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Re: need some carb tune advice
[Re: We The People]
#1295842
09/05/12 08:53 PM
09/05/12 08:53 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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You have the timing set right FIRST.... next WHY are you at 2.25 or more turns out on the mixture screws... you should be about 1 1/4 turns out 
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Re: need some carb tune advice
[Re: We The People]
#1295844
09/05/12 09:42 PM
09/05/12 09:42 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
yes, the screws are out there cause thats where it would run...I thought the timing was good cause it would run pretty well and start, (getting close) but with out kicking back.
Now... I am thinking it may need more timing to run well..and I'll need to utilize more * in the start retard.
I'll be going back to a bit of a baseline of 26* with 5* start retard, while locked out. Then I'll get it idling and bring the timing up a bit at a time.
I know it will ping in gear @ 35* cause the big 10* advance bushing stuck out once (needed some more oblonging).
I'm thinking I've got about 6* to mess with and look for the sweet spot. Then a more custom bushing may come into play.
I'm learning a lot as I go here, and trying not to break stuff. Kinda fun .........kinda a pain
Turn the start retard off and lock the dist... set
the timing at 18*-20* dont worry about total YET...
you need to figure out the basic timing and get the
carb set.... once you know some basic numbers you
can figure the total needed and then use your retard
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Re: need some carb tune advice
[Re: We The People]
#1295846
09/05/12 11:13 PM
09/05/12 11:13 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Are you SURE the cam is in right... did you degree it EDIT Is this MSD ignition... sounds like the dist wires are backwards
Last edited by MR_P_BODY; 09/05/12 11:22 PM.
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Re: need some carb tune advice
[Re: Thumperdart]
#1295848
09/05/12 11:45 PM
09/05/12 11:45 PM
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Joined: Sep 2009
Posts: 928
NC
SLOW67
super stock
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super stock
Joined: Sep 2009
Posts: 928
NC
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Quote:
Quote:
thanks, thats a great idea. honestly I hadn't thought of that, since I'm in the boondocks. I'll have to search chassis dynos near me, I'll probly have to tow three hours.........or cross over to canada and deal with the border gestapo.
It is a good idea but why not hook up a wide band and have a year round dyno at your finger tips plus, your not moving on the chassis dyno which changes your wot readings........... 
I will never build another car boosted or not without a wideband. I have saved alot of time pulling my hair out by getting an Innovate that datalogs
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Re: need some carb tune advice
[Re: SLOW67]
#1295849
09/06/12 12:07 AM
09/06/12 12:07 AM
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Joined: Apr 2009
Posts: 190
Communist New York State, Comi...
We The People
OP
member
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OP
member
Joined: Apr 2009
Posts: 190
Communist New York State, Comi...
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yeah Guys, NO doubt there great. I do plan on getting a wide band for next year, when I can drive it on the road. but Right now you don,t even need it to know it is rich as hell idling. I'd be happy with a ball park decent idle, so I can store the car happy. The problem more lies in the fact that if I had a wide band and it told me I was way rich at Idle, I'd still have to figure out how to cut it back, smooth it out, and keep the car running. Thats what is giving me the fits, the normal procedures dont seem to be netting goals. Maybe I'm asking too much of the old 850dp. Does any one no if a 2 circut idle with .035 IFRs will run a 493 with this 266 @.050 cam? I was looking at the 850 mighty demon........looks good "I'm making a drink and getting in my hottub" Me thanks everyone 
Last edited by We The People; 09/06/12 12:25 AM.
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Re: need some carb tune advice
[Re: We The People]
#1295854
09/06/12 01:35 AM
09/06/12 01:35 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
yes, I believe it may be lean as far as the idle circuts go. which forces me to open the blades into the t slot to get fuel to it. BUT the t slot then makes it Too rich, then the vac drops and makes the pv open and worsens the problem.
the reason I think this way is, cause no matter how big I drill the plate holes I still have to open the blades into the t slots the same amount. I think it may need the t slot fuel cause the IFRs are too small.
Does this make sense to anyone else?
If you drilled the plates I think you screwed them
up... did you pull the mixture screws out and blow
air through the holes
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Re: need some carb tune advice
[Re: We The People]
#1295856
09/06/12 09:36 AM
09/06/12 09:36 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
the holes may be too big now I agree. I'll just buy a couple blades. I,m pretty sure the idle holes are clear we held the shop vac right up to the bit while drilling. and Ive inspected and ran it about 15 times, and it always had about the same adjustability.
its apart now, I will disassemble and blow it out just in case.
With the holes you move more air... you said you were
lean on idle so the holes will make it worse
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Re: need some carb tune advice
[Re: We The People]
#1295859
09/30/12 12:44 AM
09/30/12 12:44 AM
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Joined: Apr 2009
Posts: 190
Communist New York State, Comi...
We The People
OP
member
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OP
member
Joined: Apr 2009
Posts: 190
Communist New York State, Comi...
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ressurecting Cause of my success in the fight of this problem.  The issue was due to TOO SMALL IFRs. The throttle plate holes are plugged, the timing is now locked @32 with 5 degrees start retard,(which is the only setting it likes) The ifrs were .035 to start with and ended up @ .041. Now it starts up great cold or hot, idles nice @ 1000 and @ 800 in gear, with 8-9 inches of vac. the transfer slots are right where they should be, the idle mixture screws are out 2.25 turns (a little far but its cold out right now). I did some brake tests (no stumbles) and took it out for a quick rip. It will blaze the slicks from a jog with a quick 1/3 throttle stab. Thanks Competition Wedge.....great cam cant wait to get a wide band for summer time testing
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.........why not try a smaller(richer)idle bleed to get the screws closer to 1-1 1/2 turns out........ 