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Topic Review (Newest First)
02-18-2013 11:00 PM
cadillacdave1 I think the EQ heads have a BETTER exhaust port than the GM vortecs. They are sold through Shaver racing and AAEQ Auto Recyclers etc.
02-25-2009 07:41 AM
barnym17 Angle plugs on the old stock chambers was worth about 12 hp with a domed piston with todays chambers it's a wash.
02-24-2009 06:52 PM
ericnova72 Some of the old myths die pretty hard-- angle plug, "fuelie"= best ever, adjusting solid cams every other day, race gas in 9-1 compression motor makes awesome power, factory 327 spins to 8500rpm, and the list goes on.

Maybe I should start a myths thread
02-24-2009 06:43 PM

thanks man
02-24-2009 06:40 PM
GenYnNC Eric's right although there's many on this board that will tell you otherwise
02-24-2009 04:02 PM
ericnova72 On modern performance heads there is no real advantage to running angle plugs except if you are running alcohol. The volume of alcohol tends to wash straight into the plug on straight plug heads. On gas, buy what will clear your headers. Powerwise, you will never be able to feel a difference.
02-24-2009 10:05 AM

I really appreciate the info man, I have one final question.... Is there ANY advantage or dis-advantage to running a certain plug style.

I will be running either hooker shorties from a camaro or I have 2 sets of Headman 1 7/8 full lenght headers. The headman's give me a LOT MORE plug room, but I'm not sure yet if they'll fit in my car. AND IF they do fit, I'll still hafta vbuy a special crossmember for them to work, which is anouther 300$$$$.

Any recomendations on what plug style to buy or which header to use??
02-24-2009 12:37 AM
ericnova72 Don't know where you are buying your studs and guideplates, but ARP studs(the only brand I buy) and any guideplates comes to $52.00 or so from Summit(for example). We got our heads from Shaver's in California while they were still ProTopline but have since been told that the EQ iron heads are the same casting (the earliest EQ ads even said so), and you can't get aluminum from EQ, only from RHS.
A quick clean-up with a cartridge roll to remove the lip left by machining that is under the exhaust seat and some slimming of the exhaust guide boss brought the exhaust numbers up quite a bit. There is no such thing as a ready-to-run aftermarket part!! (unless you pay$$$$) The sooner everybody learns that the better.
We are using the 235 Runner 2.08 intake valve 64cc chamber on an 11.25-1 383 w/solid roller, etc. Runs mid tens easily at 3500 lbs on drag radials. We are happy with them, and would buy another set without a second thought.
02-23-2009 11:44 PM
EQ heads

Her's for the EQ's
$270+25 shipping per head but I gotta buy the screw in studs and guide plates, ~ $another 100 bucks or so....

I am waitin on the guy to get back with me because I need some w/ the 72cc chamber for my 355 cuz of the domes..... I don't wanna hafta run jet fuel...LOL... 64cc would put me close to 12:1.... TOOOOOO high for premium. 72cc puts her @ about 10.2:1 static
02-23-2009 10:51 PM
GenYnNC In short I would probably be more trustworthy of EQ's machine work than Pro-Comps. But if the Pro-Comps indeed make more power then that's the trade off that you'll have to decide - Less reputable manufacturing process vs. less power. And in no way shape or fashion am I saying the EQs will make less power, all depends on the combo and I have no experience with either one, just to be clear. Eitherway, I'm sure you'll be thrilled. $700 bones fully assembled & shipped? If so, let me know how to get in contact with this outfit... that's the best gig I've heard going yet.
02-23-2009 10:26 PM
Well either way

Either way I'm looking at under 700 shipped, pc's or eq's...

Are you guys familiar with shaver's performance?? I'm tryin to figure out why his co. raves about how good the EQ heads are but he doesn't offer any of his crate engines with the EQ's on them??? Go figure.

I'd like to find somone thats running the eq's and see how much power they're makin. I too have heard about the mediocre exhaust flow, but my cam and rockers should compensate for that.... If not I'll break out the grinder!!

But White's performance is making 418HP with the PC heads A 5800 rpms with a stock 350, 9.5:1 cr, and a crane Hyd FT cam that is much smaller then the voodoo I have in my 406 and smaller then the bracket master in my 355.... I think either of my engines would surpass that # @ 10.5:1 CR and a more aggressive cam..... The 418 is on thier stage 1 crate engines.... The sheets and videos running mid 11's and driving to and from the track were quite convincing.

I can't run vortec on my 355 because of the domes that are in it.... I could on my 406, but I like the sound of 500+ HP compared to MABEY the 435 you could get from vortecs....
02-23-2009 09:58 PM
GenYnNC From the flow numbers I've read on Stan Weiss' page (google stan weiss cylinder head flow for ANY SBC or other make flow figures at various valve lifts) the EQ heads suffer from a poor exhaust port. I/E ratios are in the 60% range at .300" lift and above- pretty poor in my opinion for an aftermarket head. I am REALLY interested in the RHS Torquer (their vortec casting w/ 2.02 valves) but their testing on a 4.2" bore is really and I mean really suspect. I would be very interested to see a 4.030 bore and the corresponding flow numbers. NOT that flow numbers mean everything but they are there for a reason. With out these numbers and the EQ's lackluster exhaust port, I would lean more to the Vortec Bowtie 180's or regular vortecs. But I have nothing against the Pro-Comps, as long as the machine work is tollerable and you don't have to dish out more $$$ for correcting flaws- great price, I know that but as we all know in this hobby/buisness/profession- you get what you pay for.

Eric, I could be wrong, but I thought EQ was a totally different company than RHS or even former Pro-Topline? Because Pro-Topline was an Aussie company which Comp Parts Group bought out.
02-23-2009 06:47 PM
ericnova72 The EQ heads are the formerly known ProTopline Lightning heads. They are now sold by Racing Head Service (RHS, Comp Cams) also, the EQ's are sold unported and the RHS heads are CNC ported. The EQ's are a very good piece, pretty much an eqaul to the Dart castings. Hard to go wrong for the price.
02-23-2009 05:57 PM

What GM heads are u talkin about??? and for which motor
02-23-2009 05:36 PM
220 or 200 EQ

I am running a 3500 full competition stall, TH400 ford 9" 456 trac lock rear 3750 curb weight = ~4000 with me in it. ..... But with this many motors and this many cars that is subject to change. I've got a fox body stang that I'm thinkin of puttin a SBC in and makin it a straight drag car.
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