With no boost control or bleed off, that is about the boost you should be getting. I only get about 6 psi when I turn off my DSBC. If your stock boost control solenoid is still connected, then it may not be working correctly. I read this post the other day about other people having the same problem:

http://209.58.199.225/vbb/showthread.php?threadid=34828&highlight=solenoid

Also, the factory boost gauge is useless. I don't know why Mitsu even bothered putting them in the cars when a real boost gauge should have cost about the same or even less.

 

Thanks for the reply.

Perhaps I'm a bit confused. Since this is a second gen VR4 I assummed I would get a reading of somewhere around 12 psi as I thought this was the boost level on these cars. I could believe it if I was seeing 9-10 psi numbers but slightly less than 6 psi seems awfully low.
I get this reading with the boost controller off or on-although I have not yet setup the controller (I want to be sure I know what I working with)
Is this a function of installing the boost controller, as in the default boost level is about 6 psi until it is set higher by either the stock boost control solenoid or aftermarket controllers solenoid ?

I'm trying to be certain the reading is correct as I don't want to add 7-8 psi on top of the existing number if it is reading lower than actual.

I was aware that the factory gauge was not accurate, that is why I replaced it. I pointed out its behavior only to make clear that I had been getting full sweep readings on it if that might mean anything to someone reading the post.

Thanks again for the reply.

Chris
1994 VR4

 

Hey do you have picts? I was thinking about replacing all three gauges? How much did it cost and how did it turn out. Please give details on what you thought. Thanks

 

I need to take some pictures. I've been consumed of late trying to get the loose ends worked out (setting the levels on the gauges, the turbo timer, etc.).

I am quite pleased with the way it turned out. I replaced the main gauge cluster (speedo, tach and fuel) with the NR white face overlays. The water, oil and turbo gauges went in the factory locations and are Greddy white face 60mm peak hold gauges. The A/F and EGT are the same Greddy gauges in two Greddy 60mm pods on the drivers A-pillar.

Each gauge cost about $200 average (the temp was much less the A/F much more) I bought them a number of months ago as a group buy. I waited until I had accummulated all the parts (gauges, pods, boost controller, trigger switch and turbo timer) before the project was started.

The dash has to come out so your looking at quite a bit of work or the expense for someone else to do it. I mapped the whole thing out in great detail and had the shop that does my regular work do it. This shortened the time. Now I just have to work out the details.

I'll try to get some pictures when I get everything settled.

Someone posted pictures about 3 weeks ago showing virtually the exact same setup so you might try doing a search and seeing what you can find.

Chris
1994 VR4

 

So if I understand this correctly the following should be true:


The gauge and the HKS EVC IV boost controller both show the equivalent of 6 psi because the installation of the boost controller bypasses the stock boost solenoid resulting in the car's boost level going to the 6 psi default until I setup the boost level via the EVC IV (which has its own solenoid).

So I should now proceed to setting up the EVC IV based on the stock boost being nominally 6 psi (I’ll use the exact value). So if I follow the EVC IV’s instructions I would perform the learn mode (step 2) and then follow the boost pressure setting instructions (step 5 since the instructions tell me I can skip from the end of step 2 to step 5).

Comments?

Chris
1994 VR4

 

I don't know about the EVC, but I installed a Autometer boost gauge and I can only hit 6psi also. Thats in 3rd gear at WOT. My car is a 93 Stealth and I too was hoping to see around 7-9 psi. I ordered a MBC, so we'll see what happens after I get that on.


Chris