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03-24-2009, 01:11 AM
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I have prolly 20 holley 4 barrel carbs I know I could put together a double pumper or 4 just need to know what to use as for part #s on what body and everything my dad was awesome with all this but he past away and I have no one to learn from now so I resort to the computer for my info
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03-24-2009, 06:44 AM
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First, I sympathize with you on the loss of your Dad, It's tough. I know.
One choice would be a 4779 Holley, number found on the choke air horn. Double pumper mech. 2'ndaries, 750 cfm. I would start with the jetting that came in it- I don't have my Holley book in front of me ATM, but can find the stock specs if you don't find them elsewhere. Power valve depends on your manifold vacuum. Start w/a 65 and go down if needed. I would run it and tune from there.
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03-24-2009, 11:18 AM
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thanks alot cobalt thats what Ill try then
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03-29-2009, 12:56 AM
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just out of curiousity prolly not much difference in expensive stud girdles and cheap ones right? I know because I AM running sollid roller I should run them especially with 3/8 screw in studs I should run them so would some cheap summit ones be ok or tell me why I should run more spendy girldles
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03-29-2009, 01:01 AM
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Summit's girdles are decent pieces. No fancy anodizing, but who cares
 --they fit and worked just fine the two I've used.
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03-29-2009, 08:59 AM
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Quote:
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03-29-2009, 09:07 AM
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as stated previously, i feel that a 750 (4779) will give you at least 10 maybe 15 to 20 more hp. as for the heads, i feel in stock form they are limited to maybe 440 hp, so whatever port work is done will determine hp output. i haven't seen any dyno tests on these heads with a roller cam, maybe someone here has. my guess is about 475 hp, with ALOT of torque. if the heads are better than i believe, you could see 500hp (jmo).
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03-29-2009, 09:21 AM
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4779 jetting is 70 or 71, front, and 80 rear. the older ones had 70 in front, the newer ones, around 4779-5 and up had 71 in front. all but one came with 80 in the rear. i've found stock holley jetting is usually very close.
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03-30-2009, 01:11 AM
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I am gonna buy some new rocker arms this week should I run a 1.6 on exhaust side or 1.6 all the way around or just 1.5s and thanks guys really appreciate the help and advice guys
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03-30-2009, 03:55 AM
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She's So Fine, My 409....
Holley Strip Dominator, 780 carb, E-Brock 185cc intake runners, 2.02/1.60, CompCams XR292R solid roller. 1 3/4" headers, open exhaust. 11.30:1 static compression ratio, 8.91:1 dynamic compression ratio. RPM HP TQ 2000 141 370 2500 197 414 3000 244 427 3500 308 462 4000 375 493 4500 440 514 5000 496 521 5500 534 510 6000 552 484 6500 553 447 7000 529 397 7500 505 353 8000 437 287 Last edited by techinspector1; 03-30-2009 at 04:08 AM.
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03-31-2009, 01:00 AM
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thats awsome thanks for doing that tech inspector I was hoping somebody would do that what program do you use to dyno the engines like that and where do I buy it
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03-31-2009, 01:09 AM
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DynoSim Advanced Engine Simulation version 4.20 with Pro Tools. Comes from Pro Racing Sim LLC. This was a $250 sim that was on sale for $99. Might still be.
http://www.proracingsim.com/ If I were to do it over, I'd buy a stronger Sim with more cam spec software in it. Edit: Just looked through the website. Recommend DynoSim 5 with Pro Tools for $99.95 and Cam Disc 8 for $49.95 Last edited by techinspector1; 03-31-2009 at 01:19 AM.
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04-02-2009, 12:35 AM
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I ordered my push rods today so now I need someone to talk me into buying new rocker arms all I got is stamped roller tip 1.5s and what should I run 1.6s all the way around or just on exhaust side or just stick with 1.5s ?
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04-02-2009, 12:58 AM
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It's your call. More lift means earlier fatigue on the valve springs. The DynoSim I did for you was with 1.5 rockers and I didn't see too much wrong with those figures....
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04-02-2009, 11:33 AM
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appreciate all your help tech inspector should have it going soon and will let you know what i think our drag strip wont be open for awhile but will keep you updated
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