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Old Mar 23, 2002 | 11:09 PM
  #1  
mystikkal_69's Avatar
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From: San Antonio, TX
Car: 1988 IROC-Z
Engine: L98 (350 TPI)
Transmission: MD8 (700 R4) + 3.42 LS1 Rear
Help Me Build My Engine

well guys looks like the L98 in the 89' spun a rod or 2 or 3? it's dead. really sounds like crap. i would like to build a stout 350 with 450hp naturally aspirated and 550+ on juice .

1.) L98 Block - any suggestions for mods on that power level (main studs? will it hold up while on juice? splayed mains?)
2.) AFR 195's or 210's? (street/strip)
3.) Miniram Intake
4.) Compression Ratio - thinking around 10.3:1 (the max for pump gas in other words/alum heads)
5.) Engine will spin about 6500-7000 RPM Max (if it is not needed to spin that high to make that power, that's great)
6.) I would like to use roller lifters (any suggestions)
7.) 1.5 ratio roller tip rockers. (alum not good here?)
8.) And most importantly cam selection.......
this is where i am stumped. i would like to use a roller cam. i am uncertain if the hot cam would support 450hp? what cam would support that power level? any and all suggestions are welcome. help me out guys. i'm trying to make a fourth-gen killer. thanx.

Edit: 9.) The Crank - Forged Right?
10.) Pistons - Forged
11.) Rods - H Beam or I Beam (stock rods won't hold up):sillylol:

Last edited by mystikkal_69; Mar 24, 2002 at 08:01 AM.
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Old Mar 23, 2002 | 11:22 PM
  #2  
Mark A Shields's Avatar
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From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Oops , just saw you're throwing Miniram on there. What about exhaust? Get some SLP headers, normally as everyone on the exhaust board knows I'd recommend the Hooker cat-back, but with that much HP, a 4" system or duals might be the best way to go.
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Old Mar 24, 2002 | 08:04 AM
  #3  
mystikkal_69's Avatar
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From: San Antonio, TX
Car: 1988 IROC-Z
Engine: L98 (350 TPI)
Transmission: MD8 (700 R4) + 3.42 LS1 Rear
yeah i was gonna get the slp 1 3/4" non emissions headers. i was gonna make duals fit under car even though they might scrap over large bumps. i assume i will need larger injectors to feed the beast. 24 pounders not enough? well keep the info coming. thanks.
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Old Mar 24, 2002 | 12:13 PM
  #4  
8Mike9's Avatar
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
If you're planning on running true-duals, why not look into a longtube header and ceramic coat them? No use buying the SLP shorties, then "dualing" them...I don't see much benefit, plus you're paying for a y-pipe you won't be using.
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Old Mar 24, 2002 | 12:39 PM
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From: PA
Since you have to buy a forged crank, why not build a 383?

No need to spin that fast to make 450hp. You can make 450hp at 5500 rpms and spend less money on valvetrain and lowerend parts.
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Old Mar 24, 2002 | 02:00 PM
  #6  
mystikkal_69's Avatar
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From: San Antonio, TX
Car: 1988 IROC-Z
Engine: L98 (350 TPI)
Transmission: MD8 (700 R4) + 3.42 LS1 Rear
that's an idea.... long tube headers. i'm gonna need some ideas on making the true duals work. hmm yeah i was thinking about a 383. i haven't decided yet though. well if i do plan on building the 383 wouldn't i still need to get forged rods right? who sells a good 383 kit for a reasonable price? thanx for all the good info guys. keep it coming.
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Old Mar 24, 2002 | 02:04 PM
  #7  
mystikkal_69's Avatar
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From: San Antonio, TX
Car: 1988 IROC-Z
Engine: L98 (350 TPI)
Transmission: MD8 (700 R4) + 3.42 LS1 Rear
what about machine work that needs to be done to the block?

-Decking
-Align Boring?
other suggestions please insert here

thanx again
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