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Old 12-23-2011, 10:07 AM
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Fantasy 283 build

Yeah I know but Im at work with nothing to do.

I have a solid 283 shortblock .030 with flat tops, everything else is recon. GM

What sort of top end package would you guys use for a street car? I have powerpack heads but they need to be completely redone. I also have a set of iron 305 tpi heads. And lastly I have access to a set of 305 'vortec' heads from a marine application (never used).

I have the usual pile of Q-Jets, Holleys and the odd Edel. 600cfm carb.

I have a performer non airgap non 'RPM' manifold.

I do not mind buying a vortec manifold.

This will probably go in front of a 200-4r and while I cant wait to see off the wall ideas with roller cams and 10,000rpm redlines; realistically Im most likely going to be happiest with a fat midrange and the occasional high RPM blast.

Figure a lightweight car say 3400 or so.

And its gotta sound wicked mean and nasty...and have power brakes (bum leg)
no problems with a vac. canister setup tho

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Old 12-23-2011, 10:43 AM
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No sweat! I "like" the early 305 "HO" heads (601s) for this application. Maintain the 1.84" intake. 1.6" exhausts wouldn't hurt... The TPI heads are more difficult to work with when using "early" manifolding. Upgrade them with screw-in studs and guideplates. If you really DO plan to rev it beyond 7,500, I would also recommend a stud girdle.

You COULD rebuild your Power Packs and add the larger intake valve as well as the studs and guideplates. Decent heads on the "little" engines.

I also "like" Performer on 283. The "Air Gap" is a small "plus", but not that big a deal. RPM is too "big" for 283 (IMO). Not usually an Edelbrock "fan" regarding carbs, the 600 AFB "knock off" is a good one for this. A 600 CFM 4150 by AED would be much better... ($$) A 650 might be a stretch unless the revs do go "up".

Comp has some real nice modern "solid flat tappet" cams in the XE family (ignore the negative feedback on XE stuff IF you are good at following instructions). XS262S would be good to 7,000 or so. XS268S would go a bit higher, but may cost too much low-end. They also have solid rollers in smaller grinds if your budget can "stand" it. Be sure to get "positive oiling" lifters, for either. Comp "EDM" or Crower "Cool Face" for the flat tappet, Endurex or HIPPO for rollers.

In 1983 at Firebird Raceway (Phoenix), I saw an '80 Firebird with a 283 run 10.40s. It CAN be done... It was an animal, but still moved that big car quite well!

Jim
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Old 12-23-2011, 11:09 AM
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love it. Good info.

Keep em coming
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Old 12-23-2011, 11:47 AM
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I'd say take a close look at the L30 305 Vortec heads, c/n 12558059- swirl port and all. Should be sufficient for a 283 even w/stock valves and some minor pocket port cleanup and a good valve job. I say should because the cross section area might or might not be sufficient for the RPM you want to turn. Some measurements will give you what you need to decide on what- if any- additional port work is needed. 160 cc intake volume to a 283 is about the same ratio as a 350 w/200cc ports, so the raw port volume should be close to what you need w/o needing major surgery. The chambers are better than the earlier heads as far as plug placement goes, so there's that too.

More on the 305 Vortec heads at Post 478.
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Old 12-23-2011, 01:01 PM
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Quote:
Originally Posted by cobalt327
160 cc intake volume to a 283 is about the same ratio as a 350 w/200cc ports, so the raw port volume should be close to what you need w/o needing major surgery.
This is the type if common sense observation that you newbies should be paying attention to. Thanks Mark.
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Old 12-23-2011, 01:29 PM
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Quote:
Originally Posted by techinspector1
This is the type if common sense observation that you newbies should be paying attention to. Thanks Mark.
This is why I joined hotrodders in the first place. A lot of common sense info on here from knowledgeable people. Not a lot of "bigger is better" mentality. Thanks many times over to both of you and many others as well.
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Old 12-23-2011, 01:44 PM
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i get so tired of people saying junk the 283s, 327s, 305s and 307s. These pieces still have a place in the rodding community. I mean does a T bucket really need more than a 305? No, its nice but its not even close to a need. the thing that brought this up was I was practically given the shortblock and powerpack heads because the owner regarded them as useless. In fact i paid for a muncie 4 spd core and he threw in the engine and bellhousing.


Yeehaw!

Keep the ideas coming
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Old 12-23-2011, 02:18 PM
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Quote:
Originally Posted by AutoGear
i get so tired of people saying junk the 283s, 327s, 305s and 307s. These pieces still have a place in the rodding community. I mean does a T bucket really need more than a 305? No, its nice but its not even close to a need. the thing that brought this up was I was practically given the shortblock and powerpack heads because the owner regarded them as useless. In fact i paid for a muncie 4 spd core and he threw in the engine and bellhousing.


Yeehaw!

Keep the ideas coming
It looks to me that Cobalt327 gave you all the info you need to build that fantasy 283. Don't worry about it sounding "wicked mean and nasty" because to do that you would have to run a "big" cam and wouldn't have enough vacuum for power brakes and you would also give up street manners. A high stall speed torque converter would be necessary for any real performance and with it comes trans heating problems at cruising speeds. Great performance beats a nasty sound, hands down, in my book.
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Old 12-23-2011, 06:52 PM
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I like that 097 solid lifter cam. I think they call that the "fuelie cam" That will really turn that 283 on, and its a neat old school solid lifter cam. Several of the cam makers make a retro copy of that.
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Old 12-23-2011, 07:07 PM
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I've put together a few 283's in past years and I absolutely love them! They wind effortlessly, and make good power when put together with the right components. My personal favorite for heads is the old 1.94 "fueler" heads, which is the largest valve you can use on a 283 sized bore. For cams I like the old 350 HP 327 factory hydraulic cam, or something equivalent. It makes good power off idle, but still winds out well, plus works with power brake systems too.
I'd want to change the pistons to something around 9:1 or 9.5:1 compression, and use a rear gear at least 3.56 to 3.73 to make it all work well.
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Old 01-03-2012, 07:04 AM
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Quote:
Originally Posted by AutoGear
i get so tired of people saying junk the 283s, 327s, 305s and 307s. These pieces still have a place in the rodding community. I mean does a T bucket really need more than a 305? No, its nice but its not even close to a need. the thing that brought this up was I was practically given the shortblock and powerpack heads because the owner regarded them as useless. In fact i paid for a muncie 4 spd core and he threw in the engine and bellhousing.


Yeehaw!

Keep the ideas coming
Glad to see that your head is not filled with `bigger is better� crap

We had 283 std bore and i think with 305 heads,performer intake,600 Holley vac and headers in a Scottsdale p-u-truck and it was really great to drive
I did a re-ring and bearing job to it, with new stock replacement cam and lifters,oil pump,timing gears and chain and a quick valve job and the truck ran good, it was a humble little engine that screamed like an animal when needed and drove like a stock should, the same engine was earlier in our -65 Chevy II with a muncie 4 speed

What is that talk about a th2004r? Have you gone soft or old maybe?
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Old 01-03-2012, 07:07 AM
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Quote:
Originally Posted by 1971BB427
I've put together a few 283's in past years and I absolutely love them! They wind effortlessly, and make good power when put together with the right components. My personal favorite for heads is the old 1.94 "fueler" heads, which is the largest valve you can use on a 283 sized bore. For cams I like the old 350 HP 327 factory hydraulic cam, or something equivalent. It makes good power off idle, but still winds out well, plus works with power brake systems too.
I'd want to change the pistons to something around 9:1 or 9.5:1 compression, and use a rear gear at least 3.56 to 3.73 to make it all work well.
You sir sound like my kind of a guy
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Old 01-03-2012, 07:19 AM
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While I do work for a gearbox design firm that caters to the 4 5 and 6spd crowd; I also have a mild case of Cerebral Palsy. I can still drive a stick, however, stop-and-go traffic makes me nervous. At some point I need to figure out a hand-clutch to work with one of our Muncie's or a T5.

Its good to see constructive criticism regarding the 283s and 305s.

So far, It looks like the 305 vortec heads and a Performer (non RPM) are the front runners. I have a gorgeous QJet and a 300cfm edelbrock along with a Mallory Unilite I found in the box on my shelf from...something chevy-related.
Cam will be something like a 260H; although I have my father telling me t spec out a solid lifter similar to the 260 grind, for nostalgia. I doubt I'll go solid though.

Now, to find a proper car once the foot of snow in my yard disappears around March.

Curiousity: Anyone ever use the L98 aluminum vette heads on a 283? Damn they're spendy though (new).
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Old 01-03-2012, 09:11 AM
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Quote:
Originally Posted by AutoGear
Curiousity: Anyone ever use the L98 aluminum vette heads on a 283? Damn they're spendy though (new).
If we're talking new, they might be expensive. But there should be good used c/n 113 heads w/the D-port exhaust available fairly cheap (avoid the c/n 128 round exhaust port heads). I don't know what the Fast Burn aluminum heads are going for, but their ports and valves are getting big for a 283 engine anyway, IMHO. In any event, a lot of guys dumped the c/n 113 heads in favor of aftermarket heads because the 113- unmodified and if used on a 350 cid engine- leave a lot on the table. Yeah, they can be ported. Given enough tools, skill, time and money, a turd CAN be made to shine. But for my end of it, I'll be talking about heads that are as-cast, or at most have the pockets cleaned up, a performance valve job, and good guides.

For a little 283, the 113's small ports and chambers are a better choice than some of the other 350 heads. But the question is- are they as good as/better than the L30 Vortec heads, or even the 416/601 heads (other than being aluminum)? My biggest fear would be the 113's not having the port velocity that one would expect from a small-ish intake port volume. And judging by some published figures I've seen, they don't (see quote below, from a post at thirdgendotorg).

The L31 Vortec 5.7L heads kill the 113's, flow-wise, but again- if the 113's are used on a 283, there could be benefits to the 113's not seen on larger engines AND there are deficits to the L31 heads if used on a small mill (the chambers of the L31 heads are too large as-is, and they need a Vortec intake- as does the L30 heads).

It would be very interesting to see a 283 SBC dyno sim comparison that included the 113, 416, L31 5.7L Vortec, and 059 L30 Vortec heads (any others?) and a solid lifter cam in the range you mentioned earlier.

Quote:
Casting number 113 flow bench numbers from Graham Hanson:

Lift Intake CFM Exhaust CFM E/I % Velocity
.100 58 50 86% 95
.200 121 97 80% 99
.300 158 122 77% 87
.400 188 142 75% 101
.500 196 156 79% 106
.600 198 160 81% 107
I don't have any flow numbers handy for the 059 or 416/601 heads but if those could be found you'd have a start on what's needed to run a comparison.
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Old 01-03-2012, 09:14 AM
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Typo in my previous post; I have a QJet and a *600* cfm Edelbrock

Does anyone have the missing data Cobalt referenced?
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