Brettus Turbo install thread
11-06-2012, 04:46 PM
#552
HAVOC
Join Date: Jun 2008
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11-06-2012, 06:59 PM
#553
11-06-2012, 10:06 PM
#554
Ah I see Bret--is the sleeve thickness the same?
Harlan and HF999--I get it. Thats why I said never mind--- but that small bit of higher back pressure is work lost. May not be enough to be concerned with until you start boosting--then that siamesed center port could raise its little ugly head.
I think Bret "saw" something earlier and is doing a field experiment to collect more data?
Have any of you used a thread wand to study the air flow through these areas?
Use one and you will see turbulence in the centerport versus the end ports--now what that means and what affect it has overall--i am not sure.
Harlan and HF999--I get it. Thats why I said never mind--- but that small bit of higher back pressure is work lost. May not be enough to be concerned with until you start boosting--then that siamesed center port could raise its little ugly head.
I think Bret "saw" something earlier and is doing a field experiment to collect more data?
Have any of you used a thread wand to study the air flow through these areas?
Use one and you will see turbulence in the centerport versus the end ports--now what that means and what affect it has overall--i am not sure.
11-06-2012, 10:10 PM
#555
I'm expecting to make 20-30 more whp at the same flow . If that happens ,and it doesn't cook the side seals ,it will have huge implications for the 400whp hopefuls.
Last edited by Brettus; 11-07-2012 at 12:22 AM.
11-07-2012, 09:50 PM
#556
i remember when you posted a picture of the center port "tongue" that was gone--at least I think that was you...dang old brain.
I sure will be interested in your findings.
keep your oil temps to 200f or less on its return to the engine and that will help the side seals a little. Not a big world of difference --but a little.
I sure will be interested in your findings.
keep your oil temps to 200f or less on its return to the engine and that will help the side seals a little. Not a big world of difference --but a little.
11-08-2012, 01:46 PM
#561
if you look closer at the AUX port, two sides are flat, look even closer and you can see that it doesn't go all the way through, its only an indent,
really it means nothing, it could just be an AUTO 16x prototype.
thats my .02
really it means nothing, it could just be an AUTO 16x prototype.
thats my .02
11-08-2012, 04:06 PM
#567
Because with the divider in place the center port sleeve (which is already smaller than the ones on the ends) is half as large. Darn restrictive if you ask me. Brettus claims hp gains and i don't doubt it, I think cutting this divider back so it only prevents exhaust from hitting the other rotor will give decent gains without changing exhaust timing and while having no effect on scavenging. Worth a shot anyway.
11-10-2012, 09:16 PM
#571
numbers to follow at some point--but sometimes you really dont need the numbers old friend.
Its that obvious.
I went from the oem manifold, mazsport midpipe and RB catback.
to a aftermarket header with 1.75 primaries, slip on 3 inch merge collector, removed one resonator from the midpipe and eliminated the flange between the catback and midpipe..
No chokepoints etc now and its straighter.
https://www.rx8club.com/attachment.p...1&d=1352603671
teaser pic but you can get a rough idea--this was before i put my heatshielding on it.
change is apparent from 3k rpm upward.
Its that obvious.
I went from the oem manifold, mazsport midpipe and RB catback.
to a aftermarket header with 1.75 primaries, slip on 3 inch merge collector, removed one resonator from the midpipe and eliminated the flange between the catback and midpipe..
No chokepoints etc now and its straighter.
https://www.rx8club.com/attachment.p...1&d=1352603671
teaser pic but you can get a rough idea--this was before i put my heatshielding on it.
change is apparent from 3k rpm upward.
11-11-2012, 08:57 AM
#572
OD who did your exhaust work?
11-13-2012, 09:56 PM
#574
Dead end path. Racers burned out the center port divider NA, which in turn then burnt out the rotor seals. Without the divider the center iron exhaust flow just slams into the opposing rotor side face. FI will be that much worse for wear ...