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-   Sonic (https://www.offshoreonly.com/forums/sonic-46/)
-   -   496ho with a Whipple (https://www.offshoreonly.com/forums/sonic/102795-496ho-whipple.html)

Prowler 05-16-2005 05:41 PM
Re: 496ho with a Whipple
 
Brian C,i'm running stock 1.50 ratio,if you can try a merc prop 3 or 4 blade,maybe a 25 3-blade or a 26 4-blade for starter's,like i said i didn't like the way the hydro felt,dave

jlsnyder26_Sonic 05-16-2005 06:26 PM
Re: 496ho with a Whipple
 
Originally Posted by Brian C
I have a 2003 Sonic 260 with a 496ho & a Whipple Supercharger installed. Just wondering if anyone else has done this on there boat & what speeds that they are seeing. On GPS I am running 73mph. Does this seem right to you guys?
I have an '04 Prowler with a stock 500EFI, ITS and labbed Bravo 26 4 blade, and it GPS's a solid 73MPH. I've seen 76 with the right conditions. I would have expected at least 75 to 78 with that set up. If I were you I would be out trying some different props. Also, the headers wouldn't be a bad investment.
Just my 2 cents......:cool:
JL

Brian C 05-16-2005 07:25 PM
Re: 496ho with a Whipple
 
Thanks for the input guys. I'm talking to Julie at Throttle Up & we're going to try a different prop & see what happens.

Prowler 05-18-2005 12:34 PM
Re: 496ho with a Whipple
 
Brian C,did you remove the restictor plate's out of you exhaust,between the riser and the manifold,in the tech section guy's have done that and picked-up a couple of hundred rpm's.dave

Brian C 05-18-2005 01:13 PM
Re: 496ho with a Whipple
 
Yep, I sure did. It was part of what Whipple wanted done in the install. I'm thinking about going ahead & getting a set of headers for this thing. Like you say it needs to breath.

Prowler 05-18-2005 10:57 PM
Re: 496ho with a Whipple
 
Brain C,can you post a pic of your boat and engine?like to see it,dave

Brian C 05-21-2005 03:09 PM
Re: 496ho with a Whipple
 
Dave,
I'll see what I can do. When it comes to me & pics on the computer I seem to have problems.

26SONICBLASTER 06-07-2005 03:28 PM
Re: 496ho with a Whipple
 
I have a 2004 260 Prowler w/ a 496 HO also, but am getting only 62 to 63 out of her. It is running on the 4 blade 22 P that came with the boat, and wondering about recommendations to step up to a 26 p 4 blade. A buddy of mine recommended it, but wondering if anyone out there has any more recomendations for prop set up without engine modifications? She also only has 14 hrs on the motor at this time too so I am sure she is not quite fully broken in yet. Thanks, Pete :cool:

jlsnyder26_Sonic 06-07-2005 08:39 PM
Re: 496ho with a Whipple
 
Originally Posted by 26SONICBLASTER
I have a 2004 260 Prowler w/ a 496 HO also, but am getting only 62 to 63 out of her. It is running on the 4 blade 22 P that came with the boat, and wondering about recommendations to step up to a 26 p 4 blade. A buddy of mine recommended it, but wondering if anyone out there has any more recomendations for prop set up without engine modifications? She also only has 14 hrs on the motor at this time too so I am sure she is not quite fully broken in yet. Thanks, Pete :cool:
What kind of RPMs are you turning??? I wouldn't recommend that kind of jump. I can barely turn my non-labbed 26 with any kind of load (4 people, full tank of gas, and water) with a 500EFI. About 46 to 4800 if I remember correctly. :rolleyes: My labbed 26 turns about 49 to 5000 in the dead of summer.

26SONICBLASTER 06-08-2005 08:39 AM
Re: 496ho with a Whipple
 
jlsnyder26_Sonic,

I'm turning about 4900 rpm with the 22p 4 blade on my 26 Prowler. Thanks, Pete


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