Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> Does anyone have any suggestions on pistons for a Chevy 350?
User Name
Password
lost password?   |   register now

Thread: Does anyone have any suggestions on pistons for a Chevy 350? Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
01-07-2010 11:06 AM
cobalt327
Quote:
Originally Posted by DEMONSPEED
I'm going to go ahead and say thank you to all of you that have helped so far before I forget. http://www.summitracing.com/parts/STL-H345NP20/ So given the info I have gathered from you all how do these sound?
Looks OK to me. I don't know if they're available for less somewhere else, but the piston itself looks good.

The spec: "Compression Distance (in) 1.560 in." is an important one- this means that the quench distance will automatically be 0.020" 'better' ( higher in the bore at TDC) than if you used rebuilder-type cast pistons that often have a 1.540" compression height.

Keep this spec in mind so you can tell the machine shop, should you have the block decked. It'll make a difference as to the amount of material that needs to be removed to get the quench right.
01-07-2010 02:58 AM
DEMONSPEED I'm going to go ahead and say thank you to all of you that have helped so far before I forget. http://www.summitracing.com/parts/STL-H345NP20/ So given the info I have gathered from you all how do these sound?
01-07-2010 02:16 AM
327NUT I'm sending you a PM on a good place to buy engine parts. By the way and I know you're 15 but these guy's have been there ...done that, they're giving you good advice. Build a nice dependable. streetable engine the first time, you can and WILL build a bigger one as you get older.
01-07-2010 01:57 AM
cobalt327
Quote:
Originally Posted by DEMONSPEED
There's really not a difference in power? I figured the few cubic inches would have a small effect on power.
The increase will be minuscule. I'd take the thicker cylinder walls any day.

Quote:
The reason I was asking about the dished or FT pistons was because I have a large combustion chamber, around 76cc I think. I can't find 305 heads or I would go with them. Right now I have supposedly the worst casting GM heads around.
I wouldn't buy domed pistons just to use those heads w/high test. No return on the money spent, power-wise. I'd instead use FT pistons and cheap gas- until my budget will allow Vortec's or something.
01-07-2010 01:44 AM
DEMONSPEED There's really not a difference in power? I figured the few cubic inches would have a small effect on power. The reason I was asking about the dished or FT pistons was because I have a large combustion chamber, around 76cc I think. I can't find 305 heads or I would go with them. Right now I have supposedly the worst casting GM heads around. I've got a Lunati .515"/.515" cam and I was going to run 93 octane gas.
01-07-2010 12:51 AM
cobalt327
Quote:
Originally Posted by DEMONSPEED
The machine shop called me and told me my motor has to be bored a minimum of .20 over to get everything straight. I'm wanting to go .40 over to a 357-358 and i need a set of decent pistons.
Rob, if the block will clean up at 0.020" over, go w/that. There's no point to go w/a larger than needed oversize- there's no difference in power, and the smaller overbore will make for a more durable engine.

The 'best' piston for this case is a likely going to be a flat top, if you are starting w/a clean slate. You can use FT pistons and choose the cylinder head's chamber size to make the CR you need to go w/the camshaft that's going to be used, as well as what gas you plan to use.

But this can change if the heads you are going to use don't have the 'ideal' chamber size. Then, dished or domed pistons may be called for.

It's a balancing act. Everything is interrelated.
01-06-2010 11:56 PM
DEMONSPEED Ok i did not know higher than 10:1 requires higher than 93 fuel. I found a few piston and ring kits. What is better dished or flat tops?
01-06-2010 11:24 PM
DoubleVision Chevy 350 pistons come in all types, sizes, materials, you name it. Your talking about the most popular engine in the world. Speed pro hyper pistons fill the bill nicely for a street engine. I wouldn`t be looking for the highest compression ratio either, unless you are ready to run race gas. anything over 10:1 will require higher than 93 octane fuel. Summit racing carries a complete line of speed pro pistons. If you look at the chart it will give you the idea of what compression ratio and etc. the piston will give with the current specs.
01-06-2010 10:50 PM
DEMONSPEED
Does anyone have any suggestions on pistons for a Chevy 350?

Thank you for reading. Heres the deal, The machine shop called me and told me my motor has to be bored a minimum of .20 over to get everything straight. I'm wanting to go .40 over to a 357-358 and i need a set of decent pistons. I'm wanting to spend around $120 dollars or preferably less for a set. I do not know what to look for when buying a piston. All i know is i want the highest compression possible. They have to be at least as good as stock which was around 9:6:1. Preferably 10:1 or better. If anyone on here could help me out i would really appreciate it. Thanks in advance, Rob.

Posting Rules
You may post new threads
You may 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


All times are GMT -6. The time now is 03:04 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.