Built 496 w/ Weiand 525sc blower...Need advice
 

Building a 496 out of 454 block. Merlin heads, roller 612 lift cam 114 deg. Bought a blower supposedly off a 525 SC. Weiand, black case red Mercruiser SC insignia on side. I believe to be a 177, has single Dominator top. Is it gonna produce enough for this motor or do I need a 250 blower OR.......????? Help Please!

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Man, I spent 20 minutes typing you a pm, all to find out you can't recieve them. Email me at Fast9SecChevelle@aol dot com. :chimp:

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Boost Is Boost,just Depends On How Much You Need,the 177 Has To Spin Realfast To Make The Same Boost A Larger Blower Does At A Slower Speed,hence Less Heat With Bigger!then Compression Comes Into Play!

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

I would recommend a 250. The larger cu.in. the bigger the supercharger you will need to feed it. I have used and am a dealer for The Blower Shop and Whipple. A Blower Shop polished 250 kit complete would run you about $3300.00 and then I would give you an OSO discount off of that when the order is placed. The larger blower will allow you to make the boost you want with slower blower speed. This would create less heat and make more power. Your always better to go bigger on blower and drive it slower with a roots style. Thanks,

Gellner Engineering Marine Power
Dean Gellner

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

I have the 177 blowers on my motors, are the 177 & 250 blowers the same height? What horsepower would you gain going to the 250 with the same carb, 1050 Dom.

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Lynn,,, Lynn,,Lynn,,,, Leave it alone!!!!!! :D :D :evilb:

RHC

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Did you just get this from ebay yesterday?

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

No, I saw that one. Got it from a guy here in Ca that's a whole 'nuther story :(

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Ok so now I'm definately gonna buy ANOTHER Blower. The Weiand 250. If I run a single dominator 1050 on top, will that produce any less power than dual carb setup? And, if I run duals, what size guys???

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

The 177 used on the 525SC is pretty much at it's limits on the 454. The 250 is a great combo with around 500 cid.
I just did some work on a 502, intercooled, 250, with a single dominator. Fuel distribution seems to be something of an issue with the single carb. I doubt you will get a lot more hp out of the dual carb setup, but I bet it would run cleaner.

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

There's a guy with a 250 and 2 450 holleys on it. This set up seems real odd to me especially the side float carbs and that small cfm. Shouldn't one run center floats on these? 4150's?

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Gary, how lean were some of the cyliders compared to the others?

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

Center ones were very rich, especially at idle (black plugs). Lots of loading up, rpm oscillations, even with MSD.
CMC around here sets their 502/250 blower motors with twin carbs, and they have a very nice idle.
Gary

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

What carb were they running? What CFM do they run with dual setup?

Re: Built 496 w/ Weiand 525sc blower...Need advice
 

They were running Demons, 650s I think.
Try the holley wesite, they have a lot of good info, even on marine supercharger setups.
They have a tech line too. Never tried it, but it may help