87 2.2 vs 90 2.2 tbi block's..

[lancerman23]

ok guys i got alot of Q's about this.....im getting ready to build i hope a pretty mean machine..but i feel retarded on the block side of things...cant get a reall straight answer, so i need some advice..

i am doing the forged pistons, h-beam rods for internals..

i found a block out of a 1990 dodge shadow tbi, how do you tell if it is a common block? i was told that ever engine from 89 n up is a common block whether it's a turbo or tbi car? is this true? if so what do i need to do to it? machine work wise. and the venolia 2.2/std forged pistons i bought will work in that common block, so what do i need to do, to make sure i dont blow her up on the first hard run? any advice guys would be nice. thanks.

[4Daytonas]

all 2.2 after 88 are CBs.CBs don't have a fuel pump plate on the block(no place for old style fuel pump).Turbo blocks have turbo oil drain-back tube on the back side of the block above the pan rail.Why did you get std(size?) pistons?
See the block interchangeability thread below

[lancerman23]

um didnt see why not on the std size? power wise whether it's on a v8 or 4 cylinder never found any documentation that show's you get 100% better power by going 30 to 40 over on the cylinder's??! it just makes the space between the cylinder walls and the water jakets smaller and in my opinion weaker.. so im just cleaning the block up, just gonna run a hone through it...and be done...why what have you heard?

[Screamin4banger]

Quote:

Originally Posted by lancerman23 um didnt see why not on the std size? power wise whether it's on a v8 or 4 cylinder never found any documentation that show's you get 100% better power by going 30 to 40 over on the cylinder's??! it just makes the space between the cylinder walls and the water jakets smaller and in my opinion weaker.. so im just cleaning the block up, just gonna run a hone through it...and be done...why what have you heard?

I heard you need to check your bores with a bore gauge to determine out-of-round and taper. That will give an idea what you're gonna bore to; and if ya wanna be really slick you measure the 4 pistons you bought (after determining your overbore) so you can final-hone each cylinder to each piston (yeah, new pistons can vary).

Your original post made it sound like you have some pistons in a box and now you're gonna go out and find a motor to stick them into.

[lancerman23]

lol my bad...sorry should have been more clear on what i was doing..

[crusty shadow]

bore size doesnt really matter- you bore and hone to get a perfectly round and straight cylinder, along with the correct finish for your rings and poper pistom wall clearance.
i bought .020 over pistons because of that- not trying to increase bore size, just want a perfect cylinder for my 500.00 forged pistons to ride in. i could have stayed with standard size pistons though as i have decided that im gonna sleeve all 4 cylinders.
since youre spending the jack on good pistons make sure your machine shop will bore match each piston to each bore- more precise your clearances are the better its gonna run and last. definately use a torque plate when honing- our engines like to distort the bore near the top of the cylinders with the head bolted on. good advice for any engine but its really important on ours.

[lancerman23]

Quote:

Originally Posted by phuc-u-td as said bad idea w/std piston coz its hard too good block w std boar thats perfect and round and no taper yep yu are rite on the $$$$$ bore size dont matter? oooo mayb i get what yu are sayn. if the guy dont no much about blocks it wood be a good idea to get a shop that doz so it dont get messed up

i unerstand blocks can flex and get distorded when machining...im talking about bore size doesnt matter when it comes to HORSE POWER! i've never seen in over 10 years of drag racing that a .20, .30 or even .40 over ever creates more power...and besides it's not that hard to send back the orginal pistons and get the 0.20 over IF needed..but a GOOD machine shop should know enough of what there doing to notify ya if you need different size pistons...but thats just my take on it...

[Screamin4banger]

Quote:

Originally Posted by lancerman23 ...and besides it's not that hard to send back the orginal pistons and get the 0.20 over IF needed..

yes and no... depends on where you are getting your pistons... might have to pay a re-stock charge.

[cawcislo]

Back to the original question of what you need to do to the tbi block. You'll need to drill the area for the oil return tube and probably drill out the (cross drilled) holes between the cylinders for better turbo engine cooling. ARP hardware. Ensure the tolerances for the turbo venolia pistons are available to the machine shop because I think they're pretty loose (that's why they're so noisy until they warm up).

[4Daytonas]

You and zippita have the same questions ---get together!! It looks like a double post here!

[lancerman23]

took the head off my 2.2 and then off the common block and the cross drilled holes match up...i thought was wierd...o well so yea i'll check for piston clearance and so forth..and 4Daytonas....who the heck is zippita? havent seen that name on this post?

[cawcislo]

Quote:

Originally Posted by lancerman23 took the head off my 2.2 and then off the common block and the cross drilled holes match up...i thought was wierd...o well so yea i'll check for piston clearance and so forth..and 4Daytonas....who the heck is zippita? havent seen that name on this post?

You will be missing the cross drill holes in the engine block. That's what you will have to drill out.

[4Daytonas]

Quote:

Originally Posted by lancerman23 took the head off my 2.2 and then off the common block and the cross drilled holes match up...i thought was wierd...o well so yea i'll check for piston clearance and so forth..and 4Daytonas....who the heck is zippita? havent seen that name on this post?

Click on Forums--Click Engine Blocks--yours
87 2.2 vs 90 2.2 tbi blocks Lancerman23
Piston Ring Gap somebody
Block interchangeability Zippitta
you guys must be twins!Read his thread

[lancerman23]

awe my bad sorry guys... hey i was checking on the cross drilled holes...and like i said earlier (and im not trying to be stupid or a pain in the butt) but the holes line up perfect on the common block like they do on my 87 T2 block...what would really help is if anybody has any pictures i could see ? im pretty sure i know what holes your talking about... i mean the head gasket from my 87 T2 lines up perfect on the CB? so is there going to be a problem? i thought somebody said earlier that all 89+ CB n/a or not all had the cross drilled block and heads for better cooling?..help me?