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Old 01-14-2009, 08:45 PM
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350, how much hp?

Hey everyone this is my first post on this website. I have possible the best uncle a person could have, who gave me a 1987 gmc s15 for my grad. It had a 350 but this winter i decided i wanted more power, so this is what i have.
1973, 2 bolt mains 350 ci.
eagle crank
wiseco flat top pistons
oliver rods 6"
comp cams xtreme energy hyd. roller cam .502/.510 lift, 106 centerline
edelbrock performer rpm al. heads
edelbrock performer rpm intake(air gap)
1.5 scorpion roller rockers
750 holley carb, vaccum secondaries
700r4, stage 2 shift kit
2800 stall
i'm wondering what this should make for hp, i'm hoping for 400+.. also, any guesses at a 1/4 time, its a s-15(2800 pnds) coil-overs w/ ladder bars, 31x10x15 inch slick and 355 gears.would switching to 373's be worth the loss of streetability for the track advantages, thanks! p.s my uncle showed me how to build the motor, and even helped me paint it!

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Old 01-14-2009, 08:52 PM
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sounds like a pretty hefty cam. the best way to find all this out.is to put it on a dyno and make a few passes down the track.some people can get pretty close.but there is only one true way to find out.but the set up dont sound to bad.but thats just one mans opinion. sounds like a pretty cool uncle (Ride on)
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Old 01-14-2009, 08:55 PM
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there is no dyno where i live and i'm only 18 so i don't have hte 500 dollars to put it on a dyno and the track is closed right now so i don't really have any way of knowing the exactg number so it sucks, just looking for a ball park figure
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Old 01-14-2009, 08:58 PM
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i can understand that.i would be afraid to take a guess but hang in there. i am sure someone on here will be able to tell you something close to what you want to know.this is a good site.wish i could help more.
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Old 01-14-2009, 09:50 PM
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Quote:
Originally Posted by haulinass-10
Hey everyone this is my first post on this website. I have possible the best uncle a person could have, who gave me a 1987 gmc s15 for my grad. It had a 350 but this winter i decided i wanted more power, so this is what i have.
1973, 2 bolt mains 350 ci.
eagle crank
wiseco flat top pistons
oliver rods 6"
comp cams xtreme energy hyd. roller cam .502/.510 lift, 106 centerline
edelbrock performer rpm al. heads
edelbrock performer rpm intake(air gap)
1.5 scorpion roller rockers
750 holley carb, vaccum secondaries
700r4, stage 2 shift kit
2800 stall
i'm wondering what this should make for hp, i'm hoping for 400+.. also, any guesses at a 1/4 time, its a s-15(2800 pnds) coil-overs w/ ladder bars, 31x10x15 inch slick and 355 gears.would switching to 373's be worth the loss of streetability for the track advantages, thanks! p.s my uncle showed me how to build the motor, and even helped me paint it!

This combo will make well into the 400s.

Hang on, I hope your uncle knows how to build suspension and brakes that will handle that power in an S-10/15. I've built a lot of these and keep one as my daily driver. My experience with these is that they are spooky from about 250 hp, and down right scary from 300 on up. So go someplace safe and learn its quirks before just hitting the street and nailing the throttle.

Bogie
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Old 01-14-2009, 10:06 PM
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yah he's a mechanic of over 15 years and he has a 67' c-10 with a blown 350 so he knows what he's doing. The setup will be strong enough i just hope it will hook. any suggestions on a 1/4 mile time?
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Old 01-14-2009, 10:30 PM
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you wont lose any streetability by changing gears.the 373 would be better than the 355 gears.i am running 373 gears in my camaro.i am running a 408 with over 500 hp.i drive mine on the street no problems. cole
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Old 01-15-2009, 06:12 PM
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Is this a 350 or a 383 ? What are the rest of the cam specs ? What are you doing for the exhaust on your truck ? I just recently built an engine for my Dad's S-10 and he ran the heck out of it until it got cold and the tracks closed. These are fun little trucks. Give me a little more info and I'll take a guess at your ET.
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Old 01-16-2009, 12:06 AM
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its a 350, i'm not sure on the rest of the specs cause i'm away for the winter playing hockey, i think the duration is 234 if that sounds right? i'll be runnin open headers when i'm at the track
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Old 01-16-2009, 02:16 AM
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You should make 420-450 hp. I think with that converter you shoul be in the mid to low 11's.
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Old 01-16-2009, 12:06 PM
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wow i was hoping for 400 hp and somewhere into the 12's, i'm just a newbie when it comes to engines so i really don't have a great idea on things, thanks for input!
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