243 head guys come in??
243 head guys come in?? 
04-19-2010, 02:29 PM
#3
I have 243 heads, but they are cut and CNC'd by TEA to 61cc chambers. Cam 224/230 with Caddy Lifters, GM MSL Head Gaskets 7.350 Push Rods.
You really have to measure to get the right PR length for your app...too short you got a nice sewing machine, too long and you will have some float goin on.
MEASURE is the best I can tell ya.
You really have to measure to get the right PR length for your app...too short you got a nice sewing machine, too long and you will have some float goin on.
MEASURE is the best I can tell ya.
04-19-2010, 03:30 PM
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yea, i plan on messuring, but i was hoping to get some close. im cutting it close. trying to be running by the weekend and push rods will hold me up. i have 7.4 and 7.450 in my tool box. i was hoping to get the other common size and order them so i have them here. i will messure, find what i need hopefully have it and return the others. so i was hoping to get some info from guys who have a close set up, buy them and have them ready.
right now i will probably buy some 7.350 to add to it. any one else?
right now i will probably buy some 7.350 to add to it. any one else?
04-19-2010, 11:38 PM
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i messured today without cutting. 7.35 is close. once im cut i think 7.300 but we shall see. i ordered 7.250 to 7.375 and i have 7.400 and 7.425 i should be covered. lol
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04-20-2010, 05:04 PM
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i had the 7.400 from an old motor i did, i got the 7.425 to use with my 5.3 heads which i didnt use. the others im getting from a local speed shop that i have spent enouph money at they can put there kids through collage so what ever ones i dont use i will send back
04-21-2010, 03:11 PM
#12
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I've got 243's milled .008", GM MLS head gaskets, LS7 lifters, EPS 226/234 cam, running 7.375" PR which puts me at .090" lifter preload. Measure your setup, it's the only way to be sure.
04-22-2010, 08:24 AM
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again, i plan on messuring, im not stupid here. i was just trying to get info on whay people where using so i could have them on hand. i have every size everyone has mentioned plus i got 7.250 and 7.300 so i should be covered.
04-22-2010, 09:19 AM
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04-26-2010, 07:54 PM
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What valves are you running? IIRC, LS6 valves are .050" longer to accomodate the smaller base circle on the LS6 cam. Otherwise, if a valvejob has been done, or the valves have been sunk at all, your results will vary.
It sounds like you have enough pushrods to make anything work, and as long as your measurement at 7.3500 takes lifter preload into consideration, you should be fine.
Good luck!
It sounds like you have enough pushrods to make anything work, and as long as your measurement at 7.3500 takes lifter preload into consideration, you should be fine.
Good luck!
04-27-2010, 07:30 AM
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so i start messing around with installing push rods. i put a couple in and rotate the motor to be sure it looks good.
hhhmmmm, what the hell the exhaust valve is hung open a bit. check it out, move the pr's to the next hole, set it up rotate, same thing. start bashing my head against the wall, i just didnt get it. call my buddy over he looks at it, we go to another hole, same thing. take it apart start really looking at ****.
in my box of 16 push rods that are suposed to be 7.350 there are 3 push rods that are 7.450 unreal!!! i messured the 7.400's and they would work for me to atleast fire the car up. cranked the car till i saw oil pressure, tossed the plugs in, hit the key and boom, fired right up.
sounded good. open headers tho so i got to run it for about 4 min till the lady next door had a bird.
put it up changed the oil and went to put the new tranny in and ****. the bell housing hits a couple of the rear bolts. oh well. gonna have to grind it out a tad in a couple spots.
getting close tho, ordering a new yoke today, i think my old drive shaft should work
hhhmmmm, what the hell the exhaust valve is hung open a bit. check it out, move the pr's to the next hole, set it up rotate, same thing. start bashing my head against the wall, i just didnt get it. call my buddy over he looks at it, we go to another hole, same thing. take it apart start really looking at ****.
in my box of 16 push rods that are suposed to be 7.350 there are 3 push rods that are 7.450 unreal!!! i messured the 7.400's and they would work for me to atleast fire the car up. cranked the car till i saw oil pressure, tossed the plugs in, hit the key and boom, fired right up.
sounded good. open headers tho so i got to run it for about 4 min till the lady next door had a bird.
put it up changed the oil and went to put the new tranny in and ****. the bell housing hits a couple of the rear bolts. oh well. gonna have to grind it out a tad in a couple spots.
getting close tho, ordering a new yoke today, i think my old drive shaft should work