3V heads (was Re: [DeTomaso] 2V heads0

[adin at frontier.net]

As Dan noted, the CHI 3v heads kicked diff at the Engine Masters Challenge.

If one plans on actually driving a car, instead of just being KOD  
(King of the Dyno) then some investigation into "but some drag racers  
are struggling to go any faster than they did with their previous 4V  
head/Strip Dominator intake combos" would be wise.

Just throwing the latest/greatest zoomie part at a motor only depletes  
resources.

I would say:  determine planned use, carefully analyze driving habits . .

then match all components to these needs.

If you build a 8000 rpm monster, but only putt down to the show and  
shine or the "1800Hotrods in the park" show you won't be happy.   
Besides having a cool motor, that is.

Ooops, I just fell off the soapbox . . . .

Dirty and Grouchy, in Durango


Quoting Daniel C Jones <daniel.c.jones2 at gmail.com>:

>> What about the Aussie 3V heads?
>
> Specifically what are you asking about?  CHI makes a relocated port
> aluminum cylinder they dubbed the 3V.  It's available in 185, 218 and
> 225 cc port volumes.  They require dedicated intake manifolds.  The
> CHI intake is a very tall (about the height of a Strip Dominator with
> a 2" spacer) single plane.  A dual plane intake slightly taller than
> but similar in appearance to a Ford Boss 351 intake is available from
> a third party.  No word on how well it works.  Price on a standard
> assembled head was on par with Edelbrock 2V heads but the matching
> intakes were $650 last time I checked.  Prices are subject to change
> with the exchange rate.  CHI makes a 4V version which is essentially
> the 3V port opened up to match a 4V intake manifold.  CHI also makes
> a version with a 2V port opening.  Exhaust port is slightly raised
> relative to a 4V head.  The Pro Comp 351C heads are copies of the
> CHI 2V's but have recessed seats and don't flow as well (hardware
> is suspect as well).
>
> A friend ordered an upgraded set of the CHI 4V heads but when the
> heads arrived they were fitted with the base Ferrea 5000 valves and
> springs.  CHI was quick about correcting the mistake.
>
> The flow numbers for the 218 cc 3V look pretty good and they've proved
> themselves in the EMC but some drag racers are struggling to go any
> faster than they did with their previous 4V head/Strip Dominator
> intake combos.  For Panteras, I still like the C302B and Brodix BF300's
> better but the CHI heads are pretty good.
>
> Dan Jones
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