The New Headers Thread

[SappySE107]

What size injectors are you running right now? I wouldn't be surprised if you need larger injectors or a pressure increase with the headers now.

[OldSkoolGP]

I have L67 (36 lb/hr) injectors and I'm currently running 55 psi at the rail.

[IsaacHayes]

Hmm. Nice! Hard to see whats going on as I don't own a DOHC from the pics. But sounds like they'll make a big improvement!

[OldSkoolGP]

Went to the track yesterday, pulled off a 14.27 (new PB) with a rough tune and street tires that no longer hook up on the launch. Here's a video I made today of the car, just a brief walkaround explaining everything that's been done.

http://www.netphetamine.com/joshherrell/walkaround.wmv

[SappySE107]

Yup, its loud and it doesn't wanna stay running:P Thats a huge exhaust setup now.

[dohcfiend]

nice run!!!!

To say you have long tube headers is a HUGE understatement. DAYUM!

Just a guess but based off what you have commented, you may be overfueling your engine. Be careful not to wash out your cylinders.

lean that puppy out on the idle some and maybe try going back to the stock MAF to see what you get.

just some suggestions. hard to tell without being there, looks like you have a code too. good place to start.

[OldSkoolGP]

The code is for an HO2S error. My narrowband O2 sensor isn't working at the monet, I have to try and fix that this week. It hasn't been a huge issue since all the tuning I've been doing has been with the Wideband O2. I think I'll have to go back to VE (MAF unplugged) tuning to get the idle dialed in, that worked last year. The big thing I've been trying to dial in is the MAF tuning so get the right numbers in the computer for airflow vs. Hz at rhe sensor. my WOT tuning is pretty dead nuts on 13.0:1 across the board +- .1 in somme of the cells. But with no NB O2 I have no fuel trim learning so the car is running off of MAF numbers only. I can't make the car idle with the correct MAF numbers in there because it just idles at 2000+ RPM, so I am having to use much lower than actual numbers to make it idle some what reasonably, but that only works with a warm engine. I'll get it sorted out this week.

[dohcfiend]

i have a question about your run.

how fast were you going?

[OldSkoolGP]

I believe 96.7 MPH.

[dohcfiend]

nice, last question.

did you hold it in 3rd or shift into 4th?