dizzy616 183 Posted July 6, 2013 so im pretty sure ive read it somewhere. but can you actually put 351 clevo pushrods in a 250 cross flow? are they actually any stronger if so? Share this post Link to post Share on other sites
hendrixhc 10,921 Posted July 6, 2013 Not sure bout the push rods but i have seen the roller rockers used. I guess if the length is the same and diameter then there wouldnt really be any issues. Share this post Link to post Share on other sites
gerg 10,871 Posted July 6, 2013 so im pretty sure ive read it somewhere. but can you actually put 351 clevo pushrods in a 250 cross flow? are they actually any stronger if so? Ask Slydog, he's up on Crossys quite a bit. I seem to remember 429/460 pushrods are the go. Share this post Link to post Share on other sites
slydog 7,873 Posted July 6, 2013 BBC are the go...clevo are about 1" too short at 8.4 from memory,same size @5/16th though.I have 3/8th Trend 9.550 units in mine ATM. P.S Seeing as clevo's bend shorter rods ALOT more than x-flows bend longer ones i'd suggest staying away from em even if they were the correct length. Share this post Link to post Share on other sites
gerg 10,871 Posted July 7, 2013 Yeah that's right. I knew it was big block something. I've read that 460s are around 8-1/2". But I've also read that BBCs use 2 lengths, one for inlet, one for exhaust. The longer exhaust one is what you'd use. Share this post Link to post Share on other sites
dizzy616 183 Posted July 7, 2013 i notice some of the pushrods in my engine a different. some stock some i dont know? and would like to replace them all with stronger ones for the cam. still got stock rockers though i take it the springs should be set for the cam. got new lifters in it. i can just hear that little bit of a chatter. anyone got any recommendations on what i should get? it can hit 5k maybe a bit more. but id just be happy with ones that can handle 5k. seeing as i dont rev shit that hardits got a stage 2 cam what spec i dont know so 3/8th 9.550 is the size im looking for? is there any engines i can rip these out of with stronger pushrods Share this post Link to post Share on other sites
ando76 4,354 Posted July 8, 2013 See if you can find an XC 250. they had a tapered pushrod of the correct length. They are much stronger than XF units. I have also seen these pushrods in an XE?? I'll grab one tomorrow and try and post a picture. I stress that this is a budget option but they do work. You can get a standard XF pushrod and bend them by hand, something you can't do with the tapered ones. bent pushrods usually occur in engines with poor valve springs or incorrect poundage springs. I have a set of standard xf pushrods in my flat tappet burnout motor which I ping to 6200 and they don't bend because the springs are right, Roller rockers also help to. 1 slydog reacted to this Share this post Link to post Share on other sites
dizzy616 183 Posted July 9, 2013 got a picture of these pushrods yet? i cant afford roller rockers yet or better springs hey i was looking up the xc 250 pushrods apparently they are 9.652 x 5/16 would that even fit? Share this post Link to post Share on other sites
slydog 7,873 Posted July 9, 2013 That is the correct length dizzy... Share this post Link to post Share on other sites
dizzy616 183 Posted July 9, 2013 really. is yours a bit shorter? Share this post Link to post Share on other sites
ando76 4,354 Posted July 10, 2013 Sorry bud been a bit flat. I'll post them tommorow. Share this post Link to post Share on other sites
dizzy616 183 Posted July 12, 2013 sorry but is 9.550 going to fit then? i know a dude with some hardened ones at that length Share this post Link to post Share on other sites
Clevo120Y 815 Posted July 12, 2013 Too short unless you have had the head and block decked and run adjustable roller rockers to set it up. Share this post Link to post Share on other sites
dizzy616 183 Posted July 14, 2013 thanks for the info. im getting some hardened ones at 9.550 hopefully if that sounds right? Share this post Link to post Share on other sites
slydog 7,873 Posted July 14, 2013 No it doesnt Dizzy, you need to measure your set up to get the correct ones bro. Share this post Link to post Share on other sites
xeeclipse 37 Posted July 14, 2013 WTF would you pay for a second hand set of pushrods? 351c pushrods have the same thin construction as a 250, why make it stronger when your running the same type of cam and spring rates? Get some chevy pushrods that are .080" shorter like myself and be done with it man. Share this post Link to post Share on other sites
dizzy616 183 Posted July 14, 2013 i took my rocket cover off pulled a pushrod out measured it at 9.550. im talking to a dude with brand new hardened ones they put them in his decked block and found out their too long so never been run before. sorry dude as i stated its a stage 2 cam and i dont know what the spring rates are but i noticed half the rods are hardened and the other half look stock. so i want a full set of hardened ones in there Share this post Link to post Share on other sites
xeeclipse 37 Posted July 14, 2013 If the others are stock the rockers must be shimmed pretty heavily, if not your lifter preload is up to shit. My rods are at 9.580 or somthing like that, just order a chev 5/16 pushrod from a speed shop. Share this post Link to post Share on other sites
