boring out a 350
Moderator
Joined: Jan 2000
Posts: 20,981
Likes: 11
From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
.010 overbore: 351.6 ci
.020 overbore: 353.4 ci
.030 overbore: 355.1 ci
.040 overbore: 356.9 ci
.050 overbore: 358.6 ci
.060 overbore: 360.4 ci
.020 overbore: 353.4 ci
.030 overbore: 355.1 ci
.040 overbore: 356.9 ci
.050 overbore: 358.6 ci
.060 overbore: 360.4 ci
Supreme Member
Joined: Nov 2000
Posts: 1,069
Likes: 1
From: So. Cal, L.A.
Car: '88 Firebird Formula 350
Engine: Built 383 TPI
Transmission: Built 700r4
Axle/Gears: 9 bolt, 3.27:1 Posi
Forget the 10 20 and 50 overbores. It's not done.
------------------
'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4
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'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4
Supreme Member
Joined: Jul 1999
Posts: 1,294
Likes: 1
From: was: Palmdale, Ca
Car: was: 1984 Camaro Z28
Engine: was: L69
Transmission: was: 700-R4
And, I can't stress this enough, don't overbore just to overbore or to gain horsepower. That is very bad pratice, only overbore if the block really needs it and to the next standard oversize needed.
------------------
George P. Lara
Z28s Owned:
1984 "L69" A4
1994 LT1 M6
Member: SCCA, SCFB, SC3GFB
Camaro Info: MadMike's
[This message has been edited by MRZ28HO (edited January 11, 2001).]
------------------
George P. Lara
Z28s Owned:
1984 "L69" A4
1994 LT1 M6
Member: SCCA, SCFB, SC3GFB
Camaro Info: MadMike's
[This message has been edited by MRZ28HO (edited January 11, 2001).]
Thread Starter
Junior Member
Joined: Jul 1999
Posts: 8
Likes: 0
From: Tempe, AZ
Why do you say that MRZ28HO?
It is my understanding that stroking an engine puts more stress on it. Something to do with the angle of something-or-other on the crankshaft. Is that correct?
It is my understanding that stroking an engine puts more stress on it. Something to do with the angle of something-or-other on the crankshaft. Is that correct?
Guest
Posts: n/a
"Forget the 10 20 and 50 overbores. It's not done."
Not true. I was going to go .020 over on an engine I built, only reason I didnt was I didnt want to wait 2 months for KB to make the pistons (they produce sizes in cycles, like January-February is one size, March-April is another). .010 was a thought, but it wasnt enough to clean up the bores on my block. Only one I would leave out is .050, I cant think of any time I have seen that cept race stuff.
As for what GPL said, overboring should only be done as necessary, because there is only so much you can overbore and so many times you can do it before you throw the block away. And 10CI isnt really going to make a significant bit of difference anyway.
Not true. I was going to go .020 over on an engine I built, only reason I didnt was I didnt want to wait 2 months for KB to make the pistons (they produce sizes in cycles, like January-February is one size, March-April is another). .010 was a thought, but it wasnt enough to clean up the bores on my block. Only one I would leave out is .050, I cant think of any time I have seen that cept race stuff.
As for what GPL said, overboring should only be done as necessary, because there is only so much you can overbore and so many times you can do it before you throw the block away. And 10CI isnt really going to make a significant bit of difference anyway.
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