For all those supercharged, where have you installed your boost gauge. I want to keep the factory look so I'll be using the sport chrono pod for mine. I don't have the chrono option so, I'll just buy a chrono pod and try to make it work. Does the dash have the cutout lines for the sport chrono already? Has anyone done this Before? I need some help before I start cutting my dashboard. What boost gauge do guys you have or recommend?

 

You don't need one since boost is consistant based on engine speed.

 

Wrong- The boost increases with RPM until it maxes out at 5-6 PSI dependig on the engine model. The SC has a fixed bladed impeller. (The system does not employ a "waste gate" but a max 5-6 PSI at max RPM design)

Think of it like a boat with a jet drive. The higher the RPM the more thrust generated.

Ok, I re-read what you said. Boost is constant at a stable RPM. That is correct if that is what you are saying. However, boost increases as RPM increases. A boost guage would show how much boost was being generated at the different RPMs. The 5-6 PSI is only generated near engine redline.

The V2 SC has an operational capability of generating approximately 20 PSI. It just has to be spun much faster to get that pressure. To do so you either put a smaller pulley on the SC thus increasing the speed at which it spins at a given RPM, (curently being tested by VF-Engineering), or put it on an engine that can spin at very high RPMs well above our cars engine capabilities.

Make sense?

 

First of all, you said nothing different that I did except you used more words. The boost is set at a constant for each rpm. There is no practicle need for a gauge as you can not overboost the engine as you can a turbo.

Secondly, you will never get even half of the 20 psi the V2 is rated at into the engine. For every twist and turn and added length of plumbing there is, you lose pressure. The V2 has a maximum rpm speed of approximately 50,000. In the case of the system discussed, approximately 50% of the loss is due to the plumbing.

 

I love it when newer members go toe to toe with 99. It's like accidentally picking a fight with Mike Tyson 99 really does know his stuff.

With that being said, I have a boost gauge in my car. I am using the zeitronix unit. It measures boost, afr, egt, lamba, and it datalogs. The only reason I am using it is to catch any potential problems. If I feel like there is a power loss for some reason I can check the boost and confirm my suspicions. The boost is generally constant at 5ish psi.

 

Deputy, could you grace us with pics, please?

 

You can see the unit mounted just above the storage pocket in front of the shifter.

 

99-
There certainly can be a practical need.
It can be used to verify the SC is working correctly. (IE- The belt is not slipping and the correct PSI is being devolved.)
Also, you could verify a failure of the blow off valve.

Seems Deputy uses one to catch potential problems. I would thay that also be a practical need.

 

Or you can simply hear/feel that the boost is leaking or the belt is slipping. If the car had a blowoff valve, you would here that too. But, since it doesn't, you would have to easily feel and hear the bypass valve not operating properly.

It's all personal preference, I guess.

I suspect that Dog is more interested in the other sensors he installed rather than his consistant and predictable boost pressure.

 

99 likes the old school way, eyes & ears do the work.

Hey Mark, let us know when you get your car back. Maybe we can meet in O.C to see your new toy.

 

no problem daytrader.

 

No doubt personal preference but I would not say “no practical need”. I guess you would say the same about the TPMS although it identified a very small leak on my left rear and when the tire lost around 2 PSI, I received a warning. I looked closely and found a very small nail in it. I would not have known about this problem until days later when I could visually tell by looking at the tire.
For me, I like to know what all the systems in my car are doing and if there is a problem I would like to know early. The part about hearing the belt slipping or hearing a boost leak or the hearing a bypass valve issue is not very scientific but may work for you. I have a cab, would I be able to hear these over my PSE and with the top down? Would I be able to hear slight belt slipping due to a SC bearing going bad? A boost gauge would identify a potential problem early and actually allows simple monitoring of system operation.
For me, a former F14 pilot and current airline captain, I want and like these systems monitored. I would actually like to have a liquid temp gauge with inputs connected just prior to the intercooler and just after. (Just like we have in airplanes checking the cooling of the constant speed drive)
How do you know when the intercooler pump is not working? I actually had that problem. Sure there are ways to figure it out but with a temp gauge you can compare the delta between the two temps and know immediately there is an issue.
My point is in these cars the other systems are monitored by the computer and many shown on cockpit gauges. Had this equipment been original Porsche equipment you better believe there would be monitoring and a boost gauge. Our SC and intercooler however is NOT monitored and I for one think it is practical to install certain gauges to allow one to monitor performance precisely and not by possibly or possibly not, hearing something.

 

An extra water temp gauge would be good for the self contained water/air intercooler system, it would let you know if the system were leaking or low on coolant or if you would need to change the fluid. How hot would the charge get if you broke a coolant line or your water pump goes bad?

 

Very nice and tidy, Deputy! I want that monitoring system in my car. How much would it cost to purchase the hardware and how difficult/time consuming is the install?

 

I think the equipment and sensors were around $400. I paid someone to do the install. They said it wasn't that hard.

It is nice being able to keep an eye on the AF ratio too. Although it's probably not necessary (knock on wood) as it stays about as rock steady as the boost pressure.

EVO did a good job putting this kit together.