i dont wanna start a flame here, im here for information on how to solve my problem.

i wont list all mods, just the ones that should effect boost.

4lb
2.8 upper
WASP ported blower
power plenum
idler (prevents slippage)


so with that stuff, most people are seeing anywhere from 13-16 from what Iv read... well guess what Im seeing... 10-11lbs boost.

And in return, thats why I am not getting the power I was hoping for. I dont see any reason why Im not seeing 420hp, but instead... only 399....

a few people have told me its the port job is screwed up... could be the "style" because its not the proven Apten... or could just be a bad batch... so I have contacted Wes to see if there is anyway of eliminating that option... gonna see if he will switch me out another SC or maybe try and report this one or something....

but if that is not the problem.... what else can I look for that would cause low boost???

 

Didn't you just install long tubes??........there is 2lbs of your boost loss.

 

ya i did, but before the longtubes i was seeing about 10-11lbs also...

along with the LTs, i also installed the 2.8 upper, idler and plenum at same time....

 

Could it be that the long tubes offset the boost of the upper pulley??

 

ok, so lets forget the upper pulley,plenum and LTs... they offset each other...

but shouldnt a 4lb + ported blower get more than 10lbs boost???

 

I agree, are you reading your boost via the stock guage or an aftermarket gauge?

 

autometer Phantom boost gauge

 

I think you are in definite need of a re-tune, that should get you in the 400/500 club easily. But I think you have a problem with your boost, I agree that it should be much higher and can't quite understand why it is not.... and I don't think it has anything to do with the WES port job.

 

One last question, I see you have the idlers..........but is it possible that you still have slippage, was any slippage noticed?

 

Unbelievable........ .


Scott, you amaze me. Hang loose for a bit and give Wes a chance to get in touch with you.



I think I'll save some band width for Steve and Doug.

Everyone...this blower has not performed properly from the first day Scott got it back and put it on his truck. There is no need in all the usual questions about butterfly valves, belt slipping...bent gizmoes..or fuel filters.

The blower porting on this ONE blower is not doing the trick. We already know in advance that everyone elses was the best in the world and gave them 8 gabbillion H.P.



Rocks

 

well i think the blower is the only option now... there is not much left to throw out... im gonna wait and hear what Wes can do for me, i was just wondering of some other ideas to try and rule out while i wait....


i talked to JDM and they saw my dyno chart and basically told me my tune is just about perfect and there is no much they can do... so that rules out the tune.....


only other thing I can think of is the boost actuator... is there a way to "check" it to make sure its working properly?

 

Seems like you were stung by the bad porting job.

 

Even if the port job is not done correctly will that actually cause his supercharger to perform less than stock?? I would think not.

 

Did you not notice the clever pun?

If the bottom opening is not cut properly, the air pulses will become disharmonious and cause excess turbelence, which will stifle air flow and decrease boost. I'm not a supercharger expert, but I am an engineer and I did stay awake/sober through some of my fluid dynamics instruction. It's still conjecture on my part, however from my research and understanding, the shape and size of apeture re-porting is critical and has very little tolerance for error.

 

no I got the pun, but was really asking the question.
Hope he gets this figured out, because it would be driving me crazy!