Given the cheap and easy power gains from extractors and exhausts, why don't manufacturers invest a bit more time and money in coming up with decent OE systems? Lots of cars look like the engine design department went flat out to squeeze decent power out of the donk, then sent it down to the exhaust design people whose motto is "Restrict, twist, turn, and choke".
Is there some technical obstacle, as distinct from a financial one? Or do they just reckon the noise would put people off? Be a lot less noisy if they were cast rather than tube, anyway. And cast would last, too.
VK fuel injected 6cyl Commodores had extractors as OE. Old HR X2 Holdens (and GTR XU-1 Toranas) had a two piece cast iron header style exhaust manifold setup. Don't recall any Fords except HOs (maybe GTs as well?) having OE extractors. It's probably a money thing.
You know, somebody actually complimented me on my driving today. They left a little note on the windscreen. It said, 'Parking Fine.'So that was nice.
Is there some technical obstacle, as distinct from a financial one? Or do they just reckon the noise would put people off? Be a lot less noisy if they were cast rather than tube, anyway. And cast would last, too. [/B]
Cast would crack with the extra heat produced from unleaded fuel and I guess the leaner conditions of efi...
Have you checked the head to extractor flange? Some are way off,I would say aligning them up would add heaps of flo.
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
Usually two reasons, as someone already said, cost and ease of fitment.
Yes, the old "250 2V" engine (XY & XA) ran factory extractors, as did the XY GT-HO Pase III, XA Falcon GT RPO83.
Falcon G.T. Club of Geelong Inc.
Deakin University Formula SAE Car PHANTOM ENGINEERING
LSUG (Leaf Spring Users Group) Twin System Engineer
Official BSR Website - www.bsrcorp.com
Poster of the 150,000th post!
BSR "DARTH HELMET (tm)"
Marcos Ambrose & SBR, 2003 & 2004 V8SUPERCAR Champions
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.