when I first got this car it only put out about 4psi. after I upgraded the old style engine management to the newest powercard pro it cured my stalling problem and my boost went up to 5-6psi. however, I think this may have been from jiggling around the crappy wiring job the previous owner did with the JR timing box and now I think it may have shorted out again.
Today I got in my car to drive it around and noticed im back to 3-4psi...
Im thinking its got to be that timing box. anyone confirm that or have any other ideas? does timing effect boost?

thanks

 

nevermind

 

As far as I know, timing doesn't effect boost. You may have a leak in your line.
See the below photo. I found out that my the rubber coupling hose on to my gauge was all cracked and I had major boost leak. My gauge wasn't vacuuming and I was never able to hit over 3PSI.

I replaced it and now it's vacuuming -12 to -15psi and boosting about 4.5-5psi.

Hope that helps.

 

wow

 

hmm. I ripped out all the cilicon hoses this guy had in there and replaced them with new black rubber. I will check the conections again while im installing my coolant rerout and cops. thanks for the idea!

 

make sure you have good hose clamps on the crossover tube, i "gained" 2 psi after i found out i could pull out the crossover tube with my hands because the clamps were garbage.

 

just a little humorus update.
aparently at 3000 ft I lose 3 lbs of boost on this thing.
I only figured this out after dismantling my SC and intake mani and all my hoses... stupid altitude.

 

TOO FUNNY!!!! I wasn't happy the boost my jrsc m45 made w/big boost kit. I checked connections, clamps, ect and averaved 6.5-7# (maybe a little more on a COLD damp day). Then I too relized altitude!!!! This was only 3 days ago that I too, figured this out.

It should ROCK when I go to the beach in a month or so.

Just an addition. I just had the car dyno'ed (nearest shop is at the base of the mountain). Low and behold I picked up an extra # of boost. The m45 kicked the car up to 172 hp (not bad for the lil blower I thought).

 

That's not bad power for the JRSC!