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#1
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My new 7040263 Q-jet
Yesterday I got my new carb. It looks good. It's going to replace my current carb which is a likely fake 7040273 Frankenstein carb. I can't wait to get it on the car.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#2
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Very nice! What date is on it?
Dennis |
#3
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#4
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#5
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Just for S&G, 273 is a RA carb, 263 is a 350hp, both with manual transmissions
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#6
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Yeah, I know. But since there aren't many of those around, I guess I'd rather have a real 263 than an obvious fake 273.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#7
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Jhein, Thanks! Have you checked out what it has for jets & metering rods yet? My 7040270 (auto carb) had it's original 69 jet/37 rod primaries and DA (.044 M) and 'N' hanger on the secondary side. With today's fuels, it seems a tad lean, so will jet up a little bit after some more shake-out driving.
Dennis |
The Following 2 Users Say Thank You to SD455DJ For This Useful Post: | ||
#8
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incase this helps - taken from my 1970 Rochester book (secondary hanger part number translated thanks to Cliff's book):
jets / primary rods / secondary rod 7040270 = 70 / 37 / CC 7040273 = 70 / 37 / CC 7040263 = 70 / 41 / CC I believe that the '263 was a smidge leaner on the primary side because of the POE (used on all non-RA Pontiac airhorns that year) which would introduce a smidge more fuel on light or part throttle. Also incase it's helpful; 7028270 = 72 / 41 / BE 7028273 = 72 / 42 / BE 7029270 = 69 / 38 / BP 7029273 = 69 / 36 / BP
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#9
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I recall using 70 primaries in just abut everything. 37 rod will cruise richer than a 41. Was just looking for my main Rochester book, black binder withChev/Pont label. Know where within about 300 sq. ft....
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#10
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Quote:
Dennis |
#11
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@ padgett - well, now you don't need to look
@ Dennis - I would wager the metering was adjusted at some point; These carbs were setup as per application; I have heard that when these cars were new, it was common for dealerships to perform metering changes to remedy customer complaints ect - and while I don't know if there was a TSB which suggested a metering change, but that's another possibility. I so would have loved to be around when these cars were new... I'd would have probably always been broke too
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#12
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Quote:
Also, so then I can change my primary rods and get closer to the RA calibration?
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#13
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I was around when these were new and was always broke. But was a GMI student on the GI Bill, and had access to Many Things.
(Like an unchromed Buick bumper, Flint glommed onto some of my ideas). ps in front was my SCCA B/P Z06 FI split window. |
#14
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Quote:
I'll see If I can be of help.
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
The Following User Says Thank You to unruhjonny For This Useful Post: | ||
#15
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LOL - thanks for that
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
#16
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Quote:
No vacuum port for the automatic kickdown. (no throttle kickdown on automatic linkage)
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
The Following User Says Thank You to johnta1 For This Useful Post: | ||
#17
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BTW, Padgett used to have some good Qjet info on the web.
(not sure if it's still up)
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#19
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
#20
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I have Cliffs book - but on Padgett's "How to speak rochester" site he mentions Doug Roe's book. I looked it up on amazon and was surprised to see it was published on January 1, 1672! Lol! Had to share that one. Hopefully that was supposed to be 1972...
https://www.amazon.com/Rochester-Car...6366251&sr=8-3 |
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