wanted 2.5 tall deck block

[zin]

Interesting... I'm entertaining thoughts of building a longer rod 2.2, but I'll have to look further to see if the benefits are worth the added expense, and what drawbacks there would be (like a weaker block, etc).

Thanks for the info guys!

Mike

[moparzrule]

Hmm, anybody know what crank snout size the tall block has? Is it the same as common or non-common blocks?

Would be super interesting to see a tall block 2.2, with super long rods and and you could make some super strong pistons. The further the pin is away from the top of the piston the stronger the piston will be. This is why 2.5 pistons are weaker than 2.2's. Wow that would be a potent setup, but since it's a non-common block how strong is the main webbing in the tall block?
Interesting thoughts.

[zin]

Hmm, anybody know what crank snout size the tall block has? Is it the same as common or non-common blocks?

Would be super interesting to see a tall block 2.2, with super long rods and and you could make some super strong pistons. The further the pin is away from the top of the piston the stronger the piston will be. This is why 2.5 pistons are weaker than 2.2's. Wow that would be a potent setup, but since it's a non-common block how strong is the main webbing in the tall block?
Interesting thoughts.

Now you're thinking what I've been thinking! But if the block won't deal, it's all for naught.

Mike

[cordes]

Now you're thinking what I've been thinking! But if the block won't deal, it's all for naught.

Mike

Since this has turned into a bit of a technical discussion I will chime in again. In a couple of recent tall deck threads, the tall deck block (the 88s anyway) has been touted just as strong if not stronger than the common blocks. I am really thinking about picking one up from a yard for cheap sometime for a crazy hybrid build down the road.

[moparfwdsleeper]

I am really thinking about picking one up from a yard for cheap sometime for a crazy hybrid build down the road.

I had this thought also.

[moparzrule]

Since this has turned into a bit of a technical discussion I will chime in again. In a couple of recent tall deck threads, the tall deck block (the 88s anyway) has been touted just as strong if not stronger than the common blocks. I am really thinking about picking one up from a yard for cheap sometime for a crazy hybrid build down the road.

So there *may* be a difference between 86-87 and the 88 blocks?
Thanks for the info though, very intriguing Do you happen to know whether the tall block takes the snout size of a common block crank or non common block?

[ShelGame]

The tall deck crank is unique. At least, the one I have is. It's heavier than the CB 2.5 Turbo crank by about 4 lbs, and it uses the non-CB snout (square tooth pulley). But, it also uses the CB seal housings. So, any CB crank will drop right in with no issues at all. Just use the round tooth pullies/belt.

I have both an 87 and an 88. I don't see any difference between them at all. Same casting number and everything.

[moparzrule]

I would guess the TB crank would have larger counter weights because the rods being longer are heavier than normal.

Are you saying your tall block has a square tooth pulley? Or you are just saying that the TB uses the same size as the square tooth? Cuz I was under the impression that all tall blocks used the round tooth pulley.

[cordes]

I would guess the TB crank would have larger counter weights because the rods being longer are heavier than normal.

Are you saying your tall block has a square tooth pulley? Or you are just saying that the TB uses the same size as the square tooth? Cuz I was under the impression that all tall blocks used the round tooth pulley.

I thought that just the 88s were round tooth? This tall deck business is very confusing.

[bgbmxer]

have one in pa but not sure if im willing to sell it at this point whats it worth to you

[moparzrule]

I thought that just the 88s were round tooth? This tall deck business is very confusing.

Sounds like you know more than I do about the tall block at this point. Can anybody confirm this?

["Top Fuel" Bender]

for those interested
when I built my race engine I was going to use the 2.5 tall deck rods for my 2.2
giving it the elusive 1.72 rod ratio
better rod angle
less engine wear due to less pressure on the trust side of the piston
longer dwell time for more cylinder filling
slower piston speed
ect..... which is all theory for you to decide
anyway
the rods were really whimpy looking so
I had Pauter Machine make chromoly rods for the 2.2 crank, 2.5 tall deck length
and I believe small block ford wristpins which Wiseco suggested when making the pistons
smaller pin but thicker if I remember correctly (been in there for 10+ years)
which kept the wristpins out of the oil control ring land also
So if anybody needs some really beefy rods
I have the specs here for Pauter and Wiseco

[ShelGame]

I would guess the TB crank would have larger counter weights because the rods being longer are heavier than normal.

Are you saying your tall block has a square tooth pulley? Or you are just saying that the TB uses the same size as the square tooth? Cuz I was under the impression that all tall blocks used the round tooth pulley.

Both of mine are square tooth...

[turboking]

still looking

[bgbmxer]

have one outside of york pa 17360 let me know if your interested whats the common blocks condition

[turboking]

sold the common block . there gotta be a 2.5 tall deck somewere in the tri state!!!!!!!


Carl
1-516-643-2284 cell

[rosie]

On that note, what about the 4 cyl dakotas? I thought they had the tall block? If they do, anybody want one on the left coast? Shipping and couple bucks to pull it and market (ecology) price.
Rosie
San Diego

[moparzrule]

No it's not a tall block in the dakota. In 88-older dakota's they only had a 2.2L, carb'd. In 89' they went to the 2.5L commonblock TBI engine.

[capev86]

if you did that, the compression would be in the basement!

the 2.5 tall deck had regular 2.2 pistons. the deck was 12mm taller so that the pistons wouldn't pop out the top with the longer throw of the 2.5 crank! on the cb 2.5, they used pistons that put the pin up higher to account for the extra stroke length.

[turboking]

Ttt Any One In The Tri State Area