Car looks good, but yes 307 is ridiculously low!!!

Who tuned the car and what management??? Alot of power is on the table in the tune! Also I dont see how a slightly higher compression would affect the boost level, but i could be wrong.

I say..... go dyno on some other dyno's that are notorious for reading high... and get an average of a few dyno's. This is what motivated me to dyno at kraftwerks.... I couldnt sleep at night if I was lower than 360!

Im still VERY unconvinced headwork does any good! who cares if it tests better on a flow bench if it doesnt translate into hp on the dyno!!! gains are most likely minimal at best and only seen in the very high rpm's which the rotrex doesnt allow you to see!!!

The higher compression may make tuning more critical to get PERFECT... I was advised not to go to 12:1 and just be content with 11:1.... the extra compression is virtually meaningless on a boosted application where boost can be increased!!! In this case where boost cannot really be increased it was a viable option so Im glad you tried it!!!! I just think the very small benefit of MAYBE a couple horsepower isnt worth the decreased longevity of the motor!!!!


keep us updated... (Looks sick!!

 

Yah I had my greddy kit tuned at the same place.... 12 psi, water meth, ported WG, 3" DP back and it only yielded me around 240 whp.. That was dissapointing but it runs good... It is definaltely the dyno reading very low... A stock s2000 apparently reads at about 165 whp on that dyno so the delta is pretty good. Etleast your lines are somewhat linear.. my torque just falls on its face at like 5500 rpm

 

IME it's very rare that the dyno is the issue, especially when your short by 60-80hp. I would blame it on the injection system before anything. Do you have a fully tuned run w/o injection? I assume you don't since you didnt mention it in your post.

Your boost curve is much different than that of a turbo. The linear nature of the KW charger won't require injection until after about 7+psi for effectiveness. If your injection kit is activated by RPM, try having it switch on at 7k. If it's activated by pressure ajust it to have it turn on a 7psi. If the injection is coming on too early, it can/will bog the top end.

Other possibilities to consider:
-What management?
-Nozzle size: may be too large
-Pump Pressure: may be too high
-Mixture: try 2:1 Meth/Water or Alcohol/Water

 

Well guys its comfirmed that Lookinco was running the 100mm pulley on his ap1 thats why he was getting 13psi. He blew his blower very recently.

Edit* He bought an ap2 kit so it wasnt OJR's fault.

 

so how did he find out the blower was blowing fluid into the motor???? Is the motor shot?, the blower shot?.... what were the first symptoms???

 

well hes not the first to grenade a KW blower on 13psi. sucks that the blower is right near its peak efficiency, and max tolerance @ 10psi

they need to offer a C38 upgrade!

 

lol getting worried about your setup man?
you should pm him

 

From what I understand most of the guys running a 90mm blower pulley (like DesertWanderer i.e. who's been doing it for months) are shifting at about the same

 

Basically it just happened suddenly. The car was not being driving hard when it all happened. However prior to that we were tuning the high rpm (no boost) portion so we kept it at pretty high rpm for a short period (around 7k to 8.5k rpm). A few minutes after tuning on the way back to the shop we heard this loud sqeeek, then we found the charger not boosting properly.

Once we got to the shop we found that the Rotrex Oil Resvervior was low on oil. White smokes was also blowing out the tail pipe. We removed the charge pipe and found rotrex oil in it, which means the charger is blowing oil into the engine.

We believe the motor is fine as only a small amount of oil got into the engine. We ran the engine NA and all seems fine. The blower is definitely shot, but I will take a closer look later to see if it will be rebuild or repairable.

 

I am tempted to make the C38 fit, but I do not want any down time for my car so I already ordered the C30. However I have asked my engineer friend to make a CAD drawing of the existing charger bracket so I could use it as a start for the C38 bracket.

I have a spare engine lying around so I could use it to test fit the C38 and bracket. After that I got to figure out all the piping but that doesn't seem to be too much of an issue. There should also be more then enough space to fit the C38.

Maybe we will need a bigger intercooler? But seeing how efficient the Rotrex are, we might not need one.