right now I have a half bp motor that was built by BDC. we are going to be freshing it up. Im thinking of going to full bp. I have not been around a full bp turbo car, so I though I would ask how much differnt it would be VS my current setup.



will it make the turbo spool faster?

can I use the Rotary Aviation apex seals that I have or do I need to change to 1 piece? the RA seals look like they will work cause where they are cut in two. its not near the edge like factory seals are.



any info or advice would be great



thanks

you can use the corner peice of the apex on a bridge, the seal is in its place very tightly and as long as the bridge wall is there everythign should be ok.

i would also like to know how a turbo would work on a full bridge motor

Didn't you just freshin it up a few months ago? Either way it sounds like a fun project https://www.nopistons.com/forums/pub...IR#>/smile.png

we changed the porting of the secondary bports about 2 months ago we got the motor together and its got a ninja water leak. we are thinking that the rotor housings are warped. we had them powder coated sliver and thinking that heating them to 450 for 25 min has warped them. we are going to changed to housings that have not been coated yet.



and while it was apart the next level is full bp so we are trying to desided if we will step up to full bp. I want to see how a full bp turbo car does. if it does not work out will change out the center iron and go with half. but you never know how it works till you try it.





and noone has posted about anyone else using full bp turbo.

Only full turbo bps I have seen are drag only 8/9sec cars. There is a guy up here running twin t66s on a full bp. Single digit fd. https://www.nopistons.com/forums/pub...DIR#>/ohmy.png

A mate of mine runs the Datsun 1200 in Australia with a full Bridge Port Turbo. It went 8.15@163mph with around 26psi being used on that run.



http://www.fullboost.com.au/racing/d...ree_2_021b.jpg



http://www.fullboost.com.au/events/g...04_02_019b.jpg



http://www.fullboost.com.au/events/g...04_02_020b.jpg



http://www.fullboost.com.au/events/g...04_02_018b.jpg

https://www.nopistons.com/forums/pub...1047683894.gif damn thats nice

https://www.nopistons.com/forums/pub...IR#>/boink.gif

Holy CRAP AN stuff is sexy! The donk is schweeeeet.

i could have sworn there was a guy from NYC with one on his FD posted about it not 2 months ago...

Yeah but that guy said alot of stuff.

I don't know if he posts around here, but IIRC there was a guy named Rob in Japan (sokudo) with a turboed full bridge in an FD. I think he was using a T51R Kai? Maybe a google search on that sokudo name would bring up something....

His site is www.jouleusa.com and last I heard he was making 655 rwhp @ 25psi with the HKS T51 kai.

Alf (Soul Assassin) was making 620 rwhp @ 22 psi with a very similar setup (full BP, t51) on a red FC he used to drive.

What I do to those cars = https://www.nopistons.com/forums/pub...1047683894.gif



There's videos of their cars floating around the RX-7 Club. The sound... wow! I need to find that video of Sokudo's showing a closeup of his turbo inlet while reving the engine https://www.nopistons.com/forums/pub...IR#>/boink.gif

The same way it works on a streetported engine, a stock engine, or any engine for that matter.

HAHA ...... dick there is alot more to think about as in overlap and cracking a bridge . im sorry but there is ALOT more to think about than when just using "a streetported engine, a stock engine, or any engine"

Now now, no need for name calling.

And of course there are other factors to consider, but that wasn't your question. You asked how a turbo would work on that type of engine, so I told you how.

So....?

Soul Assassin had a full BP with a t51, I think he is going to be building another RX7, unless the thread on the "other" forum was a joke.

sorry about that it just seemed like every one was jumping on my back when ever i post, but i also misread alot https://www.nopistons.com/forums/pub...#>/biggrin.png sorry for the name calling. What are the pros and cons of a full bridge turbo ?





David

Advantages:

- awe inspiring power potential (up to around 950-1000 bhp)\

- faster turbo spool up (compared to 1/2 BP or Streetport on same setup)

- coolest sounding engine in town

- awe inspiring power!



Disadvantages:

- less "off-boost" power vs streetport

- more fuel consumption

- shorter lifespan and less reliable

- LOUD (some may argue that they like loud cars, but they are the ones who have not heard a bridgeported rotary with open exhaust before!)

- to make serious power you need to rev that much higher, so more wear and tear on components which need to be upgraded to allow this operation



I'm actually going to be building a full bridgeport S5 engine this fall. I'm planning a 9,500 redline, 20 psi max boost and looking for about 1 bar at or before 4,000 rpm. Not totally set on which turbocharger and size right now, but it seems to be coming down to the T66, T51 kai, TA45, GT40, GT42.

Any suggestions?

a buddy of mine had a full bp rx3 (na) and here are the differences vs a stock port.



pros:

more torque from 2000-11,000rpm

sounds neat

25+ mpg on the freeway



cons:

does not do part throttle under 5000rpm

when you cut the water jacket engine life goes way down (12-18months, before it starts sucking water)





the car was NOT loud, it was using 2 loooong glas packs and 2 turbo mufflers, it was very reasonable

The part throttle drivability, and power below 5k would have been much better with a free-flowing exhaust. But those are *loud*

Even properly tuned with a stand alone EMS a BP motor won't do partial throttle below 5K? What happens when you try? Do they try to stall out?

Sorry, never driven a BP car before, just courious.



Thanks,

-Ryan

Ours do. The half-BP combinations I've been doing lately seem to drive well from about ~2krpm and above... around that neighbourhood and below, it will stutter and bounce around a bit.



B

thats what the full bp did, but up to 4500-5k

wow thanks for all great replys. we are going to give it a try to see how it does. if we dont like it we can always change out the center iron.



hopefully we can build it up this week