Author
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Topic: Better e.t.s today but had carb problems (long)
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bluestreek Gearhead Posts: 1086 From: Athens,GA Registered: Jul 2001
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posted 03-23-2003 12:27 AM
Before driving to the track I decided to fix a few things and also recurve my ign. timing a little since I started noticing a little spark-knock. I revved the engine up to about 4000 and held it a few seconds when I noticed that the carb began to load up. I put a new float valve in and it seemed to help. I made it to the track OK but 3 hours late and missed both time trials and the first Sportsman elimination. The only thing I could do was run Trophy Street bracket class and dial in 13.00 flat. My first race, I ran against a '70 Dodge 340 Challenger with a 13.10 dial and I climbed his tail so fast that I made him break out. Then my 2nd run was against a 69 'Vette that was also dialed in at 13.00. My carb flooded again after my burnout, so I decided to make this my last run and show the 'Vette what my little 13 second Mustang could really do. I dropped my clutch at about 3000 rpms and felt the car push me back in my seat like it has never done before!! I passed him at mid-track in 3rd gear and wound up running the cars best ever e.t.60' ... 1.81 1/8 ... 7.80 @ 91 mph 1/4 ... 12.11 @ 114 mph Now if I could just figure out the carb problem. It's loading up above 4000 rpms when it gets free revved or during burnouts. I wonder if I need a pressure regulator for the Carter strip pump?? ------------------ 1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi. 1st pass: 12.50 @ 112 mph DanH
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steve'66 Gearhead Posts: 5659 From: Sonoma,CA,USA Registered: Mar 2000
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posted 03-23-2003 12:45 AM
Dan,That's mid 11 second mph, just gotta get your 60'rs down. What's a carter strip pump? Mechanical? If its mechanical that might explain it and a regulator might help. SteveW [This message has been edited by steve'66 (edited 03-23-2003).]
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steve'66 Gearhead Posts: 5659 From: Sonoma,CA,USA Registered: Mar 2000
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posted 03-23-2003 12:47 AM
oops[This message has been edited by steve'66 (edited 03-23-2003).]
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bluestreek Gearhead Posts: 1086 From: Athens,GA Registered: Jul 2001
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posted 03-23-2003 12:54 AM
Yes. It's a mechanical pmp that's supposed to be rated at 120GPH at 7.5 psi. ------------------ 1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi. 1st pass: 12.50 @ 112 mph DanH
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steve'66 Gearhead Posts: 5659 From: Sonoma,CA,USA Registered: Mar 2000
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posted 03-23-2003 01:34 AM
Dan,It could be blowing fuel past the float's valve(s). Try a regulator set at 5-6psi, it should cure it. Good luck, Nice run btw SteveW
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V8 Thumper Gearhead Posts: 2991 From: Orange, Ca. United States of America Registered: Dec 2001
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posted 03-23-2003 09:26 AM
Cool! ------------------ 1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle http://mustangsandmore.50megs.com/V8Thumper.html [This message has been edited by V8 Thumper (edited 03-23-2003).]
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Hans olsson Gearhead Posts: 249 From: Sweden Registered: Apr 2000
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posted 03-23-2003 10:04 AM
Good run Dan .Maybe you have some loose dirt or rubber from the hoses that keep the inlet valve from closing,it could happen at any time. Mid 11 for sure with good 60 ft time,1.6-1.65 maybe? ------------------
- 71 Mach1 351c
- E/SA 11.89-110 mph
- F/SA 11.76-111 mph
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Fastymz Moderator Posts: 9095 From: Reno Nv USA MEM#1240 Registered: Apr 2001
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posted 03-23-2003 01:40 PM
Dan those times are great. 1/4 ... 12.11 @ 114 mph Thats a kick a** street car. ------------------ SCOOP oddly obsessed with big scoops on little Mustangs 2.26 60'S 14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede. https://mustangsandmore.com/ubb/Fastymz.html
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bluestreek Gearhead Posts: 1086 From: Athens,GA Registered: Jul 2001
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posted 03-23-2003 02:23 PM
Thanks guys! What is surprising to me and everyone at the track is the fact that I'm still using a mechanical fuel pump, stock fuel line, stock distributor, vacuum secondary carb, no MSD, fairly quiet 2 1/4 " exhaust, 3.50 street gears, and simple traction bars. This could mean that there is a lot of improvement left on the car. Steve'66, I have a cheap edelbrock pressure regulator that I bought a few years ago for the time I tried a edelbrock carb. I quit using it on the Holleys cause I felt it was restricting the flow volume. Who makes a decent priced high volume regulator?
------------------ 1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi. 1st pass: 12.50 @ 112 mph DanH
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V8 Thumper Gearhead Posts: 2991 From: Orange, Ca. United States of America Registered: Dec 2001
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posted 03-23-2003 02:45 PM
Hey Dan, check this out:http://store.summitracing.com/partdetail.asp?part=23230 It's an Aeromotive regulator, in a Summit box and not anodized (and almost half the price! ). It's what I run ------------------ 1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle http://mustangsandmore.50megs.com/V8Thumper.html
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bluestreek Gearhead Posts: 1086 From: Athens,GA Registered: Jul 2001
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posted 03-23-2003 07:39 PM
Thanks for the heads up yo! Looks like a good deal.------------------ 1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, TFS alum. heads, ported Stealth 8020 intake, Xtreme 274 Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi. 1st pass: 12.50 @ 112 mph DanH [This message has been edited by bluestreek (edited 03-23-2003).]
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