Author Topic: Bridge vs street or varieties there of  (Read 609 times)

Offline scooby_si

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Bridge vs street or varieties there of
« on: January 07, 2005, 06:46:10 PM »
just to get another stupid question off my mind http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/4/4_12_11.gif\' border=0> 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........http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/36/36_2_29.gif\' border=0>
Si

travellinbob

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Bridge vs street or varieties there of
« Reply #1 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

Offline scooby_si

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Bridge vs street or varieties there of
« Reply #2 on: January 07, 2005, 07:05:10 PM »
looking long term big momma of a single tubby......
Si (needs a money making scheme.....http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/7/7_15_5v.gif\' border=0>)

Offline sadgoth

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Bridge vs street or varieties there of
« Reply #3 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!)
Mark
89 Black FC3S Turbo II
1/2 Bridge port   Microtech LT10s   TII Conv Aluminium Bonnet & Leather seats   Koni Shocks Pi Springs   De-catted 3" exhaust  
GT4088 turbo   Walbro fuel pump   1000cc injectors   custom V-Mount   Blitz Boost Controller (ok so the boost controller is still to fit)

Loud? Hell yes! :D

dai capp

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Bridge vs street or varieties there of
« Reply #4 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

mattmaclennan

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Bridge vs street or varieties there of
« Reply #5 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

Offline sadgoth

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Bridge vs street or varieties there of
« Reply #6 on: January 07, 2005, 11:32:59 PM »
Quote
GT51R 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!
Mark
89 Black FC3S Turbo II
1/2 Bridge port   Microtech LT10s   TII Conv Aluminium Bonnet & Leather seats   Koni Shocks Pi Springs   De-catted 3" exhaust  
GT4088 turbo   Walbro fuel pump   1000cc injectors   custom V-Mount   Blitz Boost Controller (ok so the boost controller is still to fit)

Loud? Hell yes! :D

Offline 20B_boy

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Bridge vs street or varieties there of
« Reply #7 on: January 08, 2005, 01:00:39 AM »
Quote
Originally posted by sadgoth
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!

As Matt would say: "RUBISH" :D

If you arent in boost you r in the wrong gear :)

Now go fit the MicroTech!
R.

mattmaclennan

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Bridge vs street or varieties there of
« Reply #8 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.

Offline sadgoth

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Bridge vs street or varieties there of
« Reply #9 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
Mark
89 Black FC3S Turbo II
1/2 Bridge port   Microtech LT10s   TII Conv Aluminium Bonnet & Leather seats   Koni Shocks Pi Springs   De-catted 3" exhaust  
GT4088 turbo   Walbro fuel pump   1000cc injectors   custom V-Mount   Blitz Boost Controller (ok so the boost controller is still to fit)

Loud? Hell yes! :D

mattmaclennan

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Bridge vs street or varieties there of
« Reply #10 on: January 08, 2005, 10:35:15 AM »
MWAHAHAHAHA Fantastic news...

Offline scooby_si

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Bridge vs street or varieties there of
« Reply #11 on: January 08, 2005, 11:19:26 AM »
it\'s all good food for thought, as i say hopefully a fairway http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/18/18_12_3v.gif\' border=0> off needing a rebuild but who knows so i just like to ponder on my options......& save for them http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/10/10_12_8.gif\' border=0> lol
i do have a devil on me shoulder saying to go full monty http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm46052GB\' target=\'_blank\'>http://smileys.smileycentral.com/cat/10/10_1_26.gif\' border=0>
Si

Offline Shaq

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Bridge vs street or varieties there of
« Reply #12 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
12.7 on stock twins @ 1 bar (i reckon i can do better!)