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Bridgeport RX8

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Old 06-23-2009, 09:38 PM
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Originally Posted by ChrisRX8PR
The stock car has two, its actually four small ones but they count as two. I add two more. One goes right in between the spark plugs and the other one goes one over past the stock top dowel pin. In the pic you can see the two I add.

These two dowels will prevent the dowel ring land on the front plate from cracking under detonation or extreme power which is the next thing to go after you have strong apex seals or if by some weird reason your stock ones don't break first. When this cracks it starts leaking oil even though it remains running perfect. There is also a modification that is done to these bores to ensure that the load is not concentrated on the surface of the plates...this is my technique and I don't want to let it out of the bag. With the extra dowels and modifications....you can pretty much boost it past 30psi if you like and have enough fuel without any issues.

Chris
ahh is this like the video mysql had before he rebuilt? when it was off no oil leak but as soon as it was running oil appeared.

edit: is the water jacket chamber around the two spark plugs modified also ?

Last edited by czar; 06-23-2009 at 09:47 PM.
Old 06-24-2009, 08:26 AM
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Originally Posted by Brettus
Don't ask me how I already know this
I can imagine....it sucks too because its a perfectly running engine that you must pull out..... :/
Old 06-24-2009, 08:27 AM
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Originally Posted by czar
ahh is this like the video mysql had before he rebuilt? when it was off no oil leak but as soon as it was running oil appeared.

edit: is the water jacket chamber around the two spark plugs modified also ?
The water jacket is untouched...what you see is how it is OEM...

Chris
Old 06-25-2009, 10:02 AM
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Engine went in yesterday!

Here are a few pics of it assembled before I dropped it in....don't uncross those fingers.
Attached Thumbnails Bridgeport RX8-motor-side-1.jpg   Bridgeport RX8-motor-rear.jpg   Bridgeport RX8-motor-side-2.jpg  
Old 06-25-2009, 11:01 AM
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OH, BTW...I vote that this thread be moved to the Major HP uprades...since its more about engine modification than tuning.

Anyone else with me?

Chris
Old 06-25-2009, 11:12 AM
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/\ Yeah I agree as well about that.
Old 06-25-2009, 11:15 AM
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hmm its only a bridgeported rx8 , with a huge turbo and a custom upper intake manifold whats so major >_>


well maybe lol
Old 06-25-2009, 11:26 AM
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Originally Posted by ChrisRX8PR
OH, BTW...I vote that this thread be moved to the Major HP uprades...since its more about engine modification than tuning.

Anyone else with me?

Chris
Agreed, It has been moved.
Old 06-25-2009, 11:45 AM
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Originally Posted by ChrisRX8PR
Engine went in yesterday!

Here are a few pics of it assembled before I dropped it in....don't uncross those fingers.
How is the OMP holding up next to the down pipe?
Old 06-25-2009, 12:58 PM
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Originally Posted by 09Factor
How is the OMP holding up next to the down pipe?
That is the manifold not the downpipe but to answer you question, Perfectly fine That shielding that you see in the pics keeps it from receiving any of the heat from the manifold. Its actually really amazing/impressive stuff. We include enough of that material to wrap the OMP in it...its pretty thick and it works great. My car has had this stuff on it for over 3 years...with no issues....OMP still works great!

Chris
Old 06-25-2009, 01:03 PM
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that good to know i was actually worried about the heat getting around that area
Old 06-25-2009, 04:44 PM
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Originally Posted by ChrisRX8PR
That is the manifold not the downpipe but to answer you question, Perfectly fine That shielding that you see in the pics keeps it from receiving any of the heat from the manifold. Its actually really amazing/impressive stuff. We include enough of that material to wrap the OMP in it...its pretty thick and it works great. My car has had this stuff on it for over 3 years...with no issues....OMP still works great!

Chris

Duh I knew that.. Good to know and thanks for the anwser.
So what it the magical adhesive heat shield?
Old 06-26-2009, 10:18 PM
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exciting stuff finally happening in the rx8 porting world. can't wait to see dyno!
Old 06-27-2009, 02:46 AM
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Oh yea, after hearing the clip on youtube... dynochart would be most interesting... more info on the bp'd renny por favor =)
Old 06-27-2009, 02:40 PM
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dyno and lots and lots of videos ^_^
Old 06-27-2009, 03:10 PM
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I wonder how reliable it is.
Old 06-27-2009, 11:15 PM
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Originally Posted by shazy
I wonder how reliable it is.
Question: How would it be un-reliable?

B
Old 06-28-2009, 04:39 AM
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Please post some dyno charts.

Old 06-28-2009, 05:30 PM
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Originally Posted by BDC
Question: How would it be un-reliable?

B
My only concern would be the Apex end wedge as it passes the bridge port. Removing the rotor housing material to accommodate the ported plate has made an area where the only spot holding it in is the actual bridge between the ports.
Unless of course you put the apex in so that the wedge is on the center cast iron plate. Of course this is only relevant with the rear plate due to the assembly process.
Old 06-28-2009, 05:41 PM
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Originally Posted by Easy_E1
My only concern would be the Apex end wedge as it passes the bridge port. Removing the rotor housing material to accommodate the ported plate has made an area where the only spot holding it in is the actual bridge between the ports.
Unless of course you put the apex in so that the wedge is on the center cast iron plate. Of course this is only relevant with the rear plate due to the assembly process.
My solution as follows:

1. I only bridged the front and rear plates which means that the housings are only chamfered where they meet the front and rear plate.
2. I installed the apex seals for the rear rotor with the wedge towards the center plate which has no bridge... (yes it was a PITA but its doable...)

This way I was able to go with substantial bridge and "eyebrow" without worry of the apex seal getting caught or the bridge being to thin because of attempting to keep the housing untouched...

its like the best of both worlds..

Chris...

p.s....she runs....
Old 06-28-2009, 05:43 PM
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^vids, sound clips now! ack!
Old 06-28-2009, 05:44 PM
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Originally Posted by ChrisRX8PR

p.s....she runs....

no teasing - want more info !!!!!
Old 06-28-2009, 05:44 PM
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brilliant cant wait see and hear...
Old 06-28-2009, 05:49 PM
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Holy crap guys!...chill...she runs but I have some bugs to work out...
she has a small fuel leak probably from a pinched injector o ring and the tune I had barely allows it to start up and run....

I have lots of work to do to it before I can record an idle for you guys...

I'll keep you posted...

I did get to hear the "brap brap brap"for a little bit though..before I noticed the leak...

whowhooot!

Chris

p.s. believe me...you don't want to see/hear it more than me :D
Old 06-28-2009, 10:47 PM
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Originally Posted by Easy_E1
My only concern would be the Apex end wedge as it passes the bridge port. Removing the rotor housing material to accommodate the ported plate has made an area where the only spot holding it in is the actual bridge between the ports.
Unless of course you put the apex in so that the wedge is on the center cast iron plate. Of course this is only relevant with the rear plate due to the assembly process.
Bingo. This is one reason why it's a partial bridge and not a full bridge: apex seal integrity. The factory Mazda 2pc 2mm seal's corner piece would wind up wedging into that corner. So, the flat edge of the seal has be used on the bridgeport side.

B


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