bgates1654

Yeah from what I hear the quality, fitment, and customer service would definitely make up for the price difference so long as they give similar gains. Now if the cattman headers truely gave 30whp over stock

IceY2K1

iTrader: (3)

Fezzik,

Is there a chance anyone else dynoed that day you did with the headers?

Are you going to dyno anytime soon for other mods.....say...a TS ECU or SAFC?

IceY2K1

iTrader: (3)

Fezzik

iTrader: (2)

I do not think anyone else dynoed the same day. I got out of school early and was able to get there before anyone had a chance to get there. THere was an evo on there but he had dynoed it a few days back. It was producing 490whp. LOL wish i could do that right now. Ok, well i wasnt really thinking of doing the TS ECU cause it was a lot of money and some people were not getting gains. But now that I have headers which i originally hadnt plan to buy, so i may. If I get the TS ecu i do not know if i need the SAFC. I also have a spare 2k2 ecu that I would use to dupe my origial ecu onto. I truelly havent ever messed with this stuff. But I'd like to start workin with a SAFC II maybe. SO we shall see.... when i get more money. Uncle Sam is gonna want his money back soon.

bgates1654

Check this out. TS ECU Dyno Read the entire thread though. Read about the L-Spec TS ECU HERE
L-spec TS ECU is $345+shipping and if you get it you will need SAFC-II for tuning the A/F and timing. You can get the SAFC off ebay for 250+shipping maybe less.

IceY2K1

iTrader: (3)

IMHO...a SAFC, TS ECU, or eManage is REQUIRED with headers, no matter the brand.

Anyone who runs I/H/E on a 2K2+ without one is too lean.

HNDA ETR

iTrader: (10)

i made huge gains with my cattman catback and headers on my 2K... of course I WAS supercharged back then... i can still feel a difference with the catback and headers on my 2K2 though...

bgates1654

I wouldnt get the full spec TS ECU if you have headers. They havent figured out how to get the A/F right. When I get my headers I will be getting SAFC to tune the A/F and timing (if needed).

IceY2K1

iTrader: (3)

SAFC only does fuel....you NEED an eManage for fuel and timing.

Ammi

iTrader: (26)

I would also like to know that

HNDA ETR

iTrader: (10)

hey icey...

has anyone gotten the emanage to control the timing correctly yet? i thought dixit wasn't able to get it working...

IceY2K1

iTrader: (3)

He got it working, but did have a pending code.

Other 4th geners have and many VQ35 350Zs have the timing working.

If you use the diodes and have the latest firmware version, it doesn't fry coils.

SR20DEN

iTrader: (7)

You don't have to modify the EGR port on the Cattman headers for the 2k2. That EGR plug can probably be ordered from Nissan for a 2k1 Cali spec vehicle.

SR20DEN

iTrader: (7)

Incorrect. Many bolt ons actually allow the engine to make more power (headers, intakes etc.). This can easily be proven with MAF and Injector pulse width data.

BlackBIRDVQ

iTrader: (15)

01 Cali spec vehicles do not have EGR ports on the exhaust manifolds. You need a Air injection valve plug for a 94 Sentra SE-R. It is the same size as the EGR pipe bung, 91-93 SE-Rs had air injection valve which connected to the secondaries of the stock exhaust manifold, in 94 they removed the AIV from the SR20 engine and put a plug in the exhaust manifold secondaries- or the downpipe as some would call it.

SR20DEN

iTrader: (7)

I have installed headers on two different A33 Cali spec (4 Oxygen sensor) vehicles and both had a plugged EGR port on the bank one exhaust manifold.

BlackBIRDVQ

iTrader: (15)

I have done a VIAS on my car and looked down at the manifold- nothing there, I also did my PR motor mounts and looked at the manifold to make sure, and my car has no EGR fitting on the rear bank- one manifold.

SR20DEN

iTrader: (7)

I was wondering if they have different manifolds that went on those cars at random. As if they were just getting rid of old parts from the shelf. One of the cars I did was a AE that had the plugged EGR port.

BlackBIRDVQ

iTrader: (15)

My car has a production date of April 01, which would make it a very late 01 cause 02s where already built in June. When I ordered up my VIAS I needed the VIN cause there are some production changes. As a matter a fact I get asked for the VIN alot when I go in for odd parts for my car- like bushings, gaskets etc. I know for a fact my front exhaust manifold I had on my car is the same one as the one used on a 3.5L cause the stampings on it. The front close coupled cat is the same as my friends 02 Maxima's. We compared them when I did headers on our cars.

Dave B

I just want to say thanks for the great comparison and it's good to see the headers made such great gains. I wish someone would do this comparo with a 4th gen. All us 4th geners have to go off of is track results and no one has shown any significant improvement in ET or MPH over just a standard y-pipe. Since the 4th gen Y-pipe removes the precats, the gains are far better with these y-pipes and it's probably why we aren't seeing measurable gains at the track.

Fezzik

iTrader: (2)

Ok here is the info about each dyno
Pre-headers: Barometric pressure 29.52 in.Hg; Vapor Pressure 0.16in.Hg; Intake temp 90.8F
Headers Installed: Barometric Pres 29.46.inHg. Vapor Pressure 0.12in.Hg; Intake temp 86.2F

2k3TitaniumSe

iTrader: (3)

Wow! Those numbers are great.

CullenJ76

iTrader: (3)

Thanks to Dave for this, although my neck is still sore from all the wiring I had to do! Dave's car showed GREAT gains immediately after the install. We were playing around on the highway and I was VERY impressed with how the car is running w/ the headers. Thanks again Dave. You need to borrow my slicks on your next trip to the track for sure.

dadiesel

So if I already have a Stillen Downpipe on my car, and wanted Cattman Headers, then my downpipe is worthless right?

Fezzik

iTrader: (2)

The headers themselves will replace the exhaust manifolds coming from the car, the pre-cats, and the y-pipe to the cat. So everything from the engine to the cat

Cattman

iTrader: (77)

Hmmm, I can't fully agree with what you've said. Gains of a little under or over 20hp are typical on 95-99 VQ30DEs and a few hp better on the 225hp 00-01 VQs (compared with a stock y-pipe). There are no y-pipes that make that power and any tests I've seen that suggest otherwise are clearly bogus (based on wierdly anaemic baseline runs, not strong y-pipe runs).

As I recall, Ceasar's Chariot added the headers during the summer and held the same track times at 90+ degrees that he was running w/o the headers when it was much cooler. Hardly a definitive test, but the headers had to add significantly more power than the cheap y-pipe they replaced for this to occur - nothing ambiguous about it, that's basic physics.

Hopefully we can get a good dyno from a VQ30DE owner (preferably showing the difference between a performance y-pipe and the headers) when the new headers come in later this week - we offer a $50 rebate for dyno fees if the customer contacts us ahead of time and has the test done and recorded the way I need it to be.

Agreed that the headers do better on the VQ35DE, but I suspect that has more to do with replacing stock exhaust manifolds than the pre-cats - precats don't typically rob that much power but every other stock exhaust component on the 02+ Maximas seems to.

Brian C Catts
Cattman Performance

E55AMG2

iTrader: (4)

I had no fitment issues with my HS headers, and I can name a few more who didnt.

jrod1014

iTrader: (2)

insane numbers.. my buddy's stock 2004 350z dynos 238 to the wheels... nice to see a maxima get within 3 hp... with just an intake and headers (correct me if i am wrong)

joebangaa

iTrader: (3)

TET says the same, andy said something about elongating a bolt hole sometimes but it's not difficult for a shop.

i forget if there are any HS dynos floating around...anoyone? i'd expect them to be slightly less if they didnt have intake, but if the power gains are very close then i can't justify the extra 275 bucks...that's like an intake right there!

claudiusmaximas

those are awesome gains...i guess i know what i'll be saving up for next...