anyone running a 350 with 2.1 box?

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Slidin Gator
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Re: anyone running a 350 with 2.1 box?

Post by Slidin Gator » Sat Jun 01, 2019 3:08 pm

So the argument for killing the torque myth is the perfect torque curve? I guess it's just arguing for the sake of making noise.

I'm just gonna scratch the Ecotec of my list of future engines. There are many factors to consider when buying, #1 in this case is the salesman.
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

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Re: anyone running a 350 with 2.1 box?

Post by OneBFC » Sat Jun 01, 2019 3:49 pm

I am sure the ecotec sales person will or would be devastated? LS engine comparison is far and away even more obvious which is better from a performance perspective.

I am not selling anything but knowledge.

Use it how you wish. Not meant any other way.
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-----------------------------------
The only thing stopping you is FEAR
400+hp Ecotec, 12x7.6 DBDO, 80" 3B Maximus, 2.3 OX,85+mph, water = purely optional
Life begins at 2 BAR, Just a good ole boy

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Re: anyone running a 350 with 2.1 box?

Post by br,lc,LA » Mon Jun 03, 2019 3:30 pm

Torque is nothing but cylinder pressure x cylinder area x crank lobe offset

It is absolutely useless number w/o rpm being involved and torque x rpm = HP

If you want to run your engine at high torque which equals high cylinder pressure and lug the motor all the time... by all means let it blow!

That's my $0.02
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Re: anyone running a 350 with 2.1 box?

Post by SWAMPHUNTER45 » Mon Jun 03, 2019 7:11 pm

Torque equals usable power, horsepower is great...luv it... but... don't need the noise and don't like to wait for my snap!

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Re: anyone running a 350 with 2.1 box?

Post by kwanjangnihm » Mon Jun 03, 2019 8:02 pm

Image
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Re: anyone running a 350 with 2.1 box?

Post by Keeth1123 » Mon Jun 03, 2019 8:08 pm

kwanjangnihm wrote:Image

Always make me laugh with these memes
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Re: anyone running a 350 with 2.1 box?

Post by Deano » Mon Jun 03, 2019 9:08 pm

Image
"The suppression of uncomfortable ideas may be common in religion and politics,
but it is not the path to knowledge; it has no place in the endeavor of science."
- Carl Sagan

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Re: anyone running a 350 with 2.1 box?

Post by Slidin Gator » Mon Jun 03, 2019 10:02 pm

Deano wrote:Image
:lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:
About busted a gut on that one :thumbleft:

I guess no one else has any actual useful input for Keeth? Consensus is get another 350 motor with a 2:1 for cheap and get on with it?
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

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Re: anyone running a 350 with 2.1 box?

Post by OneBFC » Mon Jun 03, 2019 10:22 pm

Consensus is get another 350 motor with a 2:1 for cheap and get on with it?
Yep, I agree. No messing with rigging or any other cans of worms when you go changing stuff.

Done and back to sliding.
-Russ
-----------------------------------
The only thing stopping you is FEAR
400+hp Ecotec, 12x7.6 DBDO, 80" 3B Maximus, 2.3 OX,85+mph, water = purely optional
Life begins at 2 BAR, Just a good ole boy

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Re: anyone running a 350 with 2.1 box?

Post by SWAMPHUNTER45 » Mon Jun 03, 2019 10:51 pm

I would be looking for a 383 or 400 since they make more TORQUE!

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Re: anyone running a 350 with 2.1 box?

Post by Slidin Gator » Mon Jun 03, 2019 11:09 pm

See Keeth, consensus is to gear that 350 and turn it. Sure, you gotta change all the rigging to turn a bigger prop (gotta buy that after all), move the motor stand forward to make room for the belt drive. Probably change the seating and rigging to make room for the engine, now moved forward. Yep, throw some gear at the problem and make some damn Hp! Hp is free and all.

Wait, my right hand man is talking, damn Torque Devil. What's that Swamp, uh, I mean Devil?
SWAMPHUNTER45 wrote:I would be looking for a 383 or 400 since they make more TORQUE!
Keeth, Unbelievable as it sounds, there is another option. It turns out for a bit more money vs. a stock reman you can build a 383 stroker and wake your rig right up! Seriously, Keeth can keep all your stuff the same, just rebuild the bottom end with a stroker package and find some throw away 305 heads to make compression? Turns out that this will make more Torque and I now understand that higher torque at 2,850 RPM actually equals increased Hp! What a trip, I learn something new every day :violent1:

Keeth, time to pick a team, :stirpot:

Just like Smokey the Bear said about preventing Forest fires:

Image
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

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Re: anyone running a 350 with 2.1 box?

Post by SWAMPHUNTER45 » Tue Jun 04, 2019 6:21 pm

I have seen a 13ft glass boat running around with a junk yard sbc take out that ran very well.

1973 Chevy 400 with a 2 barrel Rochester carburetor, it came out of a 4 dr Caprice Classic. Had long tube headers and a HEI upgrade with good curve.

Ran dry with 2 adults like it was no trouble at all

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Re: anyone running a 350 with 2.1 box?

Post by Keeth1123 » Tue Jun 04, 2019 7:13 pm

Well I currently run a 400 with a belt box. Does really well for me. I only started this thread because I had to do some fixing. Had to replace the head gaskets because I think the steam holes worked one loose.

. Put in some high dollar gaskets, aluminum locking rockers, new rods and lifters. Running great again. I just like to read the posts lol
:old_glory:

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Re: anyone running a 350 with 2.1 box?

Post by SWAMPHUNTER45 » Tue Jun 04, 2019 8:15 pm

They don't like a lot of rpm but they are a great engine

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Re: anyone running a 350 with 2.1 box?

Post by flcracker9 » Wed Jun 05, 2019 7:53 am

kwanjangnihm wrote:
OneBFC wrote: 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
Looks like we may have attended the same schools :lol:
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Re: anyone running a 350 with 2.1 box?

Post by flcracker9 » Wed Jun 05, 2019 8:04 am

Birddog247 on this site runs an old 350 that he pulled from a van, 2:1 gearbox, 2 blade R, on an aluminum hull, and I've yet to see him sruggle on the hill with 2-3 people. The belt box in question weighs more than his gear box, but the combo operates the same. Set-up would dictate how it performs, but the generic question was "anyone running a 350 with a 2:1 box", and I'm sure there are plenty of boats running that combination. Set up right, it can be a point and go combo.
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Re: anyone running a 350 with 2.1 box?

Post by digginfool » Wed Jun 05, 2019 8:38 am

flcracker9 wrote:Birddog247 on this site runs an old 350 that he pulled from a van, 2:1 gearbox, 2 blade R, on an aluminum hull, and I've yet to see him sruggle on the hill with 2-3 people. The belt box in question weighs more than his gear box, but the combo operates the same. Set-up would dictate how it performs, but the generic question was "anyone running a 350 with a 2:1 box", and I'm sure there are plenty of boats running that combination. Set up right, it can be a point and go combo.
Not only does Pat run it, Spencer does, too (I believe his ratio is actually 2.09:1 but close enough), although he's got a 5.3 he's mulling over replacing the 350 with.
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Re: anyone running a 350 with 2.1 box?

Post by kwanjangnihm » Wed Jun 05, 2019 8:40 am

always worth repeating on the weights of gearboxes

CH3 Belt Box
Upper Unit----60lbs
Lower Unit with bearing----23 lbs
Main Housing-------42lbs
All bolts and belt----7lbs
Total---------132lbs

Rotator Gear Box 70lbs

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