BBC Big M heads on 598?

[LuckyDawgRacing]

I'm putting back together my 598 and have someone who wants to trade me a set of dart big m heads for my bb2x's both sets are not ported, and the cam I'm using is 799 lift and 288 duration on a 110 c/l running alky inj. and shifting a 4 spd at 7500 crossing the stripe at 7775. I want to know if its worth trading heads or not. will the big m's make more hp?

[hammertime]

I'm putting back together my 598 and have someone who wants to trade me a set of dart big m heads for my bb2x's both sets are not ported, and the cam I'm using is 799 lift and 288 duration on a 110 c/l running alky inj. and shifting a 4 spd at 7500 crossing the stripe at 7775. I want to know if its worth trading heads or not. will the big m's make more hp?


Them big m's are actually very good heads. I had them on my 548 everyone said they were way to big, so I swapped to dart 355's cnc'd and lost a few hundreths. They would be excellent on a 598

[tcarda]

I'm putting back together my 598 and have someone who wants to trade me a set of dart big m heads for my bb2x's both sets are not ported, and the cam I'm using is 799 lift and 288 duration on a 110 c/l running alky inj. and shifting a 4 spd at 7500 crossing the stripe at 7775. I want to know if its worth trading heads or not. will the big m's make more hp?


Them big m's are actually very good heads. I had them on my 548 everyone said they were way to big, so I swapped to dart 355's cnc'd and lost a few hundreths. They would be excellent on a 598

Kinda funny you said that hammertime. When I was building my 540 I found a set of Big M heads and I had two different builders tell me that they were too big and that they would be good for either a 572+ cu in motor or a smaller supercharged motor. I bought the Dart 355 cnc heads too, ran them two seasons, and then sold them. I was not happy with 355s at all.

[hammertime]

I'm putting back together my 598 and have someone who wants to trade me a set of dart big m heads for my bb2x's both sets are not ported, and the cam I'm using is 799 lift and 288 duration on a 110 c/l running alky inj. and shifting a 4 spd at 7500 crossing the stripe at 7775. I want to know if its worth trading heads or not. will the big m's make more hp?


Them big m's are actually very good heads. I had them on my 548 everyone said they were way to big, so I swapped to dart 355's cnc'd and lost a few hundreths. They would be excellent on a 598

Kinda funny you said that hammertime. When I was building my 540 I found a set of Big M heads and I had two different builders tell me that they were too big and that they would be good for either a 572+ cu in motor or a smaller supercharged motor. I bought the Dart 355 cnc heads too, ran them two seasons, and then sold them. I was not happy with 355s at all.

Myself either, I thought they were a poor head for how much they are talked up. My big m's were took to a local head porter he really liked them on his flow bench, said they were one of the best conv heads he had seen (3-4 years ago)

[TheRabbit]

Them big m's are actually very good heads. I had them on my 548 everyone said they were way to big, so I swapped to dart 355's cnc'd and lost a few hundreths. They would be excellent on a 598

Kinda funny you said that hammertime. When I was building my 540 I found a set of Big M heads and I had two different builders tell me that they were too big and that they would be good for either a 572+ cu in motor or a smaller supercharged motor. I bought the Dart 355 cnc heads too, ran them two seasons, and then sold them. I was not happy with 355s at all.

Are you guys crazy?? Lol . I would have traded you 2 sets of 355's for big M's. and been happy! What else do yall have to trade? lol.

Use the M's or better yet call Race Flow Development and have Curtis build you a set of Edelbrock BBC heads! :wink:

[tcarda]

Them big m's are actually very good heads. I had them on my 548 everyone said they were way to big, so I swapped to dart 355's cnc'd and lost a few hundreths. They would be excellent on a 598

Kinda funny you said that hammertime. When I was building my 540 I found a set of Big M heads and I had two different builders tell me that they were too big and that they would be good for either a 572+ cu in motor or a smaller supercharged motor. I bought the Dart 355 cnc heads too, ran them two seasons, and then sold them. I was not happy with 355s at all.

Are you guys crazy?? Lol . I would have traded you 2 sets of 355's for big M's. and been happy! What else do yall have to trade? lol.

Use the M's or better yet call Race Flow Development and have Curtis build you a set of Edelbrock BBC heads! :wink:

X2!! That is exactly what I did! The flow numbers are awesome from the RFD Edelbrock heads and they are cheaper than a set of Dart 355 CNC Pro 1 heads. Curtis will treat you right and he will answer any questions you have. I can't say enough good things about him. My only problem is finding an intake that will flow what the heads do. I have a Reher-Morrison CNC Super Victor.....and I don't think thats not good enough for my application. Anyone have any ideas?

[TheRabbit]

U would have been better off with a Sniper intake.

[tcarda]

I have not bought anything yet, but I am looking. I had the Super victor on my 540 with the Dart 355s and I believe that one is sold. Basically I am updgrading everything along with the Edelbrock heads. The carb is Pro-Systems 1600 cfm.

[TheRabbit]

I don't know squat about Small Blocks but trust me on BBC.
http://www.profilerperformance.com/bbc-singleplaneintake-206.html

If you really want to make some big hp with a big inch motor call my buddy Steve Vance Racing Engines. He will put you in the Winners Circle and all the others in the Whinners Circle!! Tell him I sent you!!

Steve Vance
Concord, NC 28027
ph: 704-701-4235
[email protected]

[tcarda]

Thanks for the info Rabbit. Did Steve do your 632?

My engine will be a 532 cu in BBC with RFD's Victor heads and Pro Systems carb on a Super Stock Pulling Truck. I know where I want my H.P. to be, but I need the right combination to get it there.

[TheRabbit]

Steve did build my 632. There is no way I could have built it the way we did without his help. I was just going to build a plan jane 632 with a vaccum pump. When we were done I ended up with a maxed out 632 with nothing and I mean nothing else to be done to it. I was tired of every other year going into my motors and add this or do that, so with his help we built my 632 1 time and it is freeking amazing what it can do!
Put it this way I race against plenty of other 630+ Fords and Chevys that have dominated Mud racing in my area for years. With Steves motor I've beating them by a full 2 almost 3 tenths in the last 2 races. And we only run 200'!! No kidding the guys can't figure out what I've done. Also think about this. I had a 548 that I had over 20k in. It was a good little motor, but my SVRE motor is 5 tenths faster in 200'!! I'm not kiding at all. I use to run 3.540's @ 58 mph and I turned a 3.014 @ 72.54 mph last weekend and that is only off of the foot brake. My 60' times alone are 2 tenth's faster off of the foot brake than the 548 was with trans brake at 5,000.

Not to mention Steve has become a good friend since we met and he is always there to help or answer my stupid questions. After ever race I text or call him because he wants to know how we did!
Sorry, didn't mean to go on so long, but I could never thank him enough for what he's done for me!

http://i163.photobucket.com/albums/t288/rabbit548/DSCF6298.jpg