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| 350 Holley. https://slantsix.org/forum/viewtopic.php?t=45502 |
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| Author: | Brussell [ Sun Jul 03, 2011 1:43 am ] |
| Post subject: | 350 Holley. |
350 holley issues. Pulled it off the car and put a kit through it etc now it is back on the car but when I do start the car. it is very very rough, and goes up and down rpm wise, and misses, (Briefly cuts out and starts up again). I look at the fuel filter (a glass one, where fuel doesn't seem to drain backwards) and their is air in it. Would the 'misses' (the engine doesn't fire for a very short moment) be because of this air and it just has to go through the car? It doesn't have a choke, originally the linkages where the choke would be were glued into position, I'd removed the glue. so the flat rectangular blade could move freely, would this be a cause of the misses or the up and down RPM? (I'm assuming that the intake could make this blade thing move? What size jets should be in the 350 holley? It came off a v8 so I am thinking they are two big. Are than any adjustments I don't know about apart from the Idle adjustment, and the two side screws on the metering block, and the one that adjusts the amount of fuel in the main bowl where the fuel float is? Thank you if you can help! |
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| Author: | ceej [ Sun Jul 03, 2011 11:08 am ] |
| Post subject: | |
The Holley 350 is not an "Entry level" Modification. Your going to need some help based on your apparent understanding of carburetors. The Choke can not be left to it's own devices. Either install the proper choke, or remove the choke blade from the horn completely. One of the choke mounting bolts is a controlled air bleed. That needs to be plugged. For driveability, install the correct choke parts. Float level needs to be set appropriately. Any original jetting, pump cam, shooter, PV, or air bleeds that came on a V8 installation are suspect on the slant six. Someone may be able to give you a starting point for jetting and so forth. More tuning may be needed. In addition to the carburetor mods that are needed, a distributor recurve will likely be required to use this much carburetor. It's a good choice, but you may be looking at a different Metering Block, and some tuning tools to get the 350 set up. What jets are in the carb? What pump cam? Pump cam screw hole? What is the metering block number? What size is the shooter? How about the Power Valve? CJ |
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| Author: | Brussell [ Mon Jul 04, 2011 1:00 am ] |
| Post subject: | |
Thanks, yes my knowledge of carbs is limited I will start doing some research. I still don't think I'm too far off however. I will install the proper choke since I was unaware of the air bleed. I believe the Float level is set correctly. however I wasn't sure if air in the fuel line that can only go into the carb was causing trouble? If anyone is sure on what sized Jetts I should run on the 350 that would be appreciated. I don't really want to pull it all apart again until I have all the stuff I need. (I believe they will be incorrect). I was also completely unaware that you can interchange metering blocks. Will be doing alot of research. Thankyou for all the advice. |
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| Author: | ceej [ Mon Jul 04, 2011 4:48 am ] |
| Post subject: | |
Don't worry about the air in the filter. That's normal. CJ |
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| Author: | DusterIdiot [ Mon Jul 04, 2011 8:32 am ] |
| Post subject: | Yes, if... |
What's the cabr list number stamped on the airhorn? Quote: I was also completely unaware that you can interchange metering blocks.
This is true, but...the exception to the rule is the late economaster/smog carbs are different they use a blunt nosed counterclockwise idle screw and are not compatible with the standard Holley carbs, those are precalibrated and "locked" into their narrow settings for emissions.FYI, -D.Idiot |
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| Author: | Brussell [ Wed Jul 06, 2011 11:50 pm ] |
| Post subject: | |
Found out the issue, I was a victim/stupid enough to buy an item without researching it. This lesson only cost me $50. It was a 500holley. no wonder it nearly blew me out of the car when I turned it on (no exhaust). Regardless I am going to buy a rebuilt holley card that has the number 7448? I believe I was told to look for? Any help or info here would be useful and perhaps suggest numbers for the jetts? Thanks! |
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| Author: | ceej [ Thu Jul 07, 2011 6:26 am ] |
| Post subject: | |
If you buy rebuilt, check on SummitRacing.com They sell "Rebuilt by Holley" Carbs. I have had good results from Holley. Read up on rebuilt carbs with a search of this site. It could save you a lot of time, effort and money. 2¢ CJ |
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| Author: | coconuteater64 [ Sat Jul 09, 2011 7:09 pm ] |
| Post subject: | |
Quote: If you buy rebuilt, check on SummitRacing.com
I never had a problem with rebuilt Holleys, other than a bent float. That may even have happened duri g shipping for all I know. But yeah, it is not an entry level mod; I went with dual Dutras and a hot ignition system and still had to fiddle with mixture and jetting. The results are worth it!
They sell "Rebuilt by Holley" Carbs. I have had good results from Holley. Read up on rebuilt carbs with a search of this site. It could save you a lot of time, effort and money. 2¢ CJ |
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| Author: | Brussell [ Sat Jul 09, 2011 11:32 pm ] |
| Post subject: | |
Thanks for the information. Currently I have a MSD 2 blaster coil, new electronic ignition, headders(soon to be a 2.25" exhaust), and it's apparently had a port and polish (I haven't seen other slant heads) this is just what my mechanic told me and by looking at the runners of the manifold and the ports they line up very well. so I'm hoping the 350 in this case should work fairly well. Next step is to shave the head. Thanks |
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