Stingxray

All-new three-valve cylinder head from Barry Grant, Inc.


Barry Grant’s new aluminum three-valve cylinder heads are designed with two inlet valves of 1.4” diameter and a conventionally sized exhaust. At .500” of lift, the new three-valve arrangement produces a curtain area that is almost 40% greater than a 2.02” two-valve design.

In addition, since the inlet valves are much smaller, the valve springs are smaller and lighter. Lighter valve seat pressures allow the engine to rev higher and more reliably. (The bigger the valve, the greater the seat pressure and spring rate to control it.) Further, though the new three-valve heads demonstrate excellent cylinder filling with low-lift camshafts in production and mildly tuned engines, on high performance and racing engines they will outperform conventional cylinder heads.

Created for use on conventional small-block Chevy engines, Vortec-headed small blocks, and pre-86 Chevy LT1 engines, this new cylinder head is ideally suited for use on street and custom rods; street/strip and muscle cars; drag, oval, and road race cars; as well trucks, boats and off-road vehicles.

The advantages of this patented, three-valve, retrofit cylinder head are:


Increased curtain area not only provides better performance and drivability from mildly tuned engines, but also on engines with high performance and racing components the new “three-valve” outperforms conventional heads.

Provides exceptionally good cylinder filling with smaller valve openings.

Smaller valves require smaller and lighter valve springs; therefore, lighter valve-seat pressures, less inertia, higher revs, and more power.

On mildly tuned applications, higher valve lifts are unnecessary as low valve-lift flow is dramatically improved.

Impressive power and drivability with less wear-and-tear on rockers and springs and valve gear.

Can be easily retrofitted to all Chevy small-block and Vortec engines.

knight37128

Looks expensive and an accident waiting to happen.

Vogie

I believe a company named Feuling did this several years back for the BBC. They aren't in business anymore. Those heads were good for torque and very expensive.

Frankie the Fink

An ingenuous solution to a non-existent problem.

Read what Devildog did recently in creating a 500hp SBC with readily available, conventional, off-the-shelf components.

BADBIRDCAGE

Didn't Honda do this back in the 70's?

Rich

robert miller

This has been done befor will put out some better # on the h.p. side but not cheap plus if any one is only looking at this for a income will go out of business for sure. Barry grant has a ton of other parts out he will make it. But to me he has never done really good in the racing world per say at all. Also if it has more parts more parts to break. I will stay with what is here now. But it does look good. Just my 2 cents....

Viking427

Here's an even better design, but it seems to have stalled in their R&D dept for 11 years and counting. I've yet to hear of one set that found its way onto a private owners sbc/bbc engine. Great concept, but the only reviews in all that time seem be from their Marketing or Business development depts.
http://www.coatesengine.com/csrv.html

427Hotrod

The Coates design is the one I really like. That setup was used back in the 20's. They had issues with seals at the time....and their claim to fame was it ran better as it aged....because ports got bigger from wear! But a really cool idea. There were some dragster guys in Canada years ago that had one running.

JIM

JohnZ

Many manufacturers (including Ford, Mercedes, Honda, and others) have or have had 3-valve heads in the last 10-20 years; Feuling sued all of them, and lost.

Avispa

Yes, but not for extra intake flow. The second intake valve was small and allowed a tiny, rich mixture charge to enter the top of the combustion chamber. The remainder of the chamber was filled with lean mixture through the regular intake valve.

http://en.wikipedia.org/wiki/CVCC

Donny Brass

too complicated, I will wait for the one valve head.......

Stingxray

Looks like it takes a Custom Valve cover Also...... The lower intake spring intrudes into the gasket rail. Nice..................

NOM61

These heads have been MIA since early 2005! The photo of the chambers is from a plastic mock-up at the 2004 SEMA show.
I wouldn't hold my breath waiting for them.

DT

carbdude

There are too many other really good choices available today in both aluminum and cast iron for SB Chevy heads, to mess around with these 3 valve contraptions from BG....

and Remember this, in a street car / hot rod application torque is king, so don't think you have to go with the largest available runner size....

Large runners are great for upper / high rpm horsepower, but not so much, for seat of the pants, bottom and mid range torque.

Dude