I'm going to be rebuilding my motor soon and I'm 90% sure I want a half bridge ported motor.

I was wondering how many 3rd gen owners have a 1/2 bridge and how u like it?

I'm going to be rebuilding and porting the motor my self. So any info that you have would be great. Links ect....

The car is going to be streeted but not a daily driver.

 

that would be me....be prepared to spend a lot of time/money on tuning

and its not for the street...stop and go traffic, etc...

car drives like crap until it is warm

 

and as far as having the port work done, i highly recommend either steve kan @ gotham racing, or brian cain (BDC on forums)

 

one of the guys at my mechanic's shop has a half bridge big single. it actually idles quite well. somewhat lumpy, but consistent. as far as power, he's got plenty.

plan on spending lots of time tuning.

 

I was also considering this. The only thing I really know is that idle gets lumpy...I kinda like that sound...Your powerband gets shifted upward in the rpm range...and of course you get shitty gas mileage..But then again who cares about gas mileage. Would like to hear the opinions of everyone on this.

 

i'm kinda wanting to do the same on my next motor. i've got a pretty large street port right now. any certain things that should be taken into consideration? the fuel mileage isn't so important. what kind of miles are people getting out of them? i know life is taken down a little due to the extra port

 

i got 24mpg on the highway once...i don't even keep track of city mileage

 

My idle isn't lumpy enough for ya, big Dave ? Just ask Genghis to replicate my ports

 

You know, I talked to Genghis about it and he said it's not the porting that makes that sound but the tuning...Said he could replicate that brap brap brap sound on my existing ports. Interesting.

 

mmmm brap brap brap sexi sound

 

be prepared to have your car rock back and forth at red lights, and people will stare...

some will tell you your car needs a tune up, or it sounds like you lost a cylinder

 

Just turn to them and inform them your car is running on no cylinders and thats the cause of the noise.

 

 

I CANT WAIT! w000t

I'm going to rebuild it my self and port it my self..... any links on where to do the porting? and any good templates?

i want my bridge to be a thick bridge so it will last longer....

3 weeks i will be rebuilding it! ill get vids :_

 

as much as i support the DIY attitude, send the porting off to a pro...it takes a lot of guesswork out of the final equation

 

nice fat bridge, compliments of steve kan

 

Take what I say w/ a grain of salt, cuz none of this is 1st hand info (I don't have a bridgeport myself). But I did my fair bit of research about it, since I was contemplating going that route.

Bridgeported engines:
- definitely have a much higher "idle" if you can even call it that
- have very short life span...I've heard estimates in the range of 30-50K miles only. Seriously
- have almost no low end power...be prepared to crall until higher rpms
- are practically unstreetable. I've been told that the waterpump on the bridgeported engines is running so slow it's basically not working (ie extremely inefficient) at lower rpms, and thus can give you problems if you spend a lot of time at low rpms (stop & go, traffic, etc). It's made for WOT pretty much.

If some of this is wrong, please feel free to correct me, but that's the info I got from many sources...and based on it I decided not to go w/ even a half bridgeport.

 

you're wrong, on all of it

1st, it idles higher because it has NO vaccum, this is required for the engine to run, so yes, it does idle higher, but we're talking 1300rpms on my car for example

2nd, life span is totally dependant on how the port is cut

3rd, no low end power? ask anyone who has ridden in my car, it is not lacking in any area required for streetability

4th, the water pump issue is with race engins, designed for 8k+ all the time, that's old school info

we're talking HALF bridge port, meaning only the secondary runners are bridge'd, you're talking full bridge, which is diff

 

Go with Steve Kan if you're going to do any porting work.

 

he's priced very fairly, does great work, quick turnaround, and he can TUNE it too...

 

LOL...wrong on ALL of it? I coulda sworn there was even a hint of truth possible in SOME of it?

Thanks for clearing it up though. So lemme ask you this...what exactly are the benefits and downsides to a half bridgeport??

I don't care about gas mileage or higher idle....and you said low end power is good? So what are the downsides? How's engine life? etc?

Thanks
~Ramy

 

93BlackFD U OWNED FDNewbie LOL!

I would really like to port the motor my self, but if u guys think that its going too hard to port my self then about how much is it going to cost to be ported?

i have done porting on my old 86 rx7 that i had that went fine i think that if iwere to take it slowly i bet that i could do it my self. PLUS i got a guy that lives by me that has done a 1/2 bridge port on his T2. (corbit) his ports look really good and he said that he would be glad to help me out

 

more power to you then

the low end power is simliar to a street port because i am mostly on my primaries at that point, and the secondaries (bridged) open when i hit boost....

and it's all throttle based, because that's how the throttle body works, it doens't care if you're at 5k or 9k, if you're partial throttle, you're on primaries, so you get good vaccum (10mmHg) and good throttle response

smash the gas and it's game over

 

Umm...no... I wasn't claiming anything. Merely repeating what I heard. You can almost call it validating. And 93BlackFD corrected me and informed me of what's up. That's why I put the disclaimer before what I said dorko.

Gosh...you kids on the forum. Such instigators...lol

 

oh come on now it was just in fun!

but i know how u feel i have done it also... heard something then got told that it was totaly diff.

im no dorko your the dorko jk