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-   -   Any Pictures of Extension Boxs and/or Shorties (https://www.offshoreonly.com/forums/baja/241874-any-pictures-extension-boxs-shorties.html)

Irishtornado 11-08-2010 10:23 PM


Originally Posted by TW720HVY (Post 3249302)
I will also like to be kept abreast of your findings.

What was your starting point or stock prop shaft height and were is the point you are talking about the bow lift and speed? Are you saying that higher the prop the slower the speed and bow lift?

Thanks!

They're seems to be a happy spot on Baja's it's right around 4". Bajaman went a little to high with the knotched transom IMO...:party-smiley-004:

Originally Posted by jeffswav (Post 3249285)
I think you have it reversed !! :lolhit:

Nah I'm pretty sure that anyone that has ran with him will vouch his boat is setup perfect and runs likes a raped ape as he passes them...He almost handed me my ass 2yrs ago...Cost me 15k last winter to make sure it didn't happen again! :lolhit:

Baja_man 11-09-2010 07:42 AM


Originally Posted by TW720HVY (Post 3249302)
What was your starting point or stock prop shaft height

My stock prop shaft height was about 6.5". I added the Stellings box set in the middle position with a 2" Imco shortened lower unit.


Originally Posted by TW720HVY (Post 3249302)
Are you saying that higher the prop the slower the speed and bow lift?

With the current height vs stock height it did not slow the boat down any it just didn't pick up as much as anticipated.....roughly 1-2 MPH. The big thing it did do was add prop slip. It also does not respond well to trim at the moment. It will shoot a rooster tail but not raise the bow which is needed for speed. I think as I lower the prop shaft height the response to trim will come back as well as the needed bow lift and speed should follow.

kragar 11-09-2010 07:54 AM

New to the 25OL and have been reading up on the extention boxes and short drives and the MPH gains seem to be neglegable. I see most are spending $5k to do these. Why wouldn't you just bolt on a procharger for $5-6k and get the big gain of MPH. Sorry to get off topic, just trying to understand the reason to look at the boxes and such.

Baja_man 11-09-2010 09:02 AM


Originally Posted by kragar (Post 3249598)
Why wouldn't you just bolt on a procharger for $5-6k and get the big gain of MPH.

I dont have any experience with prochargers but I do know there is more to it than just adding a procharger. The 496 platform is not a good candidate for this. The internals are not meant to handle it. If one were to take the time to have a 454 or 502 setup for a procharger with low boost, than yes, the gains would be great. But if you were to just put a procharger on a 496 and expect it to be turn key, it will get very expensive.

There is no easy inexpensive way of adding MPH. It all has a price whether in actual cost or reliability. Some have the deep pockets to add all at once and others do upgrades in stages. One of the benefits of a box and lower is better rough water handeling. It makes it a safer platform for big power upgrades whether by cubic inches or procharger because of the hydraulic steering that must be added with an extension box.

Another thread with some interesting info and real world experience with a 25 OL extension box and shorty...
http://www.teambajamarine.com/forum/...ad.php?t=13884

Ebay Ed 11-09-2010 09:47 AM


Originally Posted by Baja_man (Post 3249652)
Another thread with some interesting info and real world experience with a 25 OL extension box and shorty...
http://www.teambajamarine.com/forum/...ad.php?t=13884

probably wont get many from here to go to " that " website to read anything

Irishtornado 11-09-2010 10:13 AM

Not only does the box increase safer future mods it allows the center of gravity to change based on moving the leverage point back further in the boat also.

Irishtornado 11-09-2010 10:16 AM


Originally Posted by JaayTeee (Post 3249166)
+1;)

He impresses me everytime I run with him...He's always right there...

JaayTeee 11-09-2010 10:24 AM


Originally Posted by kragar (Post 3249598)
New to the 25OL and have been reading up on the extention boxes and short drives and the MPH gains seem to be neglegable. I see most are spending $5k to do these. Why wouldn't you just bolt on a procharger for $5-6k and get the big gain of MPH. Sorry to get off topic, just trying to understand the reason to look at the boxes and such.

As I recall from last years Hawkeye poker run,

There was a pro-charged 25 O/L there, and I'm fairly certain
Steves boat ( the boat in picture 11 in the link)
would have out ran it....and he doesnt have a bolt on hair dryer;)

RunninRed 11-09-2010 10:29 AM


Originally Posted by Irishtornado (Post 3249107)
This is the guy you want to follow...Post#11

Boat runs with twins and outrun's most singles.

http://bajaboatowners.com/threads/13...=3034#post3034


Sounds good. Anymore info on his setup?

Baja_man 11-09-2010 10:37 AM


Originally Posted by RunninRed (Post 3249728)
Sounds good. Anymore info on his setup?

496 HO, CMI headers, Stellings Box all the way up, 26P Bravo 1 prop.

His last run of the year was 70.5 GPS 1 person, light fuel.


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