[CarAbuser]

Don't bother with JB4 or DCI.

Start with MHD then add an intercooler and downpipes. Downpipes add an extra 20hp and increase the spool speed, well worth doing.

[Silent9n54]

Originally Posted by CarAbuser

Don't bother with JB4 or DCI.

Start with MHD then add an intercooler and downpipes. Downpipes add an extra 20hp and increase the spool speed, well worth doing.

dci is 90$

dont bother ??

[ragingpanda]

Waste of 90 dollars, better to put that money towards inlets.

[TheMidnightNarwhal]

Originally Posted by Silent11N54

dci is 90$

dont bother ??

Originally Posted by ragingpanda

Waste of 90 dollars, better to put that money towards inlets.

I disagree. While stock intake is fine for MHD the DCI will give you nice air intake noises and also make it easier/quicker to work in the engine bay IMO and they look good. For 90$ it's a great buy.

As for inlets, if you do inlets without a custom tune pretty sure there is no point, they won't benefit on OTS Stage maps.

[Silent9n54]

Originally Posted by ragingpanda

Waste of 90 dollars, better to put that money towards inlets.

you do know you can install dci in 10 mins and inlets will take u 8 hours lol

and if you are looking to make 400 hp you will definitely need the extra air flow that dci provides

[NoGuru]

Originally Posted by Silent11N54

you do know you can install dci in 10 mins and inlets will take u 8 hours lol

and if you are looking to make 400 hp you will definitely need the extra air flow that dci provides

Took me about 16 hours to install relocation inlets. And I would say I am a decent home mechanic.

I would say it is better to have the DCI then not. You might loose a couple HP but just having access to most of the engine bay is worth it.
+Sound and looks.

[type-dRew]

I've seen so much data that supports DCI that its hard to fault, but once the weather turned warm my car felt sluggish even with the cowl deleted. When I put my cowl back on it got worse. So I installed stock airbox again and it felt better.

When I went to the track a few weeks ago I ran all day with stock air box. I took the airbox out and did two passes with open inlets. I lost 3mph(and .4 at best with same 60ft) in the 1/4 with open inlets vs stock air box back to back. Even with a cool down and I had also removed the cowl that day for good measure.

I'd say inlets or stock, dci is for noise only in my experience.

[Silent9n54]

Originally Posted by type-dRew

I've seen so much data that supports DCI that its hard to fault, but once the weather turned warm my car felt sluggish even with the cowl deleted. When I put my cowl back on it got worse. So I installed stock airbox again and it felt better.

When I went to the track a few weeks ago I ran all day with stock air box. I took the airbox out and did two passes with open inlets. I lost 3mph(and .4 at best with same 60ft) in the 1/4 with open inlets vs stock air box back to back. Even with a cool down and I had also removed the cowl that day for good measure.

I'd say inlets or stock, dci is for noise only in my experience.

i was told by ken that even though you are getting more hot air in with the dci anything past 400 whp is a must because you need the extra air flow that dci provides over the stock box

[CarAbuser]

Originally Posted by Silent11N54

i was told by ken that even though you are getting more hot air in with the dci anything past 400 whp is a must because you need the extra air flow that dci provides over the stock box

I've not seen any solid data that supports the DCIs. The only people who push them are the people that sell or make them and even then they only claim something miniscule like a 2hp gain.

IMO they are a ricer mod. No added performance, just makes the engine bay look like it's been butchered.

[Silent9n54]

Originally Posted by CarAbuser

I've not seen any solid data that supports the DCIs. The only people who push them are the people that sell or make them and even then they only claim something miniscule like a 2hp gain.

IMO they are a ricer mod. No added performance, just makes the engine bay look like it's been butchered.

person who recommended them is a tuner not a seller, i can go and buy them on ebay , its not like he is making money off my purchase. Everyone has their own opinion .

[hellokitty]

Originally Posted by CarAbuser

I've not seen any solid data that supports the DCIs. The only people who push them are the people that sell or make them and even then they only claim something miniscule like a 2hp gain.

IMO they are a ricer mod. No added performance, just makes the engine bay look like it's been butchered.

Meh its a cheap mod. Ill take any reduction in wgdc running my stockers at 20 psi lol

[type-dRew]

Originally Posted by hellokitty

Meh its a cheap mod. Ill take any reduction in wgdc running my stockers at 20 psi lol

Open inlets;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Stock airbox;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Comparing wgdc, no difference, if anything its working harder with no airbox

And again, open inlets was 3mph and .4 slower with same 60ft

[Jerain]

Originally Posted by type-dRew

Open inlets;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Stock airbox;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Comparing wgdc, no difference, if anything its working harder with no airbox

And again, open inlets was 3mph and .4 slower with same 60ft

Correct on stock turbos, closed airbox with clean filter feeding colder/denser air to the turbo inlets is always better. Better throttle respons and overall performance, tested multiple times and most (german) tuners agree. BMW does it's homework.

[hellokitty]

Originally Posted by type-dRew

Open inlets;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Stock airbox;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Comparing wgdc, no difference, if anything its working harder with no airbox

And again, open inlets was 3mph and .4 slower with same 60ft

Thank you for sharing!

Was this test done on a stock filter or aftermarket filter using the stock airbox?

[mweisdorfer]

W/ out a tune, maybe 30hp & check engine lights.

With a tune, maybe 50 to 60hp and most likely no check engine lights.

[type-dRew]

Originally Posted by hellokitty

Thank you for sharing!

Was this test done on a stock filter or aftermarket filter using the stock airbox?

I have a K&N drop in filter and also those little scoops up front from ECS with all factory ducting

[Silent9n54]

Originally Posted by type-dRew

Open inlets;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Stock airbox;

https://datazap.me/u/typedrew/2-pass...=3-13-22-23-30

Comparing wgdc, no difference, if anything its working harder with no airbox

And again, open inlets was 3mph and .4 slower with same 60ft

the starting IATs were 33f apart, start both runs with the same IATs and then compare runs, not a fair comparison

[type-dRew]

Originally Posted by Silent11N54

the starting IATs were 33f apart, start both runs with the same IATs and then compare runs, not a fair comparison

It's hotter because the fucking air in the engine bay is hot. Lmao. That's the problem. My intercooler actually knocked temp off by the top of the pass so I'd say that's making it pretty obvious it was the inlet temps and not charge temps causing the gain in iat

My iats were consistent across 6 back to back runs before this. They only jumped when the box was pulled.

It's like doing a dyno with the hood open with open cones. Sure it might make power in that situation. But not after an hour on the road with the hood shut. And again. My cowl was off. So I gave them the best chance possible.

Here's my first pass after driving two hours to the track and going straight to make a pass after sitting in tech for 20 minutes. Only gained 11 degrees full pass starting already pretty warm.

https://datazap.me/u/typedrew/first-...22&solo=14

[Jeff@TopGearSolutions]

DCI is fine but you really need a good FMIC then. Otherwise, there are better intakes like the AFE Momentum GT that will breathe better and draw in cooler air at the same time. The stock intake is too much of a bottle neck once tuned and at higher RPM.

[Silent9n54]

Originally Posted by Jeff@TopGearSolutions

DCI is fine but you really need a good FMIC then. Otherwise, there are better intakes like the AFE Momentum GT that will breathe better and draw in cooler air at the same time. The stock intake is too much of a bottle neck once tuned and at higher RPM.

THIS !

[type-dRew]

Originally Posted by Jeff@TopGearSolutions

DCI is fine but you really need a good FMIC then. Otherwise, there are better intakes like the AFE Momentum GT that will breathe better and draw in cooler air at the same time. The stock intake is too much of a bottle neck once tuned and at higher RPM.

I have an excellent intercooler that knocked off all the temperature gained by the engine bay heat being sucked into the inlets. I was still 3mph and .4 slower.

I am sure there is a point where the difference in flow is more important than the heat. I'd imagine at that point it would be time for inlets.

My first pass at the track from the above datalog was only 10 degrees lower iat at the start than 'open inlet' pass (And the same at the middle and end) and it was .3 and 3mph faster. Not nearly enough iat to make a discernible difference and it still went faster, with a WORSE 60ft. This was .15 slower than my best pass that day. #223

[iqraceworks]

As far a FMICs go.....for a street car that never sees the track, is a good 5 inch intercooler good enough....or is the 7 inch mandatory?? My car will be a daily driver that might see a little stop light racing every now and then just playing around.