XXO/BVGC '38 Chevy Coupe Build

[WOODY@DDLLC]

Oh, Woody- I use Duct tape, not Duck tape- I hear it's good for at least 50 MPH more!

Buddy, that's why you need the hot rod Duck tape with flames! 

[JonAmo]

The reason Jon is asking for HP because the more horsepower you put through the belt the more tension you need. I've used a free Gates program called DesignIQ for figuring out belt lengths and such, they have more complicated free programs for also figuring out required tension and resultant belt stretch that you might want to look into too. It sounds like you already have a good resource for information but I thought I'd let you know.

A while back I asked RCD how they do it and they said they just tighten the hell out of it… Helpful, very helpfull

This is where I say GH and yourself could be correct and may work but not what I would want for consistancy and optimal belt setup for longevity, heat and other issues associated with improper tension on belt. Here is theory - that your version of loose and my version of loose are not the same. You pushing for 1/4" travel is not the same as me pushing for the same distance. What you want is consistancy and a procedure that is repeatable each and every time, no matter who is doing the adjusting. And you do this with frequency... More to come on that later.

Jon

[JonAmo]

How much power does it take to drive your blower. I have no idea! It's a teflon stripped, race prepped 6-71. I may be able to get you a better answer after the dyno,but then again-maybe not!

Thanks for looking at this, and offering your expert opinion!


Oh, Woody- I use Duct tape, not Duck tape- I hear it's good for at least 50 MPH more!

I think the manufacture may be able to give you these numbers, or at least a generalized number.

Jon

[jl222]

The reason Jon is asking for HP because the more horsepower you put through the belt the more tension you need. I've used a free Gates program called DesignIQ for figuring out belt lengths and such, they have more complicated free programs for also figuring out required tension and resultant belt stretch that you might want to look into too. It sounds like you already have a good resource for information but I thought I'd let you know.

A while back I asked RCD how they do it and they said they just tighten the hell out of it… Helpful, very helpfull

  While making over 2300 rear wheel hp on chassis dyno with the 222 car, the video showed the blower belt pulling away
from top pulley. At the time we were tightning it by pulling and pushing on ''toothed'' idler pulley to get it as tight as possible.
 We now slide jack under car, stand a long socket extension on jack,position under nut and tighten the hell out of belt.
  Actually when suspension starts to lift we tighten.

  This works for us on our centrifugal blower maybe to much leverage for you guys.
  Get the same blower belt construction type [8 mm though] as top fuel and blown alcohol, ''purple inside'' last year, maybe different now.

                 JL222

[Milwaukee Midget]

Woo-hoo!!!

We're going to be on the 2012 Salt Talks tee shirt-looks like I paid our way to infamy!

This is getting ridiculous.  Yeah, I'm an MG kind of a guy, and my American alliances lie with Mopar and Ford, but Bill Reilly swagged me an AWESOME T-shirt with his kickazz Camaro on it, I'm following the Langlo build, and now I'll be buying ANOTHER T with a Chevy on it - albeit the most unusual Chevy on earth - I'm beginning to think that the Mayan's might be right!

 

[Jack Gifford]

" ... tighten the hell out of it..."

I suspect this directive ought to be qualified by "if you make upwards of 2,200 RWHP". However dazzling the flat-Cad will perform, I assume it won't be in that range. My hemi V8 (370 c.i., alky) makes about 900 HP (crank) at 12 - 13 PSI boost (small-bore 6-71, no Teflon), and my target for belt "tension" was zero at elevated temperature (such as a pull-off run closely following a full-pull). The engine being all-aluminum (and no coolant) resulted in the belt (3", 1/2" pitch) having significant negative-tension when at ambient temperature. I had no belt problems in eleven seasons of competition (up to 9,000 RPM).

So... somewhere between these two extremes is where I figure you need to be!

[Tman]

More fuel for the fire. remember, the Surfers DID NOT use a tensioner, they put the belt on and "pried the rear of the blower down to tension it. Sometimes we think too hard about this shit.

[DND]

Those Surfers were crafty guys as one nite at Long Beach they needed to put in a set of fresh bearings, drain oil - set car on side - pan off - install bearings - pan on - set car back on wheels - add oil and fuel and kick some more butt!!

By setting the car on its side setting on the rear wheels, they would not get their nice white T shirts oil stained by laying under that oil dripper as they always were clean & crafty guys!!

We could believe our eyes seeing that car setting that as that was a first.

Don

[dw230]

Pontiac Jack and Jack Gifford are the same guy?

DW

[Tman]

Pontiac Jack and Jack Gifford are the same guy?

DW

Yes Dan, please try and stay on the same lap

[dw230]

Why two different identities? What is trying to hide, Stan?

We need a conspiracy thread.

DW

[Seldom Seen Slim]

Great idea, Dan.  But before it gets out of hand, Jack asked permission for the name change - didn't just up and do it without at least "warning" me.  HJe said something about "witless protection policy" (my typo).  You're welcome to ask him if you're interested in why he changed.

About that conspiracy topic -- I think not.  We don't need to give Mr. Propster any more invitation to try and confuse us with his stuff.

[Tman]

Why two different identities? What is trying to hide, Stan?

We need a conspiracy thread.

DW

Breitbart was asassinated. Hows that?

[jl222]

More fuel for the fire. remember, the Surfers DID NOT use a tensioner, they put the belt on and "pried the rear of the blower down to tension it. Sometimes we think too hard about this Subaru.

  Thats how my twin brother and I did it in 1956 for our A blown street roadster, didn't have tensioners in those days and you could't buy toothed belt race set ups.Mosr racers used chains in those days. Bob Joenck had a machinest adapt Gillmer pulleys to our big sized S.C.O.T. blower for our olds engine.

  NO idler pully so we used a wood block between blower and manifold. Worked good.

  Don't remember having much trouble with the Gillmer belts.

                   

               JL222

[38flattie]

Jl222- that sounds like fun..or not!

Ok, guys question here:

Should I run the exhaust out the back of the car, or exit it out in front of the doors, angled towards the rear, and let it 'flow' down the sides of the car? What is going to be most beneficial for me?