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#1 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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correct stock piston for a 230??
http://m.ebay.com/itm/311383036329
Or http://m.ebay.com/itm/311253977358 Just need 1 for 230 replacement 1 states 1/16 ring instead of 5/16?? |
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#2 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
Your engine a 230 or a 250? Both pistons mentioned are for 250's but I'm wanting to be sure. lol
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#3 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
It's a 230 but these are the only ones I've seen correct with D on the flat top
Were 230 pistons different and do I have a 250? I'm pretty sure it's a 230 unless it was end of 65 model year that they put in 250s |
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#4 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
I've never actually gotten a "fact" label on this, but I believe 230 pistons were flat tops. 250's and 292's used the .300 dish pistons. If you can get me an engine number from the block I may be able to decode it. Unless you have already.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#5 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
Block behind motor mount ..3877178 GM 48... Chevrolet / Buick / Oldsmobile / Pontiac / GMC 230, 250 62 – 78
Head between #1-#2 ..4886F7 Intake..385938 GM 17 |
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#6 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
I'm leaning towards a 250. Bores are the same for both engines, but strokes are different. The 250 being longer. The 230 has a taller compression height of 1.795 as to the 250 at 1.655. That's why I'm also sure the 230 has flat tops. I'm thinking yours is a 250. Let me make a call to a fellow inliner and I'll get a for sure answer.
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1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#7 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
You have a 250 and you'll want the piston with the 5/16 rings. The 230 has a flat top with valve reliefs and the 250 has the dish piston. If you were to put 250 pistons in a 230 your compression would drop. The piston with the 1/16 ring must be a newer design or something. My racing pistons in my 292 have that same ring size.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#8 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
crazy! all ive read says 250 wasnt in the 65 pickup
guess ill be looking for one of those then with head off can you measure at TDC from piston to head surface to determine stroke? or to measure anything of value? |
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#9 |
Registered User
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
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Re: correct stock piston for a 230??
You are correct. The 1965 C10 did not have a 250ci. If you need 230 pistons, I have 6 230 pistons that I saved from my 1965 230ci. You are welcome to have them all or however many you want - FREE. Send me a PM. I can post a picture of my 230 pistons if you want me to.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild. |
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#10 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
Yeah, measure from the top of the piston to the top of the cylinder and that'll get you pertty close.
250 stroke is 3.530 230 stroke is 3.250 So estimate 3 and a 1/2 or 3 and a 1/4. Anyone could have changed the motor out through the years. ![]()
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#11 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
Piston in question
Do the ones you have look like this? This style I mean |
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#12 |
Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: correct stock piston for a 230??
Since you have the head off. Just measure distance from deck to piston at bottom of the stroke.
230 = 3.250" ... 250 = 3.530"
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1969 c-10 Step Side Long Bed. I-6 250cid = ![]() |
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#13 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
Had
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#14 |
Registered User
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
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Re: correct stock piston for a 230??
These came out of my 230ci. You are welcome to have them but they do not look like yours.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild. |
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#15 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: correct stock piston for a 230??
Boy my curiosity is peaked now.....wonder if using 230 pistons in a 250 would boost compression. Rod length may need to be changed, but I haven't heard of anyone doing it yet.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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#16 |
Registered User
Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,927
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Re: correct stock piston for a 230??
I was gonna get a 250 built. Everyone said to use 307 flat top pistons and deck the head and go bigger valves. I got a practically new 230 for dirt cheap so budget minded common sense won over and I'll use the 230.
__________________
My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild. |
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#17 |
Registered User
Join Date: Oct 2014
Location: new orleans
Posts: 302
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Re: correct stock piston for a 230??
Going to get piston ring it put it in
Checking what I can, resealing what I can but nothing more at the moment |
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#18 |
Post Whore
![]() Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
|
Re: correct stock piston for a 230??
That's the one big advantage of the 250 is that 307 pistons. They are alot cheaper than the Ross pistons. lol
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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