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409 or 304 headers?

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Old Nov 22, 2011 | 11:42 AM
  #21  
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Alright, so I got the dyno. Looking at it though, it looks like I had them pull to 7k and then they let off. Knowing that, and looking over my reciepts, this dyno was done before the intake and Cobb access port, but with the hfc's.

Guess I'm going to have to get it dynoed again to figure out what's going on. Well, that and dynoed on a dynojet. I'll probably just get it done again when the headers are on.

Looks like this shop uses a superflow dyno. In case you're wondering why I went there, they are two blocks down from my house and I just wanted to see what they had.
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Old Nov 29, 2011 | 01:09 PM
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So I had a dyno done today at AAM where I had my baseline done. I didn't get torque numbers, they said there was something wrong with the lead so I only got hp.

When I took it to them stock I was pushing 261hp. With the mods listed above I'm around 280whp, 279.76 to be exact.

They told me I'm running lean though. At the AFR's lowest point it's at 13.23. I guess I'll need to get that fixed. What AFR is it supposed to be at? I saw one post where they said for NA it should be around 12.5. I just want to make sure that's correct.

Oh, and Rubidium is right. I should be shifting waaaaaay lower than what I was. I'll try that next time.

Thanks!

Last edited by NightShade; Nov 29, 2011 at 01:11 PM.
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Old Nov 29, 2011 | 02:17 PM
  #23  
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^ Magic dyno that can measure hp without torque?
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Old Nov 29, 2011 | 03:31 PM
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Originally Posted by DaveJackson
^ Magic dyno that can measure hp without torque?
lol, I don't know what happened man. It shows a speed vs. hp graph. I guess they couldn't pull rpm from the engine or something?
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Old Nov 29, 2011 | 05:01 PM
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I've almost worked up the nerve to buy the FI headers for my HR....the 95% fitment refers to the fact that you have to take a rubber mallet to the underbody of the car, lol.
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Old Nov 29, 2011 | 06:10 PM
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Originally Posted by doshoru
I've almost worked up the nerve to buy the FI headers for my HR....the 95% fitment refers to the fact that you have to take a rubber mallet to the underbody of the car, lol.
Yeah I saw that, that plus the $1500 price tag and I decided to just go with the Stillen headers.
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Old Nov 29, 2011 | 09:36 PM
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Originally Posted by NightShade
Yeah I saw that, that plus the $1500 price tag and I decided to just go with the Stillen headers.
Why would you buy the FI new? there are plenty of used sets on that 370z site for sale.

the 13.23 isn't super great but not terrible. 12.75 would be good but a 13 is just fine.
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