Search found 3417 matches

by crowhater
Mon Feb 05, 2007 11:20 am
Forum: Automotive Power Only
Topic: 2:1 vs 2.68:1 - Beating the Horse Just a Little More
Replies: 61
Views: 8383

Everyone knows I like the 2.68---and even more so with a small block. But the propeller is like asking ford or chevy questions. I have heard and driven boats with both propellers with gear reduction. The Sensenich is 50% quieter to my ears than the Whirlwind. Now that's only a few decibels, but it ...
by crowhater
Sun Feb 04, 2007 2:04 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

without out a doubt he walks the walk. You can never really tell about a person from just reading their post on a forum. We talked for close to an hour and it saved me at least a 1000.00 in labor alone. I never thought about the fact that the super wide bladed might hit my rudders, and was going to ...
by crowhater
Sun Feb 04, 2007 1:42 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

Crow---Without knowing anything about your hull and weight, no one can answer your questions. But my boat weighs about 2200 before anyone gets on it. Its 16 x 7.6 with about 6ft of running bottom i.e. in the water at the rear 3 feet. The propeller is 80 inchs---when you are comparing stories and po...
by crowhater
Fri Feb 02, 2007 10:27 pm
Forum: Automotive Power Only
Topic: CAD GUYS
Replies: 46
Views: 5678

Just remember that you ar going to build me a blower motor with a set of those heads next year. I know your dad said I do not need a blower but I want one. Don't worry I will build another boat with an 8 foot wide hull to hold this motor.
by crowhater
Fri Feb 02, 2007 10:13 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

Gents: Just my opinion, but it is based on 30 years of using these engines in an airboat. First, go with the 2.68. I ran DD, 2-1, 2.07-1, 2.37-1 and now 2.68-1. There is no comparision with a heavy boat. Second, the Edelbrock will flow to 5500 easily. Surf the Cadillacpower.com site if you don't be...
by crowhater
Fri Feb 02, 2007 5:38 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

Will they fit my long hub and what is the cost per blade on them? Also do they come in 80" ?
by crowhater
Fri Feb 02, 2007 5:04 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

Without a doubt I am changing my reduction, but I do not want to buy a new one until I know for sure what the best move is. If I go 2.68 then my 3B 80" falcons are worthless. I measured my cage last night and I have 2 3/4" of room at the closest spot in my cage from the ends of my 80"...
by crowhater
Fri Feb 02, 2007 4:57 pm
Forum: Automotive Power Only
Topic: Ratios vs RPM of engines
Replies: 52
Views: 6368

How did you figure on 15 degrees? I was told that an 1/8" was four degrees. So if you are a half inch past the mid point that would make you 8 degrees, which I thought was as far as you could go. I do not have any vibrations or other problems at all. When I set the prop I measure each blade fro...
by crowhater
Fri Feb 02, 2007 4:52 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

John, I had 4 people on my boat that can swear to you that I never went over 3000 rpm. I was just cruising down the inner coastal when the head of a valve came off and destroyed the motor in under an hour. The first motor I got from him I ran for about 30 mins and it lost oil pressure because the oi...
by crowhater
Fri Feb 02, 2007 3:50 pm
Forum: Automotive Power Only
Topic: Ratios vs RPM of engines
Replies: 52
Views: 6368

Right now my 80" falcon is set at the middle position. I can put 5 guys two dogs and 10 dozen decoys in the boat with 50 galons of fuel on mud and it will take right off. I must tell you that I have had the boat stuck and it was empty. We ran across a dry mud flat and I peeled the surface back ...
by crowhater
Fri Feb 02, 2007 3:44 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

I like to build my own motors and normaly I do but these days I do not have the time. After looking inside my motor I can say that I could not build a motor as well as Richard even if I had the parts. There is no doubt that you get what you pay for and it was money well spent.
by crowhater
Fri Feb 02, 2007 12:30 pm
Forum: Automotive Power Only
Topic: Cadillac gearbox change report
Replies: 39
Views: 5240

If you bowfish in deep water it might push you a little fast but you can always put a drift sock out to slow you down. If I really want to slow down I will lower both of my trim tabs and let them drag.
by crowhater
Fri Feb 02, 2007 12:26 pm
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

bondsman Both of us had our motors built by the same guy, I just chose to keep my torque lower. I have talked with Richard Potter many times and he said that 4900-5000 grand is it. I have all the dyno sheets on the motor and it makes peak torque at 4150 rpm with its HP peak at 4800 rpm. I going to h...
by crowhater
Fri Feb 02, 2007 12:02 pm
Forum: Automotive Power Only
Topic: Ratios vs RPM of engines
Replies: 52
Views: 6368

Re: Ratios vs RPM of engines

I'll be the first to tell you, I don't know much about the gearboxes other than I can build an engine to handle the rpms they add. One customer uses a 1.7 and a stroker engine and can pull it to 4800 with some prop, a big 80" 4 blade something, anyway, what kind of rpm can you spin with a 2.68...
by crowhater
Fri Feb 02, 2007 11:23 am
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

There is a big diffrence between our motors. I have a factory Edlbrock intake and a 540 hyd cam. This means that I am not going to pass the 5000RPM mark period. When I had Richard buld this motor I never planned on going any higher then 4400RPM So we built a high torque stroker motor. If I want to s...
by crowhater
Fri Feb 02, 2007 11:15 am
Forum: Automotive Power Only
Topic: Cadillac gearbox change report
Replies: 39
Views: 5240

I run an 18x7 with a 1.7 reduction and a 3 blade 80" falcon. When bowfishing I idle around at 600- 700 rpm and if I am dragging mud I will push it up to 1000-1100rpm. The reason I want to run a 3 blade is when my friends switched to 4 blade props they idle to fast for bowfishing. PS: I am not a...
by crowhater
Fri Feb 02, 2007 11:01 am
Forum: Automotive Power Only
Topic: Cadillac reduction questions
Replies: 71
Views: 8322

Cadillac reduction questions

Guys I am new to the forum but I am not new to airboats. I started with a DD 15� panther and Chevy small blocks, then progressed to the boat I have now. As far as motors go I have run Cadillac’s for years and swear it is the best motor I have ever seen. A couple of years ago I bought a Buddy Bra...

Go to advanced search