maybe on here alrady but wondering max bore on an a460 block?

5pointslow January 25th 2010, 6:47 pm

gave some thought and priced out some stuff ...im basicly wasting my time with a stock block and for 2k to have a a460 its just
the piece i need ......i want 9.00-9.50 in my lx and i think it would be a good start and not have to lose sleep over the block beeing weak?

i want to know max bore or bore cappacity

and about using wet sump , how much power are some of u guys making with a non dry sump setup?

thanks

c.evans January 25th 2010, 7:37 pm

I have yet to find what the max bore is on a FRPP A-460 block. I say that because even on some blown up engines, where you could put your fist through a hole in the cylinder wall, I was amazed at how much wall thickness was still left on engines that were already 4.625" - 4.630", or so. So somewhere bigger than that is my best guess. If you buy a new block from Lem,,,,he'll give you a sonic test sheet on that particular block, so that may help you decide "how big".

As for power with a "non dry sump" engine, I'd say that's up to you. How much do you want to make? As for engines that we've dynoed around here, if I remember correctly, I think one of Kevin's engines was 1071 Hp barefoot and 1371 Hp on spray. That was an FRPP A-96 alum. block however, but both blocks have a dedicated oiling system, so IMO it's up to you and your budget.

Hope this helps,

Charlie

5pointslow January 25th 2010, 9:43 pm

thanks helps alot looking to make 850-950 ish want 9.00-9.50 out of my car ....

but was looking at 4.500 bore and 4.600 bore

was gonna use wet sump not a dry if i could

dfree383 January 26th 2010, 6:47 am

Wet sump will work fine IMO

As far as a460 blocks one I have here the sonic test indicates 4.630+ will work if one wanted too.

DanH January 26th 2010, 8:56 am

dfree383 wrote:Wet sump will work fine IMO

As far as a460 blocks one I have here the sonic test indicates 4.630+ will work if one wanted too.

how much wall was left at that bore ?

dfree383 January 26th 2010, 9:10 am

DanH wrote:
dfree383 wrote:Wet sump will work fine IMO

As far as a460 blocks one I have here the sonic test indicates 4.630+ will work if one wanted too.
how much wall was left at that bore ?

Ford Spec Minimum

lghting94 January 26th 2010, 9:23 am

For us that dont know what is Ford Spec Minimum?

res0rli9 January 26th 2010, 10:40 am

lghting94 wrote:For us that dont know what is Ford Spec Minimum?

ya becouse Iv got one thats 4.650

dfree383 January 26th 2010, 12:25 pm

Lem should have it, I can't recall it off the top of my head, but ford does have a minimum wall thickness spec for them to not be considered blems and provide at least a 4.600 bore. From my understanding some come thru much better than others.

paulie9fingers January 26th 2010, 12:40 pm

c.evans wrote:I have yet to find what the max bore is on a FRPP A-460 block. I say that because even on some blown up engines, where you could put your fist through a hole in the cylinder wall, I was amazed at how much wall thickness was still left on engines that were already 4.625" - 4.630", or so. So somewhere bigger than that is my best guess. If you buy a new block from Lem,,,,he'll give you a sonic test sheet on that particular block, so that may help you decide "how big".

As for power with a "non dry sump" engine, I'd say that's up to you. How much do you want to make? As for engines that we've dynoed around here, if I remember correctly, I think one of Kevin's engines was 1071 Hp barefoot and 1371 Hp on spray. That was an FRPP A-96 alum. block however, but both blocks have a dedicated oiling system, so IMO it's up to you and your budget.

Hope this helps,

Charlie

. . . I didn't get a sonic test sheet Crying or Very sad

, my block was drop shipped direct from Ford Racing in Michigan Wink

richter69 January 26th 2010, 2:25 pm

dfree383 wrote:Lem should have it, I can't recall it off the top of my head, but ford does have a minimum wall thickness spec for them to not be considered blems and provide at least a 4.600 bore. From my understanding some come thru much better than others.

yes they do................. Cool

Lem Evans January 26th 2010, 2:41 pm

The blocks do not come from FRPP with sonic check sheets...they can be requested after the fact .

bruno January 26th 2010, 2:45 pm

Lem Evans wrote:The blocks do not come from FRPP with sonic check sheets...they can be requested after the fact .

Which is an additional service and there is a charge ...... correct Lem

Lem Evans January 26th 2010, 2:55 pm

No charge .

paulie9fingers January 26th 2010, 4:59 pm

I was only kiddin guys that's why I put the little smiley guys on there, makes no difference to me.

138 January 26th 2010, 5:30 pm

my question is ...minimum bore?

would be nice to take a rotating assembly and swap from a factory to a a460... possible..probably not huh?

Lem Evans January 26th 2010, 5:36 pm

They can be done in a standard bore.

138 January 26th 2010, 6:01 pm

Lem Evans wrote:They can be done in a standard bore.

check your pm box I will await your call... Wink

Nevs January 26th 2010, 8:55 pm

Mine came at 4.340"...

bdkfs January 27th 2010, 10:33 pm

I know the a-block would be stronger but if you are only wanting 850 to 900 hp it could be overkill. The a-block is over a hundred pounds heavier than a stock block and a lot more expensive. I know the block is "only 2000." but you still have to bore and hone it so add 300 to 500 plus the last block I received from ford motorsport had to have a sleeve in one of the cylinders because it had a perosity flaw and leaked and they would not exchange the block. I have a stock block that I had machined and installed 4 bolt main caps(300 caps about 450 to machine and line bore)I have a 4.500 crower billet crank and crower billet rods 4.440 bore 557 ci with cj aluminum heads .I have had this combo together for over 10 years now in my 2880 lb door car it has run a best of 8.70s 8.80 in the summer about154 mph I also ran this engine in my dragster weighing 2040 lbs with a 300 shot of nos it runs high 4.50s to low 4.60s all day all year. this engine has over 2000 runs on it and still going strong

Lem Evans January 28th 2010, 1:16 am

An A460 block being "over 100 lbs heavier than a stock block" is incorrect.

bdkfs January 28th 2010, 7:12 am

Do you know what the average weight difference is? I know in my case my a blocks with caps installed weight 319 lbs and 306 lbs machined and my stock blocks are all in the low 220lbs range my c@c aluminum blocks weight 141 lbs and my AR aluminum blocks slightly more. My a blocks are earlier versions not sure if the newer ones are lighter maybe so. Do you think the A block is needed for 850 to 900 hp?

Nevs January 28th 2010, 7:53 am

bdkfs wrote:Do you know what the average weight difference is? I know in my case my a blocks with caps installed weight 319 lbs and 306 lbs machined and my stock blocks are all in the low 220lbs range my c@c aluminum blocks weight 141 lbs and my AR aluminum blocks slightly more. My a blocks are earlier versions not sure if the newer ones are lighter maybe so. Do you think the A block is needed for 850 to 900 hp?

My A460 block was 290# before any machine work. My Dove A block was 225# after being bored to 4.440".

Lem Evans January 28th 2010, 11:21 am

M-6010-A460* 10.322" Deck Height
Cast iron block with 4-bolt main caps on journals 2, 3, and 4
Nodular iron main caps
Can be bored/stroked to produce 598 cu. in.
Siamese cylinder bores
Bore range from 4.360-4.600"
Wet sump oiling design
3.000" main journal diameter
Weighs approximately 290 lbs.
........................................................................
Copied from FRPP site .

Outlaw5.0 January 28th 2010, 9:30 pm

A-460 unmachined is listed at 290 lbs
A-460 fully machined with 4.600 bore should be in the 270 lb range

Eliminator unmachined is 270 lbs I believe.

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