Fuel 1990 installing edelBrock intake

Beaker · Monday at 8:29 PM

Hey
I’m trying to install a edelBrock performer rpm 2 on my 1990. There are 3 threaded holes I’m lost on. 1 goes to pcv, 1 goes to firewall (I think ). And the last one, the instruction says tee off and go to fuel pressure regulator and map sensor. I can figure out the fuel but I’m lost on where this is
HELP

rednotch · Monday at 9:01 PM

Map or bap is the small black box on firewall, only gets vaccum on none mass air cars..

Beaker · Monday at 9:28 PM

Ok thanks. Kinda new to this. So if I have a maf sensor in my air intake, this means i have mass air and shouldn’t need vacuum?
Thanks

AeroCoupe · 2026-10-06T14:10:00-0500

That is correct. I will tell you that with a stock motor you will loose some bottom end power with the RPM II upper. I have this upper but its on a built 331 and it starts to build real power at about 3,000 rpm with my motor. Hopefully you got a good deal on it and are shooting to grow into the intake.

rednotch · 2026-10-06T14:57:01-0500

Beaker said:
Ok thanks. Kinda new to this. So if I have a maf sensor in my air intake, this means i have mass air and shouldn’t need vacuum?
Thanks

Yes on mass air cars its a BAP sensor and reads atmosphere pressure so no vaccum gets connected to it.

Beaker · 2026-10-06T15:54:01-0500

AeroCoupe said:
That is correct. I will tell you that with a stock motor you will loose some bottom end power with the RPM II upper. I have this upper but its on a built 331 and it starts to build real power at about 3,000 rpm with my motor. Hopefully you got a good deal on it and are shooting to grow into the intake.

AeroCoupe said:
That is correct. I will tell you that with a stock motor you will loose some bottom end power with the RPM II upper. I have this upper but it’s on a built 331 and it starts to build real power at about 3,000 rpm with my motor. Hopefully you got a good deal on it and are shooting to grow into the intake.beauty

rednotch said:

Yes on mass air cars it’s a BAP sensor and reads atmosphere pressure so no vaccum gets connect

Click to expand...

Beaker · 2026-10-06T15:55:25-0500

Beauty. Thanks. Yes it just got a fresh edelBrock intake and Florence heads with a Trickflow cam. Just waiting for throttle body. After that, I have a brand new vortech sitting on the flow waiting its turn

AeroCoupe · 2026-10-06T18:14:58-0500

Well well well…I see you were holding out on us. Now a build thread will be needed with lots of pictures please.

Noobz347 · 2026-10-06T22:39:40-0500

Beaker said:
I have a brand new vortech sitting on the flow waiting its turn

That should help.

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Fuel 1990 installing edelBrock intake

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