91Bird305

I was looking over the ZZ4 and ZZ5. I thought for sure that I wanted the ZZ4 for next year but now I am starting to lean towards the ZZ5. What do u guys think? Here are the specs.

ZZ4
http://www.paceparts.com/zz4_crate_engine.htm

ZZ5
http://www.paceparts.com/fast_burn_385_engine.htm

Oh and I will be switching to carb too. I am going to use the Speed Demon 750cfm vacumm secondary carb. The price difference in parts and motors come to around $860.00 more for the ZZ5 since it doesn't come with a distributor like the ZZ4 does and the motor itself is around 500 extra. So what do u think? The ZZ4 has 355hp w/ 406lbs torque and the ZZ5 has 385hp w/ 385lbs torque. You think it is worth 860.00 more for the ZZ5 or should I stick with the ZZ4? Thanks guys.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone
http://members.aol.com/j007golden/91firebird.html

vortecfcar

get the zz4 short block and AFR heads and LT4 hot cam, price will be about the same as fast burn engine and horsepower will approach 450

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104

91Bird305

Sweet, thanks.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone
http://members.aol.com/j007golden/91firebird.html

JPrevost

I think I'm going to be doing the same, maybe getting the caprice short block (2 bolt main). Anyways, what do you figure the hp would be if I got the AFR 190cc street heads, dual plane intake, 750cfm vacuum sec. holley. Still exploring my options for my swap to a NJ emmisions legal high power engine. Was looking into a 383 but I'm not sure I can really justify needing a stroker. Besides, a 350 in an RS flat hood would make me smile plenty. Add a little NOS just to really make those rice boys bitch about how they couldn't hook up and how they missed a shift etc. By the way, Need for Speed High Stakes has such a cool intro movie. If you haven't seen it try to. They have a rice rocket at a stop light and it trys to race a turbo pors, it's really funny.

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, Jon (91 RS too many mods to list)