Title: Bridge vs street or varieties there of
Post by: scooby_si on January 07, 2005, 06:46:10 PM
Post by: scooby_si on January 07, 2005, 06:46:10 PM
just to get another stupid question off my mind 
what are the notable difference between the various porting options...
Now basics as i understand it is bridge will give potential big gains but idle real high & be a total beatch in traffic idleing etc.
Anything more specific productive or otherwise would be nice.
Love the idea of a stoopid bridgey but come on folks what\'s the devil in the detail........
Si
what are the notable difference between the various porting options...Now basics as i understand it is bridge will give potential big gains but idle real high & be a total beatch in traffic idleing etc.
Anything more specific productive or otherwise would be nice.
Love the idea of a stoopid bridgey but come on folks what\'s the devil in the detail........
Si
Title: Bridge vs street or varieties there of
Post by: travellinbob on January 07, 2005, 06:52:24 PM
Post by: travellinbob on January 07, 2005, 06:52:24 PM
Are you talking with or without turbo? Or just a naturally aspirated 13b with a weber? more detail for the audience!:D
Title: Bridge vs street or varieties there of
Post by: scooby_si on January 07, 2005, 07:05:10 PM
Post by: scooby_si on January 07, 2005, 07:05:10 PM
looking long term big momma of a single tubby......
Si (needs a money making scheme.....
)
Si (needs a money making scheme.....
)
Title: Bridge vs street or varieties there of
Post by: sadgoth on January 07, 2005, 07:16:23 PM
Post by: sadgoth on January 07, 2005, 07:16:23 PM
go 1/2 bridge best of both worlds! :D
decent streetport on the primaries
bridgeport secondaries
I don\'t have much problem in traffic, get som odd looks as it hunts a bit at idle but that\'s all. Braking is interesting (I\'ll let a more teckie person explain why!)
decent streetport on the primaries
bridgeport secondaries
I don\'t have much problem in traffic, get som odd looks as it hunts a bit at idle but that\'s all. Braking is interesting (I\'ll let a more teckie person explain why!)
Title: Bridge vs street or varieties there of
Post by: dai capp on January 07, 2005, 07:19:41 PM
Post by: dai capp on January 07, 2005, 07:19:41 PM
I\'ve just started digging into this...
It would be good to know what the differences would be for both twin and single turbo set ups in terms of power gains and when the benefits run out for a twin set up...
As far as I can make out you can go as far as you want with porting on the twin turbos but the benefits of more extreme porting are really only realised once you go to a single turbo set up.
Any info would be good...
Cheers
DC
It would be good to know what the differences would be for both twin and single turbo set ups in terms of power gains and when the benefits run out for a twin set up...
As far as I can make out you can go as far as you want with porting on the twin turbos but the benefits of more extreme porting are really only realised once you go to a single turbo set up.
Any info would be good...
Cheers
DC
Title: Bridge vs street or varieties there of
Post by: mattmaclennan on January 07, 2005, 11:05:49 PM
Post by: mattmaclennan on January 07, 2005, 11:05:49 PM
That\'s because the twin turbo pack is rubish... yes you hear me... RUBISH, and a bitch to remove and refit. A GT51R fits just lovely... why doesn\'t every FD have one?????:D
Title: Bridge vs street or varieties there of
Post by: sadgoth on January 07, 2005, 11:32:59 PM
Post by: sadgoth on January 07, 2005, 11:32:59 PM
QuoteGT51R fits just lovely... why doesn\'t every FD have one?????
Because Matt, while you are waiting for the thing to get on boost you could read the whole of War & Peace! :rollin Admittedly once boost arrives you could travel back in time to before you read it but still!
Title: Bridge vs street or varieties there of
Post by: 20B_boy on January 08, 2005, 01:00:39 AM
Post by: 20B_boy on January 08, 2005, 01:00:39 AM
QuoteOriginally posted by sadgothAs Matt would say: "RUBISH" :D
Because Matt, while you are waiting for the thing to get on boost you could read the whole of War & Peace! :rollin Admittedly once boost arrives you could travel back in time to before you read it but still!
If you arent in boost you r in the wrong gear :)
Now go fit the MicroTech!
Title: Bridge vs street or varieties there of
Post by: mattmaclennan on January 08, 2005, 02:03:25 AM
Post by: mattmaclennan on January 08, 2005, 02:03:25 AM
you\'ve been told!
back to the topic though; generaly, the more aggressive the porting the larger the power increase at the top end and the more "undrivable" at the bottom end. The glory of the Mazda rotary though is that as Mark pointed out, you can "tune" the primarys independantly from the secondaries, which might offer a good compromise. Some tuners focus more on the exhaust ports and make them really bloody big, this can bring faster turbo spooling and better top end. The other thing to consider is who to choose to do the work... the craftsmen avaliable in this country have different styles and their signiture techniques are based on different backgrounds and experiences. Saying this, there\'s nothing worse than a really well ported engine with a crap map. Mark, I do believe you have been told twice, if you make it a third time, you\'ll have to stand in the corner and face the wall!!:D :p Hope my incy wincy bit of knowledge is food for thought Si.
back to the topic though; generaly, the more aggressive the porting the larger the power increase at the top end and the more "undrivable" at the bottom end. The glory of the Mazda rotary though is that as Mark pointed out, you can "tune" the primarys independantly from the secondaries, which might offer a good compromise. Some tuners focus more on the exhaust ports and make them really bloody big, this can bring faster turbo spooling and better top end. The other thing to consider is who to choose to do the work... the craftsmen avaliable in this country have different styles and their signiture techniques are based on different backgrounds and experiences. Saying this, there\'s nothing worse than a really well ported engine with a crap map. Mark, I do believe you have been told twice, if you make it a third time, you\'ll have to stand in the corner and face the wall!!:D :p Hope my incy wincy bit of knowledge is food for thought Si.
Title: Bridge vs street or varieties there of
Post by: sadgoth on January 08, 2005, 10:26:21 AM
Post by: sadgoth on January 08, 2005, 10:26:21 AM
yeah yeah yeah! The Microtech LT10S along eith injectors and fump are going to be ordered next week so should be with me in 2-3 weeks. Then I\'ll be on the phone to u Matt for phase two :D
Title: Bridge vs street or varieties there of
Post by: mattmaclennan on January 08, 2005, 10:35:15 AM
Post by: mattmaclennan on January 08, 2005, 10:35:15 AM
Title: Bridge vs street or varieties there of
Post by: scooby_si on January 08, 2005, 11:19:26 AM
Post by: scooby_si on January 08, 2005, 11:19:26 AM
it\'s all good food for thought, as i say hopefully a fairway 
off needing a rebuild but who knows so i just like to ponder on my options......& save for them 
lol
i do have a devil on me shoulder (http://instagiber.net/smiliesdotcom/contrib/ruinkai/FIREdevil.gif) saying to go full monty
Si
off needing a rebuild but who knows so i just like to ponder on my options......& save for them loli do have a devil on me shoulder (http://instagiber.net/smiliesdotcom/contrib/ruinkai/FIREdevil.gif) saying to go full monty
Si
Title: Bridge vs street or varieties there of
Post by: Shaq on January 08, 2005, 07:40:34 PM
Post by: Shaq on January 08, 2005, 07:40:34 PM
I think this may help you to understand types of porting:
http://www.rotaryengineillustrated.com/RE101pages/4-ports101.html
shaQ
http://www.rotaryengineillustrated.com/RE101pages/4-ports101.html
shaQ