When you're about 800 years old... but she doesn't need to know that.

Oh, and also tell her that they won't rust, too.

While we're on the subject of Cattman, here is one of the e-mail responses I got to my endless annoying questions:


"These parts work a lot better on the VQ35. I have a pretty good idea of what the individual mods will do on a 3.5, but I haven't dynoed the sequence of mods yet (just starting to with my car). I'll list the parts and the power they make by themselves, and then give you my best guess on what it would all add up to (the total is never as great as the sum of the parts - they peak at different RPM levels, the amount of power an individual mod makes will vary depending on when its added in a sequence of parts, stuff like that).

headers - 30whp
cat - 15+whp
catback - 12-15whp
CAI - 7+whp (CAIs can't really be measured on a static dyno)

Total increase could be about 40-50hp, but without documenting the entire process its just speculation. There are factors like ECU programming that can artificially limit power gains. Obviously I have all the parts necessary to do this to my car, I just have to find the time to have each one installed and tested individually.

Brian C Catts
Cattman Performance"

 

Get a warpspeed metal substrate cat, and you'll never have to worry about the cat dying on you. OEM cat flows fine for mild mods, for headers, high flow is necessary.

ighetto: PM me and we can talk about those.

 

I'll take what I can get for reasons. I'll add the rust factor as well to sugar coat it!

 

haha man thast brutal

 

These numbers seem to be on the fat side, headers 30 HP ( on some area not the whole power band)15 HP on the cat, let me argue with this number I never heard of anyone who made more than 2-3 hp, and for the cat-back 5-8 HP the CAI sound about right.

AA

 

I'd have to agree. The cat in the 5.5 is a high flow cat already. no real gains to be made there. the cai sounds right. If headers give 30 hp, I think 10 are from the cattman sticker you put on the fender!

 

Cat = 4 whp, but only when combined with headers.

Depending on the CAI, it could be 12-15hp

Headers give a nice fat 20whp across a good margin of the curve in gains over a Y pipe on a 5.5 gen so 30 over stock isnt too far of a stretch.

 

where can i order these headers cuz..cattman doesnt have it on their webpage...

 

E-mail Cattman or look up Hot Shot headers on google and search from there.

 

for people who have headers on there VQ35. how does your car drive compared to stock? Is it very noticable? Low end torque lose issues? thanks

also. any links to an install instruction/DIY?

 

VERY Noticeable, no low end loss.

Install instruction is all your own.


Fezzik has a dyno.

It's actually amazing, almost like night and day compared to stock, if you have the money, I would suggest doing it.

 

The difference is very noticeable with no low end torque loss.

 

Which brands do you two have?

 

I have Cattman.


Both those and HS have proven gains.

 

now i have heard of some thing about having to wrap up certain parts (i.e. rubber hoses) that sit near the header to prevent heat corrosion. is this really n ecessary? i personally am not going to be installing these if i get them. what did u guyz do?

 

how much would it cost for a mechanic to install it?

 

i also would like to know this

 

Between 8-12 hrs, and the price would depend on their labor rate, if you have a second car, you can roughly estimate about 2 afternoons of downtime if you DIY.

 

oh wow. didn't think it would take that long. is there a difference between the auto and manual transmissions?

 

I've got cattman's. didn't wrap up a thing, but had to extend wires, relocate the bungs, etc. look at the last couple pages on my cardomain website. I've got picks of install and lots of text and comparison photos for a 6spd 2k2 install.

I've got stock catback and the headers give a low rumble up until about 4k rpm. after that all I hear is the frankencar intake. the butt dyno does enjoy the increased pull through the top end. don't feel too much difference in the lower range

 

I have Hotshot headers.

 

i know fezzik did the dyno on the cattman headers. but does anybody have the dyno or know where i can find the dyno of the hotshot headers on the 5.5 gen? i am interested in comparing the two in terms of power delivery at a given rpm. anybody know where i can get my hands on the hotshot dyno? has anybody dynod with them yet? no butt dynos.

 

juice has dyno numbers, probably has a sheet/spreadsheet as well, but he has mods besides the headers and is auto. Maybe when i dyno w/ my cattman headers and intake we ca compare, but still is pretty much apples to oranges.

One thing I notice is when I floor it around town in 1st, the tires lose traction and begin spinning, and before it never used to do that. And for all you guys out there that say that they do that all the time in an auto, keep in mind I'm usually between 5600'-7400' elevation.

I notice from about 3.5k the added power is very noticeable, I will dyno within the next 2 weeks, though I don't have a stock dyno , it will still be interesting to see what I put down as that is my only mod beside a GAB coat hanger.

Trying to keep my car very sleeper-like. I'm thinking of cams but not sure what grinds would be best, and hopefully I can install them right and not have the same low end loss as Phx did.

 

There is actually a low end loss if you have a full exhaust. Id suggest a professional installation unless you dont mind being under the car forever and a day

 

i think everyone would appreciate a HS dyno regardless of tranny or other boltons

 

i am running stock exhaust. so im assuming as long as there is a stock catback+hs headers there should be no loss in the low end? i've seen for cattman that there is gains EVERYWHERE in the powerband including lowend.

 

would there be a big difference between an auto and a manual transmission with the cattman headers?

 

I will post up my dyno up the Hotshot Headers later tonight when I get home

 

cool can't wait

 

Stillen Intake W/Franc mid pipe. RVM Pulley. Hotshot headers, Full Frank cat-back. Dyno'd last month, 226HP/231TQ pig rich after 4k. I need fuel management...

 

The peak #s will be lower due to the automatics lesser effiiciency when compared to the manual (23% for the automatic, 18% for the manual)

 

The gains are significant....you wont be disappointed

 

Here's a link to my dyno results after with HS headers.

http://forums.maxima.org/showthread.php?t=297131&page=2

 

I think 23% is a little high E55, due to the fact that all stock dynoes were very close, within 5-10whp. It's just the 6spd is less efficient than most manual trannys, but still mor effecient than an auto.

 

hey 03blksete those are excellent numbers. is your car 6spd or auto? and also what are these % numbers representing when u guys talk about efficiency?

 

Their talking about parasitic losses in power through the drive train as it relates to the HP at the crankshaft.

A normal average, manuals loose 15% and autos loose 20% from the crank to the wheels.

 

Those are real good numbers. I need to get my base timing bumped up and get an AFC. At redline my AF was 11.5, I'd like to see it above 13...

Actually there is a little bump between 6k and redline where it got a few tenths leaner and there is a corresponding bump at the same point in the HP&TQ plots where the power was up

 

would it still be worth it for an auto to get the cattman headers or should we just stick wit the y pipe?

 

Typical autos lose between 20-25%, Ours happens to lose 23. I found this out from Nissan NA when I was getting the beta flashes for the lack of power TSB (NTB03-023).

 

His car is a 6 speed. The way you can tell is that auto dynos start from 3.5k and up, whereas the manual ones begin as low as 1500 and as high as 2200.