Removal of 496HO restriction plates
01-02-2006, 11:11 PM
#81
Re: Removal of 496HO restriction plates
Originally Posted by articfriends
Raylar posted on this a few days ago where someone was questioning after market ex manifolds for the 496. He said it was good for 15 hp during dyno testing and it was part of his upgrade. The manifolds that give a 40 hp increase are being compared to stock restricted exhaust,if you compare it to one with restricters removed then it would only be a 25 hp gain which sounds believable,Smitty
01-03-2006, 01:17 AM
#82
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Re: Removal of 496HO restriction plates
Originally Posted by TRICK
OOPS......Some bad math there.
The Dyno sheets on the CMI Exhaust show's 55.2 hp increase over stock. Not the 40 you stated in your post.
So using your scenario, that would be a 40 horse difference. Not the 25 you post.
Just a small clarification to avoid confusion.
The Dyno sheets on the CMI Exhaust show's 55.2 hp increase over stock. Not the 40 you stated in your post.
So using your scenario, that would be a 40 horse difference. Not the 25 you post.
Just a small clarification to avoid confusion.
03-12-2006, 11:55 AM
#83
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Re: Removal of 496HO restriction plates
03-12-2006, 12:17 PM
#84
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Re: Rework of Merc 496 manifolds!!
We kind of decided to go ahead and offer a fix for the Merc 496 manifolds that some not so deep pocket boaters can afford. We have done a lot of flow bench work on the Merc 496 stock aluminum manifolds on our heads and we have developed a CNC program where we can run existing manifolds thru our 5-axis CNC machine and add some pretty nice cfm flow enhancements. This should also be very helpful to the guys worried about warranties and those adding superchargers and other power upgrades. We will be offering these reworked manifolds on an exchange basis at a very affordable cost. I will post the actual pricing very soon. Any body who has some stock manifolds around email sales @ raylarengine.com and we will most likely be buying up a few sets to get ahead of the demand. Again, Raylar tries to meet the simple needs of 496 owners without "deep-pockets"!!
Regards,
Ray @ Raylar
Regards,
Ray @ Raylar
03-12-2006, 02:57 PM
#85
Re: Rework of Merc 496 manifolds!!
Originally Posted by Raylar
We kind of decided to go ahead and offer a fix for the Merc 496 manifolds that some not so deep pocket boaters can afford. We have done a lot of flow bench work on the Merc 496 stock aluminum manifolds on our heads and we have developed a CNC program where we can run existing manifolds thru our 5-axis CNC machine and add some pretty nice cfm flow enhancements. This should also be very helpful to the guys worried about warranties and those adding superchargers and other power upgrades. We will be offering these reworked manifolds on an exchange basis at a very affordable cost. I will post the actual pricing very soon. Any body who has some stock manifolds around email sales @ raylarengine.com and we will most likely be buying up a few sets to get ahead of the demand. Again, Raylar tries to meet the simple needs of 496 owners without "deep-pockets"!!
Regards,
Ray @ Raylar
Regards,
Ray @ Raylar
Also how much for the exchange on a set?
03-12-2006, 03:03 PM
#86
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Re: Rework of Merc 496 manifolds!!
Originally Posted by Raylar
We kind of decided to go ahead and offer a fix for the Merc 496 manifolds that some not so deep pocket boaters can afford. We have done a lot of flow bench work on the Merc 496 stock aluminum manifolds on our heads and we have developed a CNC program where we can run existing manifolds thru our 5-axis CNC machine and add some pretty nice cfm flow enhancements. This should also be very helpful to the guys worried about warranties and those adding superchargers and other power upgrades. We will be offering these reworked manifolds on an exchange basis at a very affordable cost. I will post the actual pricing very soon. Any body who has some stock manifolds around email sales @ raylarengine.com and we will most likely be buying up a few sets to get ahead of the demand. Again, Raylar tries to meet the simple needs of 496 owners without "deep-pockets"!!
Regards,
Ray @ Raylar
Regards,
Ray @ Raylar
Sounds like an interesting proposition. How are you doing the porting??? Extrone Honing would probably work well. Please keep us posted summer is almost here, that would be nice to get done before the season. Best part is it will be a simple swap over, no parts relocation...
03-12-2006, 05:23 PM
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Re: Removal of 496HO restriction plates
The porting and recontouring is done by 5-axis CNC maching as I previously mentioned. Extrude hone can not properly open the port at just ideal locations and unless you've priced it lately it's way to "Damn Expensive". You guys really like to come up with ways that waste money don't you? Yes these manifolds will be ready for interested parties in April.
Ray @ Raylar
Ray @ Raylar
Last edited by Raylar; 03-12-2006 at 05:27 PM. Reason: 496 manifold improvements
03-12-2006, 06:24 PM
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Re: Removal of 496HO restriction plates
Ray,any idea of HP gains and cost of rework to the exhaust for those of us who would like to wait until April for your product. Also would a ECM reprogram be a good addition to the header rework?
Thanks, Tony
Thanks, Tony
03-13-2006, 02:51 PM
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Re: Removal of 496HO restriction plates
Nice Ray! Keep it coming. Also congrats on the Powerboat Magazine article on your new 700hp N/A beast. Did GM design a whole new block for you or just overbore the block for you?
