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Search: Posts Made By: Monaco20
Showing results 1 to 22 of 22
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Forum: General Boating Discussion
05-23-2020, 01:27 PM
Replies: 21
Views: 5,800
Posted By Smarty

I agree with the unofficial speed claims you...

I agree with the unofficial speed claims you mentioned.

Line the Cats up, American made and Victory or any other brand Noli, (he seems to have alot of knowledge on OSO about Cats in size...
Forum: General Boating Discussion
11-24-2019, 12:30 PM
Replies: 6
Views: 1,853
Posted By Griff

Keep in mind that your engine is rated at 425hp...

Keep in mind that your engine is rated at 425hp AT THE PROP. A stock 500efi is rated at 500hp at the crank and 470hp at the prop. The 530hp on the dyno may or may not have been in full marine dress....
Forum: Formula
04-04-2019, 06:35 PM
Replies: 22
Views: 10,097
Posted By badmonkey

https://cimg0.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg0.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1500x2000/487124d6_45e5_42f1_a11a_fb84f43b995d_bd8aa021e6bf063141d16a6f0d8621ef6d856e86.jpeg


Maybe this one will become a collectors...
Forum: Formula
04-01-2019, 03:58 PM
Replies: 7
Views: 1,477
Posted By TomZ

That's pretty! Definitely a nice looking set up.

That's pretty! Definitely a nice looking set up.
Forum: Formula
04-01-2019, 11:51 AM
Replies: 7
Views: 1,477
Posted By ph1971

100 hp will make a lot of difference in...

100 hp will make a lot of difference in acceleration cruise and top speed. I would guess 70 top end. You should be able to put the closed cooling system back on the 500, no? I can’t dissuade you from...
Forum: Formula
04-01-2019, 10:29 AM
Replies: 7
Views: 1,477
Posted By Baja Rooster

I’d stay with the 496 myself unless you want to...

I’d stay with the 496 myself unless you want to go big power like a 540 and new drive package, otherwise I don’t think the juice is worth the squeeze. Possibly rebuild the 496 with forged internals...
Forum: Formula
04-01-2019, 10:01 AM
Replies: 7
Views: 1,477
Posted By TomZ

I guess it all depends on cost and reliability....

I guess it all depends on cost and reliability. Your 496 runs well with little hours (it'll go 1k plus hours with general maintenance). The 500 EFI will need valve springs at 250 hours. Will also...
Forum: Formula
11-19-2018, 07:51 PM
Replies: 34
Views: 11,267
Posted By jwurl

Yes the XR drives suck power and speed. My...

Yes the XR drives suck power and speed. My original drive was a 1.65 ratio standard Bravo. Boat was running 68 mph on GPS. I blew the drive and installed a brand new 1.50 Ratio XR. Prop was then...
Forum: General Boating Discussion
11-08-2018, 06:59 AM
Replies: 37
Views: 6,487
Posted By Cary 29

I had ITS Merc XR drive and drove it like a...

I had ITS Merc XR drive and drove it like a normal high performance boat. The inner cooler and package designed for the motor that Whipple developed works as they say it will. The original setup made...
Forum: General Boating Discussion
11-07-2018, 08:11 PM
Replies: 37
Views: 6,487
Posted By apex svt

3.5#’s on the procharger kit you should be fine....

3.5#’s on the procharger kit you should be fine. Procharger tends to send a pretty rich running tune up for safety. The procharger boost does not have the quick torque like a Whipple so the drive...
Forum: General Boating Discussion
11-06-2018, 01:16 PM
Replies: 37
Views: 6,487
Posted By Keith Atlanta

496's converted to Raylar 600 packages and Dana...

496's converted to Raylar 600 packages and Dana manifolds.
Forum: General Boating Discussion
11-06-2018, 12:07 PM
Replies: 37
Views: 6,487
Posted By Griff

The visible external welds are normal on satin...

The visible external welds are normal on satin finish CMI's from what I have owned and seen.
I think CMI smooths them out on the polished versions so they become virtually invisible.
Forum: General Boating Discussion
11-06-2018, 11:29 AM
Replies: 37
Views: 6,487
Posted By BUP

not sure as I do not recall ---- Maybe when CMI...

not sure as I do not recall ---- Maybe when CMI first came out with marine headers - did they have external welds ? ?? Possible a knock off header ??. And Yes CMI did have headers like the ones...
Forum: General Boating Discussion
11-06-2018, 06:39 AM
Replies: 37
Views: 6,487
Posted By 1MOSES1

Personally I’d skip adding headers on a 496...the...

Personally I’d skip adding headers on a 496...the cons (leaking welds) far outweighs the benefits (looks and sound). Just my 0.02.
Forum: General Boating Discussion
11-06-2018, 01:24 AM
Replies: 37
Views: 6,487
Posted By Griff

Old CMI split top headers with a short homemade...

Old CMI split top headers with a short homemade welded on tail.
Forum: General Boating Discussion
11-05-2018, 11:55 PM
Replies: 37
Views: 6,487
Posted By Zach F100

I counted 44 hose clamps on this set of headers. ...

I counted 44 hose clamps on this set of headers.
There must be a better way...
Forum: General Boating Discussion
11-05-2018, 07:05 PM
Replies: 37
Views: 6,487
Posted By SB

Vortec 8100 / 8.1L / 496MAG Mercury Marine...

Vortec 8100 / 8.1L / 496MAG Mercury Marine Performance Parts Upgrade - Raylar Big Power (http://www.raylarengineering.com/mercury-marine-496-mag-performance-parts-upgrade-magazine-article.html)
Forum: General Boating Discussion
11-05-2018, 06:49 PM
Replies: 37
Views: 6,487
Posted By BUP

ZERO to 3 mph MAX gain would be a winner at best...

ZERO to 3 mph MAX gain would be a winner at best if even that ---- with the install stock app to stock app.
Forum: General Boating Discussion
11-05-2018, 11:12 AM
Replies: 37
Views: 6,487
Posted By boatfreak

I'm guessing you will get a wide range of answers...

I'm guessing you will get a wide range of answers but I put CMI sport tubes on my 496 several yrs ago when they first came out and while the looked cool and even sounded better I didn't see any...
Forum: Formula
10-31-2018, 10:59 AM
Replies: 34
Views: 11,267
Posted By oconnor marine

https://cimg1.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg1.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/2000x1124/20180909_121843_4f35dbd7e2f54cfc03f175825242d526882fc943.jpg
GPS said 67
Forum: Formula
10-14-2018, 10:57 AM
Replies: 2,602
Views: 1,421,283
Posted By nsformula

My 271

https://cimg4.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1095x815/21458280_1732418860393947_3193091439149010917_o_04dfb372419f762b57bffd172e3e3a85ce094f23.jpg
Forum: Formula
10-25-2004, 05:07 AM
Replies: 26
Views: 28,017
Posted By Goofy1103

Re: 382 or 419 formula How fast???

My 419 was build 1991 - It was a dealers boat show boat - I purchased it in 1998 and at this time it came first time into the water.
It was factory equipped with TWIN Mercruiser 465 wit Bravo 1...
Showing results 1 to 22 of 22


 
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