Supercharger performance
#176
MM have you had your motor apart for any inspection? From what ive seen it ruines the whole set of steel housings. Id think a longer runner off the exaust ports would have a positive affect.
#177
Originally Posted by Moon Assad
The dip tends to streach the leanth of the port and isnt singled at 1 or 2 but everyone of the ports/ exaust.
#179
Banned
iTrader: (3)
Originally Posted by Moon Assad
MM have you had your motor apart for any inspection? From what ive seen it ruines the whole set of steel housings. Id think a longer runner off the exaust ports would have a positive affect.
#180
Would it be a good idea to kinda temper the housing at a higher temp then it will see and take care of the problem, For instance we tryed gutting the internals of the housings for a lighter display modle with a plasma cutter and caused it to temper so hard our bandsaw couldnt cut through it, OPPS. But it seems to cut like butter on a normal housing.
#181
Anyone care to do a little thermodynamic analysis??
When FI...at X lbs entering the system...heats up to X degrees...and then attempts to exit via outlets which can only exit X volume due to flow...then figure out how that 90 degree bend is inhibiting that flow and therefore absorbing/retaining some of it...then figure out the properties of the material the housing is made of to see IF or WHEN X lbs of boost creates temps which come close/exceed the rated property of the materials...
anyone else confused yet??
When FI...at X lbs entering the system...heats up to X degrees...and then attempts to exit via outlets which can only exit X volume due to flow...then figure out how that 90 degree bend is inhibiting that flow and therefore absorbing/retaining some of it...then figure out the properties of the material the housing is made of to see IF or WHEN X lbs of boost creates temps which come close/exceed the rated property of the materials...
anyone else confused yet??
#182
Originally Posted by MazdaManiac
These are failed engines?
It is likely that when the apex seal broke on these motors, its only path out was through the corner seal since there is no peripheral port through which to exit on the Renesis.
It is likely that when the apex seal broke on these motors, its only path out was through the corner seal since there is no peripheral port through which to exit on the Renesis.
It was from were and that caused the seal to fail. It even happened on the rotor side that would adventualy fail but didnt yet.
#183
Originally Posted by Moon Assad
The dip tends to streach the leanth of the port and isnt singled at 1 or 2 but everyone of the ports/ exaust.
I would imagine that the heat exiting that area will be higher than the other ports and therefore the issue would be seen in that area the most??
#184
Yeh, the only thing id be worried about with a high heat temper would be warpage. Ive played with tempering alittle, we did it on the spindals we built for the GT car. You get the metal to a certain temp then let it cool covered in sand, ive seen it done with oil and in the case of those housings I was chopping water did it.
#187
I dont think we are talking about show stopper issue...I'm thinking that moving the turbo to the "bling" position may help the situation...but I'm more inclined to believe that its root cause is going to be the additional heat slamming up against that 90 degree exit over time...which is simply a best guess...
I might actually do the math and then post it so I can get as flamed as those ports do haa...
To me if your going to race prep an engine and doing any FI...treating the housing might be a good idea for even more reasons than its just a good thing to do...
I might actually do the math and then post it so I can get as flamed as those ports do haa...
To me if your going to race prep an engine and doing any FI...treating the housing might be a good idea for even more reasons than its just a good thing to do...
#188
You know...as much as I love the engine...this side port buisness should have been handled differently...perhaps space the chambers from each other so that each rotor could be handled independantly...hell offset the rotors so you can conserve space but give yourself enough room to at least use a gentle curve instead of that horrible turn...
#190
Ive acually been thinking of puting a flapper valve in the center exaust ports to increase flow. I think if yo leave it kinda sloppy it wouldnt were out and let you use the whole port for flow. I dont have a turbo to worrie about trashing and you can pull the seporater insert if you pull the pin out after a disasembly. Dont worrie about getting flamed by me, only fat heads get that from me.
#191
Zoom-Freakin'-Zoom
iTrader: (5)
Originally Posted by Moon Assad
Ive acually been thinking of puting a flapper valve in the center exaust ports to increase flow. I think if yo leave it kinda sloppy it wouldnt were out and let you use the whole port for flow. I dont have a turbo to worrie about trashing and you can pull the seporater insert if you pull the pin out after a disasembly. Dont worrie about getting flamed by me, only fat heads get that from me.
to funny..
beers
![Beer](https://www.rx8club.com/images/smilies/beer.gif)
#192
Originally Posted by Brettus
Shame you didn't get more info on what the turbos / exhaust configuration was Moon . This could save a few of us a lot of $ if it could be diagnosed.
#193
Originally Posted by Brettus
Shame you didn't get more info on what the turbos / exhaust configuration was Moon . This could save a few of us a lot of $ if it could be diagnosed.
#194
Boosted Kiwi
iTrader: (2)
Originally Posted by Moon Assad
Ive acually been thinking of puting a flapper valve in the center exaust ports to increase flow. I think if yo leave it kinda sloppy it wouldnt were out and let you use the whole port for flow. I dont have a turbo to worrie about trashing and you can pull the seporater insert if you pull the pin out after a disasembly. Dont worrie about getting flamed by me, only fat heads get that from me.
sorry - could not resist that one .
#196
Zoom-Freakin'-Zoom
iTrader: (5)
Originally Posted by eviltwinkie
I will bet you for sure he will be more keenly aware of it next time...at least we have a symptom for now and some possible ideas...even w/ the turbo/exhaust config the best thing we could do is postulate that its either the location of the turbo and the heat being concentrated in the area...or its simply the heat due to FI and that 90 degree bend which is my current theory...which frankly is a design issue and I would not really blame shortsighted engineering as it was engineered to perform within a set of original design constraints and its accomplishes that job well.
beers
![Beer](https://www.rx8club.com/images/smilies/beer.gif)
#197
Originally Posted by Moon Assad
Ive acually been thinking of puting a flapper valve in the center exaust ports to increase flow. I think if yo leave it kinda sloppy it wouldnt were out and let you use the whole port for flow. I dont have a turbo to worrie about trashing and you can pull the seporater insert if you pull the pin out after a disasembly. Dont worrie about getting flamed by me, only fat heads get that from me.
#198
Originally Posted by swoope
you said flapper valve..
to funny..
beers![Beer](https://www.rx8club.com/images/smilies/beer.gif)
to funny..
beers
![Beer](https://www.rx8club.com/images/smilies/beer.gif)
#199
Originally Posted by swoope
or if the turbo did not flow free enough at the top end.
beers![Beer](https://www.rx8club.com/images/smilies/beer.gif)
beers
![Beer](https://www.rx8club.com/images/smilies/beer.gif)
again i might be missing something...
#200
Have it hinge at the front of the port. It would cover the oppsite port of the exaust discharge and dirrect it 45%, The same job that the split does without closing half the port and no 90% redirection as is now. Ow, they have me on morphine, vikeden and percosets
![Eyecrazy](https://www.rx8club.com/images/smilies/Eyecrazy.gif)
Last edited by Moon Assad; 03-22-2007 at 03:09 AM.