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about 360 hp

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Old Feb 9, 2007 | 07:20 PM
  #1  
Jap408Cracker's Avatar
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From: San Jose, Cali
Car: 87 IrocZ/87 Iroc Z28
Engine: L98 350 TPI/ LT1 350
Transmission: BW T5 5spd/ 700r4 A4
Axle/Gears: 10 bolt posi 4.10/10 bolt posi 3.73
about 360 hp

my goal is to get around 360 hp to the wheel. i got a 350 tune port that is all stock. going to throw some new heads, high flow intake man and runners in but not sure if this will get me there. i was going to throw a cam in but changed my mind because i was concerned about it not being smog legal, and the fact that i didnt want a chip burned. i want to know if this is a smart way to go and if its even possible to get to my hp goal.
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Old Feb 9, 2007 | 07:30 PM
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From: Pittsburgh, PA
Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
LOL 360 WHP + TPI doesn't = street legal LOL
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Old Feb 9, 2007 | 08:27 PM
  #3  
3rdgenZ's Avatar
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From: south Louisiana
Car: 1985 Z28
Engine: 85 L98
Transmission: 700r4
Axle/Gears: stock 10 bolt-3.73 eaten posi
Originally Posted by Boosted_SS
LOL 360 WHP + TPI doesn't = street legal LOL
with the stock TPI and a blower or nos he might.

but on a serious note a well setup holley stealth ram or even a super ram could get you there. is you goal strickly HP #s or is there an ET youre looking for?
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Old Feb 9, 2007 | 09:22 PM
  #4  
Boosted_SS's Avatar
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From: Pittsburgh, PA
Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
a blower might be his only "street legal" rout. it's illegal to have NOS hooked up while driving on the street in most states.
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Old Feb 14, 2007 | 01:25 AM
  #5  
89Nighthawk's Avatar
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From: Texas
Car: 89 GTA Nighthawk
Engine: 389 CID Vortec TPI
Transmission: TCI 700R4 w/Vigilante
360 RWHP without a PROM change, doubtful.

360 RWHP with TPI and street legal? Yes! It's possible.

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Old Feb 14, 2007 | 11:44 AM
  #6  
1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
With a moded TPI it sure is.
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Old Feb 15, 2007 | 09:41 PM
  #7  
Sprayed92's Avatar
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From: Belleville,IL
Car: 92 Formula
Engine: 383 248/256 cam
Transmission: 700r4 3500 stall
Axle/Gears: 9" 3.89 gears detroit locker
150 shot on my bolt on 350tpi 355/463 so yes it can be done
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Old Feb 16, 2007 | 10:50 AM
  #8  
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From: MA
Car: 1981 Chevy Malibu, 1987 Formula 350
Engine: 229 V6, L98 TPI 350
Transmission: TH350, 700R4
Axle/Gears: 10 bolt ???, 9 bolt 3.27 posi
I love things like this,where someone wants a very respectable horsepower number but doesnt want to change the cam or get their computer re-programmed......
I think to get to the HP numbers you want without spending loads of money, you're gonna have to get a cam and having a chip burned for your setup would also be important.......
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Old Feb 16, 2007 | 01:42 PM
  #9  
zz4monte's Avatar
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Joined: Jul 2006
Posts: 365
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Car: 87 Monte Carlo ss
Engine: ZZ4 1.5 rollers 650DP
Transmission: Probuilt 700-R4
Axle/Gears: 8.5 GN 3.42
360 at the wheels? Your going to need about 450hp at the flywheel your more then likely not going to get there with a naturally aspirated 350 that is a daily driver.420-30hp seems more realistic with a TPI 350 ( You will need Stealth Ram or something like it). It would be easier with a 383. CHP did a build up a while back where a guy had a 383 thirdgen with serious heads & cam and I think he made around 460hp but he had all the bells and whistles and spent 6k plus on the 383.Either way it won't be done with just bolt-ons to your motor unless you spray with a 150+ shot of nitrous.

Last edited by zz4monte; Feb 16, 2007 at 01:47 PM.
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Old Feb 17, 2007 | 03:42 AM
  #10  
89Nighthawk's Avatar
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From: Texas
Car: 89 GTA Nighthawk
Engine: 389 CID Vortec TPI
Transmission: TCI 700R4 w/Vigilante
I've got $1K just in my cooling system.

Speed costs money!!

Horsepower costs money!!

Once you dive in, there's no going back!

I say this as I plan my next engine upgrade. I'm shooting for 600 HP naturally aspirated with a Holley Stealth Ram. So far I can only manage 560 HP according to my computer modeling. To get the 600 I will probaly have to go to an aftermarket FI system. BUT, a blower is a possibility.

Last edited by 89Nighthawk; Feb 17, 2007 at 03:48 AM. Reason: Add
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Old Feb 17, 2007 | 02:45 PM
  #11  
Steve Mack's Avatar
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Joined: Aug 2006
Posts: 311
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From: Stafford, Connecticut
Car: 87 Iroc
Engine: modified 350
Transmission: high performance built 700R4
Axle/Gears: Strange S60 3:73
Hey night hawk are your numbers made using a tuned port setup? Thanks Steve
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