Search found 106 matches

by mcm4
Fri Feb 08, 2013 12:17 am
Forum: Automotive Power Only
Topic: update: crowbar engine rebuild
Replies: 49
Views: 4559

Re: Help needed with BBC Engine

Waterthunder wrote: Work with your engine builder they want to improve the way your engine runs they seam like some good guy's I spoke with them on the phone a bit today. They are going to make some cylinder head, intake and cam changes you should be pleased with the results. I have no problem helpi...
by mcm4
Thu Feb 07, 2013 5:24 pm
Forum: Automotive Power Only
Topic: update: crowbar engine rebuild
Replies: 49
Views: 4559

Re: Help needed with BBC Engine

UPDATE: I removed the ProComp single plane intake with rectangular ports and replaced it with the Chevy ZZ Performance dual plane non airgap intake (supposedly the same as the Edelbrock Performer RPM) with oval ports. The rpm increased from 4600-4650 to 5000 rpm. This at least showed that the single...
by mcm4
Wed Feb 06, 2013 7:20 pm
Forum: Automotive Power Only
Topic: update: crowbar engine rebuild
Replies: 49
Views: 4559

Re: Help needed with BBC Engine

update on what engine builder suggests for a cam and said after the mods the compression would be 10.8:1 Howard cam Cam part number 120266-12 Cam and Lifter Set Part no. 2600-6500 Duration Intake 290 Duration Exhaust 296 Duration at .050" intake 237 exhaust 243 Valve w/1.70 intake .635 Lift Rockers ...
by mcm4
Wed Feb 06, 2013 6:49 pm
Forum: Airboat Tech
Topic: headder style
Replies: 18
Views: 1544

Re: headder style

I just purchased a set from a supplier in Florida, I think the one listed on this site. He told me that he sells a huge percent of all of them sold. He said that if you want stainless you have to use 2" as they don't make 2 1/4" stainless tubing. Just a fyi...
by mcm4
Tue Feb 05, 2013 9:32 pm
Forum: Automotive Power Only
Topic: update: crowbar engine rebuild
Replies: 49
Views: 4559

update: crowbar engine rebuild

I purchased a BBC 555 Dart engine detuned with a different cam and with a hydraulic roller cam. It was suppose to produce 650 hp with a fairly flat torque curve from 3000 to 5200 rpm To go with it, I purchased a four blade 86” R style blade to go with this setup. I had heard that a 625 hp airboat mo...
by mcm4
Mon Jan 14, 2013 12:49 am
Forum: Automotive Power Only
Topic: Ox Drives-drive unit
Replies: 97
Views: 14588

Re: Ox Drives-drive unit

I would buy the 2.69 unit if he would design and guarantee an electric switch to engage the clutch from either the seat or the front steer where both could be used. foot pedal is ok for the seat but motorcycle handle would be a pain on front steer
by mcm4
Sat Jan 12, 2013 7:19 pm
Forum: Prop Talk
Topic: Prop options for bowfishing
Replies: 7
Views: 1101

Re: Prop options for bowfishing

Does anyone have experience with the sensenich saber blades. The product spec says that the blades could not exceed 3000 rpms, my Duramax does not exceed 3000 rpms, shouldn't I be able to run the blades with no reduction needed? I could vary the number of blades and length of the blades to achieve t...
by mcm4
Sat Jan 12, 2013 3:53 pm
Forum: Prop Talk
Topic: Prop options for bowfishing
Replies: 7
Views: 1101

Prop options for bowfishing

I am running a 2.3 belt reduction on a three blade super wide WW prop. At 700-800 rpm and the props set at 25 degrees the speed of my boat is quite a bit fast, at 22.5 degrees it is just a little to fast. I just blew up my motor and am looking for other options. I like the Duramax option but I would...
by mcm4
Fri Jan 11, 2013 11:32 am
Forum: Airboat Tech
Topic: hook in bottom of boat
Replies: 10
Views: 1001

Re: hook in bottom of boat

Is there another way, getting my engine and prop etc. off is a pain in the rear.

And my uhmw hides any small hooks I am assuming
by mcm4
Fri Jan 11, 2013 10:55 am
Forum: Airboat Tech
Topic: hook in bottom of boat
Replies: 10
Views: 1001

hook in bottom of boat

I have a 8x20 Silver Dollar with the trim tab beaten as high as I dare and the nose is still heavy in the water at cruise.

Is there some type of guide for dummies that can step by step help me identify where the hook or hooks are?
by mcm4
Fri Jan 11, 2013 10:51 am
Forum: Texas Airboaters
Topic: Hook in bottom of boat
Replies: 4
Views: 924

Hook in bottom of boat

I have a 8x20 Silver Dollar airboat that must have a hook in the bottom. I have the back trim tab trimmed as far up as I dare.

Is there anyone in Texas that can help me find and repair, or find and tell me how to repair the hook?

Thanks, mark
by mcm4
Sun Jan 06, 2013 11:27 pm
Forum: Prop Talk
Topic: ANYONE WANNA TRY A 81" 3BLD WHISPERTIP EX
Replies: 3
Views: 1009

Re: ANYONE WANNA TRY A 81" 3BLD WHISPERTIP EX

Do you have a belt drive or direct drive?

Do the blades turn counter rotating?
by mcm4
Fri Jan 04, 2013 10:34 pm
Forum: Prop Talk
Topic: Need hub, blade and speed reducer
Replies: 6
Views: 650

Re: Need hub, blade and speed reducer

Thanks, I have talked to Patti and Jim at WW and to Century as well. Century said there was no way to modify what I have, only choice is to purchase new at 3100 plus packaging and freight. I can buy a new four blade 12" wide that Patti said was a better option for my motor and using my current drive...
by mcm4
Fri Jan 04, 2013 1:04 pm
Forum: Prop Talk
Topic: Need hub, blade and speed reducer
Replies: 6
Views: 650

Need hub, blade and speed reducer

I have a Whirlwind AB300 with 3 - 80 inch diameter, 14.5 inches wide, Tip width 8 3/4, Whirlwind Master Blaster Blades that turn counter clockwise. I am looking for a used AB400 hub and one extra blade, or a complete 4 blade hub and blade setup that is similar. I have a Century Air Boat Drive Unit o...
by mcm4
Wed Jan 02, 2013 11:56 pm
Forum: Airboat Tech
Topic: Rigging question
Replies: 12
Views: 907

Re: Rigging question

I didn't think of that. I assume that there would be torque when I am going from zero miles per hour until I get up on plane that would require some rudder to correct but I assume that if it is rigged right that the stick would be about neutral on pressure when I am up on plane.... The problem is th...
by mcm4
Wed Jan 02, 2013 9:56 pm
Forum: Airboat Tech
Topic: Rigging question
Replies: 12
Views: 907

Re: Rigging question

Thanks, I have changed my profile to include my city, Bryan, Texas. The power pole base is not in the water, but the top part of it is sticking up over on the right side in the flow of air that comes off the prop. Maybe I just imagine that it is part of the problem. I purchased the boat and started ...
by mcm4
Tue Jan 01, 2013 8:08 pm
Forum: Airboat Tech
Topic: Rigging question
Replies: 12
Views: 907

Re: Rigging question

Thanks, I have never been accused of being too patient or too slow... I tend to apply if one is good two is better and three is best. At cruise I have to exert quite a bit of forward (I think) pressure on the stick. Riding the rudder works but is hard on my arm and reduces efficiency, what is the tr...
by mcm4
Tue Jan 01, 2013 7:47 pm
Forum: Airboat Tech
Topic: Rigging question
Replies: 12
Views: 907

Rigging question

I have very limited experience with airboats to start with. I purchased an 8x20 SilverDollar that has had a deck and lights added to the front. To me, it seemed to run a little nose heavy/flat when on plane. Since purchase I have added a bunch more light weight, two fairly heavy bow/storage boxes (1...
by mcm4
Tue Dec 11, 2012 10:09 am
Forum: Prop Talk
Topic: questions on prop and performance
Replies: 5
Views: 1050

Re: questions on prop and performance

Thanks, the two settings were 25 degrees and 20 degrees. It is the Whisper Tip sw80.
by mcm4
Fri Dec 07, 2012 7:16 pm
Forum: Prop Talk
Topic: questions on prop and performance
Replies: 5
Views: 1050

Re: questions on prop and performance

It is a Whisper Tip and the compression is good all around.
by mcm4
Fri Dec 07, 2012 6:36 pm
Forum: Prop Talk
Topic: questions on prop and performance
Replies: 5
Views: 1050

questions on prop and performance

I have a 2002 Silver Dollar 8x20 that weighs about 5500 pounds including the trailer. It is powered by a 502cid/502hp GM crate motor with aluminum heads, with a 850 Holley Carb, with a 2.3:1 belt reduction drive on a 82" 3 blade Whirlwind prop. It has an aluminum shooting deck up front, 150 pounds o...
by mcm4
Sat Sep 29, 2012 10:42 am
Forum: Hunting & Fishing
Topic: Tikka T3 lite
Replies: 46
Views: 2848

Re: Tikka T3 lite

As long as the shot placement is right a 25-06 is great. However, I prefer having a rifle that will punch a hole though the deer leaving you a blood trail to follow even with shots that are not placed exactly right. I hate losing animals and tracking them all night.
by mcm4
Sun Sep 09, 2012 3:12 pm
Forum: Automotive Power Only
Topic: Overheating issue with 502 crate engine
Replies: 16
Views: 2516

Re: Overheating issue with 502 crate engine

UPDATE:

Problem solved, thank you for all the helpful advice.

Moved radiator to 4.5" from prop, removed bbq grill, fixed timing per recommendations, now runs 150 to 170 depending on outside temp...
by mcm4
Sun Sep 02, 2012 12:20 pm
Forum: Automotive Power Only
Topic: Overheating issue with 502 crate engine
Replies: 16
Views: 2516

Re: Overheating issue with 502 crate engine

I took fannman and rbjscott's advice and ripped off the bbq pit grill (with my trusty barbed wire fence tool) and reran my test, at 12 minutes my max temp was 175F (the day was 10 degrees to 15 degrees cooler but the test was at least 20 degrees cooler) and at idle it went up to 185F. On monday I pl...
by mcm4
Fri Aug 31, 2012 6:00 pm
Forum: Automotive Power Only
Topic: Overheating issue with 502 crate engine
Replies: 16
Views: 2516

Re: Overheating issue with 502 crate engine

The temperature is being measured on the intake manifold to the left and right of where the thermostat housing on the motor is.

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