Ok I have a 81 Z28 with a stock 350 with a WOPPING 175 hp Now I want to build it in a small buget of around $500-$800 COMPLET rebuild, I`m hoping for 300-350 hp

This is what I have 81 Z28 with 882 heads stock, I know the heads a junk so there gone right off the bat

List of parts I already have, all the stuff on my 305

Edelbrock performer EGR
Holley 750 sf sp vs
305 heads with 1.94 intake valves mild bowl job exshust ports ported smooth gasket matched to performer intake, shaved to the max.
272 H10 crane cam .454 lift 272 duration

Will these parts make 300-350 hp?? on my 350, I`m thinking about replacing the dished pistons with cast flattops, I want to spend as little money as possible, since I`m spending it all on my go fast 383 for my 85 Z28, oh and I have a set of 1 5/8 headers for it

 

I'm sure that combo should get you at least ~300 HP at the flywheel. I don't think it would be 350. I think you'd need more camshaft and better heads to get more power. Still, that should be a nice improvement over stock.

BTW, I would definitely spend the extra money now on flat-tops. More compression = more power (and flat-tops are supposed to be the most "efficiently burning").

 

ya I`ll probly get the flat tops, if I could get around 320 hp with that combo I`d be happy as hell, but bein canadian parts are so much, well you know your canadian too, but 300hp would be nice it would take out alot of 5.0 stangs

hey I just looked at your site and saw your time slip from toronto motorsports park, thats Cayuga, do you live near here?? Cayuga is about 45- 1 hour from my house.

 

If you go with flat tops, the compression will be ~ 10.5-1 with 305 heads. I once put L69 305 heads on a flat top 350. I measure the ports and chamber. Chamber was 59cc's. Don't remember the port volumes, but I do remember being surprised that the intake ports were about the same volume as the intake ports off some 041 70 SS350 heads I had laying around. Exaust ports were a few cc's smaller.

Engine ended up in my exbro in laws 69 Camaro. Had about the same stuff as you are going to use, but the cam was the next size up Crane. I did the same work to the heads, but with factory size intakes, 1.84s if memory serves. Car runs like a champ, plenty of power. I'm figuring 300-325. My brother has the car now, and I keep ******* him to fix a few problems it has so he can take it to the track. I want to see how it does. But he has a business to run, short on time.

High compression really makes it responsive, especially up here at altitude, but with your smaller cam and lower altitude (I presume), tune carefully to avoid ping with flat tops.

Pics of the car:

http://www.geocities.com/angel71rs/B...s69Camaro.html

 

Yeah, I hear you about the price of parts!

I live about ~45 minutes east of T.O., and without traffic it takes about ~2 hrs to get to Cayuga, but more like ~3 hrs if there's traffic.

In terms of power, if you check out the '81 in my sig, it had a 383 w/flat-tops, .480/.480 cam, "882" heads (completely stock form), headers/true duals, a Quadra-Jet carb, and ran 14.2 @ 97 mph with a 2.0 60' time, breaking down!! I had a fuel problem at the track, where the engine was starving for fuel, so I couldn't rev the motor above ~4000 - 4500, meanwhile it should have pulled to ~6500. SO, you tell me what it should have done?! Probably should have run comparable to my '02, if not better? I "guess-timate" it made in the neighborhood of ~350-375 HP, ~400 lb-ft TQ.

 

Hey angel71rs, thats a sweet 69 Camaro I LOVE the 69`s a 69 Z28/ZL1/COPO/YENKO is my dream car, I`d take one over ANYTHING. I`d love to get 350hp outta my 350 is it possible if I went with a bigger cam?? or would my 305 heads be maxed with the cam I already have? I plan on running 2.5" daul exshust with cut outs and cats with 40 series Flowmasters. 10.5:1 cr is perfect I`ll still be able to use 94 oct. just wonderin do you know the gas mailage in the 69 Camaro, I`ll be usin a TH350 so it wont be great lol. oh and is this a good setup for torque??

Hey capn pete that musta sucked that your Zed wouldn`t run right at the track with those numbers she probly woulda hit around a very low 13 maybe high 12.9* I havn`t run my 85 at the track yet but I will next year. I havn`t even drove my 81 yet lol and I`ve owned it for a year. I`m also buildin a 383 but mines alittle more wild then yours was lol, mines gonna have 2.02 Bowtie heads, Victor jr intake, BG 750 and a soild roller cam, thats why I can`t spend much on my 350.

 

The heads would be too limiting to really benefit from a bigger cam. Give up low end torque with not much payoff up top. Since you are banking cash for a 383, probably better to save what you would spend on flat tops/bigger cam and just drive the 350. Just use shim head gaskets to max compression with the dished. Of course if it needs a rebuild, might as well use flat tops.

Mileage? you jest. But I would say it's not horrible if tuned right.

69 originally had a th350 w/stock converter. Torque was good, and once it got past 3,000 rpm, it really cooked. High compression and small ports really help torque. It has MT G60 SS soft compounds out back. Still kicked sideways when 2nd hit. It now has an M21 and traction is a problem.

69s are sweet cars for sure. I'm partial to 70-73 RS Camaros (shock, surprise), but 69s are a close 2nd. The car was originally my sister's. Bought it for 900 back in the day. Lime green (including the interior), 307. Blech! I put in the original 350 out of my 71, headers, Edelbrock/holley, duals, small torque cam, and she was humiliating 5.0 jockeys left and right.

 

first off what cc are the 305 heads that you are going to run
I'm running my 81 Z with the factory block but went to a set of 58cc heads with a mild port and polish job a comp cams 210 grind cam 2800 stall converter a edelbrock eps intake and 600 carb the 750 you are planing to run is much to big for the engine.download desk top dyno and play with the numbers a bit to find the combo that suits your needs but the combo im running is abou 345 hp but you also need to degree the cam for your aplication and where you want you tourque curve to be with the higher compresion im about 439 f lbs at 2800 rpm and 345 hp at 4800 but my cam is 3 degrees advanced.

 

I also agree that 750 would be too much for your combo. Since you're limited with $$$, you could find a set of vortec heads of a P/U. I picked up a set recently off a wrecked '97 1500 w/ 67k miles for $150. The heads and intake on your short block will put you in your desired HP range, usually around 300-330hp.

With a good intake and cam you could reach 390-400hp. Chevy High Performance did a build up and got around 390hp. The article also guides you on which casting numbers to look for, since some vortecs are casted to have more torque than hp, resulting in less flow (mainly found in the Work/Fleet Series, 2500, and 3500's).