Is anyone using Zipper's Oversize throttle body? Does it work well on a stock engine with simple mods like ..topless, pipes, PCIII or R/T?
INTERESTING QUESTION,I'AM SURE IT HELPS AT THE TOP OF THE RPM BAND.rmmccon said:Zipper's website says it provides excellent results in stock OR modified engines. The throttle body is increased from 53mm to 58mm.
It all comes down to what is the weakest link. How about just changing the CAMS on a stock motor? Any gains?Paul Diener said:Rick,
Don't waste your time changing throttle body on stock displacment motor. No gain. We also used ported heads with 40/34 mm valves on stock dis. with diff. cam timing on stock cams and still no real gain. I think that the stock T.B. is large enough it stock RPM. I have tested a modified engine that was still stock Dis. but turning it way past the normal RPM in that case the bigger T.B. made a big difference.
Wild Bill said:It all comes down to what the is the weakest link. How about just changing the CAMS on a stock motor? Any gains?
By the time you do all that, you might as well do the big bore kit.brent_walkoviak said:That was the first thing I did to mine way back when. I believe I saw about about 4-7hp along with going topless then. Was it worth the $$ figure $600 + labor = $1k approx..... waiting and doing at least head porting at same time will probably result in better bang for the buck.