Stock vs 123 Wheel HP (All-Motor) Dyno Graph

[CASTREX]

Hey, for anyone wondering how the Yaris long tube header looks....

Here you go! Richard just sent me the picture...

[whooppee777]

Originally Posted by CASTREX

Hey, for anyone wondering how the Yaris long tube header looks....

Here you go! Richard just sent me the picture...

i'm confused. this will replace the mid pipe as well? would there really be a difference in power between this and say...the weapon R header that i have?

[richardholdener]

Th header you have is a replacement for the stock header-it (like the stock exhaust manifold) is too short to provide any scavenging effect. It is the scavenging effect that improves power, not simply additional flow.Basically the header must be tuned for the application. It can either fit in place of the stock exhaust manifodl or be tuned to improve the power-but not both. The long-tube header does require a different mid pipe which will be sold with the header.

Originally Posted by whooppee777

i'm confused. this will replace the mid pipe as well? would there really be a difference in power between this and say...the weapon R header that i have?

[dallas]

Wow amazing gain for bolt on's, great work! What gear is the dyno run done in? I always thought that a tri Y header was better for scavenging and torque than a 4 into 1, yet this set up is impressive!


.

Originally Posted by richardholdener

Th header you have is a replacement for the stock header-it (like the stock exhaust manifold) is too short to provide any scavenging effect. It is the scavenging effect that improves power, not simply additional flow.Basically the header must be tuned for the application. It can either fit in place of the stock exhaust manifodl or be tuned to improve the power-but not both. The long-tube header does require a different mid pipe which will be sold with the header.

[dallas]

Sorry I just found your great explanation of header types on the other thread!

[whooppee777]

Originally Posted by richardholdener

The long-tube header does require a different mid pipe which will be sold with the header.

that answers my question. thanks