MR2@20PSI

iTrader: (1)

hey guys,
I have done a search and nothing that I'm looking for came up. Um looking for detailed descriptions in your bridged motors. NOT i know someone I know has.... Here is a run down of the motor I'm putting together. S5 with a pineapple racing 6port template that I added a Bridgeport to. With a rb large streetport. I'm undecided on the standalone ill be using. Stock injectors, and the emissions removed. If anyone can give me any info on what there motors made and maybe what mine could produce. I'm hoping for around 200-220.

-John

876portturbo

iTrader: (4)

I have a S4 BDC half-bridge with a large streetport on the primary port. Its a 3mm motor. I am running a Haltech and RB header/presilencer to the CS catback. I am going to the dyno next weekend, I am going to post the results. The stock manifold may be restrictive and all but my butt dyno is very happy

MR2@20PSI

iTrader: (1)

Sounds good man, preciate it

DriveFast7

iTrader: (1)

my 12a full J-bridge cut thru the water seal, Ianetti ceramics put 205 to the ground. 42mm chokes in dellorto with lake cities sidedraft, ISC stainless header and long primary exhaust. shorter primaries would = more hp but this will get you started. It's about 245 at the crank. Weber IDA would = more hp too.

GtoRx7

iTrader: (5)

can you post a dyno of that? I never get to see bridge port dyno graphs.

876portturbo

iTrader: (4)

Went up to the dyno today at Rotary Performance to see where I was at. I put down 179.4 HP and 139.5 torque. My AFRs were from 10.8 to 11.2, way too much fuel. I still need to get back to BDC to get the final tune, I just wanted to know where I was as a starting point. Once Brian starts tweaking on it, I think it will see 200 WHP, as did Chris at RP. I was really happy with that considering how rich I am and the stock manifolds. There is definately more fun to be unleashed, after I go see B again I will post some new results. It was my first dyno experience, what a blast

GoodfellaFD3S

iTrader: (213)

^^why not have chris tweak it? BDC is a great tuner, but so is Chris. My little bro made like 185 rwhp on his 12A half bridgie

876portturbo

iTrader: (4)

I totally agree about Chris, he builds and tunes all the cars that come in that shop. He is a super nice guy, made for a fun experience. I'm gonna have B finish it up, he knew it would need more done to it but we ran out of time. The air filter I bought was choking the car up that day, took us pulling it off to get the car to go, that wasted time.

876portturbo

iTrader: (4)

http://www.youtube.com/watch?v=JK0NQn4tDIw

vid of the run

Arvika

My latest built 6-port went on the dyno yesterday.
279.2 hp and 249 lbf.ft.
I don't know how much it would be in rwhp...
It's a BP with S5 centerplate and the sleeves taken out before porting the endplates.
The engine is placed in a LoCost with a weight of only 575kg (1267lb).

2a+RoN

My small half bridge REW motor put down 218 on a mustang. This is with 9.0:1 rotors though since it will ultimately be turbo'ed.

RotaMan99

I hope you can squeze out some more ponies. People put close to that down without porting on S5 engines.

KNONFS

iTrader: (14)

I think his intake manifold\tb is killing him.

Rx7_Nut13B

iTrader: (1)

Mine hasn't been dyno'ed yet, but it is a easy 500hp

peejay

But you have a turbo. Turbos, in a nutshell, suck.

Rx7_Nut13B

iTrader: (1)

I agree ^ sometimes. I didn't realize I was in the NA section

Anyhow, I have built a Full BP 13B engine for a local drag racer, it was dyno'ed at 270ish HP

876portturbo

iTrader: (4)

Stock S5 engines arent breaking up at low RPM/high load from 10 flat AFRs. Lots of tuning left, and the S5 manifold isnt purty like da S4

RotaMan99

S4 manifold is butt ugly. S5 manifold is so much nicer. I don't think the S5 manifold will work with B-Ports though. I wonder if using a t2 manifold will work better with a b-port than S4 manifolds?

rotarygod

iTrader: (1)

I wouldn't use ANY stock Mazda manifold with a bridgeport but that's just me and I sincerely hope under no circumstances whatsoever is anyone using a stock ecu and retaining an air flow meter. I'd rather see a stock manifold than a stock ecu though.

FWIW: It's possible to hit 200 rwhp on stock manifolds with a streetport and really good tuning via an aftermarket ecu (didn't say it was simple but possible) so you bp guys had better be topping that considerably. 2a+RoN's engine sounds like it performs as a bridgeport should. Even with low compression. That's basically everyone's mark to hit. Top 218 rwhp. If you can't break 200 rwhp, you should have just stayed with a streetport. Keep in mind I am talking about 13B engines.

peejay

I have "heard" here of 300hp bridgeport engines using stock TII intake manifolds, for a circle track class.

I personally don't like street ports much any more, too peaky. Although the drivability is nice

ultimatejay

iTrader: (1)

300 hp N/A? I'd like to see proof of this!

2a+RoN

Thanks! I completely agree as far as using stock intake manifold... I built one w/ 15" runners and large plenum and love the powerband for a street car. Very broad curve and peaks at 7500..

876portturbo

iTrader: (4)

One thing to keep in mind is that sometimes you go a certain way with a project just because you want to. Everyone knows that the NA stock manifolds are restrictive, no big news there. Unless you fab a custom manifold or go ITBs its the easiest way to roll. Its just a toy, and I like the BP noise. Now that I have installed a RB aluminum flywheel its really alot of fun. If you think about it a streetport could be better on stock manifolds because they dont have 4 eyebrows (1/2 BP not an aux) staying open jacking with the original port timing of the stock manifold. All of that being said, it all about what the individual person wants. I am enjoying the simplicity of an NA. Later I will strap on a reliability killer to get big HP. I have all the custom 6 port turbo stuff from my last setup, just need to get another turbo.

876portturbo

iTrader: (4)

You dont own a s5 do ya? People tend to be bias towards what they actually own. I thing the S5 manifold looks dreadful, but the VDI is sweet.

ultimatejay

iTrader: (1)

Who cares what it looks like if performance is what your after. What good is an engine if it looks nice but doesn't perform?