Tired of posting in the classic tech section for noone to read. hoping some local boys and girls may be able to help instead...

ok, after happily finding out my BBC was not a 396, but actually a 454, I am contemplating a stroker build this winter (or next, depending on funds).
In the mean time, I would like to do some of the cheaper, simpler work. Here is what I am working with:
Block number: 14015449
Heads: 14081045
Anyone know anything about these heads? I know they are oval port open chamber heads, but I have no clue on combustion chamber size, valve size (I assume 2.06 and 1.72).

What I have in mind is the larger Race-Flo valves (2.18 and 1.88), pocket porting with some bowl cleanup, short side smoothing, etc. Also roller rockers, though not sure about extending the ratio or staying stock.

For the cam, I am looking at the following:
Comp Cams 11-218-4 236/236 (@.050) .561/.561
Crane 134561 236/246 (@.050) ..553/.571

Right now, intake is looking to be a performer RPM.

I am going to run a stout th400 with a 2500 stall converter. I know the torque will push that up a bit, so I don't mind shopping conservatively on the advertised stall numbers.

Rear gears are 4.10

I am looking for 475-500hp for now. When the stroker project starts, all bets are off.

I would like to realisticly be in the 11 sec area.

What do you think so far? I know I didn't mention carb selection, but I am not sure where I am going with that. Holley 850 dual feed with a high flow pump are probably in order.

Anything else I should do to reach the goals stated

 

Two things I can tell you from my rat motor days.
(1) You can not use stock rocker arms on a BBC when making alot of HP. I had a 500 HP 70SS396 and had to keep a supply of stock rocker arms. They just keep breaking.
I think the heads #14081045 were made from 1978 to 1987. They were not hipo heads.
(2) The converter would have to be over 3000 RPM stall to stay anywhere near the power band.
I will see if I can find some of my old books on heads for you. The pain pills are kicking in and am a little foggy at this time. If I find them I will let you know. I have them just not sure were. I have Car mags going back to 1970. That means I have alot of boxes to check thru. Maybe I will mark the boxes this time. Might make it a little easier next time.

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87 IROC L98 700R4 A few mods. Best et 12.96 at 110 mph
All motor No NOS or Supercharger.
96 WS6 FORMULA Best et 13.5 at 105 mph

[This message has been edited by Chris Ja (edited July 24, 2002).]

 

Id go w/performer rpm airgap. Ive never seen that intake make less hp or torque then the plain rpm.
for that power level, 850 would begood, maybe too much. but if you plan on bigger upgrades in near future, then Id get it now. Id either get the demon carb or the new high perf. holleys. forget what they are called, but they run ab out $500 or so. they are much more adj. then the standard holley.
make sure your stall in closer to 3000. my 402 bbc made around 425 HP and ht was near advertised stall.
that comp. cams one is the same one Ihave in my 402. I think that may be too conservitive. but Id call comp. cams to see what they suggested.
all those head mods. you listed will help, but it those are late 70's heads, then tney wont flow for crap anyways. If yo can afford it, go for some good heads now. there is alot of power to be had between those heads and aftermarket. plus if you get alum. , youd prolly save about 60lbs. I know afr makes some oval port heads now for bbc. good luck.
chris

 

I second that on the aftermarket heads. There is so much power to be gained in aftermarket heads. Look for a proven combo, cam to match the heads, etc. Sounds like a good project. What is it going in?

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hchap63@hotmail.com

01/SS, Black A4, TR224/112, ARE stage 2 heads, lid, FTRA, PMAF, PTB, Grott LT, true duals, NGK, ASP pulley, Vig 3200, LCA, poly TAB, Convo pros, ET Streets, 3300 raceweight. Little bit of juice..

Best ET: (All bolt ons) 11.496@116.42 (1.52)

Current best after Head & cam & nitrous:
10.88@124 (1.60)

Motown Muscle King of The Hill winner 6-8-02. Want some? Get some!!

RIP #3 Dirty Dale!!!

 

I dont like either cams.

This is why.

The Comp is a Single pattern and with those heads that wont work. You would need a dual pattern like the crane.

Tthe crane i dont like cause, well i dont like it.

Id suggest a Comp Cam Extreme Energy grind somewhere in the .540-.560 area. Perferably a hydrolic roller
I dont have my comp book at hoe, its at work (ramchargers)
That lift would work well with a ported factory and an aftermarket head.

Yes you could run an 850, however a 750 would be better on the street. ay i suggest a 750 Speed Deomon for your needs


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DaveD
1998 WS6 #207
-ARE Stage II Head/Cam
1998 Regal GS
-It Has Boost

The Phantom of CamaroZ28.com
Http://PhantomTA.cz28.com

[This message has been edited by PhantomTA (edited July 24, 2002).]

 

I bought a Speed Deomon carb, and they look nice, have lots of neat little add ons, but from every review and person I've talked to the Demon carbs are over glofified. They have some stuff that the Holley's don't, but that's all it is, stuff. The 4 corner idle is nice, but holley has that at a lower price and they work exactly the same. I'm just saying the extra little things the Demon carb has doesn't make their high price justified.

As for the cam I pretty much agree with Dave on it, and you'd make pretty good power with that duration the Crane cam has, but do like he said and get a Comp cam.

 

The Demon is better than the average Holley. you get what you pay for.

------------------
DaveD
1998 WS6 #207
-ARE Stage II Head/Cam
1998 Regal GS
-It Has Boost

The Phantom of CamaroZ28.com
Http://PhantomTA.cz28.com

 

Thanks for the input so far, I am realy appreciating it.
As far as the demon goes, is it really worth all that extra cost? I have yet to see a demon under around $600. Most are closer to $900. At that point, when you consider the cost of the intake (I'd like to do the polished edelbrock), I could almost just go injected.
Had a good week at work as far as sales go, might be able to pick up some heads next week, if I can find something at 1000-1200. Any suggestions in this range?

Oh, and this motor is going in my 1969 Camaro
I wish I could make this kind of power in my 99, but I think I'd twist that convertible up like a pretzel

 

Ill get you a 750 Speed Demon #1501402010 for $439.99.

Far less then 900.00



Im at the Taylor Ramchargers

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DaveD
1998 WS6 #207
-ARE Stage II Head/Cam
1998 Regal GS
-It Has Boost

The Phantom of CamaroZ28.com
Http://PhantomTA.cz28.com

 

What do you guys think of the aluminum Edelbrock heads? They seem like one of the only realistic choice in my current price range.In the cast iron side of things, these from world castings don't sound bad:
http://www.racesearch.com/CGI/racese...iption_id=2059

PhantomTA, do you guys carry either of these?

[This message has been edited by Timberwolf (edited July 24, 2002).]

 

We can get either one dude.

-Joe
(Ramchargers, Madison Heights)

Trust Dave, he's the man.

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-Joe
79' Z28 4-spd
http://joesmith59.freeservers.com/
*Boycott Lapeer*

 

I found this in Chevy High Performance july 02 page 82. 454 450 hp 530 pound of torque. Pocket port a set of iron Oval port heads with 219 inch intake valves, aerson cam hi flow ah 220/220@0.050,0.542/0.542,111I.s, edelbrock performer RPM pn7161,holley or speed demon 750 cfm,hooker lt 1 3/4, 2 1/2 inch exhaust. This was with 9.0:1 compression. At 11.0:1 that would put you at around 490 H.P.
I would wait until I could get a set of better heads and you would easily make over 500 H.P.
Hopes this helps.

------------------
87 IROC L98 700R4 A few mods. Best et 12.96 at 110 mph
All motor No NOS or Supercharger.
96 WS6 FORMULA Best et 13.5 at 105 mph

 

Actually I found a set of Merlin heads at a pretty good price, so I am picking those up next week. How does that change you guys' prescription?

 

Ok guys, what do you think? I have revised the recipe for this winter's project:

454 4 bolt bored .060
stock stroke, forged crank
Performer RPM Air Gap
Holley 850
Hooker headers with 33" primaries, 10" collectors
bowl blended and mildly ported GM 353049 heads with 2.19 and 1.88 necked down and undercut valves (found out the Merlins were not what I thought)
Trans plan as of right now is a th400 with around a 3000rpm converter
3.55 gears
Here is the cam I am thinking of using...the Engine Analyzer 3.0 software really shows it to work nice with this combo, making tons of torque down low and across the board. Over 540hp too at around 5500.
But there's no substitute for experience...so I come here.
Lunati 00026 (specs from www.lunaticams.com)

232 intake @ .050
239 exhaust @ .050
293/310 advertised duration
.549/.558 lift
110 seperation
104 intake c/l

opens/closes @.050
12°BTC 40°ABC /
55.5°BBC 03.5°ATC

intended use is embarrasing local street cars, weekend strip use

 

I was going to suggest the -049 or -781 open chamber heads.
Keep in mind that if these heads aren't already set up as described, you're probably going to spend 5 or 6 hundy getting them there.Also, I have a set of -781's available for $200.
They'll need all the work you described but are good cores.
I went with a closed chamber head on my 427.
Bottom line, you'll like the big block, big time. Just use quality
parts in the bottom end and personally,I'd bump the compression
up to the 10.0:1 range and run a larger cam ( I hate disappointing
performance).Of course mine isn't driven everyday........