Reply to "CHI 3v Heads- Which exhaust system?"

> I'm told that the 3V-185cc heads will make more power along with better
> throttle response than their 4V heads.

Which intake are you planning to use? CHI makes the 185cc 3V port
and the 218cc 3V port (now called a 225cc for marketing purposes
since AFR and others make 225cc heads). The intake selection for
the 185cc port is limited to CHI 3V very tall single plane. The
218cc port will mate up to a CHI single plane or Scott Cook's dual
plane. We have one of each here to dyno test.

> My concern with the 3V heads is the non-stock exhaust port location
> and want to avoid exhaust system fitment issues.

The location difference isn't large but some headers are very tight
on vertical clearance.

> I was hoping to be able to use off the shelf GTS type headers bolted to
> GTS exhaust/ mufflers.

The GTS headers did well in our dyno tests but we lost 50HP through
the GTS mufflers. 3" inlet/outlet Magnaflow mufflers got it all
back.

Whatever you do, have an OR bung welded in for
tuning with a wideband.
Dan Jones