If the gasket has a sharp edge on it and sticks into the airflow because of improper size then it will cause a disturbance. = rasp The nismo gaskets are rounded on the edge so even if it is a little off the air will flow smother over it.

 

hmm very interesting... its one of those things thats becomes obvious only AFTER someone else tells you about it haha...

so im guessing it would be wise to use the nismo gasket between the nismo y pipe and the cat...

are the stock nissan 350z gaskets different than the nismo gaskets?? im guessing yes, but just want to be sure.... thanks

 

There is a kit you can buy from the dealer that replaces all the gaskets.

 

Crap I was wondeing which way the gaskets faced when I was installing...

 

where can i buy the nismo gasket set?!

is this the right one?

http://www.thenismoshop.com/ikorb.ph...oduct_id=12350

thanks, thomas ;-)

 

Yep that is the one. They also have it at mynismo.com

 

thanks a lot ... i have the stock exhaust and want to buy berk hfc ... do you recommend these gaskets or should i go with oem products?!

thomas

 

These are 2.5 at the cat and 3 inch at the midpipe. The stock is 2.25 at the cat and 2.5 at the mid pipe. So these would not fit the oem stock exhaust.

 

so i guess (if this theory holds) it makes sense to buy the nismo gaskets (if they didnt come with your nismo exhaust already) when mounting to stock cats....

if you have the BERK HFCs, you can buy the BERK gaskets that go in between the hfc and the y-pipe.... it would make sense to buy the BERK gaskets when pairing up the BERK hfcs with ANY exhaust... that way if you swap exhausts but keep the BERKs, you can re-use the BERK gaskets and they will still be the right size...

and im now realizing that when i put on the BERK HFCs with my nismo, i made sure to replace the old gaskets BUT i did not do the research and bought STOCK 350Z gaskets which according to the posts above me are NOT the right size... and i do have a really annoying rasp in the higher rpms... (there really needs to be an epiphany smily... like a happy face with a bulb on its head..)

 

im a little confused by your wording here... do you mean the BERK hfcs are 2.5 inlet at the top, where the hfc connects to the header, and 3 inch at where the y-pipe connects to the hfc?

 

Are you kidding me? Tire spin might effect E/T but not so much with trap unless you spin all the way down the track. End speed an altitude may have an effect, but not enough to make the estimate 30whp low. I dont know about Ennis, but 106.2 is not a 280whp car, especially when stock Z's have trapped 107.xx. There may be some driving and track condition variables but if are really putting down 280+ at the wheels, you should be trapping higher than that. I am sure you will defend your numbers because you want to believe them so think what you want. I just think otherwise.

 

Why are you questioning his numbers? He provided dyno-jet sheets. Are you implying those numbers are scammed?

He stated his conditions at the track and he also said he was not hooking well. Maybe the track conditions played a role, and maybe some of his driving. No need to question his dyno numbers.

 

Because I don't believe them. I have operated a dyno before an know that you can make them say whatever you want. Driving and track conditions are going to effect E/T more than trap speed. 280+who and only 106mph don't match to me. Did you not see where stock Z's have trapped higher? With 280+who he should easily he able to trap close to 110.

 

Again I have been down the track 100+ times in different cars. Car A will not trap the same as Car B even if the HP is exactly the same.

Each track is different and to say you can find exact hp by a 1/4 trap is bs. What if the track has a slight decline? what if the track has an incline. What about a 30kt headwind. You are saying that this variables do not have an effect on a MPH?

You are not benefiting the group or this website by making claims to discredit someone just because of your bs online calculator. I only post what I have PROOF of my time slip, my dyno, You have nothing.

Take the information for what it is and STFU.

 

No those numbers are for the Nismo exhaust. This thread got a little side tracked.

 

I'm sorry, I don't know what I was thinking. You're right. My years of experience with cars, dynos, racing etc means nothing compared to your obviously be-all-end-all dyno sheet. Congratulations on your unbelievable numbers. I sure wish I was so fortunate. I'll try not to degrade this site anymore.

 

Are you serious? How about this time,
07 Nsmo 6spd 14.017@_97.83mph 2.152 60ft
Does that mean he was dynoing no where near 260whp?
You are retarded. Judging by your philosophy, he must have 220whp..
Don't come in someones thread running your mouth like you know it all because you dynoed cars before, then pick out one of the best trap speeds on the forum and come bashing on a dyno thread claiming this and that.
Dyno's obviously aren't the end of all things in determining horsepower, but drag times and trap speeds are not the "be-all-end-all" of things either.

 

There was something wrong with your car if it was running in the 11's with just a nismo exhaust.

I've seen revups go rich after adding exhaust mods as well, maybe that's all it is.

You gained a lot of power just by shifting AFR to 13.

What the cats did is a band-aid fix to your car running rich. Most likely you had higher horsepower stock than with your nismo.

 

Yea mine was way rich but I even rest the ecu that day and it did not change the AF.

 

You are 25 years old when you get closer to 40 then you can talk to me about years of experience.