Technical *** June 2015 Banger Meet - Cruising Time ***

The one I am using is late '80 Chevy s-10 4WD. I am using crazy daddy o's torque tube adapter.


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IMO, you want the S10 version.

 

Chevy S-10 pick ups 1986 - 1989 ish

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Craz

There is a Chevy Astro Van has a remote shifter that can be moved around to the top of the box

 

I used one from an early 90s S-10. The Shifter is further forward.

 

CDO,
just had word that El Mirage is in fact a GO this weekend!!
Two day event, expect lots of passes to be made.

Hope to see you there, J

 

Jim,
I have knowledge that they exist. I have never worked with one so I don't like to recommend things I don't have first hand knowledge of.

John,
I was planing on it, but other plans are going to keep me away from El Mo and the Antique Nats.

.

 

The Van t-5 was used in many phone co trucks and really a 49 state thing. I never saw one in Cal

Bill Mitchell (GM) told me about them

 

Hey guys. Searched around but didn't see much. I'm about to put an ansen single carb intake with A holley 94 and tube style header. What is a good jet size to start with? Carb came off of a 36 flathead V8.

It has 50's in it now

 

For sure you need to change your power valve from the stock 7.5 size to 5.5 to compensate for the weaker vacuum signal in a four cylinder as compared to the V-8 the Holley was designed for. I think you will get some off-idle bogging or stumbling with the #50 jets; they are likely to be too lean. If you have another carb or the original #51 jets try them first and you may still need to go up in size.

I'm running two 94's and found I needed bigger than stock jets in the banger.

 

My new motor at H and H Antique getting ready to head down to lil ol' New Zealand. Thomas head, burns intake and side plate, nos dual mallory, dual 81s, Scat crank and 3/4 cam..porn

 

I like the look of the black with the aluminum!

 

All else being equal, how/why will a banger have less vacuum than a V8?
Changing the powervalve will only alter the time when the enrichment tips in , not the amount of enrichment. A 5.5 will delay the tip in and possibly cause a stumble off idle.
The normal reason for going to a 5.5 is if the cam being used (overlap) produces lower idle vacuum and causes the power valve to open too early . Other things can affect idle vacuum, but they are either adjustments or repairable wear.
Another consideration is the type of carb, a 36 would have a Stromberg 97 as stock carb , if it is in fact a Holley it could be off any flathead made after 1938... with varying jetting and other specs.

 

You better double check El Mirage we had over 1/4" of rain, Phelan had almost 1/2" clouds looked pretty dark down that way.

 

It's definately a holley 94 with 50's in it. I'll put it on like it is and tune from there. Stock cam.

 

Consider it double checked.

 

well done rich Fox you are a stayer

 

Not my time slip. just proof that they were running.

 

can you reuse shims on a model B/C motor?

 

Many records fell today.
Not the best air, and I heard 4th round being called.

J

 

on the s-10 trans . mine is a late 80's- early 90's 2WD & the shifter is forward of my seat . (coupe) . good trans . but I am open drive shaft ............

 

Holley 94s power valve works off venturi vacuum not manifold vacuum
I find that the stock 7.5 power valve work fine on most strong good breathing A/B bangers I may be thinking of a different Holley played with lots over time
it is all about how much air is passing through the venturi for twin carb set up I start with 4.5 power valves

 

The power valve works from both manifold vacuum and signal from flow , but that signal is taken is well below the venturi.
The lower end of the power valve control passage is beneath the throttle plate when the throttle is closed, and therefore exposed directly to manifold vacuum, which holds the valve closed, until the vacuum drops below calibration as the throttle is opened , however as the fuel supplied from the power valve goes through the main circuit no enrichment should be delivered until the mains begin to operate. As the airflow through the carb (past the control passage) increases , signal ( not vacuum) will close the power valve, bringing the fuel supply back to the main jets alone for economy , in fact some texts refer to the valve as an economizer valve.
Original Holley 94 power valves were in fact not numbered, but Ford did supply a high altitude valve . A word of warning , most modern Holley power valves , do not work in 94s without some modification.

 

What sort of mods do u need to do to the modern power valves to make them work

 

The radius at the top of the threaded part is too large for the 94 and often stops the valve from seating properly . You can set them up n a 4 jaw chuck and machine the radius with very light cuts , it is awkward often ends in disaster. Or you can try to modify the seat in the carb , however the modern valve is also longer , and the body of some 94s is too shallow to allow the valve to operate correctly, so more machining is needed to allow working clearance for the moving part of the valve
It is a matter of very careful inspection and measurement and then deciding how you are going to go about it.
Vintage Speed lists already modified valves for $8.75,
http://www.parts123.com/parts123/Pa...HOME=www.vintagespeed.com&TITLE=VINTAGE_SPEED

Go to the Holley 94 parts section, page 11 and 12.


However I am in NZ 1000s of miles away so I do my own...

 

Thanks 97 for the info I have a new carb kit to rebuild the carb so will have to mod

 

Gents
I have an eye on a V8 3 speed for my banger, it is apparently early, will I be happy? as I will be in for about $1500 to make it happen, latter boxs are rare here in Australia.
Thanks
Brendan

 

Hi Brendan, they are around if you are lucky, I picked up a 39 + box within 10ks of home but was full of rusty water.
That case and shifter were still good and went to Outback as part of a barter deal I think some 6 months ago.

 

I think Henry's T and A parts in Victoria are still importing the Mitchell Model A box with syncro's. When I enquired a couple of years ago they were running at about $1800.


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