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Old Jul 22, 2011 | 08:13 PM
  #1  
91 Droptop's Avatar
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
Axle/Gears: 4th gen 342
Best heads

I am going to go with a Stealth-Ram set up with my Paxton, looking to add heads and a cam, any thoughts on bang for the buck. It is a 305 TPI now with the Paxton, being it is a 91 Z convertible I want to keep the original motor (has 88,000 miles) I know I could drop a 350 in but i want to keep the original motor.

I was going to do the Vortech heads and a Edelbrock Vortech TPI base but that dam manifold is $600-700
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Old Jul 22, 2011 | 08:32 PM
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Re: Best heads

Why not a Vortec version of the Stealth Ram?
Then do 1.6" exhaust valves in the Vortec heads, especially since you're forcing extra intake flow.
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Old Jul 22, 2011 | 09:43 PM
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91 Droptop's Avatar
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From: FL
Engine: 355 Super Charged
Transmission: B&M Streetfighter
Axle/Gears: 4th gen 342
Re: Best heads

I did not see that it had a Vortech version, with vortech stealth-ram and aluminum heads and a better cam I should hit about 325hp correct? with my Paxton being redone and the new impellar they are rating it at an additional 120hp on top of the motor. With the 700R4 I will be happy if I get about 360 or so to the rear wheels.

I am starting on the body this weekend, need to patch the firewall and the floors, then the entire body. I hope to have this back on the road by mid October.

Last edited by 91 Droptop; Jul 22, 2011 at 10:38 PM.
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Old Jul 27, 2011 | 10:39 PM
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From: SoCal
Car: 97 Z28
Engine: 396 LT1 518whp All Motor
Transmission: 6spd
Axle/Gears: 4.10 LSD
Re: Best heads

I have some vortecs for sale $350
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Old Jul 27, 2011 | 10:58 PM
  #5  
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From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: Best heads

Originally Posted by 91 Droptop
I did not see that it had a Vortech version, with vortech stealth-ram and aluminum heads and a better cam I should hit about 325hp correct? with my Paxton being redone and the new impellar they are rating it at an additional 120hp on top of the motor. With the 700R4 I will be happy if I get about 360 or so to the rear wheels.

I am starting on the body this weekend, need to patch the firewall and the floors, then the entire body. I hope to have this back on the road by mid October.
If you do heads/cam/supercharger along with supporting mods you should blow 325rwhp out of the water. You should be closer to 380rwhp.

N/A LT1s with a LT4 hot-cam regularly hit 330rwhp and they have head flow similar to a vortec head, and the HSR has similar flow and power curves.
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