Header Collecter Extensions

J Kuchel · 09-28-2008, 08:40 PM

Just wondering when using a collecter extension like a 12" or 18" how much difference on HP. & TQ.? I have a 9.5 to 1 comp. 502 BB dualplane intake, 2" primary headers and 3.5" collecter. It made 621 tq. @ 4500 and 621 hp. @ 6100. The car weighs 3200 lbs w/driver and has a 4:10 gear and turbo 400 trans. It has run 10.07 @ 131.65 mph. If I use one will it make more tq and hp? It has merge collecters on the headers. Also I run a small tire 29.5/11.5-15.

09-28-2008, 08:40 PM	#1
J Kuchel Banned Join Date: Apr 2005 Location: Sterling,Illinois Posts: 111 Likes: 0 Liked 0 Times in 0 Posts	Header Collecter Extensions Just wondering when using a collecter extension like a 12" or 18" how much difference on HP. & TQ.? I have a 9.5 to 1 comp. 502 BB dualplane intake, 2" primary headers and 3.5" collecter. It made 621 tq. @ 4500 and 621 hp. @ 6100. The car weighs 3200 lbs w/driver and has a 4:10 gear and turbo 400 trans. It has run 10.07 @ 131.65 mph. If I use one will it make more tq and hp? It has merge collecters on the headers. Also I run a small tire 29.5/11.5-15. Last edited by J Kuchel; 09-28-2008 at 08:43 PM.