D666S

Thank you very much Jerry, but what kind of material that hose is? aluminium? don't you have heating problems with the headers which pass really close to the hose? i mean the temperatures over there are extremely high and could melt the hose, that my garage recommend not to use that kind of material (only temporary) and to use stainless steel tube...

i'm really confused now!!! do you have some more pics to show them? does your garage recommend to put that hose and let them without futures problems?

thanks a lot,

David

cobalt

This how mine was done.

38D

When they crack, it normally is where the wastegate pipe joins near the turbo flange. I agree that yours look like bad welds.

D666S

Hi Frank, have some pics of the left side? pretty complicated one!! Also, what kind of material is this? It's like a household heating hose? Is it both sides aluminium recovered?

thanks, regards,

666

NineMeister

A long time ago we used to buy in PowerHaus headers for our 930 turbo conversions, later finding out that they were made by B&B. In general they did the job well enough until at some point customers began to suffer with pipe fractures and after repairing 3 in a month we decided that something had to be done about it, so rather than continue complaining to deaf ears (albeit from across the pond) we simply made our own jig and fabricated our own version of the header:
http://www.porschetuning.co.uk/html/...204&parentid=2
Putting it simply, all the manufacturing problems mentioned above were addressed by making the headers from high quality (food grade) 1.5" stainless steel pipe with constant wall thickness bends and by argon purge welding all the header pipe joints. After putting them into production in 1999 we have made around 10 sets of headers a year and to date have not had one pipe failure, including one set that was accident damaged (we re-made the rhs header, the lhs one survived with a new collector).

The website data is a little out of date - we have seen 490fwhp from a 3.3 930 and 525fwhp from a 3.6 turbo when using these headers with our ballrace turbo package, so don't let anyone tell you that the 1.5" pipes are a problem, although we can make a custom 2" version for engines above 600fwhp. We usually recommend a wastegate upgrade (we use the Turbosmart) and obviously any wastegate flange can be incorporated on the header when they are being made.

Frank 993 C4S

It looks like aluminum. Both sides are aluminum. I don't trust the guys that did the install so not sure this should be copied. Here's the other side:



Pls disregard the oil leak.

JamesE

Colin (9m), made me a custom set of headers to replace my GHL's, due to material increase in BHP. I have to say they do look very well made. Also, although replaced and after modifying the wastegate pipe, the GHLs have lasted well.

JET951

what do you mean by... "due to material increase in bhp"

JamesE

After we had modified the car the GHL's became a restriction, so 9M built me a new set.

cobalt

Colin,

Your Site claims a 50 hp inrease using these headers. I am assuming that is with a cat delete. What other modifications did you do to a 3.6T to achieve 525fwhp other than the ballrace turbo?

nathanUK '81 930 G50

Hi Anthony. I think Colin is quoting Jonathans / JBL930s car.

NineMeister

The 50hp increase refers to typical gains that we have seen with the headers fitted to a 3.3 930 turbo.

The 525hp figure does not refer to JBL's 930, it is the result we have achieved from a similar package fitted to a 3.6 turbo engine (440rwhp). The engine had around 80k miles on it and was rebuilt to cure oil leaks, so whilst it was down we fitted reconditioned cylinders (stripped, bored, re-nikasil, honed), 964 cams, ported heads and intake manifold, 9m headers, 9m ballrace turbo, wastegate, 1.0bar spring, 7th injector, cat bypass (for turbo and wastegate).

underpsi

i have the same crack issues on my b&b headers, i can even smell exhaust inside the car when i have the heat on; so i just don't use the heat anymore. i have called b&b about this issue before and they will not do anything about it.

cobalt

I had read some of your info on gains you have achieved on the 964 forum and it all sounds quite impressive. However, what you are achieving with the 3.6 turbo appears to be a bit more optimistic than most say would be safely achievable. Maybe you can help me understand this better.

It may be your set of headers but my similarly designed B&B's only gained me a 25 rwhp increase and I have seen similar gains on several other 3.6T's. 50 seems quite a bit on the high side over what I have seen. Also could you clarify why you changed the cams? I was informed the cam on the 964 and 3.6 T are the same other than some variations for the air pump. Both use the 964.105.247 cam. The 3.3 still used the 930 cam. Did you increase displacement when you bored out the cylinders and if so what to? I would like to safely see 400 rwhp out of my engine without doing a tear down or using a 7th injector. Is this achievable and would a fuel head modification be a safer approach over the 7th injector?

Boeing 717

Brian at GHL emailed me back and told me that they would only charge 50.00 to fix my exhaust system and check for problems inside the heater box. Thats pretty good if you ask me.

JERRY