07-01-2014, 04:32 AM #1
Is It Necessary to Re-Balance When Replacing Pistons?
I am preparing to spin/boost my 13' SHO past safe levels, and am trying to see if there is a "budget" way to eliminate the weak link (the OEM pistons).
Since my 13' already has the same rods as a SVHO, I am hoping to get away with replacing only the pistons for now - with either a set of CP's or SVHO's. If replacing just the pistons, is it still recommended to get the assembly balanced??
If so, then I will just have to save a lil longer and have Molnar's installed at the same time. I know that would be the right way to do it now - But am just thinking of a less spendy option to buy me some time..
Last edited by WP3223; 07-01-2014 at 05:10 AM.
07-01-2014, 05:27 AM #2
Not necessarily but every little bit of precision makes a little more reliability and power.
07-01-2014, 05:44 AM #3
- Join Date
- Aug 2006
You should at least weigh the originals and compare to the new, to see how much difference there is.
07-01-2014, 10:33 AM #4
the inline 4 cylinder is self balancing for the most part, for every two pistons going up, there are two doing just the opposite , after weighing all my pistons, rods, bearings, rings etc, I had the crank spun and it was dead on the way it was.
07-01-2014, 02:53 PM #5
Big john is right, no need to balance as if new pistons are lighter or heavier they will be balancing each other. If i where you i`ll do the rods too, you have to open the engine to change pistons anyway, put the rods all in one and you can add boost as you want in the future and dont have to worry about that.
07-01-2014, 07:17 PM #6
Thanks for all the input everyone!! Since my engine is still relatively low hours & fresh, I am trying to avoid the expense of a full b&bp rebuild.
Think I will keep it propped down slightly for now. Then just save up until I can go the CP/Molnar route & hopefully be good to go!
Last edited by WP3223; 07-01-2014 at 11:03 PM.
07-01-2014, 07:21 PM #7
07-01-2014, 07:27 PM #8
Just trying to keep my big ol FX from getting smoked by all the new SVHO hotness out there!!
Last edited by WP3223; 07-01-2014 at 09:56 PM.
07-01-2014, 07:35 PM #9
hear ya, i just finish with my sons fx, it will not pass 77 with those mods, but it has a very sick instant acceleration and rpms at 8400, can't complain i don't wanna go any faster anyways. love the way my bones are in place.lol.
07-01-2014, 07:45 PM #10
Gotta love your FX160 "sleeper" @77. Glad the build finally all came together for you Enjoy it!!
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