Originally Posted by ericgrau
(Post 7558073)
Expect 10mpg or less on a BP or PP. Peak HP is higher than a street port, but the 0-60 on a BP is often the same or lower than a street port. i.e., your power during normal driving will actually stay the same or decrease on a BP. You only get the extra power if you rev high all the time. Noise will also increase a great deal. Saying "It's streetable" is kind of like saying, "It's fine". BP's are perfectly streetable if gas prices don't bother you and you spend all your time in the high revs anyway.
Hmm, NO! Higher sound leves = Yes Horrible MPG = YES Everything else = NO |
Originally Posted by Roen
(Post 7558423)
Pports being well behaved like idle even higher or lower?
MAXT can get a full pport engine to idle as low as 900rpm :shocking: |
Originally Posted by stage3_rx7
(Post 7517893)
I have around 230whp. Just with a bridgeport and exhaust.(2.5k)
|
Sell your car and buy a 240 if you wanna be a drifter fad dousche.
|
Originally Posted by phoenix7
(Post 7554091)
cool, got any examples? I'd love to see some BP and PP rotaries right now.
|
Originally Posted by ka24.ej20
(Post 7560906)
How much did you spend on bridgeport? Thank you
|
lol, I wouldn't be able to afford 15 mpg! My daily drive eats up way too much gas.
|
All I can say is buy a bike to commute with. I bought a 250 Ninja in 06' because my 7 was eating too much gas. The $125/month bike payment more than makes up for the money you save on gas. Plus then it saves your car from wear and tear.
|
.i spend around like $180(3 fill ups) |
IMO, NA bridgeports (and beyond) are only good for two things; race cars that aren't allowed to use turbos and little boys desperately seeking attention. Given the almost complete lack of of advantages a BP engine has over a 13BT providing similar performance, it's hard to see any other worthwhile uses... :)
|
Originally Posted by Roen
(Post 7558423)
Pports being well behaved like idle even higher or lower?
MAXT can get a full pport engine to idle as low as 900rpm |
IF you only BPed the secondary ports, would the engine idle better then if you BPed the primary port considering the secondary runners are closed? Also, if you some how kept the secondary runners closed till say 2500rpm or so, would you still have the low end power or would you still suffer a lot of low end loss due to the BP.
|
I wonder about the NA 2/3 BP. I know there's a cult following of the HBP, though I don't know how that would work in an NA application. Though, I do know a lot of people hate the NA 1/3 BP or the Aux Bridge as it's so commonly referred to.
|
I really, really wish people would understand how overlap works. :)
Originally Posted by RotaMan99
(Post 7566597)
IF you only BPed the secondary ports, would the engine idle better then if you BPed the primary port considering the secondary runners are closed?
Also, if you some how kept the secondary runners closed till say 2500rpm or so, would you still have the low end power or would you still suffer a lot of low end loss due to the BP.
Originally Posted by Roen
(Post 7566707)
I wonder about the NA 2/3 BP. I know there's a cult following of the HBP, though I don't know how that would work in an NA application. Though, I do know a lot of people hate the NA 1/3 BP or the Aux Bridge as it's so commonly referred to.
I did the aux bridge because originally I wanted to keep the aux port actuators functional. Moving to a larger turbo then stock immediately made that impossible due to packaging concerns, the manifold needed to be simplified and the restriction of the sleeves at high HP was to great. If I had to do it all over again knowing I would not use the aux port actuators I would have treated the engine to a full bridge. While the aux bridge clearly works for me, in an NA application there is no benefit and even my setup would benefit greatly from a proper half bridge. Those "cult" followers of the aux bridge just don't know enough to realise it's pointless when NA, and a big disadvantage over a half/full bridge when turbocharged. There is a major reason why the next NA-turbo engine I build (for my '76 Cosmo) will have fully functional aux ports, a minor streetport on the secondaries/aux, and only widening on the exhausts. Also a small turbo. |
I really, really wish people would understand how overlap works. Thanks for the info. |
well, in a 6 port engine, the 2/3 BP would be the equivalent of the HBP on the 4-ports, correct?
Wouldn't you be able to use a BNR hybrid turbo with the stock 6PI actuators? How would that go for drivability on the aux bridge turbo? |
Originally Posted by Aaron Cake
(Post 7569077)
Those "cult" followers of the aux bridge just don't know enough to realise it's pointless when NA, and a big disadvantage over a half/full bridge when turbocharged.
There is a major reason why the next NA-turbo engine I build (for my '76 Cosmo) will have fully functional aux ports, a minor streetport on the secondaries/aux, and only widening on the exhausts. Also a small turbo. How then have guys around here and in NJ built some pretty impressive bridge ported NA's? I recall this past summer talking to a guy at the PanAms with a bridge ported NA (and nos) 6 port, running high 11's on the track. I honestly never understood why soooo many people are quick to judge without seeing a 1st hand display of what a 6port 13b can do.:) |
^^
lol, waiting for the hammer to hit Aaron's saying just bridgeporting the Aux ports and leaving the primaries/secondaries stock or streetported doesn't work very well. |
Originally Posted by Roen
(Post 7569119)
well, in a 6 port engine, the 2/3 BP would be the equivalent of the HBP on the 4-ports, correct?
Wouldn't you be able to use a BNR hybrid turbo with the stock 6PI actuators? How would that go for drivability on the aux bridge turbo? The drivability of an aux bridge car is exactly the same as any bridgeport. Lumpy idle, poor fuel economy down low. It's also more difficult to tune as it draws far less vacuum then a stock/street port car.
Originally Posted by Latin270
(Post 7569258)
Let me get this strait....you are claiming that bridge porting the aux.port is pointless?
How then have guys around here and in NJ built some pretty impressive bridge ported NA's? I recall this past summer talking to a guy at the PanAms with a bridge ported NA (and nos) 6 port, running high 11's on the track. I honestly never understood why soooo many people are quick to judge without seeing a 1st hand display of what a 6port 13b can do.:) http://www.aaroncake.net/rx-7/projec...x.html#phaseII |
Originally Posted by Aaron Cake
(Post 7570386)
No. Just bridgeporting the aux ports has totally different timing then a proper half bridge. It opens later, closes later, and flows less.
No. Even with a spacer, the turbo sits in the same space the actuators occupy. Making a custom manifold to move the turbo out is an option of course, but I'm not big on hybrid stock turbos for a number of reasons. The drivability of an aux bridge car is exactly the same as any bridgeport. Lumpy idle, poor fuel economy down low. It's also more difficult to tune as it draws far less vacuum then a stock/street port car. Bridge porting only the aux ports is pointless, yes. They did a half bridge or full bridge. It's not rocket science. :) Perhaps you should take a closer look at my setup: http://www.aaroncake.net/rx-7/projec...x.html#phaseII the 2/3 BP is the Aux and Secondaries Bridge. I'm asking is the 2/3 BP the same as a HBP on a 4 port? |
Originally Posted by Roen
(Post 7570411)
The 1/3 BP is the Aux Bridge
the 2/3 BP is the Aux and Secondaries Bridge. I'm asking is the 2/3 BP the same as a HBP on a 4 port? An aux bridge is just the aux ports. I guess it could be acceptable to call it a "1/3" bridge but that's very akward. A half bridge is a bridgeport applied to the end irons (which in a 6 port config includes the secondary and aux). A full bridge includes the primaries as well. |
I'm just thinking of it as number of ports bridged, since the 6-ports have three sets of ports, primaries, secondaries and auxillaries.
|
Yes, but those are unconventional terms and most people don't think that way.
That said, a half bridge is a half bridge no matter which engine it's applied to. I've seen a bunch of half bridged 6 port plates but have not yet done one myself. The limitation is the stock intake manifold. Everything works great at full throttle, but at part throttles I expect it to run very poorly. |
Originally Posted by 1RevvinFC3S
(Post 7561017)
Sell your car and buy a 240 if you wanna be a drifter fad dousche.
|
Originally Posted by magus2222
(Post 7552650)
heres the best way to do it (sorry slpin, beat you to it)
1) unskrew the 4 bolts on the air filter box 2) take out the filter 3) install a new car peace |
All times are GMT -5. The time now is 04:25 AM. |
© 2024 MH Sub I, LLC dba Internet Brands