Rebuilding short block finally

[65-coupe]

I have started to rebuild my short block. I have a 68 block at the machine shop right now. It will be zero decked, bored .40 over and journals polished. I ordered .40 cast pistons and a 274/274 110 cam to replace my 264/264 110 that I have now. I will post pics as I move forward. To get the 10.5 C/R I will have to mill the Alum head down also. Hopefully I can get Mustang Monthly to do another story on the build.

 

[cr_bobcat]

Sweet I'll be tuning in. I've been contemplating some block work too.

Out of curiosity, why 0.40 over? Were the cylinders scored? I'm just wondering if there was some performance gain beyond 0.20 over that would make the loss of cylinder material a good tradeoff.

 

[65-coupe]

Sweet I'll be tuning in. I've been contemplating some block work too.

Out of curiosity, why 0.40 over? Were the cylinders scored? I'm just wondering if there was some performance gain beyond 0.20 over that would make the loss of cylinder material a good tradeoff.

A couple of the cylinders needed it to clean/straighted them up. I wanted .30 but no big deal.

 

[drag-200stang]

Are your cast pistons ,performance pistons with oil ring drain holes or stock large slot. That cam in a stick shift car could be shifed over 6000. I have used performance cast pistons to 6500 and forged to7500 with good luck.

 

[xctasy]

I'd save up on some forged RaceTeck 1.3" deck pistons and nominal 5" 1970-1974 Pinto2.0 /Capri 2.0 conrods (4.96" really if I recal). You'd then have the best pistons with the best conrods.

The stock aftermarket US I6 cast alloy piston situation isn't too flash, with Does10'S, Parkwood60, and any number of early 2V and Tempo piston swappers here often finding the factory cast replacments decimate themselves in short order.

At your doorstep is the best forged piston mackers in the world, angling for your business.

I wouldn't want to build my 200 twice....

 

[65-coupe]

I'd save up on some forged RaceTeck 1.3" deck pistons and nominal 5" 1970-1974 Pinto2.0 /Capri 2.0 conrods (4.96" really if I recal). You'd then have the best pistons with the best conrods.

The stock aftermarket US I6 cast alloy piston situation isn't too flash, with Does10'S, Parkwood60, and any number of early 2V and Tempo piston swappers here often finding the factory cast replacments decimate themselves in short order.

At your doorstep is the best forged piston mackers in the world, angling for your business.

I wouldn't want to build my 200 twice....

The Pistons that CI carries now are the Keith Black pistons. Everything is already ordered and just arrived today. I am sure for my build the KB pistons and stock rods will be just fine. If I was going to run boost then I would have went with forged pistons. Thanks for the info I do appreciate it.

 

[rbohm]

KBs are excellent pistons, even in cast form.

 

[65-coupe]

Well the block is back from the machine show. Bored .040 over to straighten out one of the bores and 0 decked. I will try to take a couple of pics. I will start the to assemble it in the middle of Jan. I will be using parts off my current engine so I will need to pull it. Looks like Mustang Monthly will be doing another article on this build also.

 

[xctasy]

KB Performance Pistons, reachable at 800-648-7970

Note: NOT "Keith Black" pistons, but "KB" pistons http://www.kb-silvolite.com

Its not associated with http://www.keithblack.com/contact.html




The US Silvolite catalogue lists the Hyper Eutectic Australia 3.3 and 4.1 pistons. The stock replacement 200/250 US or 2.3/2.5 HSC pistons are not Hypereutectic, despite what some may say. .

See page 29 and 33 of the catalogue.
http://www.uempistons.com/catalogs/silv ... atalog.pdf

3327H and 3328H flat top pistons were added in 2011.
AUS. FORD
L6
200/250
3.3/4.1

They say "Not Intended for Racing Applications" so people will buy non hypereutectic HSC and stock 200/250 US replacement pistons instead, based on, in the case of the stock replacement I6 US psitons, a flawed, low performance design last updated in 1969. .

The 3327H and 3328H are the pistons to buy, US made Australian spec pistons, not HSC or otherwise. No Americans get harmed with job loss or loss of margin if you get these pistons.

You are the customer, for goodness sake make sure you get quality.better than stock pistons. Ask the supplier if they are stock replalcment 200 pistons with slots.

If the part numbers are without an H, they are stock, and you've not got the best cast pistons at all. Do check. If you are then still totally happy, then proceed

 

[65-coupe]

Keith Black/KB pistons are the same according to Summit Racing. http://www.summitracing.com/search/bran ... kb-pistons

For the inline 6 http://www.summitracing.com/parts/uem-s ... /make/ford

http://www.summitracing.com/parts/uem-s ... /overview/ this is the ones I got.

Also Mike said he is getting Keith Black pistons when I ordered my parts.

KB Performance Pistons, reachable at 800-648-7970

Note: NOT "Keith Black" pistons, but "KB" pistons http://www.kb-silvolite.com

Its not associated with http://www.keithblack.com/contact.html




The US Silvolite catalogue lists the Hyper Eutectic Australia 3.3 and 4.1 pistons. The stock replacement 200/250 US or 2.3/2.5 HSC pistons are not Hypereutectic, despite what some may say. .

See page 29 and 33 of the catalogue.
http://www.uempistons.com/catalogs/silv ... atalog.pdf

3327H and 3328H flat top pistons were added in 2011.


AUS. FORD
L6
200/250
3.3/4.1

They say "Not Intended for Racing Applications" so people will buy non hypereutectic HSC and stock 200/250 US replacement pistons instead, based on, in the case of the stock replacement I6 US psitons, a flawed, low performance design last updated in 1969. .

The 3327H and 3328H are the pistons to buy, US made Australian spec pistons, not HSC or otherwise. No Americans get harmed with job loss or loss of margin if you get these pistons.

You are the customer, for goodness sake make sure you get quality.better than stock pistons. Ask the supplier if they are stock replalcment 200 pistons with slots.

If the part numbers are without an H, they are stock, and you've not got the best cast pistons at all. Do check. If you are then still totally happy, then proceed

 

[xctasy]

The pistons you have are standard replacements for the 2300 OHV four cylinder engine. KB became associated with Silvolite, they aren't KB pistons, they were born as Silvolite pistons from years ago.


Silv O Lite Pistons 1185 020 4 Ford 1983 94 2 3L

Vin Code M, S or X, with 90 thou offset gudgeon pin.

Stock HSC Ford 4 cylinder pistons which have a known failure on four forum members cars here.

One was, I think, Mustangaroos son. Parkwood60, Does 10s, and there was another.

There were photos of cracked piston skirts, which I am afraid is common. I'm trying to find them.


Normally, it might be down to coincidence, but not when it happens to four members.

In Australia, they use cast pistons in L6's with superchargers, and don't break them, but that's becasue in the 60's and early 70's, in line six Ford, Holden and Mopar stock piston quality was appalling, with the tops and skirts cracking on stock and stock replacment pistons.

See http://www.enginelabs.com/news/video-wa ... orsepower/

 

[65-coupe]

Thanks for the info. I will let you now how they work out for me. But for my street build I think they should me fine.

The pistons you have are standard replacements for the 2300 OHV four cylinder engine. KB became associated with Silvolite, they aren't KB pistons, they were born as Silvolite pistons from years ago.


Silv O Lite Pistons 1185 020 4 Ford 1983 94 2 3L

Vin Code M, S or X, with 90 thou offset gudgeon pin.

Stock HSC Ford 4 cylinder pistons which have a known failure on four forum members cars here.

One was, I think, Mustangaroos son. Parkwood60, Does 10s, and there was another.

There were photos of cracked piston skirts, which I am afraid is common. I'm trying to find them.


Normally, it might be down to coincidence, but not when it happens to four members.

 

[xctasy]

Thanks for the info. I will let you now how they work out for me. But for my street build I think they should me fine.

That's what I thought too, but evidence makes it a light grade piston with risks attached to it. I weighed in on the discussion, said the same things as I have today.

In practice, its probably as good a quality as what was there in New Old Stock form. They are what they proport to be, and you've purchased from a good supplier.

Back in Wed Nov 13, 2002 Mustangaroo was planning his second modified Mustang with his son, https://www.fordsix.com/forum/viewtopic ... p=316#p316

My son is about to rebuild his 65 Mustang also a 200 cid, hes doing the same things except installing a 256 Isky cam, and plans to run 10.0:1 CR, and either a Holly 5200 or a Holly 500 cfm 2V that I have tucked away for a rainy day in the garage! I will dyno his engine after it's rebuilt and see how much more HP the cam adds!

I can't quite quickly find it, but his son Jasons HSC pistons cracked in a street 2V 200 engine installation.'

User 65Stang or Little Roo

From Sun Feb 20, 2005

See https://www.fordsix.com/forum/viewtopic.php?f=1&t=22211

I have pictures on a disk somewhere, the links to it are long gone unless someone else can help.


The HSC pistons are designed for 1.7:1 rod ratio engines, and they follow old pre 1970 I6 piston design with a liitle extra wrist pin offset. They are still slotted. Germans went to drilled oil holes for durability reasons in 1962 with their V4 and V6's. Even in the comparitively rough V4's like Saab 96's with the 1.7 liter engine, they could go to over 7000 rpm without breaking. https://www.youtube.com/watch?v=kL7UEzuIS00

When the Aussies started following German Mahale practice of drilled in oil holes and not slots in 1973, it then became easy to get great piston integrity from cast alloy pistons. Before the piston upgrade, Holden L6's would lose p iston tops and crack skirts on a regular basis..if the conrod bolts didn't break first...

Here's some 8000 rpm capable Cologne V6 pistons with drilled holes dating from a 78 Taunus. These pistons were what Ford used in the 188 hp Capri Turbo 2.8. Cast alloy pistons. Some have repudely put 22 psi of turbo boost through them without failure

http://www.turbosport.co.uk/showthread.php?t=344987



And here (in varnish, after characteristic blow by typical of high voids pistons) is the low rent slotted Ford 40 thou over replacement 200 piston.



Drilled Mahale 2.8 171 cube verses Slotted FoMoCo 3.3 200 cube

 

[xctasy]

At ease.


Here's what they were able to do in Australia with a stock US style piston on the 170 and 200 cubic inch engines in the mid sixties


Part 1
https://www.youtube.com/watch?v=juTj5gS3xUI
Part 2
https://www.youtube.com/watch?v=BiIVVHv59Xc


I'd guess you'll have no problems if they didn't fail back in those days.

 

[woodbutcher]

Hi X.Thanks for the vids.Happy New Year to you and yours.
Good luck.Have fun.Be safe.
Leo