BIG BRODIES???? WHAT DO YOU THINK??
 

Ive recently just brought a set of Bodix BB-2 Xtra Big Brodie heads.I would like to know what you guys think of them and how well they have flowd in the past.They are going to be run on a 632 Chev 15.5 roller motor N/A.They will be tickled up when i get them but i just want to know what you guys think?????

It has been confirmed over and over that Brodix heads do not flow out of the box what Brodix claims.

Not very many conventional heads that will work ok with that size motor, Dart 380 & 410 and BMF 405's would be my choice. They will work but just wont work as well as other. IMO them heads should be on a 496-565

Isnt that most heads :lol: flow #'s look good on paper dont they :D

I with Hammer those heads would be peanut ports on a 632! Even with some serious massaging they still wouldn't flow no where near what that motor would require.
I was thinking of going with some bb2x's on my 496ci motor which would have been just about perfect, but found a deal on some merlin vr345's instead.
I've alwasy heard that you can race dyno's or flow benches either.

Charles

Heads
 

Don't WASTE your time, or $$$ on those heads for that C.I. and C/R At best fully ported you will see 400 to 420 CFM. You need a head that will flow 470 CFM to make your short block start to work!

You have entered the world of 18, 14, and 11, degree heads. Shaft rockers, sheet metal intakes, and carbs that flow 1350 + CFM. Lots of $$$ and maintanance to make it run. This is what it takes to get the H.P. #s from this kind of C.I.

Do your motor a favor and SELL those heads! They are not made for that kind of C.I. Yes they will work, but not worth putting on!

What cam, intake, and carb are you planning on putting on this short block?

Its really NOT the flow number that is the key here. Its the cross section. 420 cfm will make 1000+HP, in the correct application. Basicaly, on a 632, that head can't be made to big. Regardless if the you pick up flow or not, it will make more hp the bigger you make it. Will the engine make as much power as it could with something else, no, but even a true 950hp is a pretty brutal amount of power. Its funny how guys that have never expierinced even 500hp, will tell other guys how 950hp is weak for some given parts.

If I am not mistaken, these are the 365cc 26 degree heads correct? With a 2.325-2.350 intake valve, some serious hogging, those heads could make 1000hp on a 632, or close to it. How much power you looking to make? Are there better heads to start with, absolutely, but, that head can be made to work if you have them, and, are not going heads up racing, and are trying to dominate a certain class, then, no, that wouldn;t be the head to run, but, if this is a bracket car, or something similiar, then, they can make a lot of power.

Frank
Advanced Performance
www.get-ap.com

Heads
 

Frank

Brodix advertises this head to only a 548 C.I. motor with that bore and a C/R of 13.0 to 15.0 They are a 26 degree head 365 CC with a 2.30 INT. and a 1.88 EXH. valve.

I understand the cross section and flow #s of heads. I guess if you had a 15.5 C/R 632 Why would you leave a 100 + HP on the table with a sub standard head for this application? For resale value most people would not even look at a 632 with this head on it.

I have a 540 with this head on it. I spent many hours porting them. Then they went to the engine builder. He spent another $600.00 of my money to finish them and CC them. He changed the chamber design, they now look like Darts chambers. On the dyno they did produce 830 HP with a 14.0 C/R This is a bracket car done by Gebhardts

Just finished a 665 C/I for my Tommy Muaney Chevelle 1294 HP and 1002 FT#s of torque PB 1801s done by Sonnys 15.3 C/R Yes, I left some on the table due to my cam choice. I wanted to stay below .900 lift. N/A with 2 1320 CFM Doms on a CFE sheet metal intake.

I don't dispute what your telling him! Becuase this is what you do for a living. Not knowing the rest of this combo? Intake, cam, carb, and chassis maybe this is a good starting point for him. Your right 950 HP can cause more than enough problems for most people!

X2..... :D

B JUICE What heads are on your 632?

14 degree Big chief. :wink:

http://i237.photobucket.com/albums/f...1XKCKCA7-1.jpg


AARRR AARRR AARRR ARRR!!!!!!!!!!

my cam is 700 lift would you recommend bigger?i am running a Tunnel ram Enderle bug catcher direct port mechanical alcahol injection.80A belt drive pump.2 1/4 headers into 4 inch collecters(38 inch primeries).1.7 Crane gold roller rockers.Lunati roller lifters.1.625 triple valve springs.Ohio internal balance crank.Ohio h beam rods.Msd Crank trigger.You can see the motor in the car in my racing junk profile.The car is a backhalved 68 Holden Monaro.1250Kg Bracket car.All your in put is much appreciated.Ive been told the BB2 Xtra's will flow around 450CFM after they have finished with them which they said will be fine for what im running.I dont really have a Horspower figure in mind just what ever my combo will make.

Would BB-5's be better without going to PB1800 Big Duke series

The Magic words,
It's bracket car, weighing 2700 lbs. and appearently on alcohol, IMO the heads are way too small for the most performance out of a 632" motor, but if you already have the heads and intake combo, i would use them unless you have unlimited funds or you are trying to be king of the hill.

__________________________________________________ ___________

I just put together a 476" motor with Brobix 2 plus heads @ 13 to 1 it ran 10.401 @ 128 mph in a 3700 lb car on the 5th pass down the track. The heads are fully ported and on gas 1050 dom.
The cam i think is way too small, the cam i used was a .722 lift. I think you need to be around .760/.780 if you have the converter to handle it.

Kinda funny you mention Holden, i have an Austrailan friend living in Michigan (USA) who has a 1969 holden, who i have sold and bought a few parts from. The car is kind of a cross between a Nova and a Pontiac, but totally different.

JMO

Zip.

What do you mean by apparently.If i wasnt running alcahol i would tell you otherwise so i could get the best out of my application.This is my first Methanol car so im new to it all and would like your opinion not criticism.
Thanks.Have a look on my racing junk profile at the Monaro if you wish.

I don't think he was criticizing you at all. Not sure what he ment by apparently but I would bet the farm he meant nothing negative by it at all...he isn't like that from what I have seen on here....always give good knowledgeable advice.

WOO,WOO, my friend, i only assumed you're running alcohol because of the bird catcher. I meant no criticisium, Jesus i've been running alcohol for ever. We run 3 cars & 2 rails on alcohol the cars run in the 5's and the rails run in the 4's, i only meant to offer advice as my own experience. I also have a blown S/BLK. alcohol motor that's been 4.60's @ 2600lbs. My first blown car was 44 yrs. ago which set a world record 42 yrs. ago. My fastest car ran 6.71 @ 217mph 20 yrs. ago.
I now go a little slower, but i'm building a S/BLK 1471 blown alcohol 48 Anglia that should dip into the 4's.
Again i appolagize if you mis understood my post, it was not to be accepted as negative of your setup.

With that said i'll bail out with further advice or comment on this post, i donot want to make enemies, nor do i ever want to be accused of critising someone for what they have or trying to run with their setup.

With that said here is my 358" that went 4.60's @ 2600lbs, don't worry about the smoke it's just a valve cover leak.
And yes i wish you the very best luck and i hope you run as good as you want too, your friend :)

Zip.

PS, Tod74 you know you're right i have never critised anyone and will never do that.

I'm behind the camera on this vid, my motor is in my friends car Jeff Russell's ugly Dodge @ 2600 lbs.

http://video.google.com/videoplay?do...24568453485455

Thanks mate and good luck with the sml/Blk.

Ps nice video

In the conventional head world you need them heads I suggest or a big duke.. you could really upgrade them by going to a 3x head instead of 2x. You are very limited by that head and will loose a lot of power with them 450cfm may not be out of the question on certain flow benchs but on a good honest one I just dont see it. Still should make a 1000hp though lot of cubes with plenty of compression.

too small
 

Those heads aren't even close for a 632", ..

the valve angle, chamber, portshape all make that a good head
for something 540" or smaller, .. but won't even come close
to hanging with current technology heads for big inch engines, ..

doubt you'd make close to 1000hp with them, .

Fully ported on my honest flow bench that head will flow about
430 cfm @ .9", .. FULLY ported with a 50* VJ, ..

I'm not really a fan of the Brodix oval ports unless you choose the largest
on they make, .. reason is the oval opening drives airspeed too
high, it's like using a head that's too small.

Curtis

Can you get air speed too high.I thought velocity was as or more important than cfm???Enlighten me,please.

With the Big Duke heads can i use my existing tall deck intake manifold my my original pistons.

No you can not

big dukes are a 18 degree head

The point was, he has these heads. He plans on running them. Everyone is so quick to junk what they have, to buy something else, when what they have will work, for what they are trying to do. Are those heads right for a 632, no, I already said that, IF your trying to make the most power possible, or go heads up racing. But, with a bit of work, will make a lot of power. How much power does he want, is the real question. If he says 1000 easy hp, then no, they won;t be right, and he would be better off with something else. If he shruggs his shoulders, and says, what ever it will make, then, they will work, and, he already has them. Not every guy on the planet is trying to be top dog. A mid 9 or low nine second bracket car, is a heck of a fun ride. That was my point. With the right cam, and compression, ported with decent, not all out port job, that combo could make 900hp. It would make brutal tq, which, could be an issue for traction, but otherwise, at 2700lbs, 900hp is easily enough to run way into the 8's. Is that fast enough?

Frank

Thanks mate that was my point.I have these heads and i wanna know how to make them work well and if they have worked well in the past.I know these are not the best heads to use for a 632 but thats all ive got to work with I am on a pretty tight budget being age 23 with a 632 Bracket car and no sponsers so every single doller that is used has to come out of my back pocket.Thanks for seeing my point.A mid to low nine will do me just fine and theres always going to be room to play with later on down the track.

How would BB-3's help me and how much better are they than BB-2's for the 632 if they were fully ported and flowed with the camber shapes changed.

IMO a lot we make over 1000hp with 565's and bb3 oval ports, 1050 on 582's

I said i was going to bail out on this thread, but FRANK, you did a better job of saying what i was trying to say. Thanks for making that post.

And jrthone
All the vehicles i mentioned run S/BLKS, and what ever your goal is it will be a fun run when it hit's the track.

Zip.

I wasnt trying to say they wont work I was trying to say they are no where near the head this motor should have...

Thanks heaps dave and good luck with your cars.and trust me evan if i can only make 800RWHP im still gonna have heaps of fun running her in.

I'll admit I'm using brodix bb-2x's without port work and the chambers are crap but my 2850 car with a stick trans goes 8.8's with a best so far of 8.79 and this was with 588 cubes. So, yeah with the right heads you could make more power but for a bracket car it is definitely in the top half of most fields.

Thats what i like to hear . Thanks mate

This is exactly what Frank was saying all along (in a general statement).......GEEEEZZZZ..

Dont Worry i got it 2 days ago Frank.


and for the record ( i will not say names) but there is a close friend of mine on this site and other sites that runs 4.90's/5.0's with a 632 and conventional heads in a 2500lb door car........(there is a little NOS invloved) but still lays it down with those heads..

jrthone i think you have the picture here..bolt it up and run the dog piss out of it...

when you decide to go heads up racing and win each race..then go for the 20,000 head,intake,valve train set up.

geeez over here i am seeing grocery getter 4 bangers winning these brackets against 5 seconds cars...thats why i will not touch bracket racing with a 10 ft pole...but if i ever did...my wife has a v-6 chevy pick-up i will go try my hand...
:roll: :D

yea mate i do have the picture.

Thanks


James Hone

Frank of Advanced performance has given some good sound advice, So has Zipper and the others here.

Let me add something for you all just in case you don't already know this. Build it for higher rpm and give it a good strong lifting cam, with approiate valve springs and watch the small head build horsepower it is not supposed to be capable of once you get the revvs up. You can trick the thing into thinking or performing better than it would be under designed conditions. A good intake manifold is important.

Ever wonder how a stock class SB Chevy or (?) can revv so high and make so much horsepower with a stock engine and limited head mods?

If you do ever contemplate buying a new set of BB Chevy Conventional Heads, in my opinion there are none finer FOR THE MONEY than the ones done by our own Curtis Boggs at Race Flow DEvelopment (RFD).
www.raceflowdevelopment.com



Ed

Just to let you guys know.I was able to swap the BB-2 Xtras for a set of New BB-3 Xtras(upgraded to 1.645 spring which is the .850" lift type) and had to pay the differance.These should be alot better that the BB-2 Xtras especially after a good port job.

Very good deal for you.. I think you wont be 2nd guessing what if now, them are good heads. It should go well into the 1000 hp mark now.

Heads
 

Good choice James, out of the box these are equal to what you would get out of the BB-2 XTRAS ported. Glad you went with the spring upgrade.

Let us know what that HOT ROD runs when you get it done!

Good luck