opinion on hp

[blbs350]

hey, new to the site. i'm ready to build a 350 for my '92 and im thinking of the 300-350hp range but not solid on that #. i want to keep it streetable meaning fair mpg and decent street manners. what im looking for is the opinions of other members who are making this same power. are you satisfied with the perfomance, 1/4 mile times and pretty much any input you may have. i have a pretty good idea on the setup to aquire this kind of power but suggestions would great.

[blbs350]

hey, new to the site. i'm ready to build a 350 for my '92 and im thinking of the 300-350hp range but not solid on that #. i want to keep it streetable meaning fair mpg and decent street manners. what im looking for is the opinions of other members who are making this same power. are you satisfied with the perfomance, 1/4 mile times and pretty much any input you may have. i have a pretty good idea on the setup to aquire this kind of power but suggestions would great. also stories of what you have smoked on the road.

[muk]

what do you have so far? heads...block ...pistons.. intake...etc? that will help a bunch with decision making

[Rinkrat456]

Page through an Edelbrock catalog. Pick out as many things as you can labeled "Performer". Performer 650 carb, Performer intake, Performer heads, Performer camshaft...should get you one helluva street bruiser with monster torque. I'd expect 330hp, 380lb-ft of torque or so with all those parts and it'll be fun to drive on the streets.

[chris1972]

i agree with rinkrat456...its very easy to make 355 hpwith 9.0 or 9.5 comp..

[harleyboy]

I'm in agreement with that performer parts.

[blbs350]

muk, i have a 2 bolt block being bored .030, pistons are 9:1 w/64cc heads which are 882 castings. since im just getting started thats all i have but plan to use an edelbrock performer rpm intake and an edelbrock 600. im not sure on the cam yet but prob something around .450" lift. considering engine builds i have seen in mag. articles that should get me over 300 hp.

[Bakas]

id say 300 to 325 is the best your gonna get.

[chris1972]

the 882 heads have 72 cc or 76 cc can't remember ..are having them surface down more

[blbs350]

i didnt realize the 882 had such big comb. cham. no i wont be having them cut down. i want to keep this as simple and inexpensive as possible.i really want to keep comp. real close to 9:1. any suggestions on another set of factory heads. what comp. pistons would i need to end at 9:1 with 72cc or 76cc heads?

[chris1972]

got and get set of vortec heads and a vortec intake for an carb they have about 64cc

[hillbillymike]

882's are 1.94in 1.50ex valves 76cc chambers. You gotta have dome pistons to get higher compression. Speed pro H618CP (hypereutectic, 125 dome ) Are reasonably priced and will do good with those heads. Thats exactly what the motor in my car has with a comp extreme energy 274 cam(part # 12-246-3), performer rpm intake, 650 carb. That motor with a mild converter and a 3.73 gear is perfect dd street setup. imho.

[hillbillymike]

Oh, with 76cc chambers 125 domes get you about 9.4to1 without zero decking.

[stevo67]

I've got a set of 1969 heads, 70cc chambers, will get you about 9.2 compression with stock flat-top pistons. If you're near South East PA, and interested...PM me.

[blbs350]

michigan but thanks for the offer

[spacecadet]

The head swap is easier than a pision swap. I f you have to buy the intake anyways the vortecs would be t he best choice. If not a set of 186's w/65cc chambers would do you quite nice. THey are double humps w/ accorry bolt holes.

[chris1972]

vortec are more common then the 186's ..but 186 are a good head..

[harleyboy]

and there easier to find, plus little cheaper to me.

[chris1972]

if i remember they have screw in studs ..not sure

[RockinS10]

If your going with vortecs have a look at this thread I started. http://www.s10v8.com/showthread.php?t=1073757831
You should find a lot of info there. I'm building a 350 as well and went through the same thing. I now have a fresh set of vortecs and vortec performer intake ready to go. I have a .020 over bore, and flat top pistons. with vortecs it should be running 9.1 to 1.

If I were you I would go for the Vortecs, but not only will you need a different intake, but you will need self aligning rockers or have the heads modded like mine with guideplates and screw in studs. You can use standard rockers. You will need to use hardened push rods for that set-up.

Vortecs are also designed to be efficient at burning the fuel by swirling the mixture through the spark. Some say it will help keep you on regular octane even with higher compression.

There's also this thread where we discussed a cam that matched my original 441 76cc heads. http://www.s10v8.com/showthread.php?t=1073757783 if you decide to stick with the heads you have.

I still haven't chosen my cam

[chris1972]

now i remember they don't because they where adj.press it studs.rocker its the vortec 4.3 had the screw in studs

[blbs350]

spacecadet, i havent bought the pistons yet but i already have the heads(they came with the engine) so piston swap vs. heads swap is no issue.

[chris1972]

to much comp is a bad thing..

[blbs350]

i definately dont want much comp, only about 9:1. like i had said before i already have a pair of 882's and dont want to spend the extra money on another pair. im still wondering what pistons would give me close to 9:1 comp with the 74cc or 76cc comb chamb.(not sure which they are).