Search found 911 matches

by Striker543
Thu Oct 01, 2020 10:53 am
Forum: Automotive Power Only
Topic: Hulls for c/m(caddy)
Replies: 16
Views: 773

Re: Hulls for c/m(caddy)

https://www.facebook.com/marketplace/item/624652651558927/ What do y’all think? Too top heavy.... easy to sink? That’s what I’m thinking but also for $1500 😳 it would just be a beer boat at that point probably If I’m seeing the same thing you are, that’s a 12ft boat with low sides. No way I would p...
by Striker543
Sun Sep 27, 2020 9:22 am
Forum: Prop Talk
Topic: Powering oil tanker with airprops (is it possible)?
Replies: 17
Views: 902

Re: Powering oil tanker with airprops (is it possible)?

I’m no engineer, but I don’t think this is practical for many reasons. A few are: 1) yes it will be quieter underwater, but the noise to power a tanker with air props will be unbearably loud above water; 2) you will lose reverse, which ships need; 3) it is probably a lot more expensive in fuel since...
by Striker543
Sun Sep 27, 2020 9:16 am
Forum: Automotive Power Only
Topic: Hulls for c/m(caddy)
Replies: 16
Views: 773

Re: Hulls for c/m(caddy)

It really depends on what you want to do with the boat and what your experience level is. Smaller and lighter is going to run better and should be decent on dry ground if you set it up right, but requires more experience and is not as safe of a boat in deep water. On the other hand, a bigger hull wi...
by Striker543
Thu Sep 24, 2020 2:31 pm
Forum: Automotive Power Only
Topic: Comfy cruising RPM on a SBC
Replies: 10
Views: 650

Re: Comfy cruising RPM on a SBC

For what it’s worth when I bought my boat it had a 2.38 Gear and 3 blade 78” NGH. With that setup it cruiser closer to 4000 rpms. I changed it to a 2.68, added one blade to the prop and turned it into a 4 blade 80”. That made a big difference in overall push and also brought my cruise rpms down.
by Striker543
Mon Sep 21, 2020 10:51 am
Forum: Automotive Power Only
Topic: Comfy cruising RPM on a SBC
Replies: 10
Views: 650

Re: Comfy cruising RPM on a SBC

Mine cruises between 3200-3600 depending on conditions with max rpms at 5200. Not much you can do to lower cruise rpms other than adding more pitch, which will also reduce your overall rpms.
by Striker543
Mon Aug 17, 2020 10:53 am
Forum: Aircraft Power Only
Topic: Lycoming 320 power and prop
Replies: 39
Views: 1794

Re: Lycoming 320 power and prop

I don’t think you can buy a better prop for that engine than a sensenich NGQ. More expensive but it would be worth it to me. Also don’t put that other wood prop on and spin it over 3000. That can cause it to blow up and when wood props blow up they do a ton of damage to the boat and potentially to p...
by Striker543
Wed Aug 12, 2020 1:26 pm
Forum: Prop Talk
Topic: Airboat Prop
Replies: 5
Views: 758

Re: Airboat Prop

I would find a used 68” or 70” composite prop rather than buying a new wood prop - you will get more for your money. Also chances are your engine is not making 260hp at 3,000rpms, which is the max rpms you should turn a prop (I am assuming you are direct drive based on the prop you currently run).
by Striker543
Thu Jul 23, 2020 10:28 am
Forum: Prop Talk
Topic: 305 dd on 12ft Apache hull
Replies: 4
Views: 493

Re: 305 dd on 12ft Apache hull

That engine is not making much power in direct drive and that is too much prop. I think 68-70” two blade would be much better. Even with the right prop though that is still likely going to be an underpowered setup.
by Striker543
Mon Jul 20, 2020 10:48 am
Forum: Automotive Power Only
Topic: Is this from detonation?
Replies: 19
Views: 2165

Re: Is this from detonation?

I think it depends what the total timing was with max mechanical. There are lots of folks who lock distributors at max timing on DD engines and do not blow holes in pistons. Unless you confirm that the total timing was too advanced (probably over 34*), I would be looking for other causes.
by Striker543
Wed Jul 15, 2020 11:12 am
Forum: Automotive Power Only
Topic: Is this from detonation?
Replies: 19
Views: 2165

Re: Is this from detonation?

Also check for vacuum leaks. I blew a hole in a direct drive Cadillac engine due to a missing plug on the carb.
by Striker543
Sat Jul 04, 2020 8:18 am
Forum: Automotive Power Only
Topic: Need 500 piston
Replies: 46
Views: 4590

Re: Need 500 piston

Buddy branch recommend an edelbrock thunder series carb that he tweaked for me when I was still running a caddy. It was very affordable even with the conversion plates and Buddy tweaking it. If I was still running a caddy, I’d be using that edelbrock over quadrajet. As to the fuel issue, you can get...
by Striker543
Sat Jun 27, 2020 6:22 pm
Forum: Airboat Talk
Topic: 6.2 ls engine options
Replies: 16
Views: 2454

Re: 6.2 ls engine options

I’ve never run an airboat in Alaska so I don’t know how difficult the ground there is to run, but what I do know is not all dry ground is the same, and you can take a boat that will run 30mph in a pasture and get it stuck in short green grass that doesn’t look bad. My personal boat is a 14x8 weighin...
by Striker543
Mon Jun 08, 2020 10:42 am
Forum: Airboat Tech
Topic: Poly rivits.
Replies: 11
Views: 1791

Re: Poly rivits.

My fiberglass boat had it screwed in and the tips of the screw ground down so it was easier on your feet than bolts. Held up fine for the years I owned that boat
by Striker543
Mon May 04, 2020 12:01 am
Forum: Prop Talk
Topic: bulldozer prop.
Replies: 36
Views: 4008

Re: bulldozer prop.

For what it’s worth I spin a 4 blade 82” NGR at 5400rpms just under the 2 mark with a 2.68 box and a 406sbc with about 500hp. My guess is you would spin a 4 blade no problem with your current engine if you upgraded your gear box. I previously had a 2.38 box. Bottom line is I learned that pitch in t...
by Striker543
Sun May 03, 2020 9:32 am
Forum: Prop Talk
Topic: bulldozer prop.
Replies: 36
Views: 4008

Re: bulldozer prop.

For what it’s worth I spin a 4 blade 82” NGR at 5400rpms just under the 2 mark with a 2.68 box and a 406sbc with about 500hp. My guess is you would spin a 4 blade no problem with your current engine if you upgraded your gear box. I previously had a 2.38 box. Bottom line is I learned that pitch in th...
by Striker543
Thu Apr 30, 2020 10:26 am
Forum: Prop Talk
Topic: bulldozer prop.
Replies: 36
Views: 4008

Re: bulldozer prop.

My experience is 4 blade with a higher gear ratio is much better than 3 blade with less gear. Plus if you go 4 blade you can probably use the same prop when you upgrade your gearbox.
by Striker543
Tue Apr 21, 2020 11:26 am
Forum: Prop Talk
Topic: Damaged wood prop
Replies: 2
Views: 752

Re: Damaged wood prop

Hard to say with no pictures. Your best bet is to take it to a known propeller company and get their opinion. Be very careful - wood props are not as tough as carbon fiber and they can splinter and cause lots of damage when they blow up.
by Striker543
Tue Mar 24, 2020 11:20 am
Forum: Prop Talk
Topic: Need Prop Advise for SBC 383
Replies: 21
Views: 2909

Re: Need Prop Advise for SBC 383

If it were me I would put a 70” NGQ on it.
by Striker543
Fri Jan 31, 2020 10:39 am
Forum: Automotive Power Only
Topic: backfire through carb
Replies: 16
Views: 1848

Re: backfire through carb

Check your timing. I had the same issue and my timing was retarded. Soon as I added more timing the issue went away.
by Striker543
Sat Dec 28, 2019 10:37 am
Forum: Automotive Power Only
Topic: ECOTEC 2.0 LTG SWAP
Replies: 525
Views: 63306

Re: ECOTEC 2.0 LTG SWAP

My vote is to run as long of a prop as you can. If your boat has plenty of spare power you may find a shorter 4 blade feels more fun to drive, but my starting point would be the longest prop I could swing, then I’d experiment as time and money allowed
by Striker543
Wed Dec 25, 2019 10:24 am
Forum: Automotive Power Only
Topic: ECOTEC 2.0 LTG SWAP
Replies: 525
Views: 63306

Re: ECOTEC 2.0 LTG SWAP

If you do research I think you will find you mount the engine as low as possible for maximum thrust. Having the tip of the prop below the transom does not lose any measurable thrust and having the engine lower gives it a much better push point.
by Striker543
Mon Sep 23, 2019 10:02 am
Forum: Automotive Power Only
Topic: Mild 350. 2 blade vs 3 blade
Replies: 11
Views: 2397

Re: Mild 350. 2 blade vs 3 blade

How long are your JW blades? I thought that was a direct drive prop. If it’s the prop I’m thinking of then my guess is it’s both too short and too narrow for a year reducted engine.
by Striker543
Tue Sep 17, 2019 10:35 am
Forum: Prop Talk
Topic: BMW m57 engine for DD? Diesel.
Replies: 19
Views: 3425

Re: BMW m57 engine for DD? Diesel.

That’s a lot of reinventing the wheel for not much horsepower.
by Striker543
Mon Sep 16, 2019 3:40 pm
Forum: Prop Talk
Topic: Another 500 DD
Replies: 16
Views: 4107

Re: Another 500 DD

I tried a lot of props when I had my direct drive 472. It was freshmen rebuilt to basically stock except for an MTS cam. I think the 2 blade 74” ngh (not ngq) pusher the best. I ended up running a 3 blade 72” ngh because it was smoother. You’ll lose snap, but I think you’ll find your best push is wi...
by Striker543
Wed Sep 11, 2019 8:39 am
Forum: Airboat Talk
Topic: Boat run dry better with motor forward or back?
Replies: 8
Views: 2897

Re: Boat run dry better with motor forward or back?

I think what probably made it push better on the cottonmouth with the removed splash pan is the fact that (I’m guessing) your engine was mounted much lower. Generally, the lower the push point (engine mount), the better the push. There is lots of information on here about that if you search.

Go to advanced search