302 SBF stumble
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Re: 302 SBF stumble
Here's a snip from http://www.thecarsource.com re the 1969 factory Trans Am Mustang:
"The Trans-Am engines were provided by Ford's Engine and Foundry group. They were blue printed and balanced, race ready when shipped to Shelby Racing and Bud Moore. Every racing part was heavy duty to stand the rigors of the upcoming season. In the beginning a Cross Boss intake manifold was planned, similar to Chevy's Cross Ram intake. It had two huge 1250 cfm Holley carbs mounted in the front and rear on opposite sides..."
"The Trans-Am engines were provided by Ford's Engine and Foundry group. They were blue printed and balanced, race ready when shipped to Shelby Racing and Bud Moore. Every racing part was heavy duty to stand the rigors of the upcoming season. In the beginning a Cross Boss intake manifold was planned, similar to Chevy's Cross Ram intake. It had two huge 1250 cfm Holley carbs mounted in the front and rear on opposite sides..."
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
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Re: 302 SBF stumble
Yep it would have been faster with a 350 Holley!MadBill wrote: ↑Sun Jun 24, 2018 9:19 pm Here's a snip from http://www.thecarsource.com re the 1969 factory Trans Am Mustang:
"The Trans-Am engines were provided by Ford's Engine and Foundry group. They were blue printed and balanced, race ready when shipped to Shelby Racing and Bud Moore. Every racing part was heavy duty to stand the rigors of the upcoming season. In the beginning a Cross Boss intake manifold was planned, similar to Chevy's Cross Ram intake. It had two huge 1250 cfm Holley carbs mounted in the front and rear on opposite sides..."
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Re: 302 SBF stumble
Carter 2 bbl, better air speed!af2 wrote: ↑Sun Jun 24, 2018 10:12 pmYep it would have been faster with a 350 Holley!MadBill wrote: ↑Sun Jun 24, 2018 9:19 pm Here's a snip from http://www.thecarsource.com re the 1969 factory Trans Am Mustang:
"The Trans-Am engines were provided by Ford's Engine and Foundry group. They were blue printed and balanced, race ready when shipped to Shelby Racing and Bud Moore. Every racing part was heavy duty to stand the rigors of the upcoming season. In the beginning a Cross Boss intake manifold was planned, similar to Chevy's Cross Ram intake. It had two huge 1250 cfm Holley carbs mounted in the front and rear on opposite sides..."
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Re: 302 SBF stumble
Ford didn’t use a Cross Ram manifold on the ‘69
Trans Ams . They used transverse mounted sand cast
Dominators on an IR Manifold. Supposedly peaky as hell. The Cross Boss manifold developed with the Autolite
Inline Carbs was banned by the SCCA and
The 1970 cars used the Mini-Plenum Dave B
Trans Ams . They used transverse mounted sand cast
Dominators on an IR Manifold. Supposedly peaky as hell. The Cross Boss manifold developed with the Autolite
Inline Carbs was banned by the SCCA and
The 1970 cars used the Mini-Plenum Dave B
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Re: 302 SBF stumble
Quite so; hence the quote reads '...was planned...'grandsport51 wrote: ↑Sun Jun 24, 2018 11:10 pm Ford didn’t use a Cross Ram manifold on the ‘69
Trans Ams . They used transverse mounted sand cast
Dominators on an IR Manifold. Supposedly peaky as hell.
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: 302 SBF stumble
Exactly stat, you just s**t on your own argument: the air valve don't open until the EXTRA air flow is REQUIRED. Which is why those carbs work so well & that there are QJ carbed cars running 10 secs...
Re: 302 SBF stumble
Grandsport, you are exactly right. The extended boosters give it away as the IR version, model #6214, 1150 cfm. So each cylinder of the 302 got 144 cfm.
Reading this Statsystems, 144 cfm, NOT 600+cfm.
CJ Performance [ Craig ], I don't know if it wise to continually bag Carter carbs.
Some of the fastest cars sold in Australia, & road tested by Wheels magazine & other magazines had Carter 2bbl [ & Stromberg ] 2 bbl carbs.
How does 118 mph waaaay back in 1958 for a 318 powered, 2bbl, 1958 Plymouth sound?? Or these comments from Wheels magazine staff: Road Rocket, Blistering Performance. All lavished on 318 Chrysler Poly engined cars with a 2bbl.
Reading this Statsystems, 144 cfm, NOT 600+cfm.
CJ Performance [ Craig ], I don't know if it wise to continually bag Carter carbs.
Some of the fastest cars sold in Australia, & road tested by Wheels magazine & other magazines had Carter 2bbl [ & Stromberg ] 2 bbl carbs.
How does 118 mph waaaay back in 1958 for a 318 powered, 2bbl, 1958 Plymouth sound?? Or these comments from Wheels magazine staff: Road Rocket, Blistering Performance. All lavished on 318 Chrysler Poly engined cars with a 2bbl.
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Re: 302 SBF stumble
Geoff im just having a wind up! I actually like Carter, Autolite and Stromberg carbs. Nothing wrong with them at all, single, 2 or 4bbl.
All of the mentioned carbs have their place. TQ up there with my faves.
That previously mentioned 585 holley Ford factory fit carb is a beauty.
All of the mentioned carbs have their place. TQ up there with my faves.
That previously mentioned 585 holley Ford factory fit carb is a beauty.
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Re: 302 SBF stumble
I even like SU's ! I dont often admit that !
Hitachi or CD strom are better!
Hitachi or CD strom are better!
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Re: 302 SBF stumble
No I didn't. You are mixing your definitions to fit your answer.
You actually made MY argument. By your twisted logic, if the air valve isn't open, then it's still not open! You may have opened the butterflies, but the air valve is shut. You can parse your shit argument any way you want, but it's still a sort of vacuum secondary.
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Re: 302 SBF stumble
There's probably a 'strikeout' option available on this reply box or your keyboard somewhere for highlighting changes/deletions in a text (sort of like the underline tab), which has been accidentally activated. No clue how to switch it off if there is though...
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: 302 SBF stumble
Keep going Stat, you are just showing your ignorance....
A DP works on vacuum. If you knew anything about carbs, you would know this....but you obviously don't.
There is no flow from the boosters of a DP [ or any carb for that matter ] until air speed is high enough through the venturiis to create a depression [ vacuum ] & cause fuel to flow from the boosters.
Craig, sorry if I came on a bit strong. Don't think Carter ever got the credit they deserved. Holley had a much better marketing campaign. Pity their carbs didn't match...
A DP works on vacuum. If you knew anything about carbs, you would know this....but you obviously don't.
There is no flow from the boosters of a DP [ or any carb for that matter ] until air speed is high enough through the venturiis to create a depression [ vacuum ] & cause fuel to flow from the boosters.
Craig, sorry if I came on a bit strong. Don't think Carter ever got the credit they deserved. Holley had a much better marketing campaign. Pity their carbs didn't match...
Re: 302 SBF stumble
I forgot to also include in my response that all of the cylinders would hold air pressure (with both valves shut of course) and no leakage could be heard out of the intake or exhaust ports, so I assume there are no bent valves. That's was my basis for not pulling the heads, I just swapped the springs on the car.
Re: 302 SBF stumble
Plenty of choices out there for automotive induction systems and we still FREE to make choices which make us happy!
Carb has always functioned based on the speed of air flow. Get the venturi or multiples of them the right size for the application and you will find success. High performance STREET use is always a compromise!
Carb has always functioned based on the speed of air flow. Get the venturi or multiples of them the right size for the application and you will find success. High performance STREET use is always a compromise!