Sondra S2K

I am trying to ascertain the amount of potential flow restriction from the HKS HiPer. I had a test mule set to go, but it has developed some problems that rendered it undriveable so I'm hoping that someone here might have already done this and might have the answer. I'm not looking for butt dyno opinions; I'm looking for actual dyno results before and after install, preferably on an AP1.

Thank you in advance!

f23power

ahhh...yet another HKS- HiPower exhaust thread. I have YET to see a before install and after install dyno of a s2000 with the HKS exhaust. most people on the boards here swear they have absolutley no gains and sometimes even losing power..hence the nickname.."HKS No-Power". but this exhaust is typically purchased for its exhaust note...

-a

Skatethesea

I have a 2.5" HKS Hi Power catback and I didnt Dyno it, but I do know that i cant feel a darn thing extra. But like F23 said, I bought it for the noise! Oh and what a rumble it makes! HKS FTW

jdmfool

me to ! bought it for the noise! its hard to get any hp out of any bolt on mod for our cars without handing over and arm or leg =o( anyways

HKS FTW +1

chuhsi

hks + test pipe or hi-flow cat

Sondra S2K

Thanks for the feedback, but I really need real world figures. I'm not getting the gains out of my supercharger that I should be and am trying to decide if the exhaust is the restriction in the system or if I need to be looking at other things.

iDomN8U

FI section will have indepth info to help you

Skatethesea

There was recently a group buy on custom 3" hi flow exhausts. This would be great for you if you are FI. NA would only get too much back pressure from it. If you are still on stock exhaust, i believe it would def hurt your gains from going FI. Make sure once you get your (not sure what your doing all in all) test pipe, cat back, and what nots installed that you get it retuned. Your numbers should go up. But do go to the FI forum. They are a great help. Way more than i can be

CourageOO7

I run an HKS exhaust and I'm FI'd and running ~10psi. The test pipe made a difference

jdmfool

what kind of numbers are you pushing?