I recently bought a 94 fd and it has the following mods.... spec 99 turbos, greddy induction system(twin cones), greddy smic, downpipe, high flow cat, racing beat exhaust and a power fc and commander... this was dyno tuned at 13psi and made 304whp and 296 ft/lbs.... i want to make 360whp or so, so my question is.. whats next? i did some reading and everyone making 400 has a port but i dont really have the money for that right now... could i just get a boost controller and up the boost to 15-16psi and get bigger injectors and let the tuner do work? lol... or are there any other bolt on mods i should do as well? thanks for any info

 

At what psi is the car making 304? upgrade old vacuum hoses...

 

That torque seems rather high for the power.

 

Upgrade your fueling system.

 

Drive the car for a while and enjoy it as is!!!

 

Best advice.

 

You don't have many options at this point.

1. Swap the high flow cat for a straight pipe
2. Upgrade fuel system
3. Increase boost

If you do that, and you get a very aggressive tune, then you might be able to hit 360whp. But I doubt it, you'll probably see around 340-350whp. It's hard to make more power than that on stock ports with twins

 

you'll need to address the ignition.

i dont see anything about ignition, at a minimum you should get a twin power. that will help with getting the most out of your current setup, and will also help when turning up the boost and increase throttle response a bit.

as far as that, like some have already said; vacuum hoses(if not already done), replace cat for midpipe/straight pipe and upgrade fuel system.

you'll be able to raise boost to around 15-16psi but on the stock twins thats about the limit of their efficiency range. some have pushed them way past that, but then those turbos destroy themselves after a short while.

you'll be able to get a healthy 350hp on an unported motor which is about it. after that, you'll have to look into either BNR stage 3, single turbo and/or rebuild and port the motor.


but like others have said..... keep it the way it is now and enjoy it.

once you get rid of the seq operation of the twins or ditch the twins completely, you'll miss the surge of power they give you

 

you got lucky to buy the car with 99twins. i would say just enjoy the car as is. a properly functioning fd is fun as hell to drive, even when its stock. The problem with the car is that things usually start going wrong once people mod them. unless your used to high hp cars (500+) then i dont see the big reason to reach a special number. downtime sucks, especially when you could be enjoying the car instead of working on it. its different when something breaks and needs to be replaced. thats the best reason to upgrade.

Anyways, once you start wanting more power I would do a bigger fuel pump, injectors, twin power, aux injection and run the boost around 15 or so. If you dont have to deal with emissions then go ahead and get a straight pipe and a pulley kit so you can loose the airpump. then once you make a few changes get a tune so the car is happy.

 

What kind of dyno did you use?

 

I have to disagree, IMO adding a twinpower for what he wants is unnecessary.

I'd just do the upgrades, run the car, and then if you experience break up under heavy loads, then go out and get a twinpower.

 

yea i forgot to put in there im pretty sure it has an aftermarket fuel pump and bigger injectors not sure what size ill have to look at all the paperwork... and Supernaut, the 304whp was made on a dynojet at KDR performance...thats where the previous owner took it to do everything... ill go over the vacuum lines and look into the twinpower... im not too familiar with the power fc but can you adjust the boost using that or do i need a boost controller?

 

Leave it alone until something goes wrong. a 300whp FD is a 12 second car already. It should be hanging with E92 M3's.

 

Ahhh. What's the peak injection duty?

 

ill take it for a drive later and let you know

 

wow they are maxed... 95%... isnt like 76% what you want? i need to figure out what size they are and upgrade

 

Even though the generic conventional wisdom maximum duty for injectors is 85% (don't know where you got 76%), many have run for years at 95% on FDs with no issues.

A 300 whp FD is a very fast car. Another ~40whp is all you are going to realistically get from those twins (despite the faint aura around them, '99 twins are barely different from stock) - and it will cost you in terms of money and reliability.

 

depending on your budget, 360 whp could be made rather cheap, or expensive but reliable, also depends which dyno you want to achieve 360 on.
cheap would be to remove all EGR, get bigger 2ndaries, bigger fuel pump, twin power, turn up the boost and tune
expensive would be to go single

 

At 95% duty cycle and pushing 304hp......i would guess they are stock injectors

 

95% will be fine unless you are doing some hardcore tracking or something. they are side feeds injectors so the fuel flows through the body to cool the solenoid and valve inside.

 

same here, get used to the power, & keep it reliable with the temps. While your enjoying it, decide (with some time) whether you wanna port, upgrade the fuel system, upgrade the turbo, & the clutch

 

*Know that if you increase boost enough to hit your hp goal then you'll really need a bigger IC and/or AI for the heat, which requires more money.

*You'll also reduce the life expectancy of the turbos...which are pricey too.

*As mentioned above, it will require "an agressive tune" to meet the goal on stock ports, meaning you'll be out there near the edge where bad things can happen. If you don't have the money now......
^Agreed. Don't know about 12 seconds...but it will hang with an E92 M3.

 

I figured it would be pretty high. I wouldn't boost past 12psi. If you want more power, get rid of emissions and buy water injection (besides the boost safe guards you will need). I wouldn't go anywhere past that with the 99 spec twins. I do think you have a bit more room with your car.

 

If you at 95 % in this heat be careful when it gets cold out... You will run out of room to compensate for the increase in air density.

 

looks like its the stock fuel pump and 550 primaries and 850 secondaries... are those stock injectors? what would you guys recommend for fuel upgrades?