REHarrison

So I have decided to build another FC RX7 but I want to do an NA.

My plan is to get a 86-91 NA FC and run a bridgeport with it. It will be a full bridgeport with individual throttle bodies tuned with a Greddy e-manage.

My question is, would the tranny be able to hold up all that power, which i believe should be around 200 to the flywheel? I do plan to autocross it.

Also what Individual Throttle Bodies can be recommended?

Thanks.

PinkRacer

We have a full bridgeport N/A and it's more than 200 at the flywheel, and ours is carb'd. We run a stock tranny and it's fine.

If you plan on driving it on the street at all, a full bridgeport is almost un-driveable because it hates constant throttle and low speeds. However, it works really well at acceleration and deceleration. Ours is strictly a race car with no street driving, and even driving into pit lane is a bitch with a bridgeport.

Just a word of warning.

87FCna

iTrader: (3)

ya same here, i wanted to do a bridgeport on my 87 na also, but my na would be a street driving car, thanks for the info. also what about the stage 3 race port?

http://www.speedmachineperformance.c...lts.asp?Cat=26

also do you know where i can get my tranny and lsd rebuild?

PvillKnight7

iTrader: (16)

TII tranny will get it done

Aaron Cake

iTrader: (1)

I don't think that will work. The E-Manage relies on the stock ECU, which needs to see the AFM. Could be wrong though.

No problem.

48MM if you are going to fab it yourself, or a TweakIT kit if you are going to purchase.

DefYet

Im looking at buying a n/a FC with (what we call in NZ) a monster bridgeport, meaning its almost a Jport, will let you know how they go/how drivable it is round town if i get it.
Should definatly build one, little bit different to what everyone else is doing

84stock

iTrader: (5)

How about turning your 6 port into a Ukranian bridgeport.

RotaMan99

Can't see those tiny hole doing much of anything. A LOT of resistance in the airflow there. Usless porting and drilling.

Aaron Cake

iTrader: (1)

Most people don't J-port because it's extremely unreliable. It's safe to say that most people expect their engines to last more then 5,000 miles.

DefYet

Its not a 6 port, its a 13b turbo block with high compression rota's and runs a 51mm IDA carby set up. And no with the ukranian setup haha, im hoping that is just the start of whats going to be a bridge port and they dont run it with those holes

DefYet

Sorry for the confusion, i meant build a n/a bridgeport FC.
I agree with you tho, J-ports are very unreliable!!

TehMonkay

iTrader: (-1)

how much does an NA bridge usually make anyway?

there is someone here who is driving a bridge everyday, well, before it blew up, i imagine it'd run alot better with a haltec than with a carb setup.

micah

Half-bridge NA?

villin

WTF!? is that the primary and secondary with the divider cut out?

anewconvert

iTrader: (1)

secondary and aux ports you mean? yes, it is



BC

Latin270

I ran a carbed s5 n/a in my FB w/ no issues other than it ran like a bat outta hell! Now I'm dropping a carbed street ported s5 n/a. It will be interesting to see the difference in power.

villin

thats what i meant but thank you.

CarzArKoo1

half bridge cost less than full bridge? anyone know about the output of HP that base on these port. like ranges that street port, race port and bridge port. thanks

Aaron Cake

iTrader: (1)

For a proper bridgeport (full bridge) NA then you're looking 250-275 RWHP with a decent setup. Keep in mind that means the exhaust will be loud.

I drive mine between 2 and 7 days a week, depending if I feel like visiting the gas pumps every 3 days or not.

A full bridge requires more porting time, so in theory it will cost a bit more. Also if your cuts are large then you need to go with a 1 piece apex seal that requires clearancing.

You'll make 200 RWHP on a street port NA if you are lucky.

DefYet

Aaron Cake, are you able to post up some photos of your 7, interested to see what it looks like/the set up your running.

Aaron Cake

iTrader: (1)

OK...







But my car has a small turbo...

http://www.youtube.com/watch?v=nE4_BEgrKrc
http://www.youtube.com/watch?v=UOPXWf7_LQ8

rglbegl

I am bumping this thread for 2 reasons

1. ^^^^ That is a beautiful engine bay that deserves a bump

2. Got a bridgeport question
Will a stock intake/throttlebody work for a bridgeport?
Or will the engine be too choked up/restricted?
Does it need ITB's?

Assuming everything else is taken care of - injectors, computer, exhaust . . . . will the stock intake flow good enough to keep a bridgy happy?

Aaron Cake

iTrader: (1)

Turbo or NA? Big difference in the two intake manifolds.

The throttle body will flow enough for any NA application. Mazda used virtually the same throttle body on the FD, 20B, etc.