Questions about ported E7\'s & ported stock EFI intake (long post, sorry)

I recently acquired a set of what look to be nicely done E7's. I know they aren't "hogged out" and are not even gasket matched...in other words, it appears they are more "polished" than "ported" IMO. The exhaust "bumps" are gone, and the portes look to be mildly reshaped. I added a little sandpaper roll work myself just to basically finish what someone else started.

My question:
Being that these heads have stock size valves, would it be pointless to "open up" these heads, like shown in the TECH DEPT. section, or might I be forcing the valves and porting work to fight each other by doing that? In other words, if the ports now flow to their potential, should I even consider bigger valves?

My next question:
I also have TWO ported stock lower intakes, as well as a cut/ported/welded stock upper. Obviously, the upper is now sealed back up, so that's done as far as I'm concerned. The lowers have two different "personalities" so to speak...One was "hogged out" by me with alot of concentartion on the doglegs on Cylinders 1 & 5. The other lower has simply been Extrude Honed. Which LOWER should I use? Or should I get them flow tested and go from there?

FWIW, the upper intake ports are slightly smaller than the lowers...the cylinder head intake ports are slightly larger than the intake. The head's exhaust ports are slightly smaller than the header openings, so I "HOPE" I'm thinking right and believe that I shouldn't have any "man-made" flow obstructions with this setup?

Sorry for the long first post, lol...

BTW, I also did some blending of the MAC header inlets since I figure that couldn't possibly hurt anything. I also opened up the headers outlets to 2-3/8", instead of the MAC stock size of 2"...I figured since I have a complete 2-1/2" exhaust, why should exhaust flow be bottlenecked as soon as it leaves the engine...


[addsig]

hello sir

Look here

http://www.diyporting.com

there is alot of info for what you want. Sounds like who ever you got the heads from must have followed these directions. You can get these heads to flow pretty good. The exhaust ports are a pain to get going though.

Jim

Thanks for that link...[img]/phpBB/images/smiles/icon_tup.gif[/img]

Check this page

http://hometown.aol.com/valakoracehe...infoindex.html

pics of a set of e7's I did a few years ago.
http://www.topham.kicks-ass.net/gall...?g2_itemId=210

I'll post some pics of the lastest set i did for my truck with 1.90 and 1.64 Valves.
The gallery pics are 1.84 and 1.54 valves.

Thanks guys. Looks like some nice work, but I basically gave up on my E7, ported stock intake project. I pretty much fell into a pair of Fox Lake Stage 1 Canfield heads, then ported a Cobra intake to go along with a stock camshaft on a 306 shortblock I threw together. My 89 Coupe went a wheel's up 12.44@109.86 (1.66 60foot) a few weeks ago and the same day I tuned it on a Dynojet to a best of 280rwhp/322rwtq. In the past week, I swapped from 373's to 410's, swapped the Cobra intake for a Holley Systemax, the MAC 1-5/8" shorty headers for some 1-3/4" shorties and added an MSD Digital 6 ignition box. I'm hoping to run 11's naturally aspirated when I head back to the track this weekend...

My WWW link below shows alot of pics and details about the project car...
[addsig]

Good morning Clevor

what size seats did you put in the exhaust port and how deep did you go. I want to put in a 1.6 valve and I have 1.625OD x .218 thick seat. - did you c'bore is all the way for your seats? Do you have any flow numbers for the exhaust port?

Jim

porting looks good
[addsig]

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On 2006-05-25 07:28, TALONS wrote:
Good morning Clevor

what size seats did you put in the exhaust port and how deep did you go. I want to put in a 1.6 valve and I have 1.625OD x .218 thick seat. - did you c'bore is all the way for your seats? Do you have any flow numbers for the exhaust port?

Jim
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Not sure what size seat he put in the heads all i know is they are for a 1.54 valve. I'll call him and ask what size he uses.

In the pic above I did not use seats I just cut the head for the 1.6 valve, as of 5000 miles it still runs as strong as the day i built it. it's got a 270s cam and the adjustment never changes.