Holley ??? CFM - Team Camaro Tech
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post #1 of 4 (permalink) Old Nov 7th, 00, 09:57 PM Thread Starter
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Join Date: Oct 2000
Location: Steel City, PA, USA
Posts: 89

How do I identify my Holley? It's a double pumper, dual line feed, mechanical secondaries, beyond that I have no clue. There has to be a way to tell what CFM it is, right? It's in my `68SS, originally a big block car, but the engine is a `70 Vette 454/390.

I just got the car 2 months ago and broke a leaf in the passenger side rear(multi-leaf), so it's down until I can pull them and send them off to National Spring for repair and rebuild. They're charging me $350 to replace the broken spring, re-fire, re-shim, replace all the bushings and paint them. Is that a good deal? or any other suggestions?

I also need to go through and do a tune up on it, since I have no idea when the last one was done, what plugs should I use in this? I am a diehard AC fan for GM engines, right now it has R45T in it. It's got the full MSD6AL ignition(dist., coil, and module), and I found one of the Taylor plug wires had backed way off the distributor cap and the wire and cap are kinda charred. Am I going to have to replace the cap, and/or wire? It was breaking up around 4,500-4,750 RPM, I suppose running on 7 cylinders will cause that, eh?!!! I thought this thing was fast, and it was only on hitting 7...SH!T.

On a side note, this is my first big-block, what is common as far as redline? It's got a 6K chip in the ignition, but I was just curious as to what the standard is...

Thanks for any and all info.


[This message has been edited by 68SS454 (edited 11-08-2000).]
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post #2 of 4 (permalink) Old Nov 8th, 00, 07:13 AM
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Mike, off the carb you find a set of numbers like " LIST ####" on the air horn. Post them here. This will ID the carb

Replace the wire or recut the end and reboot it if you have an extra boot/crimp. You might be able to reuse that one if you can get it off without torching it.

Your gonna love this rat, but make sure its sound before you put a 6500 rpm chip in there. 454 6500 rpm easy.

I find AC plugs are best.

You might want to check into aftermarket new springs for the rear. Remember, this car now has more torque than the stock application BY FAR! I'd go with beefier rear springs that are designed for 500 hp use. They are not difficult to replace in your driveway. By beefier to can go from fiberglas one leafs to multileafs. But I havent done one in a while. See whats out there before you replace.

PLUS, I would never fix only one sproing like that. You know the spring rate will change, what about the other one. Now your springs will be unblanced.

Naw, it might cost a few pennies more, but I'd get 2 fresh springs for it that are a matched pair. You'll need the best you can afford.

I find the AC plugs are the best.
post #3 of 4 (permalink) Old Nov 8th, 00, 07:59 AM Thread Starter
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Join Date: Oct 2000
Location: Steel City, PA, USA
Posts: 89

I'll check for any #'s on the carb, as for the springs, it's $350 to rebuild BOTH of them, just repair the broken one. Are they not gonna be strong enough still? Like I said, it's originally a big-block car with multi-leafs. Not a built 454, but still. Lemme know what you think, and thanks for the info.

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post #4 of 4 (permalink) Old Nov 8th, 00, 08:36 AM
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Location: Dallas, Texas
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I would just get a new pair of springs. You can buy the from Eaton, which was the original supplier to GM. The springs should be less than $350 for a new pair.

Hugger Orange & white 69 Camaro with supercharged 350, Tremec TKO, and 3.73 12-bolt

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