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#1
07-27-2023, 08:14 AM
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Here ya go.
Since the other thread got "canned" for some of us not behaving nicely I put up a link here where I'm NOT part of the equation. I did add some comments to help out the guy working on it, but he's not having much success despite his best efforts and putting better parts in it.
https://cliffshighperformance.com/si....html#msg22733
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
| The Following 2 Users Say Thank You to Cliff R For This Useful Post: | ||
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#2
07-27-2023, 08:33 AM
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9.0:1 and cammed huh. Not just carb problem, moreso a compression and cam problem.
For 9.0:1 and cammed 455+060, 4 of my rebuilt Q-JETs all stumbled. Whereas the 1050 Holley (with 98 or 104 Jets? Forget) could muster smooth and strong response. Probably Compensated by dumping fuel. I worked hard to get 9.0:1 to play like a high compr engine in the 1/4 mile, but doesn't mean i understood how. So the fella had a working carb that also could dump fuel, whereas the other carb didn't.
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95 Towncar that needs more TQ. Sold 2023: 12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct |
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#3
07-27-2023, 09:05 AM
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Correct, far from an "ideal" set-up and cam choice for the compression and CID, however he added this:
"This thing does NOT run perfectly at WOT. It "breaks up" and surges a bit. I can bolt on one of my "loaner" 800cfm carbs which pulls very hard at WOT and runs flawlessly at idle and part-throttle." I actually talked to him by phone and it's a mystery at the moment, but for sure there isn't a better factory Q-jet out there for high performance work than the 17057274 Pontiac unit. It's the "hack" job it went thru that's causing the issues, been there and done that more times than I can count........
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
| The Following 3 Users Say Thank You to Cliff R For This Useful Post: | ||
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