jimszx Posted November 20, 2004 Share Posted November 20, 2004 I was given a holley 1460 carburetor (the price was right) I have a moderately built SBC that will mate to a 700R4 to go into my 79 zx. Having limited experience with holley carbs, this one is 600 cfm with vacume secondaries, it has # 55 main jets, and secondary spring is the plain (non-colored) oem spring. Will this be a good starting point for my combination? The engine is set up for a 6500 rpm redline. What do you think bigger jets? faster spring? Jim Quote Link to comment Share on other sites More sharing options...
Guest Droopdude Posted November 20, 2004 Share Posted November 20, 2004 I am not sure about the jets since I use an Eddy, but I recommend you read this regarding hooking up your 700R4 TV cable to a non GM carb. http://www.chevytalk.org/threads/showflat.php?Cat=0&Number=496217&an=&page=&vc=1 Quote Link to comment Share on other sites More sharing options...
blueovalz Posted November 20, 2004 Share Posted November 20, 2004 I don't know what the OEM jet size is for this carb, but 55 sounds too small. Just off hand, I'd say it would need at least a 61 or larger. Heck, I think I ran 55 or 56 on my 390. A local speed shop should be able to help you out on this. Quote Link to comment Share on other sites More sharing options...
Guest tony78_280z Posted December 1, 2004 Share Posted December 1, 2004 First Identify your holley part number which is stampted upon the top of the carb or air horn. Mine says 1850-3. Holley and other part dealers use this number not the 1450 or 1460 model number. Part Number / Model Numer. Get it? Tune your carb to fit the motor. The jetting and spring sizes are determined by the performance of the rest of the car. You tune the carb to the motor it is to run on so it delivers the air/fuel that the motor needs, not what you want it to need. Bigger is not better. Too large jets means poor fuel economy and performance (as it has unbalanced air/fuel), too small runs lean. Same for the springs. If you force your 2nds to open too soon you'll simply flood the motor and it'll take a moment for it to catch up causing a slight lag or stall in the motor. You don't want to notice the vac 2nds when they open. It should be a smooth transition. I've read a few books on Holleys, and I've searched the net for info. The best book I've found is the catalog that autozone uses. In the back they have alot of technical information regarding the carbs as well as proper tuning techniques. Ask them if you can borrow it and make photo copies. My local store gave me theirs as they get them for free from holley every season. I have a 1450 (aka 1850-3) 600cfm Vac 2nd. Stock it runs 66 size jets and the clear spring. For my stock 350ci motor I went down one spring size (had to buy a pack of 8 for the one) and have gone down 5 jet sizes. so I'm now at 61. Your 55 is definatly too small. Holley says that if you go down 8 to 10 jets sizes the carb is wrong for the application. If I had to do it again, I'd go with a smaller, say around 550cfm, carb. Smaller carbs have quicker response time, But a lower maximum RPM. How often do you use your maximum RPM? I've learned alot about Holley Carbs in the past few months and I'll be happy to share what I know. Quote Link to comment Share on other sites More sharing options...
jimszx Posted December 15, 2004 Author Share Posted December 15, 2004 The list # on my carburetor is 6160-1 and according to the Holley tech website it was origianally used on 1972 chrysler 440's. Unfortunately when they figured out I wanted information to improve my Carb as oposed to buying a new one the information well dried up. Quote Link to comment Share on other sites More sharing options...
Guest tony78_280z Posted December 16, 2004 Share Posted December 16, 2004 Hmm... I wonder why i was not e-mail notified when you replied to my post. Anyway I didn't notice your reply. I will try to get my Holley Book (from the shop at the farm) and get you some hard statistics on your model carb and e-mail, post it for you. I'll attempt to get this done tonight or tomarrow. But try to get that autozone book. Quote Link to comment Share on other sites More sharing options...
Guest tony78_280z Posted December 18, 2004 Share Posted December 18, 2004 I can not find a part number listing for 6160-1. Are you sure it is correct? I've also done a search for a 440 cid in the 1972 range and find nothing there. Is your carb so rare that it isn't even listed in the Holley Parts catalog? Is this a quadrajet replacement? Spread bore? The closest match to your stats that I can find is ... 0-8006 1975-1976 ... 440 cid (passenger cars exc. lean burn) Vac2nd, auto choke, 2 stage power valve 600cfm. It is one of the few listings for a 440, and the only one with 600cfm. I don't know about the lean burn stuff. It appears that the jet sizes on this model is 62. I can give you more stats on this model but I'm not sure if it'll be helpful. Here is a great webpage if you want to ask this guru http://www.bob2000.com/carb.htm Give me more info and I'll see if I can help. Sorry I'm not much help with finding your exact stats. Quote Link to comment Share on other sites More sharing options...
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