[bboy8282]

Soo after less than a month after getting my Cobb AP my car feels pretty slow to me once again....looks like its time for another mod for my car. Due to the fact that im "trying" to keep this car smog friendly and for the time being staying away from meth since im pretty much a noob when it comes to using meth...my options are dp or fmic, im wondering if anyone can chime in regarding the power difference between stock dp vs catted dp vs catless dp. Trying to decide if its even worth gettin catted dp or if i should just get a fmic instead.

[nitehawk]

From what I've heard, it's not worth the extra cost to get catted downpipes. They lose their effectiveness over time, where you will have to deal with inefficiency codes. Catless DPs will net you the best gains and you can run S2. If you are concerned about smog, keep the stock exhaust with it's secondary cats.

[nitehawk]

The power increase with catless DP's and tune is usually ~ 20-25hp, the HFC versions will net usually ~ 10-15hp.

[E90SoFlo]

cat less are the only way to go with Dp's.

[badass1g]

For the price catless is way better bang for buck then a fmic, although ive seen some using an ebay intercooler setup that would only be a few hundred and would nearly net you as much power gain as the catless dp's. I actually run an ebay intercooler kit on my 10 second talon and it works great so im no hater on ebay products like this. Good luck sir.

[ar design III]

I would recommend going with catless downpipes and keeping the stock secondary cats for emissions/smog purposes. You should still be able to pass any smog test with the secondaries and you will get all the performance of the catless downpipes.

[badass1g]

I thought all OBD2 smog tests are with the OBD port, basically if the car doesnt have a CEL it will pass. Or is that just a crazy Utah thing? LOL i know we are weirdo's up here and all.

[rader1]

You need a DP fix(BMS sells a good one) to pass an OBD2 readiness test.

Believe me, you want to get: a FMIC, intake and catless DPs so you can run stage 2+. It'll be semi-expensive but stage 2+ will make you giddy like a school girl. IMO stage 2 felt slower than stage 1 because it only has linear throttle mapping available. For the street, stock throttle mapping is where it's at.

PM jeff@topgearsolutions and work with him on your order.

[sdstatestud88]

Go catless for sure, and if you're worried about CA smog testing down the road just keep your stock ones.

[ar design]

FMIC + DP + Meth is the way to go. PM me for the best prices and service anywhere. We have FMICs, DPs etc in stock here at the shop, unlike most drop shippers.

[Shellacked135i]

Catted DP are a waste of money. They are over priced and have a high failure rate. Eventually they wont perform as good as they did when they were new so you will have a low performance paper weight that wont pass emissions anyway.

Has anyone ever posted up a dyno between catted dp and stock?

[JStang]

Originally Posted by ar design

FMIC + DP + Meth is the way to go. PM me for the best prices and service anywhere. We have FMICs, DPs etc in stock here at the shop, unlike most drop shippers.

Meth is a no go with Cobb for now. Sounds like you are a perfect candidate for Stage 2+. The jump is as impressive if not more so than going from stock to Stage 1 Cobb. For another $1,500 + installation costs you will not be bored.

[vase330]

Originally Posted by badass1g

I thought all OBD2 smog tests are with the OBD port, basically if the car doesnt have a CEL it will pass. Or is that just a crazy Utah thing? LOL i know we are weirdo's up here and all.

NJ, and VA (Northern VA counties only) sniff the exhaust fumes so just CEL free means zilch if you are noxing up the environment you will fail. So if you gut all the catts but fool the system with suppressed CEL, it doesnt matter the machine will fail your stinky exhaust. I am sure there are other places that sniff especially Cali, but I can only speak for those two because I have gotten inspected in both states know for a fact. YMMV.

[Tzu]

Ive read a lot of success of using the barebones JB4 to control meth on top of Cobb. I beleive BMS released a dedicated safety for cobb users who want to spray meth. I think Mike actually made a thread about it on here. I'd look into that as an option.

[MDORPHN]

Originally Posted by JStang

Meth is a no go with Cobb for now.

That is not the case. You might want to contact Jeff at Howerton Engineering to discuss his Aquamist systems.

Neil

[xclone]

I'm using a BMS WW meth kit on my 535 & cobb. The hobbs switch kicks on the meth at a preset (you choose) boost and sprays until you go below that #.

[bboy8282]

Thank you for the input and advice everyone...i think ill prob pick up some catless downpipes and deal with emissions down the line....bought the car in early 2010 so i def got several years before i need to do emissions.

[JStang]

Originally Posted by MDORPHN

That is not the case. You might want to contact Jeff at Howerton Engineering to discuss his Aquamist systems.

Neil

I stand corrected. I was under the assumption that running the stand alone Cobb Tune (No piggy to control Meth) will not yield any better results when used with meth until the new maps are released.

[MDORPHN]

Originally Posted by JStang

I stand corrected. I was under the assumption that running the stand alone Cobb Tune (No piggy to control Meth) will not yield any better results when used with meth until the new maps are released.

Now you're raising a somewhat different issue.

I took you earlier statement about meth being a "no go" with the Cobb tune as indicating it didn't work with Cobb. That is not the case, but the benefits will be reduced heat soak, timing retard, etc. In other words, a happier motor delivering more consistent power.

However, you're right -- there is not yet a "meth tune" available from Cobb that takes full advantage of the meth to produce more power.

Neil

[Jeff@TopGearSolutions]

Actually there is a big misconception in here....

Meth works just fine on Cobb. However, the individuals who are currently using it are using their stage 3 Race Map in beta. Which allows for increased ignition and boost to take advantage of the meth.

Without access to that map or ATR there is no point running methanol on any other map unless you simply wanted to keep IAT at bay with a small nozzle. This would allow for consistency for say road course use.

Any universal system or meth kit can work with Cobb just like any tune, its simply not integrated yet from Cobb themselves. Some people are stacking Jb4 to take advantage of those meth features of integration but in my opinion you might as well just run JB4 alone at that point. There term integration is used loosely so its important to understand that just because Cobb doesnt have an "integrated" solution doesnt mean it cant work.

[themyst]

*shrug* my 200 dollar basic meth kit with no failsafe works just fine with the Cobb race map. Just use your brain and view live data through the ap so you know the cars running well. If you can't or won't do that using a jb4 for meth safety is a plausible solution.

Ps- the Cobb race map timing curve is the same curve as stage 2 FMIC aggressive. It just runs more boost.

[Jeff@TopGearSolutions]

Originally Posted by themyst

*shrug* my 200 dollar basic meth kit with no failsafe works just fine with the Cobb race map. Just use your brain and view live data through the ap so you know the cars running well. If you can't or won't do that using a jb4 for meth safety is a plausible solution.

Ps- the Cobb race map timing curve is the same curve as stage 2 FMIC aggressive. It just runs more boost.

Ah, well they should add some ignition then.