I just installed my takeda short ram intake, and was wondering what you might think, about a HEADER MOD, would it be too much sound? Would it make a difference? Is their one out for the car yet?

 

Got some bad news for you if you have the Base (3.5L) or SHAWD (3.7L)...

Look at the area where you'd normally see header primaries... Honda is starting to use these "integrated headers" in more and more of their engine cylinder heads. Another good example of this is in the D18 engines on the Civics. No more headers for our cars, unless it's a downpipe you crave...

However, this setup is actually kinda ideal for a twin-turbo setup? Not saying anyone here actually has the balls for it

http://estore.honda.com/epc/asp/rjane007.asp#

 

you kno you arent that bad when u hold back the sarcasm lol, but yea i figured much about the headers, whats ur opinion on the pipe?

 

How do you like the intake. I'm installing mine tomorrow. UPS delivers it today.

 

i honestly caught myself gunning it down streets and highways jst for the satisfaction of the sound, but after a while you will go back to normal, the noise alone is a big intimidation for those that attempt to paly with u on the road!

 

My opinion is that there won't actually be any "downpipes" produced by the aftermarket at all.

It seems as if with each generation of Honda/Acura, it's harder and harder to mess with the electronics. And since the exhaust system has two cats directly after this port, with oxygen sensors after them, and another cat and oxygen sensor farther down the line, it's going to take alot of electronic tinkering to get the ECU to not realize that you've either lost the 1st cats or the oxygen sensors or both. Then it will throw a code, retard everything and your power will be shot.

Plus, an increase in downpipe size might not do too much considering the primaries are located inside the head and will stay at that same size.

For those interested and with lots of money, they would remove the heads, get them extrude honed (which pushes a liquid sand solution through your ports to enlargen them from the inside, out) and then with all that extra volumetric efficiency, they would probably get two turbos to mount directly after the flange (which are the perfect size/shape for turbo flanges).

All of this will be for nill without the proper way to tune the engine, though. And there are lots of extra "extra's" that will have to be addressed such as increased injector sizes, a fuel return line custom fabbed up, and the problem of limited engine bay room.

I would be interested to see if Spoon Sports will take this car and make a race car out of it. They did it when the Legend (RL) first came out. They did it primarily because it was a Honda with SH-AWD. It retained the stock 5spd auto, but since they stripped it down so much, they wanted to see the capabilities. Now with a 6spd coming out, it wouldn't surprise me if they made a track racer out of one. Also, other tuners might jump on this car for the twin turbo setup I mentioned if a company out there like Hondata or AEM makes a stand-alone ECU for the car. The only problem is, how do you justify taking a $40,000 and adding in another $12,000 ($18,000+ if you build the engine) to it and not wondering why you're just not buying a BMW, Mercedes or Corvette with those HP numbers already?

 

you make a good argument, i think fine with the intake now lol

 

The dealer said not to install it when i asked him...he said it could mess up some sensors where the stock intake is, they send the car a notifications that says something, it tells you in the driver seat mini info screen where the gauges are and you lose your warranty.

Sorry if this doesn't make sense:P

 

You mean the intake will void the warranty? If so, you are mistaken.

 

Wow, there is a whole lot of misinformation going on in this thread.

#1 Correct, there are no more 'headers'.

#2 The Primary cats are NOT inside the heads. They bolt directly to the head. The pre and post o2 sensors go on these cats.

Stock setup:


The 3G TL uses the same setup, and yes there were aftermarket parts used to replace the cats. We cannot use these exact parts because now there is an EGR pipe connect to the bottom of the cat, whereas previously this did not exist. Someone just simply has to put a flange there to bolt up the egr pipe. Here is what they look like:


#3 As for a downpipe, or what is mainly called a j-pipe, I could guarantee with 100% certainty we see an aftermarket replacement of every piece of equipment shown here in this picture within the next 2 years (this is the AWD exhaust, the 3.5 exhaust is slightly different):

 

2. I don't think anyone said anything about the cats being inside of the heads?

3. I would hope there would be a J-Pipe available in the future. However, I want to know what you think the solution for the deletion of the two primary cats would be when it comes to clearing the codes that are bound to come up when an aftermarket solution for downpipes appear? Are there companies that make "resistors" for the O2 sensors so that they aren't telling the computer something is wrong?

 

Sorry, I don't mean to call you out, but you did ask.

Also for sensor codes, it won't be a problem. Same thing the 3G TL guys do with the primary cat deletes. See the picture I posted of the straight pipes? The 90 degree pieces. The o2 sensors plug into there. It's typical old school procedure where you space out the o2 sensor further out of the flow of the exhaust thus giving it lower readings and not tripping any codes. I don't think there will be a problem. If anything, the one problem may be the EGR sensor seeing a higher flow than normal, but I'm not entirely sure that will be a problem either, it should adjust for the flow.

I for one though prefer resonated primary cat deletes but this would bring the cost up.

 

Ooooohhh, I see what happened now. When I said the word "primaries" I was refering to the construction of a header where the first tubes to connect to the exhaust ports were the primaries, then where they joined together down the line are called secondaries (normal in a 4 cyl header) and then they are all joined by a collector. I wasn't meaning the primary cats, haha.

Anyway, you are probably more experienced with the layout and aftermarket parts of the Honda/Acura J-series engines than I am. How many oxygen sensors are there in total on a J-series? 4 or 5?

 

It depends on the year and generation of the car. But for the 4G, it is 4 sensors total, 2 on each primary converter (front/rear). The rest of the exhaust from the j-pipe back has no influence on sensors so you can open it up nicely.

 

^^^ MY 8th gen Accord 3.5 is the same exact way. I will be having the pre cat deletes installed with an egr flange mated to the precats. My mechanic is already fabbing one up for me. & as Clean CL said O2 sensors arent a problem. All of the parts from the 3rd gen TL fit on my engine/car without major modification. Someone who knows a 3G TL owner should see if the J pipe and or 3rd cat delete fit.

 

Do you think your mechanic can replicate a front pipe if I send one to him? It looks very close to the same viewing the parts diagrams.

I tested the j-pipe and 3rd cat on my AWD TL, did not fit.

 

so most of the rv6 items bolt right onto your new 8th gen accord? pre-cats (minus egr), test pipe and j-pipe?

 

Yea he is very good at making parts. He just made an 80mm Throttle body from scratch that bolts right up to J series IMs. He made it for his J36 build w/ M90 Supercharger on his 7th gen Accord. Shoot him a PM. His name is NVA-AV6

Im thinking the J pipe and 3rd cat did not fit since you have the 3.7. the FWD guys might be in luck though.

 

Yep. I just purchased an ATLP J pipe and 3rd cat delete(test pipe) for my car that came off a 3rd gen TL. I'm going to install sometime this weekend or next.

 

the progression continues

ie https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/atlp-j-pipe-8th-gen-accord-coupe-741233/

 

I just dynoed with the J Pipe/3rd cat delete and Injen Intake. I made 260whp & 241wtq. Stco was 240whp and 219wtq. This was with precats and stock exhaust still on. About 76 degrees F and 65% humidity too. Going to try to get precat deletes put on this weekend.

 

NVA-AV6 is your mechanic? LUCKY BASTARD!! I think his name is Paul, right?

I've read some of his work.... J-Series God!!!

 

LOL Yea Paul is my mechanic. He used to work on my 2nd gen TLS, put the blower on for me and made me a few custom things. It's one thing to read all he does but to actually see it in person is amazing.

He just made an 80mm TB for his J36 M90 blower. Hes going to fab up a flange for my EGR on the front precat delete this weekend.

New York is only a few hours away. Come on down!

 

I'm waiting patiently on this... I have a set of pre-cats here waiting for someone to add that flange for me, lol.

 

^^LOL I havent forgotten about you. I'll send you a pm hopefully Saturday with some pics and hopefully useful info. I'm sure Paul will use the one he's making for me and make a template for future pre cat deletes for other people.