FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#41
|
|||
|
|||
The pan rail drop is 1/8" maximum. It was to allow for the slight interference fit between the block and main caps like a Chevy. That little step makes a slightly longer oil pump drive shaft necessary and possibly some very minor modifications to the oil pan/timing cover interface. If using the BOP one piece oil pan gasket, you might want to talk to them about fitment. In our case, I seal the timing cover with RTV, so no issue at all. The IA II block should fit a stock chassis same as a stock block.
|
#42
|
||||
|
||||
In their assembly instructions they mention the oil pan situation. They said you can double up that front oil pan gasket.
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#43
|
||||
|
||||
Also...I've read here, and can't find info anywhere else...The newest IAII iron blocks weigh less than the first several years production of blocks??? Supposedly close to a factory block???
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... |
#44
|
|||
|
|||
My first IA2 was a early block, number 17 if correct. It had a 4.310 bore and weighed about 251 pounds. My 1970 factory 400 block it replaced weighed 207 pounds, this with the block filled to the freeze plugs, SD Performance lifter bore bracing installed and all five main caps were steel Program Engineering with a ARP stud kit.
I believe Bod stated here on PY the average IA2 was about 245 pounds but I presume that was a later design block. I'm going to edit this.... looking at my notes there is a SLIGHT chance the IA2 weight I mentioned above didn't include the main caps, but not sure. They probably weigh at least 25 lbs. I hope Bob or someone else will chime in with their observations to help out. . .
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE Last edited by Steve C.; 02-05-2020 at 07:35 PM. |
#45
|
||||
|
||||
The IAII iron blocks with caps are right around 250#.
__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
#46
|
|||
|
|||
I weighed our IA II years ago with caps on and a 4.375" bore at 247 lbs. So you are right on if you weighed it as delivered. IMO.
|
#47
|
||||
|
||||
I have a IA-2 Iron Block (9.5 deck height and it weighs less than 250 lbs, LOL).
I have also had 3 other IA-2 iron blocks over the years and using a simple bathroom scale they all were around 250 lbs, give or take a couple of pounds, all of my blocks were at a 4.310" bore size. As Bob and Frank made changes to the block, like making the front block bulkhead thicker, the weight went up somewhat. I like moving the aluminum block around a lot better vs the iron block, even with its 9.5" deck height. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
Reply |
Thread Tools | |
Display Modes | |
|
|