Bridgeport vs. 1/2 Bridge ?
#26
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I actually just went by Brian's (BDC's) house today to drop off mufflers for another forum member and we talked about bridgeports, among other things. What he told me is basically what slammed said. He (way back) used to not see the point until a friend talked him into doing a small half bridge and he immediately notice an earlier spool of the turbo, and it didn't drop off high up. Hes definately sold me on a half bridge whenever I can finally afford a turbo car. He also sold me on Atkins seals, but thats a different story...
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castillo.muguel (03-05-18)
#27
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spooling a turbo up is all about velocity. i don't see how a half bridge helps that... but i am intrigued. we usually give the exhaust ports a little earlier opening and a more direct flow out the port to help spool the turbo's up. didn't think a panty line over the secondary intake port would help with spool. it definitely didn't on my buddies car full boost @ 5k on a 57 trim... not even a 60-1 but like i said that turbo sucked and his new one will show the true value.
i honestly may just do a half bridge anyways just to fully see if it's worth it or not. i'm not a big fan of the brap brap idle tho :/ hahaha
and again, i do apologize if you think i'm bashing. i'm not trying to, i praise bdc for his work. he's a great guy and very smart with rotaries. i'm just not sold on the half-bridge yet, but i want to be hahaha. i'm just being stubborn i guess. i'm running twin t04's on my TII so spool isn't really the issue. it's full power and i know that i can make my goal on a street port. but if a half bridge will truly allow me to make my goal at a significantly lower boost ratio or so then i will be sold.
hmmm... i dunno... i'm a little drunk at the moment hahahahah SORRY!
i honestly may just do a half bridge anyways just to fully see if it's worth it or not. i'm not a big fan of the brap brap idle tho :/ hahaha
and again, i do apologize if you think i'm bashing. i'm not trying to, i praise bdc for his work. he's a great guy and very smart with rotaries. i'm just not sold on the half-bridge yet, but i want to be hahaha. i'm just being stubborn i guess. i'm running twin t04's on my TII so spool isn't really the issue. it's full power and i know that i can make my goal on a street port. but if a half bridge will truly allow me to make my goal at a significantly lower boost ratio or so then i will be sold.
hmmm... i dunno... i'm a little drunk at the moment hahahahah SORRY!
Last edited by No_Rotor_RX7; 10-08-06 at 01:52 AM.
#28
I am shooting for around 400 rwhp. I want to be able to do this without pushing the limits of the motor for greater dependability. The same idea is going to be carried over to the turbo that I will use on this project.
So, what would be a fitting turbo for this? I am looking to run a Haltek E6K on it as well. I am trying to get all of the parts needed to start my project by early next year. ie...turbo, ems, injectors, ignition, and fuel supply system. Any input on these other matters would be greatly appreciated.
Thanks
So, what would be a fitting turbo for this? I am looking to run a Haltek E6K on it as well. I am trying to get all of the parts needed to start my project by early next year. ie...turbo, ems, injectors, ignition, and fuel supply system. Any input on these other matters would be greatly appreciated.
Thanks
#29
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Originally Posted by sniperstevedave
Is it true that bridgeporting has the least effects on reliability and streetability (for an n/a)?
Most porting does not effect reliability unless you are talking about seal-eating streetports (BIG ports that cut into the seal paths) or j-bridges.
Originally Posted by raptor22
So, I am curious, this means that you can't half-bridge a 4 port engine?
Originally Posted by NMJ87T2
I am shooting for around 400 rwhp. I want to be able to do this without pushing the limits of the motor for greater dependability. The same idea is going to be carried over to the turbo that I will use on this project.
So, what would be a fitting turbo for this? I am looking to run a Haltek E6K on it as well. I am trying to get all of the parts needed to start my project by early next year. ie...turbo, ems, injectors, ignition, and fuel supply system. Any input on these other matters would be greatly appreciated.
Thanks
Thanks
#33
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Originally Posted by sikrx
so lets say if I got a bridgeport on a s5 FC NA, what kind of ECU would i need to make it run properly?
A bridgeport is probably overkill for an NA, though. It would have a pretty peaky powerband, not something well suited for street use. You can get 170+ to the wheels with a good streetport and some fuel control, and still have it very usable around the street.
#34
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wow, this is a great thread, some fantastic info here.
I think that the stock TII manifolds are restrictive personally, I can't think of what else would be making my topend suck. I gotta go check my intake manifold thread!
You need a standalone to make any bridgeport run properly. (or a carb)
I think that the stock TII manifolds are restrictive personally, I can't think of what else would be making my topend suck. I gotta go check my intake manifold thread!
You need a standalone to make any bridgeport run properly. (or a carb)
#35
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I dont think the BPs unreliable at ALL. I drive mine everywhere even untuned with about 200 miles on tank. Just watch who does your cuts..they may cut too close.
But anywho, the BP spools the turbo quick because obviously the cut allows air to come straight in and straight out the exhaust ports. But i will say not everyone will need a BP.
But anywho, the BP spools the turbo quick because obviously the cut allows air to come straight in and straight out the exhaust ports. But i will say not everyone will need a BP.
#37
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I ran a t78 on my streetport FD for a short time, right before I knew I was going to rebuild and HBP (different irons). I got spool around 4300 with a little power dropoff after 7800.
WIth all else in the setup left the same except the porting I immediately saw faster and stronger pull from the turbo, spool by 36-3700, and stronger pull on the top end.
I've never heard anything bad from people who actually ran a HBP, other than the extra noise and slightly high idle. Everyone loves the driveability and power output.
WIth all else in the setup left the same except the porting I immediately saw faster and stronger pull from the turbo, spool by 36-3700, and stronger pull on the top end.
I've never heard anything bad from people who actually ran a HBP, other than the extra noise and slightly high idle. Everyone loves the driveability and power output.
#40
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Originally Posted by sikrx
so lets say if I got a bridgeport on a s5 FC NA, what kind of ECU would i need to make it run properly?
If you are bridgeporting an NA, you are probably going for max power. So don't bother with a half bridge. Go full bridge or go home. Both will have basically the same low end and light throttle issues, as well as the idle...
But especially with the S5, you have to look at something other then the stock NA intake. Either swap on the TII intake, use something like the individual throttle bodies or make something custom. I bet the VDI doesn't like bridgeports one bit.
Originally Posted by Terrh
wow, this is a great thread, some fantastic info here.
I think that the stock TII manifolds are restrictive personally, I can't think of what else would be making my topend suck. I gotta go check my intake manifold thread!
I think that the stock TII manifolds are restrictive personally, I can't think of what else would be making my topend suck. I gotta go check my intake manifold thread!
You need a standalone to make any bridgeport run properly. (or a carb)
Originally Posted by J-Rat
Okay,
Everyone knows they dont last a long time, but with everything else in the rotary world, there have been MAJOR advances. Please dont think I am trying to call you out. Just let me know when you exceed 10-12000.
Everyone knows they dont last a long time, but with everything else in the rotary world, there have been MAJOR advances. Please dont think I am trying to call you out. Just let me know when you exceed 10-12000.
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#44
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Aux Bridge...
I'd like to hear more about this auxilary bridge (and no, I ain't talking Star Trek, neither ). It sounds kind of interesting. You might be able to increase the top end without affecting the low end (for a S5 n/a with standalone).
30k miles, is 50k km in real units.
30k miles, is 50k km in real units.
Last edited by sniperstevedave; 10-09-06 at 02:16 PM.
#45
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Originally Posted by J-Rat
I am talking fullbridge.. and for reference, 50k is 30k miles.
#47
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I know brian, thanks..
The question is, what is a reliable amount of mileage you can expect from a fullbridge?
I say 10k or so.. If its more, then GREAT! That means the Bridge is coming up well! Just give me concrete examples!
Please believe me when I say I am NOT trying to instigate some form of flame war. Just some good solid evidence that the full port is starting to outlast its "reputation" if it were..
The question is, what is a reliable amount of mileage you can expect from a fullbridge?
I say 10k or so.. If its more, then GREAT! That means the Bridge is coming up well! Just give me concrete examples!
Please believe me when I say I am NOT trying to instigate some form of flame war. Just some good solid evidence that the full port is starting to outlast its "reputation" if it were..
#48
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I am sure that you know brian, I know brian myself, he lives 2 minutes from me. lucky me. Also I know that you are not trying to get things stirred up. I guess if you lived by us and lived and breathed BPs 24/7, you'd be just as sold. I honestly think I've got more than 7k on my BP, As I come to think of it we did it back in Jan 04'. Bought a Jspec tore it down and went straight to town on it. So...Over two years of driving everywhere in it, Im sure that is more an 10k.
#49
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to bring the point up again since i'm not the only one who wants to know:
aux bridges on a 6 port motor?
this is a setup i'm thinking of in my head . . .
true duals
electronic aux ports
true cold air or ram air intake
possibly a custom designed plenum
and the BP aux ports only
running on standalone
wouldnt that be sexy?
bolt a cat in for emissions day and other than that its fun time!
aux bridges on a 6 port motor?
this is a setup i'm thinking of in my head . . .
true duals
electronic aux ports
true cold air or ram air intake
possibly a custom designed plenum
and the BP aux ports only
running on standalone
wouldnt that be sexy?
bolt a cat in for emissions day and other than that its fun time!
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oh ok, i see why it's a little more reliable...... cause there's barely an eyebrow there! i call that a panty port
nah i'm just messin. looks good... i'm still debating. i may just give it a shot. if i don't like it or it doesn't work out i can just build another one.
nah i'm just messin. looks good... i'm still debating. i may just give it a shot. if i don't like it or it doesn't work out i can just build another one.