Brodix 18X heads???

R&S Motorsports · 12-09-2008, 12:38 AM

I am in the process of building a new motor and I am looking at the 18 degree Brodix 18X heads SBC. Has anyone had any experience with these? Difference between 23 degree and these or mabye something else completely. The short block will be a 441 SBC havent bought any components yet other than the block so open to suggestions. Let me know what you think

63corvette · 12-09-2008, 02:08 PM

I used the 23 degree heads with a Ron's Porting Job on them on a 434 a few years ago.
They worked well and flowed better than the Brodix CNC BBC heads.
I had to pull the hood many times to prove the car had a small block and not a big block.
The 434 made almost 850 HP on the dyno and was very reliable with a dart block.
Same combo with a GM block not so reliable. I don't know what the difference in the blocks are but the Dart was much better and a little heavier.
Good Luck with your combo.
My 2 Cents

Jason Oldfield · 12-09-2008, 05:20 PM

I've heard very good things about these heads, and considered putting them on my 383 cid small block. But, I was advised against it since that motor only has a stock cast iron 4-bolt block, which wasn't really made to take 750+ hp, which is easily attainable with those heads. The cost difference to put together a motor using those 18° heads vs. a set of standard 23° heads is minimal. So, if you have the block and other components that can take the extra power, I'd go with them.

Good luck, and let us know which direction you go...

Rich Biebel · 12-09-2008, 08:25 PM

A friend of mine built a 420 using those heads. It made about 740 hp with a t-ram and 2 alcohol carbs. Not a real impressive number by any means. His car weighs close to 3000lbs and has run 9.20's at 143-144 after just a few runs. His best previous numbers were in the 9.50's at about140 using AFR 23 degree heads. The 18x's were not a huge improvement over the 23 degree stuff he had before when you take into consideration the added engine size. There are some very good 23 degree heads out there and probably run as well or better.......

luckydog · 12-09-2008, 09:25 PM

Quote:

Originally Posted by Rich Biebel

There are some very good 23 degree heads out there and probably run as well or better.......

Such as.................
I'm also considering purchasing the 18X and would like some more information on this topic.

R&S Motorsports · 12-09-2008, 10:50 PM

Thanks for the responses guys. I am going to talk to Brodix at the PRI show this weekend but I always like to hear things from the real racer that have had experience with the product, I have learned through the years that the manufactures sometimes will tell you anything you want to hear! I will post any more info I get on them during the PRI show but I am pretty sure that these are the one I am going to go with. Everything I have heard about these has been great as long as you use a aftermarket block.

Jeff Brandenburg · 12-19-2008, 04:32 PM

I have a set of 18X's on a 406 with a small .704/.704 277/284@.050 cam...motor made 681 on a really conservative dyno. Pushes our 2280lb Monza to a best 5.59's at 124mph using a 1050 Pro Systems gas carb

12-09-2008, 12:38 AM	#1
R&S Motorsports Junior Member Join Date: Oct 2008 Location: Wind Lake, WI Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Brodix 18X heads??? I am in the process of building a new motor and I am looking at the 18 degree Brodix 18X heads SBC. Has anyone had any experience with these? Difference between 23 degree and these or mabye something else completely. The short block will be a 441 SBC havent bought any components yet other than the block so open to suggestions. Let me know what you think

12-09-2008, 02:08 PM	#2
63corvette Senior Member Join Date: Mar 2007 Location: Canyon, Tx Posts: 554 Likes: 128 Liked 361 Times in 104 Posts	Re: Brodix 18X heads??? I used the 23 degree heads with a Ron's Porting Job on them on a 434 a few years ago. They worked well and flowed better than the Brodix CNC BBC heads. I had to pull the hood many times to prove the car had a small block and not a big block. The 434 made almost 850 HP on the dyno and was very reliable with a dart block. Same combo with a GM block not so reliable. I don't know what the difference in the blocks are but the Dart was much better and a little heavier. Good Luck with your combo. My 2 Cents

12-09-2008, 05:20 PM	#3
Jason Oldfield Senior Member Join Date: Jun 2007 Location: Rochester, NY Posts: 619 Likes: 1 Liked 10 Times in 4 Posts	Re: Brodix 18X heads??? I've heard very good things about these heads, and considered putting them on my 383 cid small block. But, I was advised against it since that motor only has a stock cast iron 4-bolt block, which wasn't really made to take 750+ hp, which is easily attainable with those heads. The cost difference to put together a motor using those 18° heads vs. a set of standard 23° heads is minimal. So, if you have the block and other components that can take the extra power, I'd go with them. Good luck, and let us know which direction you go... __________________ Jason Oldfield S/G & S/St 1838

12-09-2008, 08:25 PM	#4
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,320 Likes: 25 Liked 552 Times in 215 Posts	Re: Brodix 18X heads??? A friend of mine built a 420 using those heads. It made about 740 hp with a t-ram and 2 alcohol carbs. Not a real impressive number by any means. His car weighs close to 3000lbs and has run 9.20's at 143-144 after just a few runs. His best previous numbers were in the 9.50's at about140 using AFR 23 degree heads. The 18x's were not a huge improvement over the 23 degree stuff he had before when you take into consideration the added engine size. There are some very good 23 degree heads out there and probably run as well or better....... __________________ Rich Biebel S/C 1479 Stock 147R

12-09-2008, 10:50 PM	#6
R&S Motorsports Junior Member Join Date: Oct 2008 Location: Wind Lake, WI Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: Brodix 18X heads??? Thanks for the responses guys. I am going to talk to Brodix at the PRI show this weekend but I always like to hear things from the real racer that have had experience with the product, I have learned through the years that the manufactures sometimes will tell you anything you want to hear! I will post any more info I get on them during the PRI show but I am pretty sure that these are the one I am going to go with. Everything I have heard about these has been great as long as you use a aftermarket block.

12-19-2008, 04:32 PM	#7
Jeff Brandenburg Junior Member Join Date: Jan 2008 Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: Brodix 18X heads??? I have a set of 18X's on a 406 with a small .704/.704 277/284@.050 cam...motor made 681 on a really conservative dyno. Pushes our 2280lb Monza to a best 5.59's at 124mph using a 1050 Pro Systems gas carb