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#1
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Carb replacement Suggestion
I am having trouble with the Holley 4150 on the 1969 Copo 427 idling I had it restored but the consensus is it has a problem does anyone have a suggestion on a Holley replacement the engine is as stock I installed a Factory Muscle 242/242 Solid Flat Cam runs fine just idle when hot in gear
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#2
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Send it to Eric Jackson
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#3
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I have the carb for you. I built this Holley HP 950 for my Copo, it is tuned and fresh. During Covid, I was bored and built both a down leg and an Annular booster 950’s.
This carb is very responsive on the street over a 850
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1969 ZL1 COPO Camaro 11.60@120 F.A.S.T 21 1971 LS6 vette 12.20 @118 PSMCDR |
#5
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Eric will dyno test your carb before it goes back to you, then you can get him on the phone while its running to finish off the tuning. You may need to rebush throttle plate tubes, which some rebuilders don't like to, but its a constant vacuum leak if you don't
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70 L78 Nova Fathom Blue,Bench, 4spd, F41, 3:55 71 Porsche 911 Targa |
The Following User Says Thank You to JRSully For This Useful Post: | ||
dmarr35 (06-04-2021) |
#6
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Carb issues...
Many car issues are difficult...this one is easy. SEND IT TO ERIC.
-wilma
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro |
The Following User Says Thank You to WILMASBOYL78 For This Useful Post: | ||
dmarr35 (06-04-2021) |
#7
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Before sending the carb off...
With the auto and big cam the rpm's will drop when in gear and the advance can will drop out and the idle suffers greatly. Check your distributor vacuum advance. When the car is in gear what is the vacuum reading? Which advance can do you have in the distributor? IF you run a B28/VC177 advance can (all in at 8" of vacuum) it should stay deployed when in drive and allow the car to idle.
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~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos |
#8
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While Eric does awesome work, you may not want to foot the bill that comes with his masterpieces.
I have the same car and have a good idea what will work. I am not looking to sell one of the carbs I have built, just help out a hobbyist like myself. Feel free to pm me if you need help
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1969 ZL1 COPO Camaro 11.60@120 F.A.S.T 21 1971 LS6 vette 12.20 @118 PSMCDR |
The Following User Says Thank You to 1971ls6 For This Useful Post: | ||
dmarr35 (06-04-2021) |
#9
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I remember a saying........
"90% of carb problems are ignition related" Otherwise.......I'm an Eric guy too! Tim |
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