Guest milmascaras Posted March 12, 2002 Share Posted March 12, 2002 My 1st V8Z Dropped the V8 yesterday in my 77 datsun 280.I have slepted w/ the JTR manual under my pillow(hoping for osmosis) buying carburator this weekend and need help. I have done the search engine and read the posts. Problem arises is that i need something simple. I get lost in the opinions vs. experience column. 600 or 650 or 750 - holley or edelbrock Engine is from an 86 camaro 350 w/ 350TH auto trans 4 port aluminum intake, not much more I can tell you about what the engine has. Bought it from a friend of a friend, who needed $$ story. I am not brand loyal, just want a good carb for this setup. My intentions are not how fast I can get down the track, rather look how beautiful this creature is and how smooth it runs. what would you buy? Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 12, 2002 Share Posted March 12, 2002 holleys are good carbs for makeing max hp but if your not into tuneing Id get an EDELBROCK 750 cfm Carburetors (this works well on almost any hot street engine) Manual Choke Recommended for most Performer RPM/Torker II applications and large cubic-inch Performer applications. Includes both timed and full vacuum ports for ignition advance. Electric choke #1478 can be added if needed. All Edelbrock carbs come with an installation kit and Owners Manual. Comes with the following jets, rods and springs: Metering Jets: Primary .113, Secondary .107; Metering Rods: .071 x .047. Step-Up Spring: orange (5" Hg). 750 cfm, square-flange, manual choke #1407* Ive had very good results with this carb on hot street 350-383 sbc cars but if your more interested in fuel economy......... 600 cfm Carburetors(youll give up about 10hp but only at above 5000rpm) Street Legal, Electric Choke 50-state street legal for all Chevrolet/GMC V8 engines, 1980 and earlier (E.O. #D-215-10). Calibrated for maximum fuel economy. Includes timed vacuum ports, EGR and fuel vapor outlet. Comes with installation kit and instructions. Not for computer-controlled engines. Comes with the following jets, rods and springs: Metering Jets: Primary .098, Secondary .095; Metering Rods: .073 x .047. Step-Up Spring: orange (5" Hg). 600 cfm, square-flange, electric choke, EGR #1400 both are bolt on and with very little if any tuneing your set to go!! Quote Link to comment Share on other sites More sharing options...
John Scott Posted March 13, 2002 Share Posted March 13, 2002 So what carburetor is best if your willing to tune your carb for max performance? Any of the Holley or Holley clones better than others? JS Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 13, 2002 Share Posted March 13, 2002 if you want the best on the market, http://www.bgfuel.com/demoncarbs/ 5402010GC 750 Mighty Demon http://www.bgfuel.com/demoncarbs/tech.htm Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted March 13, 2002 Share Posted March 13, 2002 Originally posted by milmascaras:what would you buy? #1406 Edelbrock 600cfm electric choke hands down is my choice...unless you have a manual choke cable and then their manual model would be my choice. Get the tuning kit as well, it's easily tuned with independent circuits and a great simple/laymans guide on tuning NOONE can screw up if they follow it. Best bang/buck I'd spent on my setup over the years. Some have had issues with dialing in 750 edelbrock's on the strip that seemed to disappear with the 600's. 600cfm edelbrocks have fed dynoproven 450hp+ motors so it won't limit your setup & the front hung floats don't hurt for roadracing Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 13, 2002 Share Posted March 13, 2002 The donar engine for my Tomahawk Z is a 350 SBC in a Monte Carlo with the Edelbrock Performer Package.It is not a real hot performer but very reliable and easy to herd that horsepower down the highway. I bought the whole car for $450.00 and it does not burn oil and always starts easy to blow the cobwebs out..I am not Grumpy Vette so Edelbrock figured the combination out for me. If only I could get the motor in the project!!!! I am fairly sure my donar engine is equipped with a 600CFM Edelbrock. With the turbo 350, the old Monte Carlo is a GASHOG!! Quote Link to comment Share on other sites More sharing options...
Wagz Posted March 13, 2002 Share Posted March 13, 2002 Grumpy/others: Has anyone had any experience with the Holley Street Avenger carbs? I'm no carb expert, and I remember spending long hours years ago trying to get/keep a double-pumper adjusted right on a Camaro I used to have. I've been told the Street Avengers are much easier to tune than the 4150/4160 series units. I've been considering the 770cfm Avenger for my set up. Any comments? Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 13, 2002 Share Posted March 13, 2002 WAGZ post that question in the fuel injection forum at CHEVYTALK , DOUG who runs that forum is a HOLLEY ENGINEER and will know more about that. Quote Link to comment Share on other sites More sharing options...
Guest milmascaras Posted March 14, 2002 Share Posted March 14, 2002 Don't need to fill you guys full of compliments for your advise, but it is appreciated. Your passion motivates me to finish quicker and show off my ride. 600 edelbrock seems to be the choice. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 15, 2002 Share Posted March 15, 2002 I've tryed three differ holley's and the 650 dblpumper is the best hands down. I've tried a 750 vacuume secondary and upgraded it with the quick spring kit changed the jets and power valves and went with the lightest spring even cut it and couldn't get the performance out of it leave the vac. sec carbs for heavier cars. I got a 700 dblpumper with the 50cc accelerator pump and still don't get the times I got with the stock untouched 650 dbl pumper. the carter and edelbrock are both very good carbs for the street easy to tune and reliable keep the carb sizes under 700 for better power you would have some built engine to gain any power from having anything larger go to a carb calculator to find out what you might want www.smokemup.com has a lot of Auto math Calculations good luck Quote Link to comment Share on other sites More sharing options...
Guest Rick Johnson Posted March 15, 2002 Share Posted March 15, 2002 I have a Avenger 770 on my 383. From the factory it was a disaster. The secondaries would not open and the jetting was rediculously off. I used a G-Tek meter and wide band O2 sensor to correct the mess from Holley. First the secondary spring had to be completely removed or they would not open fully. (Thank god for the g-tek or I would have never believed this to be the case) Primary jet size of 72 was OK but the enrichment circuit was way too big. I threaded the enrichment passage and drilled out set screws to get my primary WOT mixture correct. .046 worked for me. I disconnected the secondaries while jetting the primary side to avoid confusion. Seconday was way too lean with stock 75's. It took 79's to be rich enough at WOT. These settings resulted in WOT air fuel ratios of about 13.1 to 1. This also produced the most horse power. If you are worried you could jet up 1 size to avoid overheating but I ran these settings at the streets of willow and did not heat up for the first 15 minutes. This would probably be fine for most people but being the perfectionist I am, I installed a 2 stage power valve so the mixture ratio would remain more constant at small to medium throttle openings. (The sensor proved how poorly big Holleys meter fuel at small throttle openings) The idle mixture screws are far too sensitive and they are only 1/2 turn out from fully seated. With out the wide band o2 sensor I never would have believed I had to make adjustments in less than 1/16 turn increments. The carb works very well now, in fact it makes 20 more horse power than the Q-jet and max HP is at a leaner AF ratio indicating the carb meters fuel better at WOT. But I must repeat I was unbelievably unimpressed with the factories initial settings!!!! I hope you guys can benefit from my development with this carb. PS - Make sure you monitor your fuel pressure right at the carb under extended WOT conditions. It should hold at least 4 PSI. If it does, don't worry about larger lines or bigger fuel pumps if you are in the 400 Horse Power range. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 15, 2002 Share Posted March 15, 2002 Originally posted by Rick Johnson: First the secondary spring had to be completely removed or they would not open fully. (Thank god for the g-tek or I would have never believed this to be the case) Hey Blkmgk, your running a Avenger with the same malady no? Regards, Lone Quote Link to comment Share on other sites More sharing options...
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