bowtie 034 head potential

[Carnut1]

IMG_20130416_195348_648.jpgScreenshot_2018-04-21-11-33-25.pngTop, 90's ported 034's 2.055/1.6 about 200cc runner 282cfm 209cfm. Ran good in a street 383 hr cam 7000rpm limit.
Bottom, screenshot from Stan's website. Larry gets 317cfm/225cfm with a 223cc runner. 2.085/1.58 valves.
Potential is there but they need porting. Thanks, Charlie

can you get me pics of the ports? My brother and I work in a iron foundry and we used to grind parts to match pics within .005 in spec so i'm confident we could do a set of heads. Actually if you could get pics of a ported set of 882's 624's or 461's thatd be great. considering we have cracked heads that we chould practice n before hand.

1217170951.jpg

I am not 100% sure what you would like me to do. Buried in storage I have ported 882's, 461's and bowtie 034's. You need me to dig these up and post pictures of them to cast new heads? Save me some work and copy Larry's 461's they kick ass. Thanks, Charlie

[user-30257]

I'm not bound by any rules other than they have to be cast iron. The reason I was saying that they are stock ports is because they are currently stock and I have never ported a set of heads before. Also, they have stock valves in them and my machinist no longer does machine work so they will most likely stay that way as the other machinist in the area don't do well with racecar stuff. That and the people that do porting near me charge more than a new set of heads. So the valves, ports, and valve job will most likely stay as they are.

They should charge more than a new set of heads. People think this work should be free. Most guys that attempt it give up after an hour. Then realise they did nothing and have no problem paying what's required t get the job done.

That being said, a ported set of heads tailored to your engine will make more power than a basic off the shelf casting.

Like button!

Yes! I got a like! thanks

[tt 383]

Not sure exactly where this thread is going but I have too ask since stock/bowtie vortecs were brought up, has anyone here played with the updated version of the large port bowtie vortec head? Supposedly 280+ at .600 as cast and was just wondering what the limits are compared to the 034 heads.

[phantomfab]

IMG_20130416_195348_648.jpgScreenshot_2018-04-21-11-33-25.pngTop, 90's ported 034's 2.055/1.6 about 200cc runner 282cfm 209cfm. Ran good in a street 383 hr cam 7000rpm limit.
Bottom, screenshot from Stan's website. Larry gets 317cfm/225cfm with a 223cc runner. 2.085/1.58 valves.
Potential is there but they need porting. Thanks, Charlie

can you get me pics of the ports? My brother and I work in a iron foundry and we used to grind parts to match pics within .005 in spec so i'm confident we could do a set of heads. Actually if you could get pics of a ported set of 882's 624's or 461's thatd be great. considering we have cracked heads that we chould practice n before hand.

1217170951.jpg
I am not 100% sure what you would like me to do. Buried in storage I have ported 882's, 461's and bowtie 034's. You need me to dig these up and post pictures of them to cast new heads? Save me some work and copy Larry's 461's they kick ass. Thanks, Charlie

Lol no I'm not wanting to cast new heads. I was wanting pictures of the ports after being ported. And I'm the bowl area. I was saying I believe if I had a picture I could copy the work. As both my brother and I have experience doing just that. In finish we ground cast iron parts for over 40 hours a week. There we had to match spec within .005. Also gave a lot of experience using carbide bits for smaller areas. We just coincidently have all the cutters needed for porting heads. Just we don't have the experience of actually grinding a set of heads. And in an hour I'm confident a water jacket wouldn't be hit by then saying nothing had been done in an hour. That was actually one of the reason we never done it is we were afraid of scrapping a set of heads by not knowing what were doing. And doing to much in the wrong places.

[phantomfab]

Are the ports of the 461 the same as the bowtie? Wondering just why they were brought up? I was just wanting pictures of them or the 882's as such to practice porting. I would also like pics of a set of ported 034's that worked well to copy. Thank you. But without porting them what kind of potential do they have power wise? That was kind of the purpose of the post to begin with.

[Carnut1]

Are the ports of the 461 the same as the bowtie? Wondering just why they were brought up? I was just wanting pictures of them or the 882's as such to practice porting. I would also like pics of a set of ported 034's that worked well to copy. Thank you. But without porting them what kind of potential do they have power wise? That was kind of the purpose of the post to begin with.

461's are much smaller intake port than bowties untouched.

[maxracesoftware]

by phantomfab » Sun Apr 22, 2018 7:09 pm
I was wanting pictures of the ports after being ported.
And I'm the bowl area.
I was saying I believe if I had a picture I could copy the work.

[maxracesoftware]

[maxracesoftware]

[phantomfab]

man those pics are awesome. I just have one question and that is if you could possibly take a picture from the intake port looking into the bowl. Such as if the head were to being laying chamber down and taking a picture from where the intake would be setting. Thank you.

[maxracesoftware]

man those pics are awesome. I just have one question and that is if you could possibly take a picture from the intake port looking into the bowl. Such as if the head were to being laying chamber down and taking a picture from where the intake would be setting. Thank you.

those exact Heads are long gone , they were on a Nostalgia Front engine Dragster
now that same Racer is running a new engine combo in A/ND Dragster

here's an exact sectioned replica of those #034 cast-iron Bowtie Pics above ( 1st design Bowtie #034's )
just look at the shapes + where all the thin spots are like Pushrod Holes + HeadBolt Holes

[mag2555]

And that was at 223 CCs with no welding from the stock 184?

[Rosenbluth]

I have a set of those heads. I hade them on a circle track car for quiet a few years. They was the phase 2 with a 2.08 valve. They had some shade tree porting done, but nothing that looked like it was from a head shop. Backyard porting, not done by me. I was going to use them on the Chevelle I had, but decided to go BBC. My plan was to smooth out the port work, clean it up, then get them flowed, either by someone with a bench, or build my own. I had them on a 406. 13:1. 260/268 .623/.644 on a 102LCA Soild Roller. Holley Strip Dom intake. 850 dbl pumper. Stock crank and rods. Pistons were TRW Powerforged. Really was nothing special, but it ran quiet well. Never turned over 6500 rpm. Was a torque monster coming off the corner. The heads, intake, and cam with roller lifters were all given to me to be used. I had the short block in a street stock, so I really didn't have much money in it at all.

You can do some reading, and pick up the basics to porting and go in and clean them up some. Flashing and the short turn. It doesn't take all that much to make some gains. I'm guessing we were in the 550hp range as my motor was. I'd think you should/could be close to the 500 if the parts are matched correctly. But I'm no expert engine builder.

[phantomfab]

Thanks for the replies everyone. And I am expecially thanful for the cutouts of the head. Those thin spots are actually the exact reason i've always been afraid to port a useable set of heads. I was always afraid of those thin spots becoming holes. Now I have a question that is somewhat on the topic but off on a rabbit trail at the same time.

What is the rpm limit on a stock valve? Either a just smog head valve or the ones in the bowties? I was assuming they werent anything too special other than I believe they are longer. Thats one thing I was always afraid of was dropping a valve. Even though I have turned a cheap set of single piece stainless valves from summit to 8200 and the engine still runs today. But that was one night at a track I was geared way too low for.