Hi,

We briefly discussed here one single accident with VF SC car where cats got melted on a track and engine got wacked - I was just curious to ask other supercharger owners to see how many of you are here, what is your current opinion about this mod on your car, what is your current milage after this change, if you track your car or not and other overall feelings.

Please respond only if you DO have supercharger on your car, it would be greatly appreciated as it could keep thread clean on topic.

 

The VF system would not cause the problems you described.

 

If you do have SC on your car - you can perhaps comment on post #23 there.

https://www.6speedonline.com/forums/...toshoot-2.html

Again, it would be really great to avoid any baseless speculations regarding 'problems', plus I did not ask about 'problems', questions were different.

 

If you are referring to Blaktout's car, it was not the SC that caused the engine failure.

The biggest concern that most Porsche Tech's have with the SC, is that the block can't take the extra power. Other then that it is a pretty safe mod, it will make a lot more heat in the engine compartment. On the track the car makes a lot more heat then normal, in fact I was have cooling problems two weeks ago with my NA car on the track.

 

By making an unsubstantiated comment that the VF system was the cause of an engine failure, it is you who is making baseless speculations.

 

Well, I believe in statistics. Hopefully if amount of flame here will not scare folks away - may be somebody who has chargers will post their own experiences here. Again, I am just curious.

More heat in compartment asks for better ventilation. Perhaps second fan or an alternative? What happened to Blaktout`s car is not clear to anybody but, well, it is probably too late to guess about that anyway.

 

I have the first SC system installed on a 99 C2 and run higher boost than any 996 or 997 I have come across and have no problems. No additional heat in the engine compartnent, no timing pull, no oil burning, no problems at all. Close to 50,000 hard miles on my 99 3.4. Never even had the compressor rebuilt.

 

It is clear to Jared what happened, the SC that he had on his car is the one that Stacy (Justatoy) installed himself. When he sold it, he assured Stacy that the SC was not the source of the failure.

The flames coming out of the back could be a fuel/timing issue, or something unrelated to the SC. The mod seems to be very reliable, a number of 996 and 997 people have the units installed on there cars and haven't had a failure.

PM Deputydog, he has one on his 996 and has done a lot of testing and poking around the system, seems to know a lot about them.

 

I am the one who bought Jareds(blaktout) charger....it works flawlessly on my car...as I have said!
I do not track my car but do have some spirited drives now and then!
This IS the only engine failure with a charger I have heard of..not saying there might be more....just saying!
I asked this question to Jared RIGHT after this engine failure happened!
I believe,if memory serves me correct,Jared tracks his car and tracks it HARD....thus creating more heat in the motor....!
However,if it was the addition of some other part being used along with the charger that failed....then we cannot assume that it was JUST the charger that did this....
Whatever the part/parts that caused this failuer could of quite possibly failed with/without the charger!
The charger may have added some extra heat but surely the part(ie..cats) that actually did fail,may be the thing to blame,we will never know....but I use my car with confidence....that is all I can attest too!

Stacy

PS I was quite anxious for Jared to tear that failed motor down...but it never happened!
It would have been nice to isolate the EXACT cause,if they could!

 

Can't imagine why a SC would ever cause melted cats. Additional heat from the engine is no where near the normal operating temp of the cats. I would think the the engine would die from excessive heat well in advance of the cats being damaged. Yes ?

 

Jared and I talked offline about this since at the time we had comparable mods. It was not the SC. The high heat from the SC did cause the cats to fail but they were a new design and ended up being faulty. Normally not a big deal but they came apart and manage to get sucked back up into his engine.

Bottom line, they were a prototype cat that both Jared and I were guinea pigs for. When problems started to arise the distributer had no issues swapping them out for for some high quality HJS units.


Jason

 

I’ll bite.

I have a VF-Engineering SC on my car. It was installed at 11,500 miles and I now have just over 20,000 miles. I have not tracked it but do drive it pretty hard and fast. (Thus the need for a V1 and Laser interceptor Laser jammers both front and rear.)
For me I really like the mod. It transforms the car. The Torque is linear and just keeps building up to redline with max boost being achieved there. It is stealthy in that with the hood down you can’t see it and the turbine whine is pretty much non-existent. I say pretty much however sometimes in second gear with the top down and PSE off I can barely discern some whine.
I initially dynoed it with OEM headers and Fabspeed exhaust but changed both to X-51 and AWE cats and found that the HP increased 45 HP. Currently around 450 HP/327 ft lbs tq to the wheels. (Disclosure: Those numbers are on a 2- wheel dyno with the forward drive shaft removed. Autoscope now has a 4 wheel drive dyno in Dallas I will use to see what numbers it pulls normally.)
I currently have it on my lift in the garage and am going to swap out the 3.8 inch pulley for a 3.6 and see what the boost PSIG is as well as hp/tq increase. (I had a spirited debate about this with just a toy in another thread.) My plan is to stop at the 3.6 pulley since I really do not want to add more stress than the new pulley will create. These engines are already high compression enough.
The kit is well designed and support from Sean and Nik has be outstanding. The kit does what they say it will so no issues there.
I’ve had a couple of opportunities to do acceleration tests against a new M3 and easily walked away from him. (~40-120 MPH) That story would have been different un-blown.
At the same time I am getting pretty good gas mileage.
Here are the stats for the last 6- fill ups
-17.14 average MPG
-21.42 Maximum MPG (Trip to Houston from Dallas)
-14.66 Minimum MPG (raging around town)
Costs and other stats
-.16 Cents per mile average
-19.71 miles per day average
-6.16 miles per $ of gas
-246.33 miles per fill up
So overall I am very happy with the kit, performance as well as gas consumption.
What else?

 

Cats are designed for certain exhaust flow rates among other things. Adding a supercharger creates a much high exhaust flow as well as exhaust temperature. Stock cats would see their life shortened significantly being more restrictive and would get hotter than originally designed for. After market cats with less restriction would stay much cooler. Maybe someone with a EXH temp gauge can chime in with some actual numbers.



"Can't imagine why a SC would ever cause melted cats."

 

I better tell my stock CATS that they should have melted by now. They're only 11 years old.

 

An SC would not cause melted converter cores. What it will do is amplify any weakness in a part, which Im sure is the case here. 99% will do fine while a small percentage of parts may fail under the added stress.

If your running a blower you should be running an exhaust with high flow cats comporable to the ones us Turbo guys use.