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Numbers will just be numbers unless all heads are tested on the same flow bench.

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Magnum really doesn't compare to j. Magnums flow better and have a smaller combustion (closed) chamber.

Got the secondary idle conversion and installed it yesterday. Now, I just need to get it out of the garage sometime and try tuning it.

Thanks for the link, ordered today!

10 pages wouldn't cover a Holley.

The worst part about my secondaries is getting to the adjustment screw. I need to do some modification there. The last time I adjusted it, I had to remove the carburetor.

I have a Holley book and then bought a tuning guide from 4secondsflat. I like your idea about opening the secondaries a bit, never thought of that. Yep, I'm in sutton not far at all from clarksburg.

Holley is sales only in my opinion. Calling them was pretty well the same as calling dell computers help line. I got the most information from Don at 4secondsflat.com

I went with the blue cam and kept working my way up squirter size until I settled on a .040 squirter with a hollow squirter screw. It's running pretty good now. It's pretty well night and day to before. Before, it wouldn't take throttle quickly off idle. Now, it almost feels good. I have a...

I know it's been a while but I finally got around to changing the pump cam last night. I'll be testing it this evening. I'll try to keep this thread updated a little better from now on.

Another day and still no time... I'm planning to do more roof shingles tomorrow evening and Wednesday as well. I'll follow up on this thread as soon as I get it figured out. All parts are here, I just need time.

I got the tuning kit last Thursday and have not had time to touch it. I'm building a house right now and it's gobbling up all my time.

Light throttle and thanks for the graph! I've never seen that one before.

Thanks, I'll drink many beers getting it all sorted out.

Thanks for the encouragement, I have been so frustrated with this setup. I'll work on it until it beats me and then leave it be for a month or so. I'm determined to get it working smoothly. I love driving this thing.

Thank you, I'm thinking his expert advice is a little too expert for me. Then again, we'll see when I get all the different nozzles and cams.

Stock primary jetting was 69 with 75 secondary. I should have the pmp tuning kit this week. I'm hoping to get it running right so I can drive it some this summer. I installed a new detroit locker last winter and I need to introduce it to the local Chevy guys.

I got all the bits I'll need to make it work if it's possible...LOL I have way too much money in this carb setup.

MY engine is putting out around 290 hp at the tires with somewhere in the neighborhood of 350ish torque. I ordered the holley tuning kit and a new 4 hole 1 inch spacer just now. I'll update later after i receive the parts and get a minute to work on it.

I have a Magnum M1 single plane and the air gap but I chose to use the air gap since it's dual plane and this is a street driven car. I had the M1 on the car for a while but the engine had other issues (blown head gaskets) so I really haven't ran it with everything working properly.

Thanks fellas, it looks like the one item nobody argues is the intake. I was told by a pro the intake plenum was too big for a 318 and I would need at least 380 ci to make it work correctly. Today, I'm gonna order the Holley pump tuning kit and see if I can get it worked out. This is the kit...

Bump, is nobody running this intake on a 318 here?

I thought about a wideband and I've thought about just adding fuel injection since but I'd like to get it worked out without going that far. From what I've read, the airbleeds are fine as long as you have enough adjustment on the air screws -which I do.

I have changed the squirters but I think I went too big since I only had one bigger in my cabinet. I may order a squirter tuning kit and see if I can get it to work better. I tried a 1 inch four hole spacer which was supposed to help with my problem - (velocity) but it didn't seem to help which...

The manifold vacuum is around 16 at idle.

Floats are correct, no vacuum leaks, Holley HP doesn't have a choke or choke tower. Transmission is manual so no in gear test to perform. Timing is 34 degrees at 3000 rpms. Fuel pressure is 7 at the carb. I have the pink pump cams and a 28 squirter on the primary side.

Wow, quick responses - awesome. The hesitation is off idle. I forgot to mention the transmission is a manual 5 speed so no torque converter worries. The hesitation is off idle and even in neutral with no load. It hesitates and then picks up. WOT is fine. Also, low speed cruising is horrid. I...

I have been running an edlebrock air gap intake on my magnum 318 and can't get the hesitation worked out of idle. I have been told the intake has too much plenum for 318 cubic inches and this combination will never work. Can anybody give me some advice? Engine details... 1994 318 Magnum stock...