hey guys, im getting ready to order some gauges and im hoping you can tell me what to expect.

im planning on a mechanical boost which should be simple. wheres the best location to read the boost pressure from? can i simply put a T in the line that operates the FMU?

as for the air/fuel, how do they hook up? can you splice into the one of the stock O2 sensors? or is this gauge going to be a more involved process than i originally thought?

thanks for any imput.

sorry it this is a stupid thread...

 

Don't worry man... no question/thread is stupid. Not sure about the A/F but I hooked my Boost to the pass side vac. port. Just put a tee in like you said. Just not sure where your FMU is . Mine was on the drivers side. I didn't want to mess with that. Hope this helps a little.

 

you hook the a/f gauge to the purple wire on the O2 sensor.
You can use one of the hard plastic manifold lines that is by the pcm for your boost gauge also.

 

I connected my FMU to the same vacuum port that operates the stock mechanical fuel pressure regulator and I connected the boost gauge to the other vacuum port adjactent to the one I used for the FMU. I think it was for the EGR valve. Either port should work fine. I just didn't want to have all the T's on one port.

 

A/F gauges are very inaccurate, more "eye candy" than functional. I would recommend you get a fuel pressure gauge instead...very helpful when diagnosing problems and and piece of mind that your fuel system is up to the job of supplying fuel, especially with a FMU (high pressures under boost).

 

what kind of fuel pressure are you seeing under boost obe1? <----i feel like luke when i write that....

 

When I was running an FMU, I saw 80 psi at 6# of boost. I've converted to bigger injectors and dumped the FMU, but still see 60 psi at 10# of boost. If you're still running the stock Lucas injectors, they don't like high pressures and can lock up; SVO style injectors are good for 100 psi without locking up.

 

would i have to retune my pcm or could i get an adjustible regulator instead. i dont have the capability to tune myself and i dont want to dyno the car and send the pcm off every time i change something like this.

yeah im still running the stock injectors.

thanks guys.

 

A blown car should be tuned by a professional to make safe power; it's money that's well spent. Larger injectors will require a change to your programming. You can replace the stock 24# Lucas injectors with SVO 24# injectors without a programming change and still run your FMU. This is a cheaper route but I'd advise getting some 42# SVO injectors, dump the FMU and get a custom dyno tune.

 

so far, the best tune i can get living here is dynoing the car and then sending the pcm with the dyno graph to ion (madz28.com).

i have not found anyone within 2 hours of me who can tune my car....

where is the best bet to find the 24#+ SVO injectors?