Re: small block question
[Re: dustergirl340]
#921008
02/04/11 03:04 PM
02/04/11 03:04 PM
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Joined: Aug 2007
Posts: 1,564 St. Clair Shores, Michigan
bigsbigelow
pro stock
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pro stock
Joined: Aug 2007
Posts: 1,564
St. Clair Shores, Michigan
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Weak points: Minimal head bolts and webbing (T/A blocks had thicker webbing).
Horse power limit: You will get thousands of different answers to that question.
There has been a lot of discussion on this and not one opinion seems to match another.
Last edited by bigsbigelow; 02/04/11 03:05 PM.
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Re: small block question
[Re: bigsbigelow]
#921011
02/04/11 03:14 PM
02/04/11 03:14 PM
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Joined: Sep 2004
Posts: 22,873 Chicken coop
dustergirl340
OP
Chicken Little
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OP
Chicken Little
Joined: Sep 2004
Posts: 22,873
Chicken coop
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Quote:
There has been a lot of discussion on this and not one opinion seems to match another.
Yeah, I know, but it's interesting to read different opinions and the search feature on this site isn't the best.
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Re: 340 small block question....
[Re: dustergirl340]
#921014
02/04/11 07:07 PM
02/04/11 07:07 PM
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Joined: Jun 2010
Posts: 3,112 LONG ISLAND
fishy340
master
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master
Joined: Jun 2010
Posts: 3,112
LONG ISLAND
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Quote:
What is the weak point on a factory 340 block? What is the most power you could push with one?
good friend of mine goes mid 9's 3000+car stock block! point blank it"ll handle more than a stock 440 block
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Re: small block question
[Re: Hot 340]
#921015
02/04/11 07:55 PM
02/04/11 07:55 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
The weak point is the cylinder walls.
This might be the weak point... I have cracked a few walls in my assortment of 340 blocks... I've never run a girdle... I've only blown one head gasket but the most compression I've run on a stock block was 12.4 but I do believe in buzzing them... normal for me is 8200 on my 395ci W-2 but have been a fair bit higher
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Re: small block question
[Re: dustergirl340]
#921019
02/04/11 09:17 PM
02/04/11 09:17 PM
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Joined: Nov 2009
Posts: 3,410 Belpre,Ohio
CHAPPER
master
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master
Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
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Quote:
Quote:
There has been a lot of discussion on this and not one opinion seems to match another.
Yeah, I know, but it's interesting to read different opinions and the search feature on this site isn't the best.
I will have to say,,THIS is with out a doubt, the most accurate desription of this site I have seen!!!
If you like drag racing, support your local track.
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Re: small block question
[Re: ScottSmith_Harms]
#921020
02/04/11 09:21 PM
02/04/11 09:21 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
As mentioned, being a thin wall casting (all production line 340's) makes the cylinder walls potentially thin even when they have standard bores. Core shift (common) can compound the problem. I have also noticed that the lifter valley areas can crack when stressed (big power/overheated/freeze cracks). If you find an example that passes a mag check for cracks and is finish bored and sonic checks good to around 200 thick on all the thrust sides of the cyliners (most fall at 150-180, 200 is a primo example) you can likely run the power up to around 550 without worry. It may live at higher power levels but it's a total crap shoot after that, block filler will likely help a lot but pretty much makes it a race only piece at that point. If your target is over 500HP my advice would be to invest in a new R3 or Resto 340 block to build if you can afford one ($2,500.00 or so) so you start with a strong foundation, these thicker/stronger blocks can hold up to well over 1,000hp.
My self I wouldnt worry about a stock block till I was over 600 hp but I would want a good balance... I dont mind putting a sleeve or two into a good 340 block.... I've got 4 good ones now... my 416 going into my Rampage for my drag week car will be in the area of 550 hp and I dont foresee any issue ... I also try to keep the bore size down to a .030 or .040 over bore
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Re: small block question
[Re: Hot 340]
#921021
02/04/11 09:28 PM
02/04/11 09:28 PM
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Joined: Apr 2003
Posts: 3,527 Tulsa, Oklahoma
340Cuda
master
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master
Joined: Apr 2003
Posts: 3,527
Tulsa, Oklahoma
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Quote:
The weak point is the cylinder walls.
We have even busted cylinders on blocks that were half filled with HardBlok.
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