These are very rare heads, with rare titanium intake valves. Check out this flow chart of falconer heads vs. stock heads. Specifically the exhaust side is much better at all lift points, and a person running forced induction would greatly benefit from these.
Also, these flow numbers were taken before the valve job was done:
Originally posted by Oslo: These are designed for any GM iron block 60 degree v6.
Let me know if you have any questions.
Oslo, I'm intrigued by this sale partly because when I've purchased from you in the past, you've provided me quality parts, as advertised, and I've received them promptly.
I opened the eBay link you posted and it provides a good number of pics. However, I'm interested in something I didn't see mentioned in that link.
What would be the compression ratio of a pushrod 3.4L 60o V6 Camaro engine equipped with those Falconer heads? (IIRC, a stock 3.4L is 9.0:1.)
That is an interesting question. I guess I don't know exactly as I'd have to do some research and get back to you.
These heads are simply stock 2.8L Fiero heads which were machined by the Falconer Racing Engines company for better performance. There should be no increase in c/r on the 2.8, and my understanding was that the 3.4 had a similar c/r.
As far as I know the only increase in c/r on either engine would be a very minimal increase due to the deck of the head being shaved for resurfacing. The slightly increased c/r should not hurt economy or driveability, but minimally increase horsepower.
edit: I should point out that these heads are assembled and ready to run.
[This message has been edited by Oslo (edited 06-21-2009).]
Originally posted by Oslo: That is an interesting question. I guess I don't know exactly as I'd have to do some research and get back to you.
These heads are simply stock 2.8L Fiero heads which were machined by the Falconer Racing Engines company for better performance. There should be no increase in c/r on the 2.8, and my understanding was that the 3.4 had a similar c/r.
As far as I know the only increase in c/r on either engine would be a very minimal increase due to the deck of the head being shaved for resurfacing. The slightly increased c/r should not hurt economy or driveability, but minimally increase horsepower.
edit: I should point out that these heads are assembled and ready to run.
IIRC, 2.8L Fieros had 8.9:1 compression, and the `93-'95 3.4L Camaro/Firebird engines had 9:1 compression. As you probably know, how much Falconer shaved the heads would affect what a 3.4's compression is increased to with these heads.
Basically, I'm trying to learn everything I can about these heads, and in particular, whether or not these "Falconer Racing Cylinder Heads" are quite streetable on a year-round, cold-climate, daily driver 3.4L --- as is, without employing either racing fuel or any further modifications.
For example, in another car, I've some old racing heads on an SBC, but as is, they could be quite the challenge in a year-round, cold-climate, daily driver, because they don't have a provision for heat crossover passages.
Unfortunately, I've not been having much success in my computer searches re Falconer heads. Somewhat ironically, one "answer" a Google search came up with for me was simply a then-unanswered question about Falconer heads that was asked by yours truly on Pennock's in early 2008: "Can anyone elaborate on what these 'Falconer heads' are...?"
Well I can "tell you what they are" - simply put, custom machined heads employed by this company: http://www.falconerengines.com/main.php They used them on racing motors in the early '90s.
I had these heads installed on my 3.4L PR motor in my '85 Fiero GT for almost a year, along with the H272 camshaft and the motor was EASILY streetable. It drove like a stock motor, just way more power. I removed them, had them rebuilt and tested, now they are for sale.
The only reason I'm selling them is because I'm getting into a new project.
I would be surprised if the c/r is raised more than a couple points. These were not decked specifically to increase c/r, but to make for a clean mounting surface and that is all.
I noticed that as well, but porting heads it will be very common to lose ground in some places, and make it up plus more in others.
An example is different intake manifolds on your car will increase low end torque, but decrease horsepower. It's a trade off I guess. On the exhaust side, the Falconer heads outflow the stock heads by a lot, but on the intake side, over .4, the stock heads beat out the ported heads just barely.
Originally posted by Joe 1320: Is it normal for stock intake to outflow ported intake runners? above .400 lift it looks like the stockers are better?
quote
Originally posted by Cooter: That "shark fin" in the stock ports is actually good for something.
I agree with this comment about the "shark fin." However, is the implication of Cooter's comment about it above that the Falconer heads here are missing the shark fin, and that as might be inferred from the flow numbers below, the missing shark fin could be causing the stock heads to outflow the Falconers above 0.400" lift on the intake?
quote
Originally posted by Oslo:
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04:38 AM
PFF
System Bot
Pyrthian Member
Posts: 29569 From: Detroit, MI Registered: Jul 2002
These heads really shine in performance on the exhaust side. Like I said, you always give up something to get something in return. Maybe these could have been done differently to get more intake flow, but the exhaust flow gains are incredible.
Since the auction ended, I have a question. I have a 3.4 in a 94 Camaro, RKSport headers and borla exhaust. These heads would be a great upgrade, especially if/when I add the turbo. In any case, the intake manifold on these are TERRIBLE. What would be a substitute that will fit in the f-body chassis to take advantage of these heads?
------------------ Competition Yellow 84 2.5 Bone stock right down to electrical gremlins and an 87 328 replica.
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01:36 PM
jgrotzin Member
Posts: 349 From: Rocheport, MO Registered: Nov 2005
You might try trueleo.com http://www.trueleo.com/index-old.htm I have heard pretty good things and have dyno results to show improvement. The owner is also a fiero guy on here and very helpful.
You might try trueleo.com http://www.trueleo.com/index-old.htm I have heard pretty good things and have dyno results to show improvement. The owner is also a fiero guy on here and very helpful.
Ouch. $600 for an intake to show marginal gains doesn't seem very cost effective? The FWD version heads and intake flow as well for chump change by comparison. There's gotta be another way......
Right now there are really only 2 viable options, the Trueleo intake, and the intake from West Coast Fiero (Starts at $700! )
I predict that even with a stock or ported stock manifold, these heads would still allow you to see some gains. I'm going to be putting these heads up for sale again on July 12th on ebay.
couldnt find anything concerning them .....
