hey just need some input here. i have an 87 z28 with a 350 carb'd that im going to make into a street strip car. alright my plan is to make 500 hp with the 350 block bored .060 over making it a 360cid using stock crank, stock rods with arp bolts, trw forged flat tops, solid 420 lift cam, 906 heads, crosswind high rise intake, edelbrock 600cfm carb, headers, straight piped, hei dist. running royal purple, and 93 octane. what my question is, is am i going to make the 500 hp goal? if not what can i do? any and all responds are welcome and appreciated or if you have any other comments please feel free. thanks! kyle

 

Hey man, welcome to TGO. Glad to see I was of some assistance. As far as your build plan goes, are you using a crate engine or is it a the the 350 that came in the car only carbed?

 

likely gonna be far from 500hp with that setup. Heads need work, need a better intake (single plane) and alot more cam to make 500 using 906 heads

 

i bought the car with a "305 with a cracked head" turned out it was a 350 with blown intake gasket. the computer wiring had been cut out of the car which i didnt mind because i was planning on going with a carb anyways. but its an older style block with casting numbers that says its a corvette block (which made sense because it had the finned top corvette valve covers on it) camaro is a 87 z28 that came with a tpi 305 H.O. so it had already had an engine swap

 

i was trying to stay away from a bigger cam do to the fact of machining and moding the heads, at 420 lift i wouldnt have to

 

Price you pay to make power with a factory casting. You need some lift to get the valve curtain area to pass the flow required to make the ponies.

IF you dont want to do that, get a 100shot nitrous

 

Most would say you are pushing the outer limits of stock rotating assembly with 500Hp

This 906 head 350 made 390Hp
http://www.chevyhiperformance.com/te...est/index.html

 

i was thinking maybe a 75hp wet shot but you say 100?

 

i was told a stock rotating assembly will hold just above 550hp with the exception of the rod bolts thus the reason of upgrade to arp

 

You can atleast swap in beehive spring kit and have enough clearance to run .470" lift easily. Some guys claim .500". You'd have to find out by measuring retainer to guide clearance, but in either case, a new cam should NOT use stock vortec springs. Match the cam to the springs and the springs to the cam.

You can do a 100 shot easily on a stock bottom end. Build the motor to 400-425hp since thats about all you'll get while keeping it streetable unless you rework the heads/intake, and spray a 100 shot to get over 500

 

have any other ideas for cheap heads? runnin out of money lol i already have 6k into this car and it dont even have paint motor or rims and tires yet!

 

906 vortecs are gonna provide the best bang for the buck, but a few hundred bucks more in valvesprings/screw in studs with machine work is totally worth it IMO. You can make great power on them as cast, just hard to reach 500hp on a set of those heads. lower 400's is more realistic, which aint bad, still a low 12 second car. Just spray it for more power if your on a budget. Nitrous is a great bang for the buck

 

alright thanks so much guys it all helps!

 

https://www.thirdgen.org/forums/tech...ortec-lt4.html

http://www.alexsparts.com/products/V...YD-ROLLER.html

IIRC , there is no flow gain over .500 lift on stock Vortecs

 

so there is no point in going over .500? or there i no point in going less than .500?

 

To maximize the time the valve lift is at least .500", you want to pick a cam that generates more than that at peak lift. You can disregard all the "wives tales" or repeated internet blabbering that Vortec heads will show a drop in intake flow UNDER OPERATING CONDITIONS, NOT on a flow bench, when intake lift exceeds ~.500".
I have enough experience with LT1 iron heads, which have identical port design as the Vortec L31, and unported, they respond favorably to intake valve lifts up to .550". I'm talking dyno numbers and 1/4 mile performance, not flow bench numbers.

 

ok. i dont have any 906 heads yet i was just thinking about using them. for the cheapest way and the best chance of getting the 500hp goal what heads would you suggest and what would have to be done to them? the more specific the better im kinda new to this head ordeal so please any input is greatly appreciated or if you have any other cheaper ways to get to 500hp with my block, intake and carb please do tell. those are the only things i have so i will be using those.

 

Get some rims/tires before you go any farther on the performance/power aspect of the car.

 

Google 500Hp SBC.

There are ,000's of builds documented out there that will give a indication of parts ( and $$$$) needed to make your required Hp

Exp
http://www.carcraft.com/techarticles...ine/index.html

NB you are unlikely to make 500Hp with your little carb