A b series with forged pistons and rods is loud as compared to a stock b series. is this because of the piston material? would a teflon coat on the piston skirts help to quiet the engine down?? thank you for all the replies!!!

 

Performance forged pistons run looser tolerances than stock pistons, which makes them louder at least until they warm up. Also built engines generally have no noise suppression designed into them like resonators and stuff. I doubt a teflon coating, or any coating that can take up the clearance under expansion and contraction, would last very long.

 

I have the Swain tech poly moly on my skirts and it is still noisy

 

no ****? keep em coming guys. would it be better to tighten the tolerances piston to cyl clearance to quiet it down?? let me know thanks

 

Well you can't really tighten it. Forged pistons tend to expand more than OEM pistons when they heat up so the manufacturers are required to make the tolerences a bit looser. The sound really isn't all that bad, you get used to it.

 

i just got my d series built, eagle rods and endyn rollewwaves, even when warmed up it soind like one of those diesel pickup trucks, is that normal?

 

Maybe the person or shop that did your motot bore it little to big.so it won't seize on you and no come back.... cause all machine shop do that to save there butt....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vha27 &raquo;</TD></TR><TR><TD CLASS="quote">i just got my d series built, eagle rods and endyn rollewwaves, even when warmed up it soind like one of those diesel pickup trucks, is that normal?</TD></TR></TABLE>

My **** does that too; runs strong though so I'm not too worried.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20T &raquo;</TD></TR><TR><TD CLASS="quote">Maybe the person or shop that did your motot bore it little to big.so it won't seize on you and no come back.... cause all machine shop do that to save there butt.... </TD></TR></TABLE>

Hell yea, they bored my block larger than I wanted

 

you are suppose to size the bore to fit the pistons to ensure the proper clearence.

if you run a higher lift/duration cam it will make more noise

 

Piston silicon content can also be a factor. See informatin here:

http://www.g2ic.com/forums/sho...63559

 

i also go my head reconditioned, new valve seals, valves cleaned and valve seats machined (reamed?) does this usually contribute to noise levels?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vha27 &raquo;</TD></TR><TR><TD CLASS="quote">i also go my head reconditioned, new valve seals, valves cleaned and valve seats machined (reamed?) does this usually contribute to noise levels?</TD></TR></TABLE>

nope.

forged pistons are noisy due to the different wrist pin design.