Classic Engine Tech 1967 - 1981 Engine Related

Approx HP from my 305? please give me your best approximation

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Old Sep 1, 2002 | 12:20 AM
  #1  
BamaZ28's Avatar
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From: Scott AFB, IL
Question Approx HP from my 305? please give me your best approximation

I have a stock 305 from a mid 80's camaro in my FB. Here is what I am gonna do. Throw in a .450/.450 lift 212/218 duration (approx) stock heads with new springs. Performer RPM intake and Holley 750 carb, Pro-form Billet HEI. Everything else is STOCK! Will is satisfy me until I get a 350 or 400? The reason I am doing this is because it was smoking and missing real bad, so I took off the heads to have them redone for $110 total, and decided to do the cam just for curiosity, please let me know what you think, thanks, I will let you know how it turns out

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1981 Pontiac FB originally V6, converted to SBC (HEI), Performer RPM, Holley 750 Vac Sec., Chrome Dress up, True Duals
Old Sep 1, 2002 | 02:31 AM
  #2  
70 Cam Guy's Avatar
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From: Los Gatos, CA (SF Bay Area)
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I'm not sure about your power but I would think that a 750 cfm carb is too big. I would also go for a Demon carb but I'm biased

Will it satisfy you? I don't know it really depends on the person. For some people a stock camaro is scary to ride in but the next guy you talk to will say its nothing special and just okay.

I used a Proform HEI for a while and it is really nice. For the price they're a great buy. I also heard they're made by MSD so you're not really buying the name with Proform

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Andy
aim: Andyman350
1970 Camaro - 355ci, cam, heads, the normal stuff
pics of me and stuff
Old Sep 1, 2002 | 08:43 AM
  #3  
TJS69's Avatar
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From: Mn USA
Wink

Power is in the heads. I'm not sure what you have, but spend your money on a set.

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69 Camaro Z28 "clone" 327 AT
DAYTONA YELLOW WITH BLACK Z28 STRIPES
327 - "461" camel back heads. TRW,Edelbrock,Ultradyne,Hooker
TPI 700r4 automatic transmission
Old Sep 1, 2002 | 09:52 AM
  #4  
MadMike's Avatar
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From: Dawsonville Georgia
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If this engine was originally a 4BBL from the mid 80's, it's a 155 hp LG4 engine. It has the "305 HO" heads on it. (1.84/1.50 valves).

The cam might pop the power up somewhat.
The carb will kill it though - it'll be a total dog.

If this engine was a 305 with the 2BBL (mid to late 70's vintage) it's the LG3 and the cylinder heads on it would be boat anchors.
Old Sep 2, 2002 | 04:32 PM
  #5  
DarthIROC's Avatar
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From: Teeter-tottering between Brilliance and Insanity
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Ok I have a 305 producing quite a bit of power but its not a stock block Ive had HP estimates from legitimate mechanics anywhere from 380-475 read my sig I dont think I left anything out.

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I find your lack of faith disturbing

86 IROC .040 305 TPI
#186 Heads shaved .040 1.98 valves
Shorty Headers 3 in exhaust with Flowmaster
Lunati 259/271 .500/.515 cam
Highly Modified 700-R4
B&M Slapshifter
3.55 Posi Rear
Accel Plugs and Wires
Petronix Flamethrower Distributor
Cragar 15x7 front 15x10 rear
Old Sep 2, 2002 | 07:02 PM
  #6  
smallwood's Avatar
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From: dallas, ga
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750 cfm is way too big, go with a 600. You'll probably end up with 275-300 hp. Not bad at all for a temporary engine.

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Little red light on the highway; big green light on the speedway, hey,hey, hey!

2002 Formula, GMMG cat back /1983 Z28-sold
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