How much would just putting AFR 195cc heads onto a stock 350 add, compared to stock heads? Also does anyone know the price for these heads(bare) i cant find anyone that sells them online without calling?

A total waste of money, IMHO. They are overkill for a stock motor. The edelbrock heads assembled would be much better. The AFR's are about $800 bare.

Mike

ok, but would it be like 50hp? 70hp? more?

i`m sure it would make a little more hp but probably less torque because they flow too much for a stock motor. i would`nt use them on a stock motor at all.

well i was just wondering the number, itll have edelbrock performer intake, 750 holley dp, headers, and either a comp cams magnum or xtreme cam.

Ah, you never mentioned intake/carb/header/cam swap to go with it.

For the 195cc heads, you might want an RPM intake instead. 750 DP might be overkill on a 350, 650DP might do it. 1 5/8 headers?

To pick the right cam, you have to know what is stock as far as pistons/heads are concerned.

When you say stock 350, are you talking stock LT1 (1970-71)? stock smogger 8.5:1 compression? stock 9.5:1 roller block?

Or stock for you 71 Malibu? Which heads do you have? Old 60s/early 70s performance 64-67cc heads? Early 70s small-valved 70cc heads? or Smogger era 76cc+ heads?

You need to know what you're starting with, especially CR/heads wise to know how much the cam/head/induction/exhaust upgrade will do.

Looks like in 1971 you have 350s ranging from 110hp-330hp.

I'd venture to say the 330HP and 270HP have similar internals and probably different cam/heads. But I don't know.

the 245-255HP engines look like they might be similar, one having a 2bbl and the other a 4bbl. These probably still have decent parts to start with.

The 110-200HP are probably, dish piston versions and probably wouln't match up with the speed parts.

If you have your original engine, remove your alternator and look at the "pad" that sticks out in front/below the passenger head. It should have a series of numbers and then three letters. The letters should match the ones on this link.

http://chevelles.com/years/71/71codes.htm

The malibu has a 245hp 2bbl stock 350, the heads are stock with 74cc

The 68cc version would bump your CR close to 9:1.

To take advantage of the AFR flow capabilities, you're going to need to swap cams also. I don't really know much about matching cams to CR but as far as the XE line goes, the XE262 and XE268 is what people have been using w/ Vortec swap. The 270H is old technology and might be too big.

Best bet would be to call Comp Cams and ask them for their recommendation on a 9:1CR 350ci, AFR195, headers/RPM intake, etc.

(Might want to call Crane, Isky, Lunati, etc also)

Originally posted by Brian71malibu:
How much would just putting AFR 195cc heads onto a stock 350 add, compared to stock heads? Also does anyone know the price for these heads(bare) i cant find anyone that sells them online without calling? Brian,
That's because you do not want to buy AFR heads bare.
They come unfinished in bare form & would cost you a lot more to have done than you can buy the complete heads for & unless it is a very good head porter you would likely end up with an inferior head.
For a mild 350 you want the AFR 180 not the 195, they will work much better.
No one can honestly give you a HP improvement number for your engine by bolting on parts but I can tell you other than the Brodix RR series the AFR's are in my opinion about the best out of the box head out there in complete form.

All that said, you are not going to realize anywhere near the potential of the heads with a stock low compression engine if that is what you have.
As has been posted you need to know what you are starting with before throwing parts at it :D

Out of curiosity, Why are you looking for bare heads?

If you are still interested in pricing on AFR heads send me an email.
I have pretty fair pricing on them ;)

Mike beat me to the post I was going to suggest calling him. I bought my afr195's from him and they work real well

graemlins/clonk.gif doulble post

If you add a decent cam,intake,and carb with the 195s or 180s your going to get well over 100 more hp. I went from mild ported double humps, 186 casting, much better than you have now, to AFR 220s and went 1 second quicker. 12.50s to 11.50s

Well, if you insist on using your $1500-2000(i'm guessing, have no idea what they cost) on these heads.....

I would go with these cams from Comp.

12-262-4
or
12-242-2

Those are the grind numbers. Go here to get all the specs:http://compcams.com/Technical/Search/

Comp recommends the 260H and 270H to replace the cam on the 9:1 CR engine of 1971. The two above are newer technology and fall between the lift numbers of the older cams and will probably make more power.

All that said, I'd go the Vortec route if I were you. They would give you an extre half point of CR over the AFRs, compatible with the 262H(12-238-2) and you could probably pay for the whole swap for the price of just the AFR heads.

I was looking for bare heads because i was going to buy the kits that come with all the valvetrain components and put those onto the afrs. When i get more money im going to be putting a 355 or 383 shortblock into my car and throw the afrs onto it, so i decided to use the afrs until i can buy a shortblock.

Originally posted by turbo:
Mike beat me to the post I was going to suggest calling him. I bought my afr195's from him and they work real well =
Thanks Jim graemlins/beers.gif
Glad I could help.

Well, you didn't say anything about the 383 in the future. In that case, the AFR's would show their worth with the extra cubes and cam to match. graemlins/thumbsup.gif