So I'm getting deployed. In feb and amd putting my z28 together quick. I did some research on similiear setups to mine and can't find a close hp rating. Granted I knnow it won't be spot on but just ballpark figures lol

I have a 358 (.060 over 350) with -16cc dished speed pro pistons about 9.7:1 comp ratio 64cc procomp aluminum heads with 195cc intake runners 2.02 intake valves. Lunati bracket master 2 cam 458 lift intake and exhaust. Running 1.5 rollers up top. Brodix sp1 single plane intake holley 650dp edelbrock 1 3/4 short headers
Like I said id just be happy with ballpark figures. It seems to have all kinds of bottom end and its decently snappy (needs more tuning yet) its mated to a th350 not that it makes much diff on hp. Lol
Thanks for your time!

 

370ish? the combo is a little mismatched might be why your not finding a lot of info, zero decked and running a .015 shim head gasket on that?

 

Yeah its 0 decked and I'm pretty sure its .015 head gasket. I didn't really want the intake on it but its the only one I could come up with at the time. I knew it was mismatched. I just was sure on how baldy it was. What would you change but that's close to what I was thinking on power. Thank you

 

It could really benefit from a cam change to take advantage of the heads. From the numbers I've seen they flow well from .400 up. The cam that's in there is similar in specs to the Gm 290hp 8.5 comp crate to put it in perspective. With that big plenum it's probably lazy down low compared to what it could be with a rpm intake, and some 1.6 rockers would get some more lift out of what you have

 

So you thinkjust doing that could do a lot of the motor? What intake would you reccomend? It seems to run surprisingly good now but I haven't had it the strip or anything yet. And it doesn't rev too bad. Not super fast but not bad

 

.060 over is a 360" motor

Cam is alittle dated, there are better choices. Could use more compression too. I'd run a normal .039-.040 gasket if that block is zero decked even tho that will drop compression... your running extremely tight quench height. Not a concern for PTV clearance with a low lift cam like that, but its recommended to keep your piston to head clearance at .040" or so.

 

i was trying to keep it decently low comp so that i wouldnt have to run 93. if i go much more cam id have to go more compression too. like i said in leaving in feb for a year id like to have a mild motor to drive before winter. i want to build bigger when i get back. main thing i think that needs changed is intake. ill def be changing head gaskets when i redo the motor tho. and probably run flat tops. thank you

 

I couldn't understand how, with the big dish, 9.7 was possible till i ran some numbers,

 

yeah the thinner gasket makes it possible but thats very very thin. With lower compression, and that cam, a dual plane intake like performer RPM may be better suited. Its got a lazy lobe on it, 284 advertised, but only 218 deg at .050" lift. Doesnt have the capability of pulling the rpm needed for a single plane. So change the intake if you are not going to change the cam.

 

Alright ill look for a better suited intake I really appriciate it guys

 

Could use a more modern cam like the voodoo series from lunati or extreme energy grinds from Comp. Get the lift up abit more and it will wake up. The more aggressive lobes will fill the cylinder better in the mid range, giving you more torque/power and much better overall driveability

 

If I put a good dual plane on it and maybe 1.6 rockers do you think it would run a good bit better? I don't have a whole lot of money but have some friends who have parts I could get cheap

 

Yeah I think it would fit alot better with more lift and dual plane intake like performer RPM. Probably sell of the old manifold and have minimal investment in the other dual plane.

 

275 rwhp

 

What about a weiand stelth? I have heard good things about them and they are decent on price. Plus it kicks in at the same rpm as the cam