Header primaries? - Page 2

930gt-40r · 930gt-40r's Garage

Next year when I send out my heads for larger valves, I will most defenatly have the exhaust ports reemed out for larger primaries.

WydRyd · 04-02-2007, 01:58 PM

Quote:

Originally posted by 930gt-40r
Next year when I send out my heads for larger valves, I will most defenatly have the exhaust ports reemed out for larger primaries.

Cool - but I wouldn't go larger than 1 5/8" though.

930gt-40r · 930gt-40r's Garage

I wouldnt either, I think that is a good size for my intended use.

WydRyd · 04-03-2007, 09:32 PM

I think I'd need to get B&B to supply a set which have 1 5/8" flame rings, with a tube ID of 1.5". This will match the Carrera exhaust ports perfectly and won't have any resrictions or mismatches in the junction.

930gt-40r · 930gt-40r's Garage

I think it is a good move for your car seeing as you have the higher flowing heads.

WydRyd · 04-05-2007, 06:58 PM

BTW, B&B quoted me ~$1850 for custom headers made to my specs (i.e: 1 5/8" flame rings, with the ID of the primaries @ 1.5"). This is without heater boxes. With heat was appox $2250. All in T321 s/steel.

Good deal?

mb911 · mb911's Garage

Quote:

Originally posted by WydRyd
BTW, B&B quoted me ~$1850 for custom headers made to my specs (i.e: 1 5/8" flame rings, with the ID of the primaries @ 1.5"). This is without heater boxes. With heat was appox $2250. All in T321 s/steel.

Good deal?

seems pretty damn expensive to me

WydRyd · 04-05-2007, 07:13 PM

Agree!

930gt-40r · 930gt-40r's Garage

Damn, Are they made out of platinum? You could buy the s.s bends, tig welder, flanges, and learn how to weld for that price.

WydRyd · 08:05 PM

You think that's expensive? Guess how much Billet Design or Protomotive charge for a set of headers

I know you get what you pay for, but some of the prices I've been quoted is out of this world

Then, when people mention names like GSF or OBX, they shriek because they are cheap and don't really have a long reputation in Porsche circles.

Also, there's something about running headers with heater boxes around them that makes me shy away. I'm not a fan of wrapping already glowing red headers with heater boxes. It just accelerates the rate of deterioration of the welds IMHO. Then people wonder why they can smell exhaust fumes in their cockpit when the heater is turned on

Very dangerous solution!

I have Protomotive's engine oil cooler heat exchanger, which works OK in our climates, but the only down-side is that it requires the engine oil to heat up to operating temps before it's really effective. Your kickpanel/footwell blowers also have to be in good functional condition too

930gt-40r · 930gt-40r's Garage

Ahhh, so thats who makes that exchanger, I have worked with one of those before, I like the Idea of that.

NathanUK · NathanUK's Garage

Merv, I am not sure if you are right about the heat option for headers. With heat, yes they wrap round the headers that are very hot but remember that they have cold air being constantly pushed through them from the engine fan. I may be wrong but I would have thought that would help at idle in traffic considerably. When on the move I wouldn't think there is a great difference between the fan cooling them & the movement cooling them.

Does anyone actually know at all from experience.

Happy Easter !