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HELP ME
#1
OK IT LOOKS LIKE THER ARENT MANY NEW POSTS GOING UP, SO HERE IS MINE TO SEE IF IT WILL GENERATE ANY FEED BACK../.

I HAVE A .30 OVER 460, PLAIN JANE HEADS NO OTHER MODS EXCEPT AN ALUM. INTAKE WITH NO MARKINGS AND AN AVENGER 870 CARB. I JUST BOUGHT A BIG MUTHA THUMPER CAM FROM COMP CAMS ( FLAT TAPPET HYD) SO WHAT ELSE DO I NEED TO DO JUST FOR A STREET SCREAMER ? I AM NOT LOOKING TO BE A BADASS AT THE TRACK BUT I WANT IT TO SOUND LIKE IT COULD BE. OK GUYS LET YOUR IMAGINATIONS RUN WILD.....
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#2
That's a pretty big cam for a basically stock engine. I don't know what your compression ratio is but 9.5 to 1 at least, is what is recommended for that. Also, I would recommend some head work with the correct springs, headers and a 2800-3000 rpm converter(or a 4speed).
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#3
PAPPY HAROLD;25639 Wrote:OK IT LOOKS LIKE THER ARENT MANY NEW POSTS GOING UP, SO HERE IS MINE TO SEE IF IT WILL GENERATE ANY FEED BACK../.

I HAVE A .30 OVER 460, PLAIN JANE HEADS NO OTHER MODS EXCEPT AN ALUM. INTAKE WITH NO MARKINGS AND AN AVENGER 870 CARB. I JUST BOUGHT A BIG MUTHA THUMPER CAM FROM COMP CAMS ( FLAT TAPPET HYD) SO WHAT ELSE DO I NEED TO DO JUST FOR A STREET SCREAMER ? I AM NOT LOOKING TO BE A BADASS AT THE TRACK BUT I WANT IT TO SOUND LIKE IT COULD BE. OK GUYS LET YOUR IMAGINATIONS RUN WILD.....

do you already have that 870 street avenger? i have that carb too and after i got the motor up and running and when you go to the 460 god's they bash those carbs down into the dirt. not really sure why but they say they are hard to tune and etc.

i would go with a 800 double pumper for a manual carb or a 850 VS on a automatic.

i'm making the 870 work right now though with jets, power valves, and now i'm tuning it with the pump cams when i get them in soon.
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#4
73mach1429;25649 Wrote:That's a pretty big cam for a basically stock engine. I don't know what your compression ratio is but 9.5 to 1 at least, is what is recommended for that. Also, I would recommend some head work with the correct springs, headers and a 2800-3000 rpm converter(or a 4speed).

If you have a stock pre 72 460 long block you will be fine with that cam. If you have a stock pre 72 short block with D3 heads you will be fine with that cam. If you have a stock post 71 short block with D0, C9 or C8 heads you will be fine with that cam. If you have a post 72 long block that cam will be a problem.

In any event you will want to make sure you have a straight up timing set (not a retarded emissions set), a properly curved distributor, headers, approximately 2500 stall converter if automatic trans and a 2.5" dual exhaust with some type of cross over. If auto trans use a Holley 3310 750 Vacuum secondary carb. If manual trans you can go with either vacuum secondary or double pumper.

And Pappy Harold, no offense meant but if you could turn off the caps lock it would make your posts easier to read. When you type in all caps on the internet that is interpreted as shouting.Big Grin

Give us some more info on exactly what you are working with and I am sure others will chime in.

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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#5
You are going to need some head work for sure with that cam.Not sure what year your motor is ,but your going to need adj. rocker arms , work on the exhaust ports,a little intake and exhaust bowl work,get the heads milled to get your compression up,and a set of headers.If your motor is a '73 or newer differently get an early timing chain set.The only heads you don't want are the '72 because they are open chamber.The C8,C9,D0,and D3 can be made to be good street heads.The earlier heads before '72 have the smaller chambers to help raise your comp. on a late model motor.These motors really come alive with some basic hot rodding tricks.

Jay
73 mach1
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#6
wow!! ok i'll try to hit every thing. 1 cap lock off... 2 the 870 came with the motor and i was alittle afraid because i saw it had a jet change so i put them back to factory for a starting point. the compression is suppossed to be 10.5 but i havent had it apart yet. so i'm just going by what the previous guy told me. have new springs and rockers coming to accomidate the cam. OH and the block is a 72 with 71 heads as near as i can find out, but i know the heads are not enough but have been looking for heads ever since i bought the car, i dream of p51's but keep looking for something at a bargin. NO such thing for a big block ford. O h and i do have headers but only 1-7/8 tubes.
buy the way this post may be recorded for reference and education. thanks guys
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#7
1 7/8" primary tube headers should be fine. Is the car an automatic? If yes, you will want to upgrade the converter. I would use a 2800-3000 rpm converter. What are you running for rear end gears?

Glad to see that you are going to change out the valve springs but, I think that you still want to consider cleaning up the ports at least. The exhaust ports in stock heads are not very free flowing.
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#8
For a street car you could go with ford motorsport scj heads.They are going for about 1700 and are great heads out of the box.If you want to keep your '71 iron heads,with a little work they are very good street head.If you stay with your iron heads your headers will work,alum heads are cj size exhaust ports.If you have a factory or mild cam that is pretty high compression for pump gas.You might want to double check that,but if that's right then your compression should be good with the cam you bought.If you take your heads off you might check your piston to deck height.Getting your piston as close to 0 deck height and getting your quench area for the head to piston below .05 will help with pinging.Of course this would require block work and I'm running your shop bill up.Go to this site http://www.reincarnation-automotive.com/ and if you sign up for $30 it will show you how to port your heads yourself,or you can send your heads to him and he will do them.He is a BBF guy and has done alot of flow work on all BBF heads and knows his stuff.Sorry if I ramble on ,but I love BBF's,especially in our cars.

Jay
73 mach1
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#9
Thanks guys....... The converter is a must,The specs require it so that I am covering. The springs are also a must for the cam specs. These i did research before buying the cam. My big thing now is that i'm still looking for heads before I bite the bullit and buy new. Thats why i havent bought springs already. and also going with roller rockers. It appears stock rockers would bind with that kind of lift. The car is probably a year from getting done, so I still have time to shop. The plan is to get all the body work done and paint all the jams, then install the drivetrain before final paint. That way I won't have to lay over the fender for major parts install. Even tho its going to be more street use, What do you think about oiling mods??? I hear the rear mains a vunerable.
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#10
Not sure about oil mods on a big block. I done them on my 351C.
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