Chevy 350 build help
January 20th, 2013, 03:52 PM
#1
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Chevy 350 build help
I have a 4-bolt main Chevy 350 at the machine shop bored 60 over. I bought a set of flat top Speed Pro cast pistons for it.
The heads are #3932441 76cc combustion chambers
I plan on running a stock HEI, an Edelbrock 4-barrel carb, and an aftermarket cam/valve springs.
I am wondering how much HP/TQ I could get out of it with stock heads and intake/exhaust manifolds.
The heads are #3932441 76cc combustion chambers
I plan on running a stock HEI, an Edelbrock 4-barrel carb, and an aftermarket cam/valve springs.
I am wondering how much HP/TQ I could get out of it with stock heads and intake/exhaust manifolds.
January 20th, 2013, 04:08 PM
#4
Proud Viet Nam Veteran
Join Date: Dec 2006
Location: Rowlett, TX
Posts: 9,945
My apologies. I doubt you are going to get much help there. There are a lot of us on here that have built Chevys but it has been a long time for me. I hope somebody can help. One of the Chevy sites is still probably going to be your best bet.
January 20th, 2013, 04:14 PM
#5
Registered User
Join Date: Nov 2011
Posts: 18
Somewhere between 250 and 300 HP range. The heads don't flow the best and 76cc will keep your compression at the low level. A good set of heads will wake it up. Try your luck at http://www.chevelles.com
January 20th, 2013, 04:14 PM
#6
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
No problem. I figured I'd ask here before I went out and made an account at a Chevy site. Just throwing it out there.
January 20th, 2013, 04:31 PM
#7
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Somewhere between 250 and 300 HP range. The heads don't flow the best and 76cc will keep your compression at the low level. A good set of heads will wake it up. Try your luck at http://www.chevelles.com
January 21st, 2013, 08:34 PM
#9
Registered User
Join Date: Dec 2012
Location: South Florida
Posts: 41
Definitely not over 300 with stock intake/exhaust manifolds. There's no point in doing an aftermarket cam either. A stock chevy 350 can come really benefit with just aftermarket intake/exhaust. I would go that route before changing any internals, especially if you are running higher compression and .060 over.
January 22nd, 2013, 03:13 PM
#10
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Definitely not over 300 with stock intake/exhaust manifolds. There's no point in doing an aftermarket cam either. A stock chevy 350 can come really benefit with just aftermarket intake/exhaust. I would go that route before changing any internals, especially if you are running higher compression and .060 over.
January 22nd, 2013, 03:17 PM
#11
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
January 22nd, 2013, 03:17 PM
#12
"Car"mudgeon
Join Date: Feb 2011
Location: Perry, GA
Posts: 5,191
Tons of helpful info here as well as great feedback to most all questions that you may ask. As many of these questions have been asked before it is always a good idea to do a search and if you can't find it that way, the folks are always eager to help.
January 22nd, 2013, 06:17 PM
#14
Get a 350 hp 327 cam that'll bring it too life The 350HP-327 cam was used in tens of thousands or even hundreds of thousands of daily drivers. After it was developed it was found to be the best compromise between HP and efficiency and used in many Chevy applications without making a big hoopla about its 350HP origins.
In perhaps plainer English it began as a hot rod factory cam and ended as a stock cam for much of production.
In perhaps plainer English it began as a hot rod factory cam and ended as a stock cam for much of production.
January 22nd, 2013, 06:34 PM
#15
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Get a 350 hp 327 cam that'll bring it too life The 350HP-327 cam was used in tens of thousands or even hundreds of thousands of daily drivers. After it was developed it was found to be the best compromise between HP and efficiency and used in many Chevy applications without making a big hoopla about its 350HP origins.
In perhaps plainer English it began as a hot rod factory cam and ended as a stock cam for much of production.
In perhaps plainer English it began as a hot rod factory cam and ended as a stock cam for much of production.
January 22nd, 2013, 06:50 PM
#16
Well don't forget the factory rated hp without power robbing accessories back in the day, so that 300hp was at the crank not at the wheels .Shouldn't be a problem achieving that goal nowadays with proper block prep and machining .I had a 67 Chevy 2 when I was younger and built up a big 6 cylinder for it and that engine hauled in around very smartly ,wasn't 300 hp but I bet I had 250-275hp with a 4 bbl Clifford manifold and a 600 Holley and headers ,sounded like a big bumble bee !Anyways a 350 will be fun in that light car.
January 23rd, 2013, 11:40 PM
#19
Registered User
Join Date: May 2009
Location: USA
Posts: 2,200
76cc ?? It will be a pig. This is coming from a Chevy engine fan mind you.
Late 70's Chevy pig motors with 170-195hp / 300ft lbs of torque. That's about it.
They're still selling them as 260hp (GROSS) motors.
http://www.jegs.com/i/GM-Performance...67353/10002/-1
But once you put on all the accessories, and actually get it INTO the car, it's NET hp rating is <200hp.
It's not even worth the effort unless you just want to get the car running to sell it.
Investing $$ into a weak motor build like that isn't very fruitful.
Key to HP is head flow.
Your better off tossing the worthless heads, buying aftermarket heads that actually flow air.
However, by the time you invest all that $$$ into an old technology engine, you will realize
you could have just bought a scrapyard LS drivetrain with overdrive for the same investment with more HP.
Late 70's Chevy pig motors with 170-195hp / 300ft lbs of torque. That's about it.
They're still selling them as 260hp (GROSS) motors.
http://www.jegs.com/i/GM-Performance...67353/10002/-1
But once you put on all the accessories, and actually get it INTO the car, it's NET hp rating is <200hp.
It's not even worth the effort unless you just want to get the car running to sell it.
Investing $$ into a weak motor build like that isn't very fruitful.
Key to HP is head flow.
Your better off tossing the worthless heads, buying aftermarket heads that actually flow air.
However, by the time you invest all that $$$ into an old technology engine, you will realize
you could have just bought a scrapyard LS drivetrain with overdrive for the same investment with more HP.
Last edited by Aceshigh; January 23rd, 2013 at 11:44 PM.
January 24th, 2013, 06:30 AM
#20
Administrator
Join Date: Oct 2009
Location: Poteau, Ok
Posts: 40,551
Those are the standard 1.96 heads, I prefer the 2.02's for sbc but they will work fine for a cruiser. With a bit of milling and a thin head gasket, that cam, headers, 600cfm carb and dual plane intake - 300 horse.
Last edited by oldcutlass; January 24th, 2013 at 06:35 AM.
January 24th, 2013, 11:00 AM
#21
Hey have a look at the specs of this crate engine ,makes 330hp@5000 ,380ftlbs@3800 -http://www.crateenginedepot.com/350-Crate-Engine-330-HPBase-HO-with-Iron-Vortec-Heads-19210007-P9417.aspx
January 24th, 2013, 10:37 PM
#22
Registered User
Join Date: Dec 2012
Location: South Florida
Posts: 41
January 27th, 2013, 01:21 PM
#23
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
76cc ?? It will be a pig. This is coming from a Chevy engine fan mind you.
Late 70's Chevy pig motors with 170-195hp / 300ft lbs of torque. That's about it.
They're still selling them as 260hp (GROSS) motors.
http://www.jegs.com/i/GM-Performance...67353/10002/-1
But once you put on all the accessories, and actually get it INTO the car, it's NET hp rating is <200hp.
It's not even worth the effort unless you just want to get the car running to sell it.
Investing $$ into a weak motor build like that isn't very fruitful.
Key to HP is head flow.
Your better off tossing the worthless heads, buying aftermarket heads that actually flow air.
However, by the time you invest all that $$$ into an old technology engine, you will realize
you could have just bought a scrapyard LS drivetrain with overdrive for the same investment with more HP.
Late 70's Chevy pig motors with 170-195hp / 300ft lbs of torque. That's about it.
They're still selling them as 260hp (GROSS) motors.
http://www.jegs.com/i/GM-Performance...67353/10002/-1
But once you put on all the accessories, and actually get it INTO the car, it's NET hp rating is <200hp.
It's not even worth the effort unless you just want to get the car running to sell it.
Investing $$ into a weak motor build like that isn't very fruitful.
Key to HP is head flow.
Your better off tossing the worthless heads, buying aftermarket heads that actually flow air.
However, by the time you invest all that $$$ into an old technology engine, you will realize
you could have just bought a scrapyard LS drivetrain with overdrive for the same investment with more HP.
I just want to get it running well, and with minimal effort.
I'd really like to run the Vortec heads, but they are kind of a hassle. They need self aligning rockers and can't take much valve lift in stock form. They are a great head for the money, and I know people who have ran quick 1/4 mile times after bolting them on. They also won't work with stock manifolds and I need to run stockers because the Nova has such narrow shock towers.
Last edited by VinMichael; January 27th, 2013 at 01:32 PM.
January 27th, 2013, 05:02 PM
#24
Administrator
Join Date: Oct 2009
Location: Poteau, Ok
Posts: 40,551
Even with the standard exhaust manifolds, a little lopey cam sounds great for a cruiser. It does not have to burn down the 1/4, it just needs to sound nice and be dependable. Let us know how it goes.
December 22nd, 2013, 08:25 AM
#26
76 cc heads with flat or dish pistons??flattop about 9 to one compression, 8 to one with dish. I have been racings 350,s for over 40 years. my e mailkyzercd71@yahoo.com
December 23rd, 2013, 05:40 AM
#27
the 330 hp crate motor which I have is also sold as a 350 hp to racers, identical specs. The 330 cam is a good cam, but I ran a 327 350 hp cam in three diff cars. Has a good lope and pulls well even in tow vehicles. I put a crower cam in mine so it will lope thru car gathering at burger king
January 13th, 2014, 04:47 PM
#28
Registered User
Thread Starter
Join Date: Mar 2011
Posts: 558
Well I sold the car I was gonna put this engine in. However, I'm still planning to build it. I want to maybe put it in the Olds.
I've been looking into Vortec heads for it. I've learned that they need self aligning rocker arms and should probably need to be machined for lifts bigger than .480".
Maybe I'll have a 12 second car with this engine?
I've been looking into Vortec heads for it. I've learned that they need self aligning rocker arms and should probably need to be machined for lifts bigger than .480".
Maybe I'll have a 12 second car with this engine?
March 13th, 2014, 01:55 PM
#30
engine
you can run the 350 hp, 327 heads without maching the rocker studs. the cam that comes with the 330 hp 350 has a good set of specs. I sold the cam out my 330 hp and went with a crower just for a little more lope, had to have studs cut a little. ran a set hopped up vortec heads from brezenski and won 3 track championships with this motor. it would turn 7300 and still be pulling, although they were highly modified. had 194,s and 160 exaust in them,
Last edited by 49olds 88; March 13th, 2014 at 01:58 PM.
March 13th, 2014, 02:09 PM
#32
MOTORHEAD
Join Date: Feb 2011
Location: minnesota USA
Posts: 6,612
Yeah I know, but headers for these cars are a PITA and are expensive.
The idea is basically to get a motor together and get this car running. I can always put new heads and exhaust on the car later, so what you said about investing money into this engine being a bad idea really doesn't make sense. I never even stated what part of the engine I'm spending my money on. I'm just trying to get the most out of what I have and get the car to run the best that it can given what I have. And I'm definately not putting an LS engine in it. lol
I just want to get it running well, and with minimal effort.
Thanks for the input man, that's the type of info I'm looking for.
I'd really like to run the Vortec heads, but they are kind of a hassle. They need self aligning rockers and can't take much valve lift in stock form. They are a great head for the money, and I know people who have ran quick 1/4 mile times after bolting them on. They also won't work with stock manifolds and I need to run stockers because the Nova has such narrow shock towers.
The idea is basically to get a motor together and get this car running. I can always put new heads and exhaust on the car later, so what you said about investing money into this engine being a bad idea really doesn't make sense. I never even stated what part of the engine I'm spending my money on. I'm just trying to get the most out of what I have and get the car to run the best that it can given what I have. And I'm definately not putting an LS engine in it. lol
I just want to get it running well, and with minimal effort.
Thanks for the input man, that's the type of info I'm looking for.
I'd really like to run the Vortec heads, but they are kind of a hassle. They need self aligning rockers and can't take much valve lift in stock form. They are a great head for the money, and I know people who have ran quick 1/4 mile times after bolting them on. They also won't work with stock manifolds and I need to run stockers because the Nova has such narrow shock towers.
I have stock cast iron exhaust manifolds on my truck with vortec heads. If you keep the lift to .474 or so the factory springs are fine
November 22nd, 2014, 06:28 PM
#33
Registered User
Join Date: Jun 2014
Posts: 22
I have a 350 and it has stock compresion pistons, and bored .040 over. I put a set of vortec heads on it and this cam.http://www.summitracing.com/parts/cr...make/chevrolet
it runs really good, very nice acting cam, 600 edelbrock carb, but I had headers. You can run stock exhaust but it will breath better with heders. Stock converter, aftermarket intake. I dont know if its over 300 HP but its very close.
I had the heads rebuilt and the valve guides cut down to allow a higher lift cam, new springs and seals, you can pretty much buy vortech heads from summit ready to go with a high lift ready set up as cheap as buying used heads and rebuilding them nowdays.
it runs really good, very nice acting cam, 600 edelbrock carb, but I had headers. You can run stock exhaust but it will breath better with heders. Stock converter, aftermarket intake. I dont know if its over 300 HP but its very close.
I had the heads rebuilt and the valve guides cut down to allow a higher lift cam, new springs and seals, you can pretty much buy vortech heads from summit ready to go with a high lift ready set up as cheap as buying used heads and rebuilding them nowdays.
Last edited by schoenchen144; November 22nd, 2014 at 06:35 PM.
Thread
Thread Starter
Forum
Replies
Last Post
moys71
General Discussion
10
February 16th, 2021 08:22 PM
