The Holleys I run hold their tunes that long too. When it seems one is "out of tune" the problem is rarely the carb, but an ignition problem causing it.
Or some other engine problem.....like vacum.
Want to upgrade to a 4bl, need some suggestions
- Thread starter bsc1
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Or some other engine problem.....like vacum.
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Yes, there is....on a 289 a '6500' rpm carb is around 600-650 cfm rated.....on a 427 rectangluar port Chevy a 6500 rpm carb is around an 850 cfm rating.....it all depends on your cid and how well you use it.
so i guess the 850cfm carb used on nextel cup engines is a 9300rpm carb? sorry but carbs, for the most part, dont limit rpm, unless they are very small. even with a restrictor plate a nextel cup engine makes around 500hp above 7500 rpm.
as for the
1: look at his engine combination. it is quite mild, and he wants a daily driver, so he is going to want and need decent fuel economy.
2: most street engines dont need a 650dp carb, and most street engines like the one indicated dont need more than a 500cfm carb. putting a carb that is 100-150cfm larger MAY improve performance, but not by enough to warrant the loss of fuel economy.
as for the
d.hearn, zookeeper, and historic have earned my respect when it comes to dealing with cars, and that it tough to do. and dont tell me to get some real world experience, been there done that, got the T-shirt and ruined it with grease. i do have "real world" experience. things like crewing on a circle track car, and crew chiefing on a fuel altered. enough real world experience for you?
13k rpm? in 1974? sorry but i am calling
on that one. even bob glidden was barely cracking to 10k rpm barrier in pro stock, and formula one didnt break the 12k barrier until the mid 80's. i would accept more like 9500rpm, but NOT 13k.13k rpm? in 1974? sorry but i am calling
Glidden was running a 358 cid Cleveland motor with a 3.5" crank and Dan was running a 287 cid with about a 2.5" crank...you DO see the difference...don't you.
1. 289'S don't make more torque than a turbo 305
2. 4777...without a suffix, smart ass
3. Get some real world experience and get back to me.
4. 'Bought into the ad campoaings'????? right...like Shelby's "Cobra Kits" that were MATCHED componets....kind of like the Gurney-Weslake 305 I had in 68....you know.
everything in the engine was built for 8500 rpm. Ever been THERE? Didn't think so. Or how about Dan Perrin's Cross-Ram Dual 4-barrell Chambered exhaust 68 Z/28 that he turned into an 'f' gas 287 cid 13,000 rpm 10.2 1/4 cart in 1974?
Do you think he used components that were designed to operate at wildly different rpm?
God, please deliver me from the fools who konw more than people who have actually DONE something.
Turbo 305? I don't think so. It wasn't a Cheby motor in there but a turd Poncho 301. My wife had one. And it WAS a turd.
I'd match a 289's torque against a 301's anytime. 8500? don't NEED to go there. And finally 13K engine's ? Who you trying to ****? Had to roll the pants legs up when I read that. 
The Indy DOHC's didn't quite go there.Better go back to math class JR. You'd need a 4.25" bore with a 2.5 stroke to get a 287. That wasn't happenin in the late 60's in a small block Chevy.
wow this thread changed a bit but even though I think carbs suck on that combo an autolite 4100 on a performer would run great almost as good as TBI, BTW I just bought a friend a summit racing chinese rpm knockoff for 118.00 and the quality was very nice, they just raised the price in a week to 129.00.....
Turbo 305? I don't think so. It wasn't a Cheby motor in there but a turd Poncho 301. My wife had one. And it WAS a turd.
You're right, it was a 301...I know that is a huge difference to a 305....but I digress and the 13k..you just don't know Dan. Try this...how tight did Ronnie Sox twist a 409 Chevy in 1962? Before you jump, I grew up in Burlington, NC during that time and stood behind Mr. 409 #1 and saw the tach at launch. It was 8500 rpm. and the guy who said a sbc couldn't have a 4.25 bore in the 1970's....tell me what block Dan was running....it started out as a 2 bolt passenger car unit...NOT a 302 or 350 4 bolt.Ever hear of boring the cylinder all the way out and sleeving the motor? Street 250 LM Ferrarris were turning 8500 in 1960. Honda motorcycles saw 18,500 in 1968....Randy's 494 cid BB Chevy turned 8200 in 1970.
Pete Hill(you do know who Pete is, don't you...NHRA Top Fuel bike 4 years running) built a 150 cid Harley clone motor that turn 8500 and it's stroke is something like 4.5".
Get a clue guys, drag motors were always ahead of roundy pounders back then when it came to rpm. Even the Cosworth DFV (you DO know what DFV stands for, right) engine at Indy.
You keep throwing out numbers like you're trying to impress someone, it ain't doin nothin for me. DFV-- Double Four Valve or in other words, a DOHC four cylinder cast into a V8. Have fun with your dreams of super high rpm motors, I don't have a need or use for them and they never impressed me. I like my engines to last, 13K engines don't, unless you're talking about turbines.
zookeeper
Founding Member
You needn't pray to the Almighty for salvation, just get up from the computer.God, please deliver me from the fools who konw more than people who have actually DONE something.
zookeeper
Founding Member
Yeah seriously. Not too keep it going either, but you should read this thread http://forums.stangnet.com/showthread.php?t=706248 about someone else who picked up one of those manifolds. I'd be curious to know if theirs have similar issues or if the quality has improved.
Hack
15 Year Member
I had always heard the the Performer was so mild that it's not even an upgrade from most stock manifolds (other than saving a few pounds). I suppose you might feel a difference from a 2 barrel carb / intake combo. I guess from the info I've always heard I wouldn't spend the money on a Performer unless I just wanted the look of a 4 barrel and didn't care about performance. I MIGHT use a Performer if I got it free, but probably not. Edit: I'm never after fuel economy, so the Performer could be a good choice for the original poster. You can find them used pretty cheap.
If I were to upgrade I would pick parts from D. Hearne's original post. The air gap might be a little spendy now because it's new, but that would be a nice choice. He also listed stuff you can find cheap, used at swap meets or eBay. I found a used Wieand Stealth for my roller 302 and I like it.
If I were to upgrade I would pick parts from D. Hearne's original post. The air gap might be a little spendy now because it's new, but that would be a nice choice. He also listed stuff you can find cheap, used at swap meets or eBay. I found a used Wieand Stealth for my roller 302 and I like it.
Hack
15 Year Member
you obviously have no clue as to the engine combo glidden was running in the 70's. it was NOT a 358ci engine, it was 340ci to get a weight break(cleveland powered cars had to run more weight per ci than everyone else). glidden used a 4.08 bore with a 3.25 stroke. and yes he had the bores sleeved to allow the large overbore.
It is quite clear there is only one way to resolve the issue to hand between the rival parties.
Rock paper scissors. PM me your respective choice, I will review the submissions and declare the rightful victor. Please, no "nukes" I don't care if you used them in 3rd grade, the choices are rock paper and scissors, standard rule set, 3rd revision as dictated by the national RPS council. Rock > Scissors Paper > rock Scissors > paper.
Submissions will be expected by 6pm PST today. Failure to submit a proper answer will be an immediate forfeit.
If you are unable to send a proper response due to literacy issues or complications that may prohibit you from properly spelling "rock" or any of the other choices, a picture of a rock will suffice.
Good luck gentlemen, and may God be with you.
Rock paper scissors. PM me your respective choice, I will review the submissions and declare the rightful victor. Please, no "nukes" I don't care if you used them in 3rd grade, the choices are rock paper and scissors, standard rule set, 3rd revision as dictated by the national RPS council. Rock > Scissors Paper > rock Scissors > paper.
Submissions will be expected by 6pm PST today. Failure to submit a proper answer will be an immediate forfeit.
If you are unable to send a proper response due to literacy issues or complications that may prohibit you from properly spelling "rock" or any of the other choices, a picture of a rock will suffice.
Good luck gentlemen, and may God be with you.
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