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Mazda RX-7

How many hp a s4 na raceport /aux bridge have ? Stock ecu,stock injectors, upgraded fuel pump

How many hp a s4 na raceport /aux bridge have ? Stock ecu,stock injectors, upgraded fuel pump

Pierluc

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49 Answers

Charles

I can’t tag them idk if they left the group. Victor eng

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Kyle

@Victor

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Victor

Not aux bridge and not a 2nd gen. But I’d guess 165-170whp range

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Victor

Supporting mods and tuning plays a huge roll in those numbers

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PierlucQuestion author

Thought it would be like 180maybe 190 with some mods

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Victor

Not with stock ecu/intake exhaust

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PierlucQuestion author

Exhaust is straight 2in

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PierlucQuestion author

T2 stock has 180whp ?

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Victor

I made 158whp with a stock first gen ecu two injectors only. Race port with bridged primary port only

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Victor

S5 block TII housings

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PierlucQuestion author

Ill prob ask mike to built one

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Victor

No photo description available.
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Victor

Mike ported this engine

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Victor

I’m aiming for 200+ now with aftermarket ecu and itb’s

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Victor

What are you trying to do with it?

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Victor

My goal is 200+ whp under 9000rpm and board power band. Coupled with 4.77 gear, TII trans and a 150shot of nitrous. Dip into the 11’s maybe, nice street car.

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Victor

Changing the exhaust to racing beat dual with a revised header. Broadens the power range instead of a big single making a peaky power curve.

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PierlucQuestion author

Nice plans ! I want to have around 180whp and go faster than t2 stock.. and make this car semi daily and occasionnal drift/lapping events

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PierlucQuestion author

Later adaptronic and stuff.. but atm i need a good suspension , wheels, handbrake and engine

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PierlucQuestion author

Clutch kit too

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Victor

Very doable, but you’ll need proper tuning/exhaust to make enough power to hold a drift. Keep the tires around a 205, and gut the car.

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Anthony

@Victor you runnin the kia sportage 4.7?

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Victor

Was, back to 4.10 stock. Going back to it later

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Anthony

I ment with the setup mentioned above, youll be running kia sportage 4.77? On the fc?
What needs to be done for that to bolt up?

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Victor

FB

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Erick

That power curve is sexy as fuck sounds like a fun car

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Tyler

Stock shit is going to kill you, I ran a microtech, walboro 255 and GSLSE injectors (720cc) as my secondaries. With stock injectors all around the car flashed stupid lean around 4500.. changed the injectors and the car came the fuck alive lol.. I had a half bridge motor with stock S4 intake, probably put down about 200, maybe 210, but never dynoed it.. My aux ports were ported, but only the primaries were bridged

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PierlucQuestion author

Ill buy the engine from mike then ill built it in the garage and ride my fc stock and drift it a bit then pull the 13b when my set up will be ready :p

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Roy

I highly doubt you will see 170whp on just a big street port snd race port exhaust on stock ecu/intake. Victor is running a half bridgeport and reached 170whp however his plenum style intake robbed the most of his power. Bridgeports do not perform well with plenums, need at least one throttle body per rotor (itb, weber, 4 barrel) for a bridgeport to make power.

On that note Tyler @Tyler I highly doubt you were anywhere near 200whp but i so not doubt it us/was quick! Heres the sad part, a stock port 6 port can see 170-180whp with a proper tune so standalone ecu or tuned carburetor with properly tuned exhaust. But once you go porting you not going to see much of an increase on a stock ecu. The factory intake doesn’t flow great.

I have been around this for too long watching too many builds and looking at too many dyno slips.

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Roy

@Anthony the fc diff rear cover swaps on to the kia short nose diff. Just need a custom bracket for the front diff mount and a longer drive shaft

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Roy

Also, aux bridge only causes turbulence and restricts flow. This was flow tested by sir AaronCake years years ago. On boost, it works but not na

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Victor

Best to leave secondary ports and aux alone, just port them slightly

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PierlucQuestion author

I think the engine is already ported … mike dont answer but w/e

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Victor

He has a life besides angelmotorsports just shoot them a email

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PierlucQuestion author

Lol ik ill wait anyway if i take it i pick it during the event

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Benjamin

I made 165whp on a dynojet with a mild streetport, RB header, RB presilencer, 2.5in single exhaust to 2.25in strait through muffler. atkins 5th/6th port sleeves, and turbo exhaust sleeves (no baffles).

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Benjamin

With mild tuning with an apexi neo, a little higher flowing exhaust, some ducting to improve cold air feed, and fresh spark plugs, I’m sure I could easily make 170wheel

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Benjamin

s4 block and rotors

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PierlucQuestion author

Worth it or na ?

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Victor

In a light car yes, you’ll notice that more than anything.

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PierlucQuestion author

We’ll see i still have few months to decide and it depends on taxes returns !

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PierlucQuestion author

Cuz i have to pick the motor in june during the event + 30hours gas and sht haha

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Victor

Tuning plays a big part. My timing was way off and I’m only running two injectors. Only had a few hundred miles on rebuild at that time. Before I did the haltech ecu I picked up a couple more hp. I’ll see what it makes later on 🙂

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PierlucQuestion author

Yeah .. but ecu and a good tune is another 2k

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Victor

I have a apexi neo piggy back if you just want to dial afr’s in, it helps

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PierlucQuestion author

If see what ill do .. still have to think if i go for the motor first or suspension/wheels/clutch/stuff before i go with motor

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PierlucQuestion author

I got a piggy back fd3s with harness for fc from japan hks f con v pro lol was on my jdm fc t2 but i heard bad things about them , plus i don’t have the hks pass to get into the ecu

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Victor

Yeah pretty much garbage lol

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PierlucQuestion author

Yep haha

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