Re: 360 Block Question
[Re: RapidRobert]
#2087454
06/07/16 12:00 AM
06/07/16 12:00 AM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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I believe the "late" block began with 74. The casting numbers are different. Regardless, I wouldn't trust QC from the 70's and would have everything sonic checked for core shift, etc., before going crazy with one. Agreed & I think the first number went from a (3) to a (4). mine was cast 10/10/73.. 496 block. What do you mean 3 to a 4?
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: 360 Block Question
[Re: clonestocker]
#2087485
06/07/16 12:52 AM
06/07/16 12:52 AM
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Joined: Nov 2006
Posts: 733 jacksonville,FLORIDA
slammedR/T
super stock
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super stock
Joined: Nov 2006
Posts: 733
jacksonville,FLORIDA
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Truck is almost done, I will see how much and how long a stock magnum block can last
2000 Dakota R/T, 408 magnum, 727, Indy heads 1000cfm 4150 carb, 93 octane fuel. motor; 10.258 @ 132.78 200 shot; 9.262 @ 144.69 racemagnum
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Re: 360 Block Question
[Re: DARTH V8Я]
#2087495
06/07/16 01:06 AM
06/07/16 01:06 AM
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Joined: May 2008
Posts: 1,131 Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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According to race bulletin #8, July 1982:
"The early 360 ('71-'76) blocks are a special case. They use a 4.00" bore (340 was 4.04") but the block was made with the 340 water-jacket core. This means that these blocks can be bored to the same actual bore size as any 340 and have the same borewall thickness. This is NOT true of the newer 360's" The thing is, that's only 20-thousandths on the radius even if it is true. That's just not really significant if you start measuring and see how much the numbers vary place to place. I can't see how they'd even bother to have a different set of water jacket cores for such a small difference.
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Re: 360 Block Question
[Re: dogdays]
#2087505
06/07/16 01:22 AM
06/07/16 01:22 AM
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Joined: May 2008
Posts: 1,131 Thigh-Gap Junction
@#$%&*!
New user name, Same old jerk!
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New user name, Same old jerk!
Joined: May 2008
Posts: 1,131
Thigh-Gap Junction
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... Actually 0.200" is what's considered minimum for a major thrust in the rest of the old stuff. For Mopar engines if you can get 0.170" on a major thrust it's going to work. And the non-thrust parts of the block can go all the way to 0.120" and some won't even make that, and I mean virgin blocks! If you have 0.170" or more on all thrusts you go out and buy lottery tickets!
I have a 360 block that's .250" minimum on all thrusts at standard bore but my lottery tickets aren't so good. It's from '82, or '84 I believe. I also have a 440 block with similar numbers from '76 or '77 I think.
As for the thousands of 600hp 360s out there, I think they're all out racing those fabled 383 Hemis that Gramps had in his Road Runner. Put another way I don't believe it. If there are 100 360s making 600hp I'd be surprised.
A friend had one last year until an H-beam snapped in half. Block was probably still usable, heads were fine, crank was repairable, camshaft even survived! [/quote]
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Re: 360 Block Question
[Re: Wedgeman]
#2087696
06/07/16 12:59 PM
06/07/16 12:59 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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This is the block I have been racing the last few years. 1979 E58 motor originally. Sonic checked around .2 on the average. Lifter bore pic shows the holes located in the middle of the bosses. Block is about a 1/2 fill and 4 blt Milodon caps. Blower motor making about 650 HP. No problems so far. 4" stroke and .040" over.
Last edited by Crizila; 06/07/16 01:01 PM.
Fastest 300
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Re: 360 Block Question
[Re: DARTH V8Я]
#2087788
06/07/16 03:54 PM
06/07/16 03:54 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I believe the "late" block began with 74. The casting numbers are different. Regardless, I wouldn't trust QC from the 70's and would have everything sonic checked for core shift, etc., before going crazy with one. Agreed & I think the first number went from a (3) to a (4). mine was cast 10/10/73.. 496 block. What do you mean 3 to a 4? Ma changed the first number from a 3 to a 4 to denote the (so called) thin wall change which we now know from Andys work was hit or miss or something not the same across the board but there definitely was a change somewhere that was denoted by the first number changeing
live every 24 hour block of time like it's your last day on earth
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Re: 360 Block Question
[Re: dogdays]
#2088477
06/08/16 05:46 PM
06/08/16 05:46 PM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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Well my count is up to three 600+ hp 360s.
And? Point being it can be done and those blocks live no problem. Dude came down to sonic my 496 block. 24pts every cylinder all .2+. $100 well spent.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: 360 Block Question
[Re: dogdays]
#2088496
06/08/16 06:25 PM
06/08/16 06:25 PM
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Joined: Feb 2005
Posts: 20,201 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,201
PA.
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Well my count is up to three 600+ hp 360s.
Blazin' Bob, any new casting gets a new casting number. Even if it is a little tiny change. Or maybe the mold cores are starting to flake.
The only time a significant casting change was made without a casting number change was the last half of the run of 451 heads for bigblocks. Engineering corrected some thin areas to make them safer to port but because the bigblocks were already planned to be out of production they didn't dare give it a new casting number. So they instead put the number "1" on the end of the head.
Casting numbers increase with time as more and more castings are designed. So for example a casting number with a 1 in front is probably from the '50s, 2 would be '60s, 3 would be late '60s, etc. I think the casting numbers are in the 5s nowadays.
In the early '80s you could buy a bare 452 casting for something like $59.00.
R. I'm not going to say that there aren't 600 HP stock 360 blocks out there running but how about posting up your average ET's at the track, weight, and track and corrected altitude. Let us do some number crunching.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: 360 Block Question
[Re: DARTH V8Я]
#2088504
06/08/16 06:34 PM
06/08/16 06:34 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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Well my count is up to three 600+ hp 360s.
And? Point being it can be done and those blocks live no problem. Dude came down to sonic my 496 block. 24pts every cylinder all .2+. $100 well spent. I use to have a guy doing my sonic checking that did 64 reading per cyl... charged $75 at that time.. he was well worth it... he was a old hard core guy that did a lot of machine work also... very nice guy and his prices on everything was on the cheap side compared to most shops... I watched him do my mega block so I knew he wasnt BSing on the numbers... guys that get a small hand full of readings have no idea what the block is really like... a 1/2" away it could be paper thin.. plus if he found a area that was iffy he would do a dozen readings just in that area... no charge
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Re: 360 Block Question
[Re: clonestocker]
#2088513
06/08/16 06:58 PM
06/08/16 06:58 PM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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I had a 318 block sonic tested and when it spilt 3 bores I measured the busted parts and none of them were what he told me, not even close so watch it done if possible and listen to what p body said, a chain is only as strong as it's weakest link or in other words a cylinder is only as strong as it's thinnest point.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 360 Block Question
[Re: HotRodDave]
#2088558
06/08/16 08:19 PM
06/08/16 08:19 PM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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I had a 318 block sonic tested and when it spilt 3 bores I measured the busted parts and none of them were what he told me, not even close so watch it done if possible and listen to what p body said, a chain is only as strong as it's weakest link or in other words a cylinder is only as strong as it's thinnest point. I use to have a guy doing my sonic checking that did 64 reading per cyl... charged $75 at that time.. he was well worth it... he was a old hard core guy that did a lot of machine work also... very nice guy and his prices on everything was on the cheap side compared to most shops... I watched him do my mega block so I knew he wasnt BSing on the numbers... guys that get a small hand full of readings have no idea what the block is really like... a 1/2" away it could be paper thin.. plus if he found a area that was iffy he would do a dozen readings just in that area... no charge Well this guy does testing for the 3 major machine shops around here.. so yeah, he's trustworthy. He also did every cylinder.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: 360 Block Question
[Re: dogdays]
#2089417
06/10/16 12:02 AM
06/10/16 12:02 AM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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What's my point?
You said, "Plenty of LA blocks running 600+ and living a long happy life."
I have now counted three. That's not plenty.
My point is it's super easy to SAY you have a 600hp 360. If you had said there are plenty of claimed 600hp 360s, I would have had to agree.
Way back in the days of smallblock Pro Stock the Mopar guys started having trouble with 2-bolt 340s at around 600hp. They reportedly scrapped T/A or AAR cars for the blocks which had provisions for adding four bolt main caps.
Or maybe that's just a myth.
R. Nutter.. http://www.hotrod.com/how-to/engine/1606-small-block-big-punch/
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: 360 Block Question
[Re: clonestocker]
#2089507
06/10/16 04:35 AM
06/10/16 04:35 AM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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Nice article..but did I miss the ET slips?
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: 360 Block Question
[Re: 70AARcuda]
#2089562
06/10/16 11:26 AM
06/10/16 11:26 AM
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Joined: Feb 2005
Posts: 20,201 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,201
PA.
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Nice article..but did I miss the ET slips? BINGO!!!!!!!!!!!!!!!! Kinda reminds me of the kids I used to over-hear talking about their cars at the bar. Its not that hard people to back up the truth. Car weight Corrected altitude or supply barometer reading, temperature, humidity. And the ET ( MPH) you ran in the quarter mile. (60 foot, 1/8, 100 ft) We can take it from there. LOL
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: 360 Block Question
[Re: clonestocker]
#2089637
06/10/16 02:03 PM
06/10/16 02:03 PM
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Joined: Dec 2005
Posts: 11,706 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,706
Fulton County, PA
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I'd like to know how many runs qualify for living a long happy life.
And I'd like to see what the main caps look like out of a 600+ horsepower 360 based engine after maybe 120 runs at 7k+ in the lights.
If the results don't match the theory, change the theory.
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Re: 360 Block Question
[Re: clonestocker]
#2089642
06/10/16 02:17 PM
06/10/16 02:17 PM
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Joined: Nov 2011
Posts: 2,154 Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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120 runs for me would be over 60 years lol
When it takes more than a sweet mullet to prove you rule at the trailer park..
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