That is excatly what i think is apening. That 3" single must have to much flow. How many hp you think you got coolguy ??

I know i had 297 whp running lean and loosing 1 psi after 8k. Im pretty sure i was aming for ~ 310whp. That would be ~ 30whp more then CT spec.

Probably with the cat i will loose enought for the fuel to keep up

 

There is no way to effectively add injector duty without some form of engine management, also when you do on stock injectors which are already screaming from higher then nominal pressure, adding injector duty on top of it makes them rebel, not delivering consistent performance, so naturally if you have an EMS of sorts to add duty, you would want to go ahead and get larger after market injectors. You my friend are at the limit of what your system can support, let’s hope the cat does enough.

 

That is excatly what i think is apening. That 3" single must have to much flow. How many hp you think you got coolguy ??

I know i had 297 whp running lean and loosing 1 psi after 8k. Im pretty sure i was aming for ~ 310whp. That would be ~ 30whp more then CT spec.

Probably with the cat i will loose enought for the fuel to keep up
[/quote]

Makes sense, the stock injectors I have found cap off right about 300whp Dynojet give or take a few. When you consider thats 100whp over stock, thats pretty darn good for 360cc injectors. They are screaming.

 

I made 296 HP on a Mustang Dyno. I'm probably flirting with that line myself, but having the OEM catback exhaust must be helping me stay on the slightly more friendly side of the line.

 

You maybe suffering from voltage drop on the fuel pump thus it can't supply enough juice - if the car is old then even more so (IIRC the wires are quite thin), i had a similar issues (running lean) I ran wires with a relay from the battery to the fuel pump and it solved my issues, if your not getting enough juice it wont be able to cope and deliver enough fuel.

I ran about 100psi at idle for around 6 months until i decided it was stupid and got 650cc injectors.

You can measure voltage at the battery and fuel pump they should more or less tally up.

 

Wiring and relay are done body !!

;-)

If you ran 100psi at idle what was the 9k pressure 130 ????

How long have you run like this ??

 

Yeah I was when I heard that as well.

 

Shit sorry not 100PSI at idle LOL.

 

So !!!

This heavy mf cat is back on the car

Did some runs tonight on the highway and i ended up having the fuel pressure set pretty high ~ 68 psi at idle.

The afr were obviously pretty rich at low rpm , peeked at ~13.1 at vtec and got leaner and leaner until 9k.

I would say 12.5 ~ 7k
12.2 - 8k
11.8 ~ 9k

I would say that im pretty max out with the rrfpr and the afr's are pretty good.
Sound like it will have to do for now.

What do you guys think ???

 

You mean got richer and richer.

Glad the cat worked enough. That is a pretty ideal afr in vtec to redline How rich under, 11.2 - 11.5?