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Advice with new 350 bored .040 (357)

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Old May 3, 2006 | 02:21 PM
  #1  
supaflypriest's Avatar
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Joined: Jan 2004
Posts: 24
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From: St. Louis
Car: 90 Formula 350
Engine: 350
Advice with new 350 bored .040 (357)

I need advice, i've looked through the posts, and i have a better idea, but still need some good advice. The car is a daily driver and i would like to get into the 300 rwhp range, but still have good MPG.

I bought a 357 for $300. It has:
4 bolt main
New GM Rods
New GM Cast Steel crank
New bearings
New Oil Pump
New Hypereutectic Pistons .040 over 9.6 to 1 Compression

I was told that i should just get a "step up replacement" Cam & lifter so i wouldn't have to mess with the ecu, but i don't think that will get me to where i want to be.

What combination Heads and Cam should i get?
For the Cams, I've heard good things about the LT4 Hot Cam, & Crane 2032.

And for the Heads, i've heard good things about Vortec, or AFR's. I don't want to spend too much money on this, but whatever it takes.

Please help me with my issues!!
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Old May 3, 2006 | 03:18 PM
  #2  
five7kid's Avatar
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iTrader: (14)
 
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The first "issue" you're going to have to overcome is the fear of PROM tuning. It's your friend, so embrace it.

What else do you have planned for the TPI?
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Old May 3, 2006 | 03:30 PM
  #3  
supaflypriest's Avatar
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Joined: Jan 2004
Posts: 24
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From: St. Louis
Car: 90 Formula 350
Engine: 350
i guess i am a little intimidated with the ecu, but if i upgrade the cam, even if its a step up, i have to burn a new chip?
i love the low end tq of the tpi and would like to get bigger runners as well to increase that.

Last edited by supaflypriest; May 3, 2006 at 03:35 PM.
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Old May 3, 2006 | 03:41 PM
  #4  
five7kid's Avatar
Moderator
25 Year Member
iTrader: (14)
 
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Well, consider this: SDPC2000 took an L98 block (or maybe it was L31 - doesn't matter, same thing), added upgraded Vortec heads, their Vortec TPI base, LT4 Hot Cam & 1.6 roller rockers, Edelbrock runners, 58cc TB, and headers for 360 gross flywheel horsepower without any PROM tuning.

They have the upgraded Vortec heads kit, LT4 Hot Cam kit, & Vortec TPI base available on their site. You add the TB, runners & headers, port the plenum, and assuming the typical 20% drivetrain loss you're at 290 RWHP.
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Old May 3, 2006 | 04:32 PM
  #5  
supaflypriest's Avatar
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Joined: Jan 2004
Posts: 24
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From: St. Louis
Car: 90 Formula 350
Engine: 350
sounds like that is very close to my goal, i'll do some more research on that setup. Thanks alot!
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