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Old 05-23-2011, 09:20 PM
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I did it. 305 heads on 350

The out come is. Smokin fast. does not run out of breath at 4500 like Ive read here in the past. 5500 no problem. Stock bottom end. dished with valve reliefs, cam is 272 282 duration 442 465 lift. 1.5 rockers, edelbrock performer intake, edelbrock 600 carb. full flowmaster exhaust. no headers. accel dizzy and coil. 081 305 heads. not ported at all bone stock. removed from 305 valve guide seals and springs changed is all. this car runs real good. just wanted to put this out there.

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Old 05-23-2011, 10:11 PM
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Quote:
Originally Posted by 88 olds
The out come is. Smokin fast.
So give us some quarter mile times/speeds. Did you baseline it before the swap?
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Old 05-23-2011, 10:13 PM
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Does this mean all of us can stop using and ordering Vortec heads and all the other after market goodies? The 305 head is going to end up another legend like "350 4 bolt main" 3/4 cam" "350 Rocket" and "Vette engine" before long.
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Old 05-23-2011, 10:28 PM
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Quote:
Originally Posted by 88 olds
The out come is. Smokin fast. does not run out of breath at 4500 like Ive read here in the past. 5500 no problem. Stock bottom end. dished with valve reliefs, cam is 272 282 duration 442 465 lift. 1.5 rockers, edelbrock performer intake, edelbrock 600 carb. full flowmaster exhaust. no headers. accel dizzy and coil. 081 305 heads. not ported at all bone stock. removed from 305 valve guide seals and springs changed is all. this car runs real good. just wanted to put this out there.
Been there done that with an s10, 4.10 gears and TH400. Nothing special. Little compression boost and maybe 8 to 10 hp gain. zzzzzz Snore zzzzz
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Old 05-23-2011, 11:05 PM
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Quote:
Originally Posted by Greg T
Been there done that with an s10, 4.10 gears and TH400. Nothing special. Little compression boost and maybe 8 to 10 hp gain. zzzzzz Snore zzzzz
Wow talk about a buzz kill...
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Old 05-23-2011, 11:21 PM
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Sounds good brother. All that matter is that you like and can notice a performance upgrade. Never mind the negative posters there just jealous
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Old 05-23-2011, 11:21 PM
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Quote:
Originally Posted by Jerry Marshall
Wow talk about a buzz kill...

Just keepin it real. a fairly stock 350 with stock 305 heads is not crazy fast.
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Old 05-24-2011, 08:43 AM
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Nice to hear. I'm putting 305 heads (416's) on my 327. I'm not looking to win races just to have a nice quick car for the street. It'll never see over 5500 rpm. I get the whole Vortec thing, but just because Vortecs are good doesn't mean everything else is bad. I really enjoy this forum, and it's members have been extremely helpful to me, but sometimes I feel like there should be seprate engine sections for "Street and Cruise Night" and "Hard Core Speed", because those really are two different things from the persective of budget and time invested. What do you think?
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Old 05-24-2011, 09:22 AM
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We all have our favorite combinations, maybe the OP hasn't built a bunch of really hi perf. engines to compare his with. If it's "smokin fast" to him then congrats.
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Old 05-24-2011, 10:16 AM
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Quote:
Originally Posted by Dougie
I get the whole Vortec thing, but just because Vortecs are good doesn't mean everything else is bad.
But Vortec heads ARE the yardstick that all other SBC production heads are compared to. And there are very good reasons for this.

Quote:
...sometimes I feel like there should be seprate engine sections for "Street and Cruise Night" and "Hard Core Speed", because those really are two different things from the persective of budget and time invested. What do you think?
I feel you, guy, I really do.

The thing is, while one may think a 305 headed 350 deserves no credit, and another thinks it's 'all that'- it's ALL Hotrodding and that's the gist of the forum, IMHO.

Separating the forums does nothing constructive and to me would seem to drive a wedge between the factions. I would hope that through a natural progression, that the first "305 head on a 350" build might become a 350 w/Vortec heads that eventually morphs into a Brodix aluminum headed 383 w/all the bells and whistles.

But w/o exposure to ALL the info available, that natural progression may be hampered. At least the way it is now, like it or not- the opinions are free for the posting. Just because you may not agree w/a post doesn't mean there may be some merit to that post. It's ALL food for thought, IMO.
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Old 05-24-2011, 10:40 PM
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I agree with you Cobalt. Its all about hotrodding. I did the 305 head thing on my truck and I am happy. At least the OP is hotrodding something.
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Old 05-24-2011, 11:33 PM
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i built a 350 about 8 years age it had a set of ported and polished 350 i did in my dads shop. They had 1.94 intakes and 1.60 exhast with 5 angles on the seats 15-30-45-60-78. It was put in a 88 s-10 with 3800 stall th350 with 3.73 and 28-10 slicks. The truck only had the inner fenders an air and heater removed. IT ran 7.67 at the local 1/8 mile track.
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Old 05-25-2011, 01:18 AM
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Kinda off topic, but "everyone" has heard of the 400 SBC head that came w/ 1.94" x 1.6" valves.

I personally have never actually seen- or talked to anybody I trust who has seen a set of these elusive heads, but it does beg the question as to what the possible benefit of this might be in a properly spec'ed SBC engine. It seems like if the combo were right for it there might be something there.
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Old 05-25-2011, 01:21 AM
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When I first started rodding that was what I used was 416 castings on a 350
with a smallish cam. I liked the torque and how quick it would tach. We later learned stick`em on a 400 and shoot it with nitrous they didn`t like that much as they cracked on the second shot. We replaced them with a set of Dart II`s with 200cc runners and things got really nasty then.
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Old 05-25-2011, 08:52 AM
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Quote:
Originally Posted by cobalt327
Kinda off topic, but "everyone" has heard of the 400 SBC head that came w/ 1.94" x 1.6" valves.

I personally have never actually seen- or talked to anybody I trust who has seen a set of these elusive heads, but it does beg the question as to what the possible benefit of this might be in a properly spec'ed SBC engine. It seems like if the combo were right for it there might be something there.
Yes, 1970 400 came with 1.94 intake and 1.60 exhaust valves. The last 3 digits of the head casting number are "598". These heads are very simular to "441" castings.
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