My future Chevy 350 400+ hp build for 1000 dollars

[83gbody]

Thanks but what size do u suggest

 

[richp85elco]

do you have stock dished pistons or flat tops? with 70cc and stock pistons your compression will be low like in the 8's range and your motor will be a dog with that cam..

 

[DoubleV]

ive got a street stock engine 350 bored 0.030 over (355) with flat top pistons w. 4 valve reliefs, stock rods, stock cast crank, a .504 lift cam, pbm performance hydrolic race lifters, stock stamped rockers, stock heads off a 400 block that have not been decked or had any machine work so the 1.94 valves are still in it. stock cast 2 barrel intake, and we can only run a 2 barrel carb at 500cfm, 1 inch carb spacer. saginaw 3 speed and 3.73 gears in the rear. it breaks the tires loose in second gear just idling down the road on pavement with soft dirt tires. throw a little bit bigger cam in there and raise ur compression and that combo should throw u back in the seat when u stomp it (depending on ur gears) but get ur compression too high and u will have to either run race gas or set ur timing to run pump gas, then its a real mother to start when its cold. as for ur bottom end, it should be able to handle it, i turn mine 6500 rpm down the straights. just dont rev the crap out of it

Not trying to bust your balls but seems to me you are comparing apples to oranges.

83, you need to verify what your actual CR will be and THEN choose a cam preferably by a good engine builder who knows Chevys. Those generic 'Summit' cams aren't the best out there.

What are goals for your car anyway? I don't recall you ever stating them.

 

[Mike P]

I’ll be a little more blunt than some of the folks here, I’m not trying to bust you’re balls just trying to give you a bit of advice. You have a pretty badly mismatched set of components and on a good day will have a lazy engine that will be lucky to break 300 HP at the flywheel with no accessories.

You cam and intake selection are much more conducive to a nice torquey motor with 1.94 heads, but your compression is a bit high for that.

The heads and carb would work well a lot more cam, higher compression (around 10:1 if you really want to make 400 hp). Of course now you would be talking about a motor with marginal street manners, that would require a stall convertor and deep gears to actually use the power the engine makes makes.

 

[crotchss]

83gbody, are the pistons you have 4 valve relief with a dish or 4 valve relief flattops? The dish with a 64cc chambered head will get you around 9:1, and the flattops will get you around 9.5:1 to 9.7:1. All of this depends on gasket thickness, deck height, etc. I would call some cam companies and talk with them about what you want to do and what parts you have. Howard's cams and others offer full kits that are rather cheap and would be better than the Summit cams IMO. If you are close to 9.7:1 - 10:1, you can easily still run on pump gas and break 400hp too and be well mannered on the street. Like jbracing said if the bottom end is in good condition it will easily handle the rpm that a streetable cam will operate in. I have built numerous engines for racers running hobby stock cars on the dirt and I used to circle track myself. We ran balanced stock rotating assemblies with ARP bolts, 2 barrel, and solid cams, turned them 6800 rpm all season and never had one pop. You'll definitely need some converter and gear if you want it to run hard and work well on the street. I'm not suggesting anything crazy, maybe a 2400 or so converter and a 3.42 or 3.73 gear. Also a 750 is a pretty big carb for that engine, I think it would have better manners with a 600-650 cfm carb.

 

[jbracing]

I'm just stating what I have and how it runs. Yes they are two slightly different animals but I was also trying to make the point that his bottom end should hold up. ESP if he either has or gets a forged crank and gets good studs in the bottom end and the rods checked for cracks. And as far as carb. A 750 would be a little much for that setup. ESP on the street. It would be happy at higher rps being able to flow that much but ur lower end of your opperating would suffer

 

[jbracing]

And keep in mind if you build for torque horsepower will come. If you build strictly for horsepower your torque may not be sufficient a balanced setup makes for an engine with great overall performance