Hi Guys, I have found a few threads on this subject but not quite what I need yet. i understand the difference between 4-71 and 6-71 snout for a SBC. However I also see some variations in the snout length on specfic 4-71 set ups for SBC's. Given that both the Weiand and Cragar 471 to SBC intakes sit the blower case in the same position what would be the reason for the variation in length? At a pinch i am thinking perhaps long/short water pump or no water pump in drag application? I would love to see some picks of peoples set up. My concern is I have found a snout drive on a 4-71 set up but it is short ( ie when the idler arm is on it there is very little snout left showing) Of course the depth of the front case may have something to do with this as well, but most 4-71 set ups I have seen have plenty more snout showing. I dont want to purchase the 4-71 with a 6-71 snout set up for this money. Any thoughts before i pull the trigger would be most appreciated
A few variables-long or short water pump, 1,2 or 3 groove accessory pulley, 2", 3" or V belt, top pulley reversed (not ideal) and a competition style drive (no accessory pulley or water pump). I've got a fresh 4-71 and a few SBCs but no intake yet, so not much help. You could try with BDS, Dyers, etc. or better yet, mock it up with the lower hub and pulleys in place and use a straight edge with the matching top pulley to figure the top out.
Ha yeh bit hard to get to it from here. My gut tells me that this looks like a competition set up which means I would still have to space out snout pulley and ideler pulley to make it work on a street application, providing the idler arm doesn't interfere with anything in its location which must come down really close to the face of the block
First let me say that I'm no expert on the subject but I have a 471 blower on my Olds and have dealt a little with snout issues. The set up I bought came with a short Hunt snout but had a longer shaft to make the length correct for 3 grove pulleys. I ended up wiping out the bearings in the end of the snout multiple times. I called Bobby Walden at Walden's Speed Shop and gave him the measurements I needed and he sent me the right snout. Unfortunately I haven't gotten around to installing it yet. The picture below is with the Hunt snout. Not a very picture to show what you need but I can take better pictures and measurements of the new snout and post them later. http://www.waldenspeedshop.com/products.html Posted using the Full Custom H.A.M.B. App!
I just measured mine. This is what I came up with, this is a weiand 7135 intake, short water pump, single groove pulley. The top blower pulley (2" Gilmore) is reversed and there is 1/8" clearance between blower belt and acc belt. The snout housing is 7 1/16" long. This puts the rear face of the upper blower pulley 5 13/16" from the face of the front cover. The drive was made by Dyers and has several thousand trouble free miles many of which were not easy miles.
I'd consider your top pulley in a standard configuration (not reversed) with the flat part up front and it sounds like a 7" snout might be ideal for a 2" belt, single groove accessory.
BDS does sell an adpater plate to mount a 471 on a 671 intake if you decided to give up on the search for hen's teeth. Those intakes are out there though. The apdater is good because you'll want more power and the 671 is way better Good luck.
This is what I would suggest too. Way cheaper and since Steve is down under way easier to actually get his hands on.
thanks guys, yeh the adapter plate is always an option, much cheaper and easier to do but I am a sucker for the hard to find stuff, got a box of rocking horse poo sitting next to my jar of hens teeth in the garage. Back to topic, I think what I am looking at is definitely a competition set up, snout is no where near that long, so even after the package has landed I would still have to find a longer snout for the set up and at the asking price I dont think I can justify that, bummer really, but at some stage I have to be practical. Appreciate you guys going out to look for me and measure up though thats great info. Walden speed has nice cragar repop stuff (still no manifold planed yet though.
Just so we are on the same page as for the top pulley being reversed or not I'll put a picture of mine up. It seems to me this would be the best way to have it as it would put less stress on the end of the shaft. I may be wrong about this being the reversed position.
that's a nice set up. Weekend is coming up, you could have that snout fitted in a jiffy. Just looking at your pick i would have to say the snout length looks almost identical to what I have been looking at. The hunt snout looks very similar to the cragar. You obviously had to mod your tensioner pulley as well, or move it to a block mount I figure. Ive looked at waldens, nice stuff but to replace the snout and shaft would run me another $1k plus shipping over the purchase price which is just too rich for my blood at this stage. Be nice to see a side on pic of before and after you fit the snout. Ha. now you will have to fit it over the weekend cheers steve
Although you could swing it out the other way you would have to space out the idler pulley. I suppose this would be an option if you had a long water pump and or multiple pulley accessories to run. That looks nice and neat though, I am figuring its how it should be, the set up I am looking at doesn't run nearly that far out
Just to further clarify I'm running an aluminum plate mounted to an Weiand 4 barrel intake and a short water pump. There is also an aluminum spacer currently between the Hunt snout and the blower which was an attempt to solve the bearing issues but it didn't work. Posted using the Full Custom H.A.M.B. App!
Thanks! I'm hoping to get enough time to change the snout this weekend along with the intake gasket that went bad. The Walden parts really are quality stuff and Bobby was very helpful when i called to figure out what i needed. Here's a picture of the tensioner set up. Posted using the Full Custom H.A.M.B. App!
Very nice, thanks for the measures. That new snout will tidy things up nicely by the looks of it. Ive decided that although its a nice complete set up, what i am looking at isnt going to work for me without further mods and money, these photo shots and measures have pretty much confirmed what i suspected that its set up for comp use with no water pump.
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