Post by jlawless on Oct 1, 2009 23:11:48 GMT -7
So, after talking to Maryland Speed and HHP I've come to the conclusion that
A) Stepped headers aren't as good as Straight 1' 7/8th's
B) Jet 2000 Degree is NOT as good as PM-FL 1700 degree or Jet 1700 degree.
Now, to explain why.
A) "As for TQ..you will have more TQ with a straight header that is properly sized for your application (ie 1 7/8"), than one that steps to a size that is too big (stepped are 1 7/8" to 2"). You want the smallest header that can efficiantly flow the maximum exhaust output of the engine so exhaust velocity stays high. 1 7/8" straight supports up to 550 RWHP."
"As for the stepped headers...honestly it is on the big side for a stock motor..so you do risk loosing a little low end TQ. It is kinda like buying a shirt a size too big thinking your gonna work out next year. I would say you would need at least 550rwhp before it out performs a straight 1 7/8" header. So unless your building some monster..a 1 7/8" header would be fine."
B) "One common misconception is that a higher temp rating means the coating insulates better. This is not true. Jet Hot 2000 degree coating lasts to 2000 degrees, but it insulates less than their 1700 degree coating. This is explained on Jet Hot's webstite here-
www.jet-hot.com/headercoatings.html "
"Although it can withstand higher temperatures than the STERLING and EXTREME STERLING, it is not as good of an insulator at lower temps. For example, if your exhaust gas temps are running at 1,300ºF, the EXTREME STERLING will reduce the skin temperatures on your pipes more than the JET-HOT 2000. "
I'm thinking I'll go Kooks 1" 7/8th's Straight longtubes with PM-FL 1700 degree. Cause according to Maryland Speed Jet has closed some plants so the coating time is 3 weeks longer with them and I won't lose anything by going with the PM-FL coating.
Any thoughts/counter arguments? Taking any and all comments, suggestions, anything before I order.
A) Stepped headers aren't as good as Straight 1' 7/8th's
B) Jet 2000 Degree is NOT as good as PM-FL 1700 degree or Jet 1700 degree.
Now, to explain why.
A) "As for TQ..you will have more TQ with a straight header that is properly sized for your application (ie 1 7/8"), than one that steps to a size that is too big (stepped are 1 7/8" to 2"). You want the smallest header that can efficiantly flow the maximum exhaust output of the engine so exhaust velocity stays high. 1 7/8" straight supports up to 550 RWHP."
"As for the stepped headers...honestly it is on the big side for a stock motor..so you do risk loosing a little low end TQ. It is kinda like buying a shirt a size too big thinking your gonna work out next year. I would say you would need at least 550rwhp before it out performs a straight 1 7/8" header. So unless your building some monster..a 1 7/8" header would be fine."
B) "One common misconception is that a higher temp rating means the coating insulates better. This is not true. Jet Hot 2000 degree coating lasts to 2000 degrees, but it insulates less than their 1700 degree coating. This is explained on Jet Hot's webstite here-
www.jet-hot.com/headercoatings.html "
"Although it can withstand higher temperatures than the STERLING and EXTREME STERLING, it is not as good of an insulator at lower temps. For example, if your exhaust gas temps are running at 1,300ºF, the EXTREME STERLING will reduce the skin temperatures on your pipes more than the JET-HOT 2000. "
I'm thinking I'll go Kooks 1" 7/8th's Straight longtubes with PM-FL 1700 degree. Cause according to Maryland Speed Jet has closed some plants so the coating time is 3 weeks longer with them and I won't lose anything by going with the PM-FL coating.
Any thoughts/counter arguments? Taking any and all comments, suggestions, anything before I order.
You alone are gonna bring this country out of recession with the $ you are putting into her! LOL -Pogo