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Hib, Size matters The below link is from another well known copyright protected QJet author. On page 20 of his book, he provides back to back dyno runs of two popular QJet carburetors. A specially customized 850 CFM 1976 casting QJet verses a 1970 Ram Air Pontic QJet casting. While both...

Hib H, Just a quick question about the above 400 dyno post. 1. Do you know if the Holley 750 (3310-1) was dynoed on the QJet type intake with an adapter...? When compared with a specially modified 800 CFM QJet. The following link is for a copyright protected publishing. You may recognize...

Good research Tom, The 702s and 637s found their way in OTR commercial truck/tractors, buses, military, and large pumper fire trucks. These engines were popular in the agricultural sector. While burdened with large irrigation pumps, some were fueled with propane and Nat Gas and ran for...

Hib, I don't have a lot of time to provide all the ancillaries to support my above post right now. As I find time, I'll try to provide you with published technical writings, articles, service manuals, and oem sales brochures to support my earlier post. These following links provided may...

Hib, I'm basically agreeing with you on most points as well as the blanket statement that "same CFM carbs with near identical atomization characteristics will produce similar results". But as your choice and preference states "a properly modified and jetted 800CFM Quadrajet". Without...

Would not a Holley 800CFM carb be an Apples to Apples comparison...? Is not a 17056263 QJet an 800CFM model...? So with reference to your dyno run, what has been proven..? A tuned 800CFM carb can produce 10-20hp/tq than an out of the box Holley 750cfm vacuum model...? What a Juror/Jurist...

I have seen this before but usually on trucks. More specific Chevy/GMC gen1 trucks. Some heavier GMC's had beefier throw out bearing assemblys. I'm a little puzzled about your 164 tooth flywheel. I hope it's just a typo. I remember the 12.5 inch flywheel with 153 teeth and the 14 inch...

Congrats and Happy Birthday Truely a fine looking ride.:thumb We just celebrated my classics Eleventh Aniversary of her 39th Birthday. True to a classic, once warmed up she runs fine and likes to be driven hard. Great looking car.:cool!:

OMG! OMG! OMG! What What Will we do? Perhaps the General can save one For President Obama. He says he wants one but the Secret Service won't let him have one. OMG!:rotfl

Were talkin' car here right.:chuckle I like that SmokinZ signature. I have always liked anything Smokin:beer.

Welcome:beer When In doubt, Whip it out:chuckle. AGE QUOD AGIS DO what you do, Well. To all, Only the Best.

I agree and disagree. For his customers of unknown technical abilities and warranty concerns, I agree. For your owner built and driven engines, I disagree. Having said this though he has been in business a long time. I'm sure he can sort it ALL out by now. For the unknown owner and driver I...

Facraly 62, Sorry I lost focus of your question. The old oem part number for the 74 vette solenoid I believe you will find is GM part#19974117. The OEM carb numbers are 7044225 and 7044221 auto/ manual respectively. Looks like yours may be factory. Like mentioned above this carb must be...

Game on Tom. I agree. It is amazing what Shell, Mobil, Vavoline, Havoline, Pennzoil and Castrol GT knew 30 years ago. Zinc as discribed above reduces engine wear in engines. The big agruement then was between zinc additives and molybdenum disulfide additive. Proponents of each claimed...

TOO much CARB Lars is spot on.:thumb The 70 350 LT1 came factory with the 780 holley, 11-1 comp, solid cam. There are several 750 variants. Some with the dog leg boosters. Some with the annular discharge boosters. Mechanical and vacuum version are only a few. I always like the center hung...

Do you have the divorced choke style on your 74? The divorced type had a bi-metal coil some mechanics called the choke stove. This sat bolted on the exhaust heat riser that ran under the carburetor pad on the passenger side between the valve cover and intake manifold center. Other styles of...

Fecraly 62, Does your 74 have air conditioning? Does your solenoid work? Do you have a service manual for Qjet carbs? Can you verify you have the correct cfm model for your 454?

Have you verified your power valve has free movement, with the engine off? This can be done without disassembly, don't damage it. Check to make sure both squirters are squirting healthy streams. Good luck. :thumb

Are your hedman headers leaking at the heads? Recurving your distributor's mechanical advance (sooner) and limiting it to 8-9 distributor degrees may allow you to run more intial timing which tends to perk things up at lower rpms. If you're worried your mechnical advance timing (weaker...

Yes a good belated 4th back. Rememeber Nov 4th also. Traditional Constitutional Conservative? If the Articles won't allow it, strike the admendment as written.