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SMALL BLOCK HEADS

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Post  foxbigblock September 29th 2012, 9:29 am

Im not extremely familiar with small block fords and was wondering what is a great and well worth priced aluminum head for an306 mid 70's block?

Nate
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Post  dfree383 September 29th 2012, 9:38 am

what are you doing with it?
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Post  foxbigblock September 29th 2012, 10:06 am

Street/strip...as much hp as practicle
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Post  dfree383 September 29th 2012, 10:09 am

whats the rest of the combo? How fast you plan on going? I'm assuming ita a N/A motor?

How much compression? Why are you limiting yourself to 306" ?
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Post  foxbigblock September 29th 2012, 10:15 am

dfree383 wrote:whats the rest of the combo? How fast you plan on going? I'm assuming ita a N/A motor?

How much compression? Why are you limiting yourself to 306" ?

89 notch. Stripped. 4.11 8.8 rear. Motor is a 306 with roughly 12.5 compression. 650 dp holley. Victor intake. Electric water pump and fan. How fast? As fast as possible on a regular basis without splitting block. I bought the car without much info and it isnt in my garage at the moment so there are some things I cant identify yet. Car should cert to 8.5. C4 transmission but it will need to be modded. Foot brake car. Has nitrous hook ups but no bottle. Pistons are kb hyper AND i don't want to split block so nitrous isnt an option. No cam card Rolling Eyes but its a healthy solid flat tappet
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Post  dfree383 September 29th 2012, 10:24 am

a 306" for a street strip car, I'd look at something like a AFR 185, TFS 195 or similar. Dart has a couple of nice aluminum heads too.

Its real easy to get to big of heads on a NA small motor.

IMO if you stroke it to 347 your options open up.
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Post  foxbigblock September 29th 2012, 10:33 am

dfree383 wrote:a 306" for a street strip car, I'd look at something like a AFR 185, TFS 195 or similar. Dart has a couple of nice aluminum heads too.

Its real easy to get to big of heads on a NA small motor.

IMO if you stroke it to 347 your options open up.

Okay thanks. My main money is going into the big block car, but i figured the sb deserved better than iron heads. I don't want too big of heads for sure. 3k stall or so. I think heads on it now are E7's? That sound right? Sorry im small block ignorant. Not like my c8, c9, doove nomenclature
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Post  dfree383 September 29th 2012, 10:37 am

Those two will blow a set of factory Iron heads out of the water.
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Post  foxbigblock September 29th 2012, 10:50 am

dfree383 wrote:Those two will blow a set of factory Iron heads out of the water.

Are there any geometry or valve issues with the afr or tfs heads like the kaase big block heads? If I had to change pistons id stroke to a 347.
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Post  jasonf September 29th 2012, 11:21 am

My AFR 185's required a small notch to clear the valves with a comp XE282HR cam. Par for the course when you have the biggest off the shelf cam that was available at the time. That was an 89 5.0l IIRC. Other than that I have not had a problem with them and they are 11-12 years old.
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Post  richter69 September 29th 2012, 11:23 am

our world products iron head 306 made 534 hp na, now this was on methanol, and not real street friendly.

we did another 306, stock 5.0 block and crank, scat i beam rods, kb hyper pistons, 13-1, .600 max lift solid roller, out of the box 205 afrs w a supervictor intake, made 551 on alky na on turning it 7000 due to the stock block.

we ran 11.0's 10.90's with a flat tapped 306, bone stock 5.0 bottom w kb hypers, and some ported 351 windsor heads back in the day at 2950 pounds..... on alky of course lol. on gas it ran 11.20's
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Post  richter69 September 29th 2012, 11:29 am

the afr heads have the valves closer to the deck, we had piston to valve clearance issues w the je pistons we had, so rather than buy new pistons we stuck the world products heads on the the first motor.

the 2nd motor was a bastard we made from a bunch of parts lying around and had to cut the hypers to get the pv to work with the low lift cam and afr's.........the afr has shit for spring package so plan on changing those also, and we did the valves also as they have issues..... good casting though lol.

hell the afr head motor is for sale......... Wink
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Post  foxbigblock September 29th 2012, 12:18 pm

richter69 wrote:the afr heads have the valves closer to the deck, we had piston to valve clearance issues w the je pistons we had, so rather than buy new pistons we stuck the world products heads on the the first motor.

the 2nd motor was a bastard we made from a bunch of parts lying around and had to cut the hypers to get the pv to work with the low lift cam and afr's.........the afr has shit for spring package so plan on changing those also, and we did the valves also as they have issues..... good casting though lol.

hell the afr head motor is for sale......... Wink

Lol well like i stated before the major money goes to the big block car....which incidentally is not nearly as set up as the sb car and has a full interior and 4 point cage. My understanding is that the stock sb bottom end and decent top end parts will easily surpass the block
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Post  richter69 September 29th 2012, 12:21 pm

yes it will, our old windsor head motor split 2 5.0 blocks over time.
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Post  foxbigblock September 29th 2012, 2:36 pm

richter69 wrote:yes it will, our old windsor head motor split 2 5.0 blocks over time.

Then i will enjoy it until it splits
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Post  richter69 September 29th 2012, 2:52 pm

hear that, it wont make a huge mess when it does..........run it!
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Post  richter69 September 29th 2012, 2:54 pm

hear that, it wont make a huge mess when it does..........run it!
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Post  mtacqua September 30th 2012, 12:47 pm

I'd look on the corral for a set of used AFRs of TFS heads; I see good deals there all the time. I sold my HP 225's for about 2/3 of new.
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Post  bb429power September 30th 2012, 10:25 pm

richter69 wrote:hear that, it wont make a huge mess when it does..........run it!
So other than tearing it apart, what would indicate to you that it split internally? Because I'm using a 5.0 block and I want to know what to look out for. Smile
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Post  richter69 September 30th 2012, 11:07 pm

lower than norm or fluctuating oil press, water coming out the header lol
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Post  bb429power September 30th 2012, 11:18 pm

richter69 wrote:lower than norm or fluctuating oil press, water coming out the header lol
Got it Laughing
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Post  bbf-falcon October 1st 2012, 12:00 am

Justin,I would'nt be too concerned w/splitting the block unless it's a all out race engine. They will take a pretty good beating until you start making lots of HP. Very Happy

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Post  bb429power October 1st 2012, 12:03 am

bbf-falcon wrote:Justin,I would'nt be too concerned w/splitting the block unless it's a all out race engine. They will take a pretty good beating until you start making lots of HP. Very Happy
My only worries were with the rpm's, we'll see how it turns out. Hopefully it all works well Smile
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Post  dfree383 October 1st 2012, 1:50 am

bb429power wrote:
bbf-falcon wrote:Justin,I would'nt be too concerned w/splitting the block unless it's a all out race engine. They will take a pretty good beating until you start making lots of HP. Very Happy
My only worries were with the rpm's, we'll see how it turns out. Hopefully it all works well Smile

N/A stuff is a little easier on them than the NO2 and Blowers.

Just keep the RPM at a reasonable level and it will work.
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Post  richter69 October 1st 2012, 8:10 am

our first block we split was an factory iron head, flat tappet low compression non race n/a motor never turned over 6600...... it did have a lot of runs on it though.......... Wink
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