2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Bridgeporting a TII motor

Thread Tools
 
Search this Thread
 
Old Apr 9, 2003 | 11:02 PM
  #1  
85TIIDEVIL's Avatar
Thread Starter
ALLROTOR
Tenured Member: 20 Years
Liked
Loved
iTrader: (2)
 
Joined: Sep 2002
Posts: 1,863
Likes: 7
From: Oceanside, NY.
Question Bridgeporting a TII motor

Does anyone know if you can benefit from bridgeporting a 87T motor utilizing all the stock components, such as the turbo, ECU, etc...???

What's the difference between a bridgeport, Jbridge, and a half bridge...???? THANKS.
Reply
Old Apr 9, 2003 | 11:05 PM
  #2  
rotary>piston's Avatar
Rotary Enthusiast
Tenured Member 05 Years
 
Joined: Jan 2003
Posts: 873
Likes: 1
From: Boulder, CO
I'm not real knowedgeable about turbo effects, but it would seem like you would get a ton of power, and power requires support. You might have to go aftermarket on your ECU.
Reply
Old Apr 9, 2003 | 11:15 PM
  #3  
13bpower's Avatar
s4 for life
Tenured Member 15 Years
 
Joined: May 2002
Posts: 2,516
Likes: 1
From: Oahu
Seems like you could get that power from boost. The more drastic porting like that causes engine life to be VERY short from what I have read. Hypathetially it could work... I think.... Im not an expert though. I would Spend that money on turbo stuff to run at 15 psi and have the engine last alot longer. 2 each his own though.
Reply
Old Apr 9, 2003 | 11:29 PM
  #4  
bl|nk's Avatar
Fok mi
Tenured Member 10 Years
 
Joined: Sep 2002
Posts: 892
Likes: 0
From: Sioux Falls, SD
have to remember before you throw the engine logevity into the scenero is that bridgeporting isn't exactly you every day port. People usually do it for the power.. the air flow right? so obviously these people are pushing on the motor more.. of course an engine isn't going to last as long if you're pushing the motor like that..
Reply
Old Apr 10, 2003 | 09:24 AM
  #5  
Ryde _Or_Die's Avatar
...
Tenured Member 10 Years
 
Joined: Aug 2001
Posts: 7,539
Likes: 0
From: Tampa, FL
JUst remember bridgeports are LOUD. They get their power from a very open intake and exhaust, which will in turn raise your boost dramatically. Thus, you won't be stock and will need fuel to support it along with a ported to hell wastegate to keep boost under as much control as you can.
Reply
Old Apr 10, 2003 | 09:44 AM
  #6  
eViLRotor's Avatar
Brother of the Rotary
Tenured Member: 20 Years
iTrader: (2)
 
Joined: Jun 2001
Posts: 5,781
Likes: 2
From: Arkham Asylum
Stock turbo is much too puny for a full-BP engine. You'de be clearing up one restriction (small ports) only to be hitting another.

Half-Bridge: BP of the secondaries.

Full-Bridge: both prim/sec.

J-Bridge: The 'eyebrow' port is extended into the rotor housing, giving a really large port, but requires cutting of the water O-ring.
Reply
Old Apr 10, 2003 | 09:55 AM
  #7  
CrackHeadMel's Avatar
Learned alot | Alot to go
Tenured Member 20 Years
iTrader: (2)
 
Joined: Apr 2002
Posts: 4,232
Likes: 0
From: Rotaryland, New Hampshire
J-Bridge also requires modifying the rotor housings too i belive
Reply
Old Apr 10, 2003 | 10:54 AM
  #8  
BDC's Avatar
BDC
BDC Motorsports
Tenured Member 10 Years
 
Joined: Jun 2002
Posts: 3,667
Likes: 6
From: Grand Prairie, TX
If you're still running stock EFI and stock turbo, etc., you don't want to even think about bridgeporting. That's more when you're at the bleeding edge of trying to eek out more HP and torque from an already existingly-heavily modified system.

B
Reply
Old Apr 10, 2003 | 11:58 AM
  #9  
RONIN's Avatar
Junior Member
Tenured Member 05 Years
 
Joined: Apr 2003
Posts: 32
Likes: 0
From: Bloomington, Illinois
any pics of this process being done?
Reply
Old Apr 10, 2003 | 04:50 PM
  #10  
85TIIDEVIL's Avatar
Thread Starter
ALLROTOR
Tenured Member: 20 Years
Liked
Loved
iTrader: (2)
 
Joined: Sep 2002
Posts: 1,863
Likes: 7
From: Oceanside, NY.
I've did some research over the past few days... And I've come to the conclusion that I'm going to go with a nice size street port. I have two complete motors to play with. One is together, stock and in the car. The other is in pieces all over my kitchen floor.

I'm willing to upgrade whatever is necessary after the foundation/motor is built.

I was told ANY bridge port will make power at high rpm's. And alot of EXTRA things have to be done inside the motor to run over 8.5K hard.

I'll build the streetport, put the motor in the car, work out any bugs and upgrades, and pull the motor that's in there now to be done better with whatever experience I learn from this one.

Sorry, no interesting pics. Just a plain old TII motor in peices. I did send my plates to RacingBeat to be lapped, and I have before and after pics if anyones interested.
Reply
Old Apr 10, 2003 | 05:32 PM
  #11  
Ryde _Or_Die's Avatar
...
Tenured Member 10 Years
 
Joined: Aug 2001
Posts: 7,539
Likes: 0
From: Tampa, FL
Originally posted by 85TIIDEVIL
The other is in pieces all over my kitchen floor.
Talk about being diehard There must be no Mrs.
Reply
Old Apr 10, 2003 | 08:44 PM
  #12  
ForsakenRX7's Avatar
zoom zoom go boom
Tenured Member 10 Years
 
Joined: Oct 2001
Posts: 962
Likes: 1
From: Gainesville, Fl
No kidding. If my wife walked in to the kitchen to a ripped apart rotary engine, I'd never hear the end of it. Ugh, I dont want to even think about it actually.
Reply
Old Apr 11, 2003 | 07:09 AM
  #13  
CrackHeadMel's Avatar
Learned alot | Alot to go
Tenured Member 20 Years
iTrader: (2)
 
Joined: Apr 2002
Posts: 4,232
Likes: 0
From: Rotaryland, New Hampshire
My gf's mom came home one day when me and my gf were cleaning the rotors and rotor housings in her living room. That didnt go over to well. 3 weeks later her house still smells like parts cleaner
Reply
Old Apr 11, 2003 | 07:52 AM
  #14  
Crionics's Avatar
Senior Member
Tenured Member 10 Years
 
Joined: Sep 2001
Posts: 486
Likes: 0
From: KY
lol...sounds like you got a good girl there...I could picture my gf's face if I asked her to help me tear down an engine
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
schaft
Time Slips and Dyno
3
Sep 9, 2015 02:02 PM
Engine stand ready
New Member RX-7 Technical
3
Aug 14, 2015 10:26 PM
KAL797
Test Area 51
0
Aug 11, 2015 03:47 PM




All times are GMT -5. The time now is 12:51 AM.