I do think the blower makes more noise..probably because I am spinning it at max and it IS bigger. I had already put the thicker top cap on (with reinforcing bars inside) before the 2.8 was installed. That said my car is really loud...start it up in the garage and the dishes rattle in the cupboards in the kitchen.....but that is just the way I like it!LOL yes it does sing a strange song for sure here is a qoute from sig at the corral forums "The sound is unnatural and not of this world, like a screeching velociraptor with the flames of hell licking it's ass"
Any chance you guys can remember if the 2.8L was harder to control the sound than with the 2.2 you had before. I know my 2.1 no matter how fast I spun it never made the sound or vibration. The 2.8L sound and vibration is most prevelent around idle and at cruise speed and just above it levels off some and at part throttle sometimes it goes away. Are the gears different in the 2.8 I was thinking it could be rear noise.
Obviously your set up is different than ours, so its hard to give you definitive answers to your particular issues. Your inlet manifold is much bigger from a sq/in standpoint and your outlet piping is also much different as well. All I can suggest is thicker material, and/or internal/external bracing of the larger sq/in pieces so that they do not vibrate or resonate from the pressure waves from the supercharger. It is all kind of a trial and error thing, as you well know at this point. Good luck. I check over on the Corral from time to time to look for updates to your build. It will be a beast when you are done.Very nice work guys that is a huge increase in both T/B and I/C. Great work and I'm sure you will get more power. I'm still still working on my car almost done with the head regasket and this time I used the Fel Pro MLS SD4 severe duty gasket also I sold my large sheet metal end tanked Procharge intercooler and will be trying a horizontal flow 31x12x4 with smaller cast end tanks to reduce the noise. By the way I tried using a very heavey duty audio sound deadener called Fatmat on the sheetmetal end tanks of the Procharger intcooler and it still vibrated and made losts of noise.
More pics of the modifications to the inlet manifold for the larger throttle body. Obviously more fab work yet to be done.
This has been a mind bender for some time and I can't quite talk myself into into if this will work and not create and unmetered air issue. The reason behind moving the bypass location would be to circulate from the cool side of the system staving off the KB heat monster. Look at the picture in scenario one this is how I currently have my bypass setup where the outlet is on the hot side and directs hot air back to the inlet. This circulation is before the meter which I'm not sure maters on a KB closed system???
Scenario two below is how I would like to run my byass with the outlet from the cool side circulating back to the inlet. I believe that even though the air is already metered it is still withing the vac loop which is all forward of throttle body and is not lost. Does this seem to make sense or am I seeing this wrong.
Our first chance to test the new components will be the weekend of the 27th of July. The T-body and intercooler should be done by next week and we are going to be spending next weekend installing a "chute' to the car as we are sure to pass the 150 mph zone with the new upgrades. As always traction permitting given the small tire we run.nice work! any progress is new throttle body on yet car is amazing! squeezing everything you can out of that KB setup cant wait to see what ETs and MPH result good luck!
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