Pennock's Fiero Forum
  Technical Discussion & Questions - Archive
  Some word of advice about FOCOA headers (warning lots of pics)

T H I S   I S   A N   A R C H I V E D   T O P I C
  

Email This Page to Someone! | Printable Version


Some word of advice about FOCOA headers (warning lots of pics) by 88formula
Started on: 06-30-2001 08:14 PM
Replies: 8
Last post by: 88formula on 07-02-2001 05:58 PM
88formula
Member
Posts: 2361
From: Worcester, MA
Registered: Oct 1999


Feedback score: N/A
Leave feedback

Rate this member

Report this Post06-30-2001 08:14 PM Click Here to See the Profile for 88formulaClick Here to visit 88formula's HomePageSend a Private Message to 88formulaDirect Link to This Post
I purchased the FOCOA headers for my 3.4-liter engine rebuild and swap. I have taken some pictures for those contemplating on purchasing these headers to show you what to watch out for. First I want to say that these headers are of good quality. They fit almost perfectly to my engine and everything needed to install them is included. The welds are tight and clean. Some people have told me that FOCOA doesn’t deliver their headers on time. I got my headers on time. In fact I got them earlier than they said I would get them and they were packaged securely. The flanges are nice and thick too.

There are a few issues though as there is always with high performance parts. I had FOCOA coat the headers for me so that they wouldn’t rust and the engine compartment temperatures would stay down. Apparently not all of the inside of the headers are coated. There are some parts of the runners that appear to not have gotten coated and I can see them starting to rust from the humidity in the air. I’m not talking about little specs but inches of runner than have not been coated. I can see them with a flashlight. I understand that this is not there fault and I will call them about it Monday.

The crossover pipe collector has a flange welded into the opening that has metal that protrudes into the inside of the pipe. This protrusion of metal or flange will cause turbulence in the collector reducing flow. The front header pipe collector has one runner that sticks slightly into the collector partly blocking off the flow from the other runners.

All of these issues can be addressed with an air grinder and stone. Once this has been taken care of than you will have a great set of headers. I recommend that if you do purchase these headers that you purchase them not coated so you can grind out these areas and then have them coated yourself. Again I’m not bashing the FOCOA headers, I just want you people to be aware that in order to get them perfect you will have to do some work to them. They are still a great set of headers but they are not finished to my satisfaction. If I could go back I would still purchase them but I would get them without the coating, address the flanges, and then have them coated.

Here are some pictures of the headers. This is a picture of the crossover collector that has the metal flange protruding into the collector. See red arrow.
This is the runner that intrudes into the path of the other runners in the rear header. It's hard to tell in the picture but it's there. You can also see the uncoated runner in to top right and see the rust if you look close.
The flanges are nice and thick and the openings are nice and large.
The headers went together without any problems and they fit very well.
The front of the header or firewall side.
The rear or trunk side.

------------------

[This message has been edited by 88formula (edited 06-30-2001).]

[This message has been edited by 88formula (edited 06-30-2001).]

[This message has been edited by 88formula (edited 07-02-2001).]

IP: Logged
PFF
System Bot
sjp777
Member
Posts: 613
From: San Francisco, CA
Registered: Apr 2001


Feedback score: N/A
Leave feedback

Rate this member

Report this Post06-30-2001 08:26 PM Click Here to See the Profile for sjp777Click Here to visit sjp777's HomePageSend a Private Message to sjp777Direct Link to This Post
Damn, those are friggin huge!

------------------

88GT 5sp, in desperate need of an LT1
http://www.geocities.com/fiero88gt1/

IP: Logged
West Coast Fiero
Member
Posts: 2044
From: Los Angeles, CA, USA
Registered: Jun 2001


Feedback score: N/A
Leave feedback

Rate this member

Report this Post06-30-2001 08:49 PM Click Here to See the Profile for West Coast FieroClick Here to visit West Coast Fiero's HomePageSend a Private Message to West Coast FieroDirect Link to This Post

this will not create turbulance as these 3 pipes are going into a larger opening, however you will find problems if you have a manual transmission as the shift cables ( or shift cable if you have a 5 speed ) sit on the y-tube, this can be corrected with a dimple formed on the Y-tube by heating it with a torch and formed with the tube laying on a firm, hard surface so it does not distort where the flanges meet the manifolds

Eric - West Coast Fiero www.cwestco.com
310-305-4111

IP: Logged
88formula
Member
Posts: 2361
From: Worcester, MA
Registered: Oct 1999


Feedback score: N/A
Leave feedback

Rate this member

Report this Post06-30-2001 09:04 PM Click Here to See the Profile for 88formulaClick Here to visit 88formula's HomePageSend a Private Message to 88formulaDirect Link to This Post
Chris West your right about that firewall collector but the one for the crossover pipe will because the flange piping sticks into the pipe opening about 3/8".

I didn’t think about the shift cables. They did need to know if I had an 88 and if it had the manual transmission.

IP: Logged
Fierowrecker
Member
Posts: 1858
From: Lowell, MI. USA
Registered: Mar 2001


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-01-2001 01:48 AM Click Here to See the Profile for FierowreckerClick Here to visit Fierowrecker's HomePageSend a Private Message to FierowreckerDirect Link to This Post
Can you get those without the EGR tube?
crash...
IP: Logged
88formula
Member
Posts: 2361
From: Worcester, MA
Registered: Oct 1999


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-01-2001 08:54 AM Click Here to See the Profile for 88formulaClick Here to visit 88formula's HomePageSend a Private Message to 88formulaDirect Link to This Post
NO
IP: Logged
West Coast Fiero
Member
Posts: 2044
From: Los Angeles, CA, USA
Registered: Jun 2001


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-01-2001 02:26 PM Click Here to See the Profile for West Coast FieroClick Here to visit West Coast Fiero's HomePageSend a Private Message to West Coast FieroDirect Link to This Post

unfortunately this is a common manufacturing flaw in MANY header designs for many vehicles, essentialy it comes down to a header that is designed best to thier opinion. The ammount of actual horsepower loss would be in my guess 1 to 3 hp, if even that, so that is why it is not seen as that critical

Eric - West Coast Fiero www.cwestco.com
310-305-4111

IP: Logged
1FST2M6
Member
Posts: 3905
From: Dallas, GA.
Registered: Jan 2000


Feedback score: N/A
Leave feedback





Total ratings: 66
Rate this member

Report this Post07-02-2001 11:03 AM Click Here to See the Profile for 1FST2M6Click Here to visit 1FST2M6's HomePageSend a Private Message to 1FST2M6Direct Link to This Post
is thsi gunna be a forced induction or sprayed engine? it's too bad you couldn't dyno stock vs these...
IP: Logged
88formula
Member
Posts: 2361
From: Worcester, MA
Registered: Oct 1999


Feedback score: N/A
Leave feedback

Rate this member

Report this Post07-02-2001 05:58 PM Click Here to See the Profile for 88formulaClick Here to visit 88formula's HomePageSend a Private Message to 88formulaDirect Link to This Post
Just talked to Phil Huff, what a great guy. He says that the coating place they use sprays the headers and that they cannot get all the way inside the runners with the sprayer. The coating they use cannot be dipped. He said that he used to use the Jet Hot coating but had problems with the coating flaking off, Jet Hot dips them into the ceramic coating instead of spraying them. He said that the place he uses now does the best job that he has seen and that he has never had a problem with there coating coming off. The outside coating on my headers is very good; I was just worried about the outside.

He told me that he guarantees that the headers will not rust. If they do I just have to send them back and get another set or have them fixed.

The part about the coating being half ass, well that is because I don’t know much about ceramic coatings, it was my ignorance. I take that comment back.

1FST2M6, I can’t have these headers compared to the stock manifolds on a dynamometer because for one I don’t have the original manifolds anymore because I sold them. Two, each dynamometer run cost about $100 and I don’t think that’s money well spent. Three, it’s a ***** removing and putting the manifolds back on with the motor in the car.

Phil did say however that he took a stock fiero with 60k miles gave it a tune up and put it on the dynamometer. It put down 110 horsepower to the rear wheels. He then within hour and a half later put the FOCOA headers on the same car and ran it on the dynamometer again. This time he said it laid down 135 horsepower to the rear wheels.

He also said that ported manifolds showed a 10 horsepower gain on the dynamometer. I don’t know if there really is that much hidden horsepower in the fiero’s exhaust system. If there is than the stock manifolds must be really restrictive and there must be a lot of back pressure in those manifolds. All I can say is that I’m sure that these manifolds are going to really wake up my 3.4-liter engine. I have talked to one guy in my area in person at a fiero show who had them put in his 2.8-liter engine. His exact words were when I ask him if he could feel a difference were “It definitely has more nut know”.

The person who builds these headers builds headers for racing engines according to Phil. The guy who builds these headers doesn’t like to build a lot of headers all at once because he makes more money building headers for racing engines than he does for fiero’s. This is why it takes so long to get them sometimes. It’s not Phil’s fault as some people make it seem. With the exception of the crossover flange sticking into the collector (I’m just overly picky) the rest of the construction is some of the best I have ever seen for a custom set of headers, it is excellent. The welds are perfect. The pipes fit excellent. The flanges are supper thick 3/8” and they are one piece flanges. He even gives you the copper silicone sealant with all the hardware you need to install these headers on the car. This is why he probably has sold about 1000 sets so far and has only had one come back because the guy wrapped them in that heat insulation that retains water. In the instructions he says not to use this wrap on these headers.

[This message has been edited by 88formula (edited 07-02-2001).]

IP: Logged



All times are ET (US)

T H I S   I S   A N   A R C H I V E D   T O P I C
  

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock