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by CarMotorBarge
Sun Jun 28, 2020 8:45 am
Forum: Airboat Talk
Topic: 6.2 ls engine options
Replies: 16
Views: 2458

Re: 6.2 ls engine options

Just put any A/C motor on it. You will be fine.
by CarMotorBarge
Sat Feb 08, 2020 6:03 am
Forum: Airboat Tech
Topic: I'm Building 2 Stossel Boats with High Torque Motors
Replies: 145
Views: 27692

Re: I'm Building 2 Stossel Boats with High Torque Motors

That was very unfortunate what happened to Mert. Mike took me for a ride on the maiden voyage of Mert's boat in Gopher Slough. It was a nice running boat. 8)
by CarMotorBarge
Fri Feb 07, 2020 6:06 am
Forum: Automotive Power Only
Topic: Cylinder head Intake port size requirement for LS 427
Replies: 10
Views: 1637

Re: Cylinder head Intake port size requirement for LS 427

I think 2200 RPMs is the maximum RPM for that prop. If you plan to turn the motor at 6000 at WOT, you need to use at least a 2.68 ratio. Especially with a 4 blade. A 4 blade SW will put significant load on the motor.
by CarMotorBarge
Thu Feb 06, 2020 6:47 am
Forum: Automotive Power Only
Topic: Cylinder head Intake port size requirement for LS 427
Replies: 10
Views: 1637

Re: Cylinder head Intake port size requirement for LS 427

My Father in Law has been building conventional SBC for strip and dirt track for decades and is pretty notable in East Texas thru Tennessee area. Last year brought him down for his first airboat experience and he got to experience first hand the constant loads that we put on our rigs. He has since ...
by CarMotorBarge
Wed Feb 05, 2020 6:06 am
Forum: Automotive Power Only
Topic: Cylinder head Intake port size requirement for LS 427
Replies: 10
Views: 1637

Re: Cylinder head Intake port size requirement for LS 427

Thanks for the input CMB...… So back to the original question …. I believe the stock LS7 head intake runners are 260cc with a 70cc combustion chamber resulting in a 11:1 compression ratio. What if any should I deviate from that may result in over all performance. Will be running a carbureted set up...
by CarMotorBarge
Tue Feb 04, 2020 4:43 pm
Forum: Automotive Power Only
Topic: Cylinder head Intake port size requirement for LS 427
Replies: 10
Views: 1637

Re: Cylinder head Intake port size requirement for LS 427

Its a New Dart LS NEXT steel block, standard deck, 4.125 Siamese bore, clearance for a 4.100 stroke, sleeves extend down from the holes 0.375. So yeah I guess it would be considered a LS7 hybrid. Compstar 4" Crank and 6.125" rods 12 degree Diamond pistons - dish TBD once heads are sourced I would g...
by CarMotorBarge
Tue Feb 04, 2020 7:06 am
Forum: Automotive Power Only
Topic: Cylinder head Intake port size requirement for LS 427
Replies: 10
Views: 1637

Re: Cylinder head Intake port size requirement for LS 427

Currently researching and planning a LS 427 build, I have the block and rotating assembly sourced and now researching cylinder heads. Expecting to turn 6k RPM. As a base number I believe the stock truck 6.0L lQ9 intake port is 210 cc Most aftermarket aluminum 7.0L heads have the large square intake...
by CarMotorBarge
Fri Jan 24, 2020 5:45 am
Forum: Automotive Power Only
Topic: Carbed 6.0 LS fuel pump
Replies: 8
Views: 1484

Re: Carbed 6.0 LS fuel pump

You need to put blue lock tite on those bolts. Vibration from the prop loosens stuff over time.
by CarMotorBarge
Tue Jan 21, 2020 5:57 am
Forum: Prop Talk
Topic: 502 prop help
Replies: 6
Views: 1500

Re: 502 prop help

Can't beat the push of wide or super wide blades on the hill. 8)
by CarMotorBarge
Tue Dec 31, 2019 8:30 pm
Forum: Airboat Talk
Topic: ls water sensor question
Replies: 2
Views: 819

Re: ls water sensor question

The temperature sender for the wiring harness goes in the front of the driver side head. The temperature sender for the instrument panel goes in the passenger side of the water pump. You also need to run crossover tubes between the heads.
by CarMotorBarge
Tue Dec 10, 2019 5:44 am
Forum: Prop Talk
Topic: 502 prop help
Replies: 6
Views: 1500

Re: 502 prop help

A warp drive is pretty much the worst prop for pushing on the hill. An 82 inch 3 blade wide or super wide prop will push better on the hill.
by CarMotorBarge
Mon Dec 09, 2019 6:15 pm
Forum: Airboat Tech
Topic: Boat Build
Replies: 16
Views: 2254

Re: Boat Build

Found one locally for 2k obviously it would have to be gone through as it has over 90k miles on it but from everything know I'm assuming a purpose built motor would be any motor that makes most of its power in lower rpms I know I'm still green with the whole airboat thing I'm learning as I go I kno...
by CarMotorBarge
Mon Dec 09, 2019 6:42 am
Forum: Airboat Tech
Topic: Boat Build
Replies: 16
Views: 2254

Re: Boat Build

So after 15 years of riding on other people's boats it's time to build my own starting in march I will be compiling parts putting my boat together. So here's what I want. Set up 16x8 ¾ deck deep side (atleast 24") aluminum hull 4 split seats with removable single front seat top seat captain Power 6...
by CarMotorBarge
Fri Nov 08, 2019 7:15 pm
Forum: Site Related
Topic: Website having some problems this morning...
Replies: 7
Views: 1313

Re: Website having some problems this morning...

Need to build a wall around China. We can use the Great Wall as a starting point. 8)
by CarMotorBarge
Sun Nov 03, 2019 8:35 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

I run my motor between 5800 and 6200 at WOT with an upgraded valve train. With your WOT at this RPM, what does your cruise end up at? Also, what Computer are you running and what gas do you run on? Here we have 87, 89, and 91/92 octane available and we are tuned to run on 87/89. Also, you asked if ...
by CarMotorBarge
Fri Nov 01, 2019 6:59 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

You could also put on some LS3 heads and an LS3 intake. With the proper cam, this would pick up some HSP. Just comes down to how much money you want to spend.
by CarMotorBarge
Fri Nov 01, 2019 6:56 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

Here are my cam specs:

Image

Remember that I have 55 more cubic inches. Also I run my motor between 5800 and 6200 at WOT with an upgraded valve train.
by CarMotorBarge
Thu Oct 31, 2019 6:16 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

What RPM are you planning to run the motor when at WOT? Are you OK with a choppy idle? What gear ratio and prop are you using? I don't necessarily have a WOT target for the build, but rather a target for cruise RPM around 3200-3400 RPM. I am OK with a choppy idle. Right now I am running a 2.68 Stin...
by CarMotorBarge
Wed Oct 30, 2019 6:32 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

This is the year 2019. There is nothing wrong and minimal impact on longevity when running a properly built LS from 5500 to 6500 at WOT. The factory LS2 in the Corvette redlines at 6600 to 6800. Make sure you have a good top end and a proper tune. Running an LS at 5100 WOT with a 2.3 is actually har...
by CarMotorBarge
Wed Oct 30, 2019 5:52 am
Forum: Automotive Power Only
Topic: 6.0l LS2 rebuild looking for more power
Replies: 20
Views: 3043

Re: 6.0l LS2 rebuild looking for more power

What RPM are you planning to run the motor when at WOT? Are you OK with a choppy idle? What gear ratio and prop are you using?
by CarMotorBarge
Thu Sep 05, 2019 8:10 pm
Forum: Airboat Talk
Topic: Gearbox power reduction question
Replies: 13
Views: 2645

Re: Gearbox power reduction question

Ya this LS stuff is a bit challenging with so many tunes and cam grinds available. Im just trying to figure out how many blades I can spin with x given torque/hp Based on my experience, roughly 550 HSP will spin a 4 blade 83.5" R. This doesn't mean build an engine that makes 550 HSP at 6200 RPMs an...
by CarMotorBarge
Thu Sep 05, 2019 1:26 pm
Forum: Airboat Talk
Topic: Gearbox power reduction question
Replies: 13
Views: 2645

Re: Gearbox power reduction question

Power loss or thrust loss? Are you comparing a 3 blade to a 4 blade using a 2.68 or are you comparing different ratios to a 2.68? Trying to understand what you are asking.
by CarMotorBarge
Mon Aug 26, 2019 10:43 am
Forum: Airboat Talk
Topic: Asking for opinions here
Replies: 20
Views: 4216

Re: Asking for opinions here

How many RPMs do you plan to run at WOT? This answer will help determine the gear ratio. Also a 4 blade is a better pusher prop than a 3 blade if you have the HSP to turn it.
by CarMotorBarge
Mon Jul 15, 2019 6:42 am
Forum: Other Important News
Topic: Storm Area 51
Replies: 10
Views: 5173

Re: Storm Area 51

That 540 must be making some HSP to turn a prop that big. :stirpot:
by CarMotorBarge
Sun Jun 30, 2019 9:41 am
Forum: Automotive Power Only
Topic: LOW TORQUE LS Engine Build
Replies: 51
Views: 11144

Re: LOW TORQUE LS Engine Build

Been busy lately with work. Getting back to this thread. So I don't plan to spin 8000 RPMs. The max will be 7000 RPMs. Hopefully I will get a little more longevity out of this motor. :shock: The interesting thing is the LS7 comes from the factory with a 7000 RPM rev limit. The LS2 from the factory h...

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