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350 building for max power

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Old Feb 12, 2003 | 06:18 PM
  #1  
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From: Augusta GA
350 building for max power

ok.....those with experience and/or theoretical knowledge....

how would you build a 350 for maximum power on 87 octane, with good to excellent reliability?

start with the air filter and go all the way to the tailpipe, on a *street* car that will be lowered 1-2" all around
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Old Feb 12, 2003 | 06:34 PM
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Its easy to make power with 87 octane. The trick is to get stuff (air and fuel) in and out as easy as possible. Go with a 750cfm carb with a good intake and great flowing heads. Try to keep compression around 9.0:1. Then to get crap out use some good headers and atleast 3" exhaust.
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Old Feb 12, 2003 | 06:40 PM
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From: Augusta GA
Well....actually....I was thinking in terms of "what parts should I use" and so forth...

I guess I'll try to be a bit clearer on what I'm looking for next time

I'll probably start with the Pro Action Vortech heads, ported/polished, and Hooker 2055s....but other than that.....
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Old Feb 12, 2003 | 11:58 PM
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From: kalamazoo, Mi, USA
I would get vortec heads, a performer rpm intake, and a mild cam with like 430 lift on it. Get it all ported, and ploished. Get a 750 cfm carb, run 9.0:1 pistons, get a really good pair of headers and pipes out the back, duals of course. Should make good power and run forever.
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Old Feb 13, 2003 | 03:43 AM
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From: Sharonville OH
Car: 98 Z28 vert
Engine: LS1
Transmission: automagic
Axle/Gears: 2.73 - boo racing yay MPG
Why 87 octane? it is like $2-$3 more for a tank of 93.
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Old Feb 13, 2003 | 12:44 PM
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From: Avondale, AZ, used to be seattle, washington
Car: 1978 Chevrolet C10
Engine: 350
Transmission: Turbo 350
right now in seattle its $1.68 for 87, and i ONLY run 92 octane in my camaro with an octane booster every oher full tank. so im driving my truck more and more. gas prices now SUCK!!
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Old Feb 13, 2003 | 01:31 PM
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From: phila pa
yea well here in philly its 1.77 for 93 sunoco gas.
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Old Feb 13, 2003 | 02:54 PM
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From: Augusta GA
87 octane is cheapest. plus it's a little more challenging that way

not to mention that a local performance shop said they could build an 87 octane 350 that puts out about 520hp. I'm hoping I can beat their price by doing it myself.

what sort of fuel injection setups give the most power, and is it better or worse than carbs?
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Old Feb 13, 2003 | 04:32 PM
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From: England UK
Car: 85 Z28
Engine: LG4 modified
Transmission: 700R4
$1.77 ?? is that per gallon?

I only ask because over here you'll pay close to that PER LITER. I think you guys should think yourselves very lucky.
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Old Feb 13, 2003 | 05:39 PM
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From: Pueblo Co
Car: 1989 C4
Engine: L98
Transmission: 700r4
Axle/Gears: 307
Originally posted by si_camaro
$1.77 ?? is that per gallon?

I only ask because over here you'll pay close to that PER LITER. I think you guys should think yourselves very lucky.
Yea but over seas driving out of the country (most cases) is the same distance as us driving out of state.


BT topic. Just start looking in the car mags and follow thier builds, thats probably the best way to do it or start looking at users sigs. Of course a nearly stock engine can put out impressive numbers with a nice blower and run on 87 just fine.
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Old Feb 13, 2003 | 06:03 PM
  #11  
ede's Avatar
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From: Jackson County
one thing i'd look into is running dished pistons along with the smallest chamber heads i could find.
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Old Feb 13, 2003 | 08:50 PM
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From: Sharonville OH
Car: 98 Z28 vert
Engine: LS1
Transmission: automagic
Axle/Gears: 2.73 - boo racing yay MPG
Dished pistons, 64cc heads, Mild cam. Good ignition, and a blower. stay far away from NOS
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Old Feb 13, 2003 | 09:29 PM
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Ohhh, darn, I have the exact formula for a 700hp 350...only problem is that it's designed for a car that hasn't been lowered...
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Old Feb 14, 2003 | 11:43 AM
  #14  
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From: Augusta GA
heheh. a blower sounds nice, but I was hoping for NA.

8Mike9, let's hear it anyway. Got any pics to show why it wouldn't work on a lowered car?
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Old Feb 14, 2003 | 01:07 PM
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Lol, it was just a joke...there's no difference in building a 350 for XXX-hp for a lowered car, or a 4wd.
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Old Feb 14, 2003 | 01:09 PM
  #16  
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From: Augusta GA
ahh.....I figured exhaust setup would create an issue with ground clearance lol

too bad it was a joke.....700hp sounds *nice*
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Old Feb 15, 2003 | 07:17 AM
  #17  
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From: Sharonville OH
Car: 98 Z28 vert
Engine: LS1
Transmission: automagic
Axle/Gears: 2.73 - boo racing yay MPG
that is easy and it won't work in a lowered car... BIG BLOCK : ).
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Old Feb 15, 2003 | 12:31 PM
  #18  
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From: Augusta GA
and how many 350s are BBs?

350 *is* the displacement requirements. it can be bored out as necessary in the process of getting the block machined/honed/surfaced/etc, but it had to come out of the mold as a 350 block.

I might consider a stroker, but not too sure on the reliability and/or if they'll like running on 87 octane. about all I know about them is what the word "stroker" implies - larger crank that gives the pistons a longer stroke, thereby raising compression. that and that they're supposed to be really torquey :lala:
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Old Feb 15, 2003 | 12:36 PM
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
You can get low compression dished 383 stroker pistons, which will allow you to run 87 octane.
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Old Feb 15, 2003 | 12:41 PM
  #20  
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From: Augusta GA
I see.....how are they for reliability and gas mileage compared to non-stroker engines of similar size? (ie 383 stroker vs some other engine that equates to approx 383 cubes)

this is for a pure street performance car

And performance as well. How are the numbers in general?
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