNESS
 
kwanjangnihm said:
OneBFC said:
500lbft/ 400hp turns way way less prop and makes way less thrust than 400lbft/500hp

according to my AC pocket protected fuzzy math excel calculator the engines have equal power and both exceed waterthunder thrust expectations :salute:

I challenge any CM calculators to prove me wrong!!

:stirpot: :fishing :stirpot: :fishing :stirpot: :fishing :stirpot: :fishing

thrust.PNG

:lol: Killing me !

Some physics for a refresher. Easy format.

https://www.engineeringtoolbox.com/work-torque-d_1377.html

A nice quote from that page sums it up well...

a machine must rotate to produce power! A machine with no rotation can deliver torque - like an electric motor - but since no distance is moved by force - no power is produced. As soon as the machine starts to rotate power is produced.
 
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