[tagon]

Ok, I have an 335is and i was thinking of how i could have good gains without using a piggyback or reflash? I don't know this makes any sense but i was just thinking how i could increase power using the stock tune of the 335is?

[Alchem]

Stock tune does not adjust to mods like the Procede does. So you can add mods and get slight gains but not as much with as with an aftermarket tune.

[enrita]

you need to up the boost to get more power. i only got 20 whp with IC, DCI and catless downpipes. Just get a procede or a GIAC flash.

[k726]

Had my car with intake and dps. I had taken the tune out for a while. The car was a slug without it. Just get a procede. Don't even worry about bolt ons. They aren't necessary if you just want solid power and some nice features.

[vase330]

He asked what the dividends were if he didn't use flash or piggyback: Well your car will last longer. Maybe he is planning on handing it down to the future grand kids?

[blacknbean]

full catless turbo back exhaust

[tscdennab]

Many people on this forum rush to say "get a tune". But for a long time I searched ways to increase power without a tune.

In my experience, catless downpipes will greatly increase the stock power. I felt a bigger bump in power after I installed catless downpipes than when I installed the Power Kit. A Helene drop-in air filter brought me an additional 4whp on a back-to-back dyno on the same dyno session. I am sure a bigger intercooler will also help a 335is.

[michaelthepsycho]

Intake, exhaust, downpipes, limited-slip differential (power to the ground), intercooler.

[enrita]

Originally Posted by tscdennab

Many people on this forum rush to say "get a tune". But for a long time I searched ways to increase power without a tune.

In my experience, catless downpipes will greatly increase the stock power. I felt a bigger bump in power after I installed catless downpipes than when I installed the Power Kit. A Helene drop-in air filter brought me an additional 4whp on a back-to-back dyno on the same dyno session. I am sure a bigger intercooler will also help a 335is.

yes you get 20 whp with catless dps, DCI, IC at 8 psi boost.
This has been proved by many people here and myself.

[tagon]

yeah my grand kids! specially since they said that the care is collectible.haha. isn't the 335is doin 11psi with 14psi during overboost. My thing is making the engine/turbo work harder wouldn't help with longevity, i like this car and am thinking of keeping it for a while and wouldn't mind the extra power but obtaining it through better breathing. thanks for the responses guys

[enrita]

Originally Posted by tagon

yeah my grand kids! specially since they said that the care is collectible.haha. isn't the 335is doin 11psi with 14psi during overboost. My thing is making the engine/turbo work harder wouldn't help with longevity, i like this car and am thinking of keeping it for a while and wouldn't mind the extra power but obtaining it through better breathing. thanks for the responses guys

Than i would suggest to get a nice FMIC, catted downpipes and a nice intake like injen for example or just a better dropin filter.

[SilverII]

weight loss...

[tagon]

its a little difficult to lose weight considering the heavy ass convertible top.

[tagon]

Originally Posted by enrita

Than i would suggest to get a nice FMIC, catted downpipes and a nice intake like injen for example or just a better dropin filter.

you think injen would be best? how about the afe cold air intake?

[Penn999]

Originally Posted by tagon

you think injen would be best? how about the afe cold air intake?

dont go by what the manufacturer claims, its bullshit. I can sell you a used one if you would like lol. the heat shield does nothing for colder IAT's. Get a fmic and downpipes. Those are the biggest gains outside of a tune. If you want to get intakes just get the dci from bms, but you wont really reap the benefits of the increased volume of air unless you get a tune. Just noise....if any thing you might lose a couple of HP from higher IAT's. Unless you are getting a tune, just get a helene filter for your stock airbox.

[tagon]

do you know if any of the sponsors carry the Helene?

[luca335i]

Your wasting your money on bolt ons without a tune IMO. A tune at 13 psi with good fuel shouldn't create any longterm issues, especially if your not WOT all the time. My 07 335 with 135000 kms and many other high mileage n54s never really experienced any major issues from having a tune. If your looking for 3330-350 whp you should be fine. If your doing labour intensive work like installing dps you might as well get a tune. The bolt ons allow your turbos to work less when upping the boost. Plus a few more ponies should make up for that heavy top you have.

[Penn999]

Originally Posted by tagon

do you know if any of the sponsors carry the Helene?

http://www.eurosportdesign.com/p-237...l-filters.aspx

[Penn999]

Originally Posted by luca335i

Your wasting your money on bolt ons without a tune IMO. A tune at 13 psi with good fuel shouldn't create any longterm issues, especially if your not WOT all the time. My 07 335 with 135000 kms and many other high mileage n54s never really experienced any major issues from having a tune. If your looking for 3330-350 whp you should be fine. If your doing labour intensive work like installing dps you might as well get a tune. The bolt ons allow your turbos to work less when upping the boost. Plus a few more ponies should make up for that heavy top you have.

He said he didnt want a tune, we already recommended one. That is not his goal ATM. He was asking for the most power efficient bolts ons

[tagon]

Originally Posted by Penn999

http://www.eurosportdesign.com/p-237...l-filters.aspx

thanks for the link Penn. and thanks to everyone for the input.

[vasillalov]

Well there are definitely mods that you can do to improve your car. It all depends on your definition of what "improving" means.

There are mods you can do to improve cornering and overall handling of the car on the track. A car with stock tune but with well sorted out suspension and brakes will do quite well on the track and often easily beat more powerful cars.

Another approach would be to go for fuel efficiency mods.

In any case, there are mods you can do that will always help:

* Intercooler
* Downpipes + Exhaust
* Intake

One feedback that I'd give you concerning the downpipes and the exhaust:

Catless downpipes will help your turbos spool sooner and will overall reduce the stress on them. Unfortunately, if you go completely catless with no tune (I ran that setup for 4-5 months) your ECU will constantly overshoot its boost targets and you will actually feel it cutting back on the power.

So if you are to install downpipes and exhaust, I strongly recommend keeping at least one set of cats. That way you still get the benefit of the improved flow but your ECU won't be cutting on the boost too quickly...

[bulldog_yyc]

mods dont pay dividends, they take them

Fail thread - there is no logic to bolt ons only. In fact, tune only makes more sense as its easy to remove vs. DP, intercooler which are more labor intensive. OP don't even bother modding your car.