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Author
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Topic: holley carb,car still hesitates
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 05:25 PM
   
I put in a #35 squirter,and the lightest spring.The car still has a delay them comes on good.It only started doing this after I did the cam and long tube header change.
My trans guy drove it,and he said that the car was not getting enough gas.
I was told not to go over a #35 in a VS 600cfm carb.
Any idea's ?The plugs look good,better then they did before the changes.
My car does smell rich during warm up.but it does not have a choke.And it's been cool here.the other day I drove it was int he 40's. ------------------
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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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 05:55 PM
Ron,The secondaries are opening too soon. Try a heavier spring.  SteveW
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:02 PM
quote:
Originally posted by steve'66:
Ron,The secondaries are opening too soon. Try a heavier spring. SteveW
Steve I did it only made it worse ? I tried every spring I had,and I have the whole kit.
I talked to Alex about this.He said it may not be openning soon enough too.
I'm running the small yellow now just as I did before the cam and header change. I floor it and the car goes ok,but then it really starts to move.More of a transition,rather then all at once. ------------------
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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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 06:07 PM
What does your converter flash to? What rpm does it start pulling good at? So it isn't a bog, it's just peaks a little latter?SteveW
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:12 PM
About 2000 rpm flash ,and the motor start to pull good about 3000 rpm.It's kinda of a bog and kinda not.I'm trying to be a wise guy either.It's not like there is nothing there,but then theres more.I should add it only does below 3000rpm. ------------------
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
[This message has been edited by Fastymz (edited 05-01-2003).]
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 06:12 PM
You might need to remove the check ball and try a heavier spring. So the secondaries open sooner. The light yellow spring worked good on the old 351w Mel ran for a couple years. But it was a stick car.  SteveW
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:14 PM
Check was gone when I got the carb.
the yellow spring worked great until I changed things. ------------------
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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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 06:22 PM
Ron,It should flop the seconadies open right away with no check ball and the light spring. 
Put your cardboard "clip" back on and run it only to 2500 rpm then check to see if the secondaries opened up.
SteveW
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:23 PM
Yes they are opening just fine.I wonder if it's not getting enough gas?------------------
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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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 06:30 PM
They are opening early then.  Get a check ball. SteveW
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-01-2003 06:33 PM
quote:
Originally posted by steve'66:
Put your cardboard "clip" back on and run it only to 2500 rpm then check to see if the secondaries opened up.
SteveW
They opened fully at 2500 or less right? That's too early.
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:34 PM
Steve sorry I didn't read the 2500rpm part.I will test that 1st and let you know.And would summit have the check ball?
It seems odd that adding the cam and headers would make them open to early. It still runs stronger then before.
Just trying to do some fine tuning. ------------------
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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capri man
Gearhead Posts: 6417
From: doerun, ga.
Registered: Nov 2000
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posted 05-01-2003 06:52 PM
ron, does it do it from a dead stop or when you kick it while moving? ------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-01-2003 06:55 PM
quote:
Originally posted by capri man:
ron, does it do it from a dead stop or when you kick it while moving?
Mike only from moving,not from a stop.It pulls real good from a stop leaving at idle or 1500rpm.
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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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capri man
Gearhead Posts: 6417
From: doerun, ga.
Registered: Nov 2000
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posted 05-01-2003 08:16 PM
ok cool, thought we might be working on the wrong end of the carb. lol------------------
mike r
racing is real
everything else is just a game.
81 capri-7.51 @89mph 1/8
1.54 60 ft.
http://prestage.com/site/site_display.asp?SiteID=141
IP: Logged |
Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-06-2003 12:20 PM
quote:
Originally posted by steve'66:
They opened fully at 2500 or less right? That's too early.
Steve it's only open about 1/4 of the way at 2500rpm.It seems to open all the way at 3500 rpm.
What do you think,
I put the #31 squiter back in.And did alittle better,but then the slight surge comes back when you let off the gas.WHich was not there with the #35.The car also smeels alittle like gas,or rich at cruise speeds once in a while. I noticed that both throtle shafts seem to be alittle wet ever time I drive it.It not much enough to collect dirt there.I wounder if they both are causing some kind of vacuum leak?
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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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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-09-2003 12:20 PM
Does any one have any more advice? ------------------
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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indyphil
Gearhead Posts: 2398
From: Senoia, G.A. USA
Registered: Jul 2002
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posted 05-09-2003 03:31 PM
I dont think you are feeling a vacuum leak, that usually rough at idle conditions. I would have expected the secondarys to open SOONER with cam and headers. Maybe it is too soon like Steve said. I maybe wrong about the secondaries though its not like I have been through it myself yet. What about your timing, have you checked your distributor weights/timing? get a strobe light on that and make sure everything is working right. I know its probably fuel related but it doesnt hurt to eliminate the variables.
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Fastymz
Moderator Posts: 18703
From: Reno Nv USA MEM#1240
Registered: Apr 2001
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posted 05-09-2003 06:23 PM
Phil it could use alittle more timing.But everything is working good in the dist.I think I need to try a more heavy spring agian.------------------
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
IP: Logged |
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