Any Updates On The "Revised" S&S Headers?
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Well the first step in done...I have my dyno numbers for my basline. Here's the thread I posted about it: https://www.clublexus.com/forums/sho...8&goto=newpost
. Anyway my numbers are 248 rwhp and 253 torque. Next week the plan is for me to install the headers and do another dyno run. I'll post the results once that is completed. Stay tuned.
. Anyway my numbers are 248 rwhp and 253 torque. Next week the plan is for me to install the headers and do another dyno run. I'll post the results once that is completed. Stay tuned.
Here is a consideration that all should keep in mind. The camshafts on these engines are VERY mild. This limits peak power regardless of modifications. I cannot see any more than 35rwhp more with really any bolt ons IF that. That would be 283rwhp! Possibly with some actual port and valve job optimization. So, regardless of intake or headers there is a limit to the peak output these cams will support. That said look to mid range torque as a good indication of improvement in both performance and that all important FEEL.
Also, if you could dyno with just headers and then intake that would be good info. Does the Akimoto require an ECU mod?
Keep us all posted.
Well, those are very good baseline numbers. I am uncertain if yours is just an unusually strong factory car or the dyno is optimistic.
Here is a consideration that all should keep in mind. The camshafts on these engines are VERY mild. This limits peak power regardless of modifications. I cannot see any more than 35rwhp more with really any bolt ons IF that. That would be 283rwhp! Possibly with some actual port and valve job optimization. So, regardless of intake or headers there is a limit to the peak output these cams will support. That said look to mid range torque as a good indication of improvement in both performance and that all important FEEL.
Also, if you could dyno with just headers and then intake that would be good info. Does the Akimoto require an ECU mod?
Keep us all posted.
Here is a consideration that all should keep in mind. The camshafts on these engines are VERY mild. This limits peak power regardless of modifications. I cannot see any more than 35rwhp more with really any bolt ons IF that. That would be 283rwhp! Possibly with some actual port and valve job optimization. So, regardless of intake or headers there is a limit to the peak output these cams will support. That said look to mid range torque as a good indication of improvement in both performance and that all important FEEL.
Also, if you could dyno with just headers and then intake that would be good info. Does the Akimoto require an ECU mod?
Keep us all posted.
I'm keeping my expectations realistic for the header numbers. I'm aware that it's not going to be anything major like 35+hp; I'm hoping for something from 15 - 24 increase. I had headers on my other cars before so I know what to expect as far as the feel in released hp. The days are counting down.
Pole Position
Joined: Jun 2006
Posts: 313
Likes: 7
From: Georgia
well i am considering installing an exhaust, SRT intake w/ ECU, and headers. I would like to know the total WHP gain when all is said and done, so keep us posted. Also, Is the SRT intake combo worth it? I keep hearing mixed stories.
also, people say they feel most of there gains on the top end, but then again there are some that claim no performance gains and for the price SRT goes for 
people might go with other intakes.
Last edited by GS FONZy; Sep 23, 2007 at 12:57 AM.
Got my headers installed yesterday. I can say that I can feel the difference from off the bat. Granted, it's not a throw your head back mod, but you can feel the additional performance. I will dyno the car later this week. Oh, yet, the hardware that comes with the kit is not going to work at all.
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