Evans Aluminum Heads

[Jumbogem29]

Was looking at a new set of Evans heads on eway for sale for a flat head any one running them thanks

[tubman]

They're all pretty much the same. The important part is that any heads need to be custom fitted to the particular engine to obtain optimum quench. See the thread By "GB Sisson" entitled "276 stroker from 35 years of parts"; it has just about everything you need to know.

"New" Evans heads? If they really are, I'll bet they are super expensive.

[Bored&Stroked]

Post some pictures of the combustion chambers - many of us can tell just by looking at them whether or not we'd recommend using them.

[Bored&Stroked]

If these are the NEW ones that are on places like eBay, they are a modern product - the chambers are very different from the originals.

From looking at the pictures, they appear to be well made, I'd not be afraid to consider using them.

[tubman]

Someone must be re-popping them. Any idea who? The price is quite reasonable.

[Jumbogem29]

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Thanks guys yea they are on eway nice looking heads and has a decent price on them just looking for more info and thoughts

[Bored&Stroked]

The chambers appear to be quite big over the transfer area - so compression will be down as compared to many other heads, but flow will probably be good. In the end, it will probably make no difference. I would use a gasket and blend any sharp edges (in the middle areas) - as they appear to be inside the normal gasket profile.

[petehoovie]

[47topless]

Pay it if you want the "Bling". If looking to increase performance, angle mill the stock heads (per 'Ol Ron).

[cadillac512]

Check this out...same chambers on these "Edelbrock" heads on ebay. Very strange.


https://www.ebay.com/itm/39502650549...G4B4Z5ZHAGD05F

[petehoovie]

Originally Posted by cadillac512

Check this out...same chambers on these "Edelbrock" heads on ebay. Very strange.


https://www.ebay.com/itm/39502650549...G4B4Z5ZHAGD05F

[Bored&Stroked]

Edelbrock changed their chambers in their "modern" head quite a few years ago. Truthfully I liked their original cast chambers better. But, they are milling the valve pockets way deep - probably to reduce the amount of tech-support bitch calls.

These new Evan's heads have a deep radiused transfer area (like stock heads) - so compression is probably low on a stock displacement deal - but cubic inches always help compression so make em' big boys!

[Ol' Ron]

The combustion chamber of these new heads are not that bad for a street engine, However the spark plug iz in the wrong place. Any place would be better than here.
Gramps
You buy them books and all they do is eat the covers!!

[Jumbogem29]

I was told they only make this head in 75cc because people wanted bigger chambers so they can use regular gas makes sense .

[Bored&Stroked]

They're just making up stories. You can run regular gas all day with the higher compression heads and how many folks are really worried about using regular vs premium in their flatheads . . . that few drive more than a couple hundred miles a Summer.

[flatford8]

“You buy them books and all they do is eat the covers!!”.......
The ‘Ol Boy has still got his sense of humor!!.......Mark

[Jumbogem29]

Thanks thses heads come in 70cc not the 75cc i was wrong in previous post yea they look just like the Edlebrocks

[Bored&Stroked]

Note, from what I can tell the transfer/relief area of the chambers on these new Evan's heads is much deeper than Edelbrock's are. You can see that in the pics - seems pretty obvious to me.

The Evan's heads have a transfer area much like a stock head.

[Jumbogem29]

So would you run these nice looking heads though

[Bored&Stroked]

They look nice - can't claim to compare/contrast their performance to others (have never ran them). Nor can I comment on the quality of machining, hole placement, etc..

In the end, run what yah like!