Re: Anybody pushing a stock 340 block hard?
[Re: cudaman1969]
#2171405
10/10/16 12:13 PM
10/10/16 12:13 PM
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Joined: Jan 2004
Posts: 8,637 fredericksburg,va
cudaman1969
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fredericksburg,va
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What's a safe rpm for stock crank, stock pan as in a stocker engine. I will use the limited collapsing lifters and stocker cam. Guy I bought the heads, intake and cam from said on kill he went 8500. I don't want to be knocking the bearings out, comments? I seriously doubt any SB LA Mopar out there will pull in gear with a hydrauic roller cam and hydraulidc roller lifter and matching valve springs up to or much past 7000 RPM, let alone 8500 in any gear Maybe in nuetral or park I was told by a older guy, drinking Cutty Sark whiskey straight out of a quart bottle at 1:00 PM in the afternoon at the Colorado river back in 1965, that his N/A 392 Hemi motor in his 21 ft. flat bottom V drive Mandella wood hull would peg his 8500 RPM tach I bet him it wouldn't do that so he offer me a ride in it the next morning when he was sober. It would peg the electric tach at 8500 RPM as soon as he went WOT, but it was showing 4300 RPM crusing at around 35 MPH warming up the motor before he hit it hard He had a Vertex magneto on that motor and he should have had a 4 cyl electric tach for it, not a V8 tach. It was reading twice as much RPM when the motor was running, not the true cranksaft RPM it should have been reading. Most of the other, better, high end boats back then had Jones Motorola mechanical tachs driven off of the top of the V drives so they measured the true crankshaft revolutions, not the propeller revolutions. My message is it is easy to be mislead on many things, especaiily automotive racing parts and storys On your deal I would shift it when the motor quits pulling hard in second gear, don't look at the tach before shifting, listen and feel the motor quit pulling first and then look at the tach to see where it quit pulling hard Shift it 200 to 300 RPM before it quits pulling hard Don't over revved it I'll ask him again next time we talk, might have heard him wrong, he was world champion with a Duster out of Balt. about 10 years back. Funny you mention it, I've never watched a tach, except to launch. Just checked the rpm calculator and it had to be 7500 (I am hard of hearing) or even 6500. I feel better knowing I don't have to turn it that high, never ran a small block before. Will be a learning experience for sure.
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Re: Anybody pushing a stock 340 block hard?
[Re: Dustedu]
#2173097
10/12/16 07:34 PM
10/12/16 07:34 PM
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Joined: Jan 2009
Posts: 171 Columbus, OH
redruM
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Columbus, OH
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don't post much anymore, but
Not many guys are pushing the stock block. Too many say it won't take anything past 600hp. That may be the case but we ran stock block over 10 years and several of those years we leaned on the nitrous pretty hard pushing car 138-40 in 1/8th. We are retiring it now and building a r3 with w9rp's for the duster. I will however be putting a new set of Pistons in it and have it fresh just in case the new build has any problems. thats getting after it
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Re: Anybody pushing a stock 340 block hard?
[Re: Dustedu]
#2177797
10/18/16 04:49 PM
10/18/16 04:49 PM
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Joined: Apr 2009
Posts: 3,433 Toronto
mshred
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Posts: 3,433
Toronto
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don't post much anymore, but
Not many guys are pushing the stock block. Too many say it won't take anything past 600hp. That may be the case but we ran stock block over 10 years and several of those years we leaned on the nitrous pretty hard pushing car 138-40 in 1/8th. We are retiring it now and building a r3 with w9rp's for the duster. I will however be putting a new set of Pistons in it and have it fresh just in case the new build has any problems. What heads and compression with that mph? My half filled, non studded, 360 base 4" stroke motor with 360-2 CNCS is currently running a .63 jet through a cheater on pump gas. Would loveeee to build an r3 for it or one of the G3 hemi's I have sitting on the garage floor, but im tight on cash and want to throw a much bigger hit at the stock block...Hoping it will hold, but I need to build a 727 or glide first and get a proper converter, my 904 has a vert that is total crap
Last edited by mshred; 10/18/16 04:49 PM.
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Re: Anybody pushing a stock 340 block hard?
[Re: mshred]
#2178050
10/18/16 08:33 PM
10/18/16 08:33 PM
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Joined: Sep 2012
Posts: 1,563 Janesville, WI
SpareParts
pro stock
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pro stock
Joined: Sep 2012
Posts: 1,563
Janesville, WI
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don't post much anymore, but
Not many guys are pushing the stock block. Too many say it won't take anything past 600hp. That may be the case but we ran stock block over 10 years and several of those years we leaned on the nitrous pretty hard pushing car 138-40 in 1/8th. We are retiring it now and building a r3 with w9rp's for the duster. I will however be putting a new set of Pistons in it and have it fresh just in case the new build has any problems. What heads and compression with that mph? My half filled, non studded, 360 base 4" stroke motor with 360-2 CNCS is currently running a .63 jet through a cheater on pump gas. Would loveeee to build an r3 for it or one of the G3 hemi's I have sitting on the garage floor, but im tight on cash and want to throw a much bigger hit at the stock block...Hoping it will hold, but I need to build a 727 or glide first and get a proper converter, my 904 has a vert that is total crap YOU'RE BACK!!! You just missed my SBM vs LSX thread
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Re: Anybody pushing a stock 340 block hard?
[Re: SpareParts]
#2179230
10/20/16 04:28 PM
10/20/16 04:28 PM
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Joined: Dec 2004
Posts: 10,607 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
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Posts: 10,607
Rittman Ohio
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Just curious reading this thread what did Glidden use back in the day for a block with his Arrow? Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Anybody pushing a stock 340 block hard?
[Re: redruM]
#2179243
10/20/16 05:06 PM
10/20/16 05:06 PM
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Joined: Jun 2014
Posts: 5,183
Porter67
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This...Nothing Like A Stock Block.
Last edited by EV2Bird; 10/20/16 06:16 PM.
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Re: Anybody pushing a stock 340 block hard?
[Re: one bad fish]
#2186302
10/30/16 11:31 PM
10/30/16 11:31 PM
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Joined: Apr 2009
Posts: 3,433 Toronto
mshred
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master
Joined: Apr 2009
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Toronto
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Well all I can say is my car is heavy all steal all glass stock suspension small tire stock block and it's a bad Mother and no Trans brake I claim to have the baddest stock around 😏 But I also have one of the baddest engine builders around. Extreme race engines out of NY Just curious what year your block is? I always hear mixed things about which blocks are stronger between earlier and later year blocks
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Re: Anybody pushing a stock 340 block hard?
[Re: mshred]
#2186453
10/31/16 03:55 AM
10/31/16 03:55 AM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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Well all I can say is my car is heavy all steal all glass stock suspension small tire stock block and it's a bad Mother and no Trans brake I claim to have the baddest stock around 😏 But I also have one of the baddest engine builders around. Extreme race engines out of NY Just curious what year your block is? I always hear mixed things about which blocks are stronger between earlier and later year blocks . 1970 block
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Re: Anybody pushing a stock 340 block hard?
[Re: SpareParts]
#2186513
10/31/16 10:15 AM
10/31/16 10:15 AM
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Joined: Jul 2008
Posts: 1,534 bronx n.y
one bad fish
pro stock
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pro stock
Joined: Jul 2008
Posts: 1,534
bronx n.y
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No... my all steel car has a metal hood and everything else lol EXCUSE ME LOL
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Re: Anybody pushing a stock 340 block hard?
[Re: redruM]
#2187357
11/01/16 01:48 PM
11/01/16 01:48 PM
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Joined: Oct 2008
Posts: 370 Suffolk County, New York
1mean340
enthusiast
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enthusiast
Joined: Oct 2008
Posts: 370
Suffolk County, New York
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Just wondering, what improvements have you guys ACTUALLY seen from half fill, meaning you guys pushing big power, have you seen 340 blocks before and after half fills with noticeably less block distortion?
The reason why I ask is because my engine is almost finished and my machinist was trying to talk me out of the hardback the other day. I know that he knows his stuff, but he is a huge Windsor guy with a whole bunch of NHRA records but not really a hard core mopar guy. He was telling me that with the meat on the 69 340 block I have, he thought I'd be OK at the power levels I was looking to hit (650- 700fwhp max with the procharger) without using the block fill. He didn't think it would be helping to much with bore distortion and he said that with the .030 overbore the block was still pretty strong. I told him I still wanted to go ahead with it just for the peace of mind if nothing else.
I know guys here have seen the before and after effects of filling the block though, do you guys think on a stronger LA block like a 60's 340 that it would be helpful to do for a big power/lower RPM boosted setup?
Currently I have main studs, hughes girdle, factory main caps, Eagle H beam rods and a factory forged crank.
Last edited by 1mean340; 11/01/16 01:50 PM.
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