...

Go Back   Lateral-g Forums > Technical Discussions > Engine
User Name
Password



Reply
 
Thread Tools Display Modes
  #1  
Old 10-21-2007, 06:22 PM
kovert kovert is offline
Member
 
Join Date: Oct 2007
Location: Santa Fe NM
Posts: 84
Thanks: 0
Thanked 0 Times in 0 Posts
Default what hp will a 350 4 bolt main take

im kinda new to working on chevy..i am working on doin a chevy project and a mopar any way what kind of power do the 350 factory chevy 4 bolt main blocks take if suited with the proper internals???

i know the factory ford production hydr roller 302 block will take between 500rwhp and 600rw and thats a 2 bolt main...



the 350 will be grouped with 2 turbos so im trying to figure out if i need a aftermarket block or if the factory 350 4 bolt will work
Reply With Quote
  #2  
Old 10-21-2007, 07:48 PM
camcojb's Avatar
camcojb camcojb is offline
Administrator
 
Join Date: Jul 2004
Location: Wilton, CA.
Posts: 13,242
Thanks: 6,690
Thanked 2,070 Times in 946 Posts
Default

Quote:
Originally Posted by kovert
im kinda new to working on chevy..i am working on doin a chevy project and a mopar any way what kind of power do the 350 factory chevy 4 bolt main blocks take if suited with the proper internals???

i know the factory ford production hydr roller 302 block will take between 500rwhp and 600rw and thats a 2 bolt main...



the 350 will be grouped with 2 turbos so im trying to figure out if i need a aftermarket block or if the factory 350 4 bolt will work
what is your hp goal?

Jody
__________________
Jody

PAST CAR PROJECTS

Like Lateral-G on Facebook!

Follow Lateral-G on Instagram!

SPECIAL THANKS TO:
Jacob Ehlers and Amsoil for the lubricants and degreasers for my 70 Chevelle project
Shannon at Modo Innovations for the cool billet DBW bracket
Roadster Shop for their Chevelle SPEC Chassis
Dakota Digital for their Chevelle HDX Gauge Package
Painless Performance for their wiring harness

Ron Davis Radiators for their radiator and fan assembly.
Baer Brakes for their front and rear brakes

Texas Speed and Performance for their 427 LS Stroker
American Powertrain for their ProFit Magnum T56 kit
Currie Enterprises for their 9" Third Member
Forgeline for their GF3 Wheels
McLeod Racing for their RXT street twin clutch
Ididit for their steering column
Holley for their EFI and engine parts
Lokar and Clayton Machine for their pedals and door and window handles
Morris Classic Concepts for their 3 point belts and side mirrors
Thermotec for their heat sleeve and sound deadening products
Restomod Air for their Tru Mod A/C kit
Mightymouse Solutions for their catch can
Magnaflow for their 3" exhaust system
Aeromotive for their dual Phantom fuel system
Vintage Air for their new Mid Mount LS front drive
Hydratech Braking for their hydroboost system
Borgeson for their stainless steering shaft and u joints
Eddie Motorsports for their hood and trunk hinges and misc parts
TMI Products for their seats, door panels, and dash pad
Rock Valley Antique Auto Parts for their stainless fuel tank
Reply With Quote
  #3  
Old 10-21-2007, 08:17 PM
Blown353 Blown353 is offline
Senior Member
 
Join Date: Nov 2004
Location: Central Valley, CA
Posts: 925
Thanks: 0
Thanked 88 Times in 34 Posts
Default

If you're starting fresh and running turbos I'd strongly recommend a good aftermarket block. There is no reason not to do it right from the get-go. Cheaper to build it once!

A stock block will take quite a bit of power but an aftermarket block with thicker cylinder walls will make more power even when everything else is equal because the thicker bores don't flex as much and the rings seal better. The more cylinder pressure you throw at it the more pronounced this becomes.

My car is making about 650 or so HP at the rear wheels using a .020 over stock 010 4-bolt block (studded) and has zero issues even with quite a few miles on it now. Things looked great last time I had it apart. However when I build a bigger cube shortblock it will be with a Dart block.
__________________
1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.

Last edited by Blown353; 10-21-2007 at 08:35 PM.
Reply With Quote
  #4  
Old 10-22-2007, 09:21 AM
Scotch Scotch is offline
Senior Member
 
Join Date: Mar 2005
Posts: 171
Thanks: 0
Thanked 0 Times in 0 Posts
Default

With proper prep and machining, I've seen 350 4-bolt blocks approach 1,000 hp. They didn't have to LIVE there, but they could touch it without exploding.

"Proper Prep" includes complete "hot" machining done at 200 degrees F, aftermarket billet steel main bearing caps, ARP main bearing studs, Hard Blok up to the freeze plugs, and top-quality components throughout (billet crank, rods, etc.)

The block should be magnafluxed and sonic tested prior to starting anything, and either cryo treated or vibration treated before machining. Doing both wouldn't hurt.

~SP~
Reply With Quote
  #5  
Old 10-22-2007, 09:36 AM
deuce_454's Avatar
deuce_454 deuce_454 is offline
Senior Member
 
Join Date: May 2006
Location: Copenhagen, Denmark
Posts: 1,612
Thanks: 0
Thanked 1 Time in 1 Post
Default

why not get a schafiroff power-adder long block.... it is built for boost and you wont have to modify the crap out of a stock SBC... and it propaby costs less too
__________________
Elwood:We're 105 miles from Chicago, we have a full tank of gas, half pack of cigarettes, it's dark out and we're wearing sunglasses.
Jake: Hit it.
Reply With Quote
  #6  
Old 10-22-2007, 09:40 AM
badmatt's Avatar
badmatt badmatt is offline
Senior Member
 
Join Date: Oct 2007
Location: winnipeg
Posts: 725
Thanks: 0
Thanked 0 Times in 0 Posts
Default

io know of a stock block with billet caps and a half fill living to 1200RWHP
Reply With Quote
  #7  
Old 10-22-2007, 11:09 AM
kovert kovert is offline
Member
 
Join Date: Oct 2007
Location: Santa Fe NM
Posts: 84
Thanks: 0
Thanked 0 Times in 0 Posts
Default

the car will be a street driven car so i dont think filling the block will be smart at all for cooling.. my goals ide like to make around 700 to 800 rwhp ..

im kind of on a budget which is no good for building high hp engines but the aftermarket blocks that i have found seem to be 1500+ dollars which i can pick up a factory 4 bolt from a friend for 300 thats a big diffarence in pricing if you guys know of a place to get cheaper aftermarket blocks please let me know i would love to make 1000hp with a aftermarket block but 1500 is not gonna happen for me after machining decking etc those blocks are even more...
Reply With Quote
  #8  
Old 10-22-2007, 11:16 AM
badmatt's Avatar
badmatt badmatt is offline
Senior Member
 
Join Date: Oct 2007
Location: winnipeg
Posts: 725
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by kovert
the car will be a street driven car so i dont think filling the block will be smart at all for cooling.. my goals ide like to make around 700 to 800 rwhp ..

im kind of on a budget which is no good for building high hp engines but the aftermarket blocks that i have found seem to be 1500+ dollars which i can pick up a factory 4 bolt from a friend for 300 thats a big diffarence in pricing if you guys know of a place to get cheaper aftermarket blocks please let me know i would love to make 1000hp with a aftermarket block but 1500 is not gonna happen for me after machining decking etc those blocks are even more...
run a bigger oil cooler...
Reply With Quote
  #9  
Old 10-22-2007, 12:34 PM
camcojb's Avatar
camcojb camcojb is offline
Administrator
 
Join Date: Jul 2004
Location: Wilton, CA.
Posts: 13,242
Thanks: 6,690
Thanked 2,070 Times in 946 Posts
Default

[QUOTE=kovert]the car will be a street driven car so i dont think filling the block will be smart at all for cooling.. my goals ide like to make around 700 to 800 rwhp ..

im kind of on a budget which is no good for building high hp engines but the aftermarket blocks that i have found seem to be 1500+ dollars which i can pick up a factory 4 bolt from a friend for 300 thats a big diffarence in pricing if you guys know of a place to get cheaper aftermarket blocks please let me know i would love to make 1000hp with a aftermarket block but 1500 is not gonna happen for me after machining decking etc those blocks are even more...[/QUOTE]


too high for a stock block if you want longevity. Yeah, it'll last some amount of time, but you're definitely beyond what that block was engineered for.

Put it this way, you will spend way more than the $1200 difference if/when you break it and have to replace it and all the parts you lose in the process.

I'm sure you realize that $300 block will need all the machining that the aftermarket block does, if not more.
Jody
__________________
Jody

PAST CAR PROJECTS

Like Lateral-G on Facebook!

Follow Lateral-G on Instagram!

SPECIAL THANKS TO:
Jacob Ehlers and Amsoil for the lubricants and degreasers for my 70 Chevelle project
Shannon at Modo Innovations for the cool billet DBW bracket
Roadster Shop for their Chevelle SPEC Chassis
Dakota Digital for their Chevelle HDX Gauge Package
Painless Performance for their wiring harness

Ron Davis Radiators for their radiator and fan assembly.
Baer Brakes for their front and rear brakes

Texas Speed and Performance for their 427 LS Stroker
American Powertrain for their ProFit Magnum T56 kit
Currie Enterprises for their 9" Third Member
Forgeline for their GF3 Wheels
McLeod Racing for their RXT street twin clutch
Ididit for their steering column
Holley for their EFI and engine parts
Lokar and Clayton Machine for their pedals and door and window handles
Morris Classic Concepts for their 3 point belts and side mirrors
Thermotec for their heat sleeve and sound deadening products
Restomod Air for their Tru Mod A/C kit
Mightymouse Solutions for their catch can
Magnaflow for their 3" exhaust system
Aeromotive for their dual Phantom fuel system
Vintage Air for their new Mid Mount LS front drive
Hydratech Braking for their hydroboost system
Borgeson for their stainless steering shaft and u joints
Eddie Motorsports for their hood and trunk hinges and misc parts
TMI Products for their seats, door panels, and dash pad
Rock Valley Antique Auto Parts for their stainless fuel tank
Reply With Quote
  #10  
Old 10-22-2007, 01:51 PM
Scotch Scotch is offline
Senior Member
 
Join Date: Mar 2005
Posts: 171
Thanks: 0
Thanked 0 Times in 0 Posts
Default

[QUOTE=kovert]the car will be a street driven car so i dont think filling the block will be smart at all for cooling..

I've seen cars run filled blocks on the street, but they were filled only to the bottom of the freeze plugs and had killer cooling systems for both coolant and oil.


my goals ide like to make around 700 to 800 rwhp ..

There are lots of ways to do that. Now, how are you going to put all of it to the ground?

im kind of on a budget which is no good for building high hp engines but the aftermarket blocks that i have found seem to be 1500+ dollars which i can pick up a factory 4 bolt from a friend for 300 thats a big diffarence in pricing if you guys know of a place to get cheaper aftermarket blocks please let me know i would love to make 1000hp with a aftermarket block but 1500 is not gonna happen for me after machining decking etc those blocks are even more...


If I could offer some advice, I'd say go with the $300 block and make 500 hp with it. It can take that without trouble. Get the car dialed in so it can use every one of those 500 horses, and you can learn to drive it with that level of power. Then, look into building another engine with the aftermarket block.

Why build a 750 RWHP car that can only put 350 horses to the ground? Dialing in your suspension and getting traction is harder than making horsepower with a small-block Chevy. Get the hard part figured out first, and then turn up the wick on the easy part.

~SP~
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 04:27 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Lateral-g.net