D4S Delete? I'm dead serious.

[suaveflooder]

Originally Posted by ft_sjo

Every manufacturer is going DI. It's the only way to get emissions down and remain competitive.

My comment was more around people ditching stuff like VANOS.

Agree with you 100%. Don't see a way around avoiding DI really

[DJCarbine]

Originally Posted by suaveflooder

Any examples of this? I'm part of M3 forums and came from an E46 M3. I've never heard of anyone ditching the VANOS. I'm actually interested. I love learning new things! :happy0180:

This. Any reason why you would ditch VANOS? Aftermarket cams maybe?

[Sportsguy83]

Originally Posted by TeamZleep

So, Shot in the dark, but I wonder if it's possible to make direct injector block-offs, remove the D4S, and run the FA20 as a port injection-only car. Flame suit on, but if the port injector sizing and tune are setup properly, I don't see why it wouldn't make the same amount of power, just with a small hit on MPG. I've just never been a fan of Direct Injection (I come from the VW world), and I'm curious if anyone has even attempted it.


Honestly, if a reputable shop wanted to take the plunge, I'd happily hand over my car for the better part of 6 months to see what can be done.

Edit: It was JDL not Ptuning as correct by @King Tut


Ptuning is developing their kit on E85 and use ONLY Port Injectors, did not want to use the DI system. Yes definitely it can be done. ('I'm pretty sure it's Ptuning, but it may have been other shop. Still, I am 100% sure there is someone developing a turbo kit and disregarding the DI system completely).

[King Tut]

Originally Posted by Sportsguy83

Ptuning is developing their kit on E85 and use ONLY Port Injectors, did not want to use the DI system. Yes definitely it can be done. ('I'm pretty sure it's Ptuning, but it may have been other shop. Still, I am 100% sure there is someone developing a turbo kit and disregarding the DI system completely).

It wasn't Ptuning, it was JDL. They were running 1000cc port injectors and an AEM EMS. Not sure if the car is back up and running after blowing the motor:

http://www.ft86club.com/forums/showthread.php?t=29975

[zooki]

I would have to think you'd run into detonation problems also without the "cooling" effect of DI. The stock piston just looks to have all kinds of sharp edges that could hotspot, and with cast 12.5:1 pistons and pump gas you don't have much room for error.

[SkAsphalt]

FA20 without D4S (i think) 123 hp in another subaru platform

[arghx7]

1. Sell your FT-86
2. Buy a used S2000
3. Profit

[Admiral Ballsy]

Originally Posted by SkAsphalt

FA20 without D4S (i think) 123 hp in another subaru platform

NA FA20 is BRZ/FRS only (JDM Legacy GTs have a turbo version). FB20 is used elsewhere; it's very different though - smaller bore/longer stroke, so not a horsepower engine (~145HP). Also, 10.5:1 I think, so it can use pump regular.

[EAGLE5]

Originally Posted by King Tut

It wasn't Ptuning, it was JDL. They were running 1000cc port injectors and an AEM EMS. Not sure if the car is back up and running after blowing the motor:

Is that last bit a reason to avoid port-injection only?

[EAGLE5]

Originally Posted by DJCarbine

This. Any reason why you would ditch VANOS? Aftermarket cams maybe?

From what I read, yes. If you're looking for a narrow but intense powerband, ditching VANOS and running aggressive cams can get it, I guess. Mainly, though, I think it's ditched because it's hard to deal with and control. That's the same reason some tuners early on her just going port. It made the job easier, especially with other tuning solutions than the standard two.

[mav1178]

You're better off swapping to a EJ20/25 motor than removing the D4S injection system. Save you more grief too.

-alex

[TeamZleep]

Originally Posted by suaveflooder

You track your car? If the answer is no, don't worry about it. If you do, keep the car 100% stock and take it in if there is an issue. Even CSG_Mike got his first motor replaced under warranty. Out of the tens of thousands of FRS's, BRZ's built....there are few with an issue.

I'm not saying it isn't an issue, just that you shouldn't worry about it. It's forum fever. It'll always look worse here.

Yes, but 99% autox and maybe an HPDE. As far as the motor goes, I'm not touching it other than the noise generator delete and drop in filter. The exhaust though... Basically header-back has been changed. That'll be it though.

I get the normal crackle from the exhaust and occasional backfire, but that's totally normal. Sometimes concern is raised, but for the most part, I really was just curious on the advantage/disadvantage of removing D4S.

If this puppy blows, I do have an EJ25 block... But at that point, things will get silly. Screw selling it, I LOVE this car.

[mad_sb]

Originally Posted by suaveflooder

I can get that. The engine is still REALLY new. I do remember reading that originally the numbers were even more pathetic than they are now without the DI. Could be complete hear say, but considering that there are quite a few companies going DI, there is no reason to ditch it IMHO. :happy0180:

from the stock dyno numbers i have seen, i don't even believe these engines make an honest 200 crank hp.

Pump gas with big turbo it might be super trick to re purpose the DI's to spray methanol or alcohol or ethanol while leaving the ports for the pump gas. E85 just keep the DI's and adjust the start of injection time to maximize cooling.

[Astroboy]

Settle for another car. Miata maybe