Jack Riffle

Hacker,what a coincidence, I was planning to add a supercharger on my 81. It seems you and are doing the same thing, only in reverse. The stock numbers were 184.9 HP and 205.5 torque. Only reached 163 MPH on that run. This one was 175.27. I am not sure what kind of Dyno it was, but I will find out. Both stock and "tweeked" runs were on the same dyno. I will dyno again in a week or 2 after I install the 4-speed auto, just for kicks.

checkmate1996

4) I have the cams
6) I have the Euro S throttle body

hacker-pschorr

My 81 put down 160rwhp on a Dynojet - same day as a few others that fell within the "proper" range so we know it was not an issue with the dyno. I still have no idea why my car is / was so down on power. The only smoking gun was two spark plugs that looked oil fouled - went away after I replaced the valve guides / seals. I never went back to do another base line run after fixing the heads.

We'll find out tonight - first supercharged dyno my air / fuel was way off - to the point of being dangerous. That problem is solved (actually running very rich at the moment) so tonight dyno @ 7psi with an intercooler should be much better.

What blower setup are you looking at?

Jack Riffle

Hank, I am so sorry for hijacking your thread, that wasn't my intention. Hacker, my air/fuel ratio looked like a straight line all the way thru all dyno runs, between 13-14 at all times. Never went leaner than 13.7 and never richer than 13. I love my L-Jet! I have spoken to Tim Murphy, Carl Fausett and Dave Roberts. That twin screw of DR's looks very sweet to me. DAVE, are you listening? HURRY UP! Since my car is an auto, the twin screw makes the most sense, but I am starting to get a little impatient and may go with Tim's setup. I will be VERY interested in learning how your car does on the dyno. Would you mind PM ing me the results.

Imo000

Is that 7psi at the SC or at the intake manifold?

hacker-pschorr

Any setup by Tim or Carl is measuring boost via the intake manifold - after the intercooler.

I drilled / tapped the openeing on the front of my plenum normally used by the automatic trans vacuum line. Since my caris a 5-speed, this was an easy add-on. After looking at Carl's setup, he does the same thing.

I'm not 100% sure where Tim plugs in his gauge.

Why would anyone measure boost off the blower? I'm assuming you mean the pipe directly after the supercharger vs the intake.

EDIT - I just realized my avatar pic is the "original" setup before I added the vacuum port to the plenum. First time around I added a T to the vacuum port on the TB used by the factory regulators. I found out right away this spot does not move enough vacuum for the FMU, boost gauge or BOV. My BOV was opening very slow when going closed throttle.

Imo000

Believe it or not, there are people out there that hook up the boost gage at the SC. It gives false reading, and that's why I wanted to know how yours was set up. I was just wondering if you are keeping the same SC pulley or reducing it to compensate for the pressure loss of the intercooler.