I was wondering if the high flow cats were worth the price? Do they provide a large increase in performance? Want to add some more power so some advice would be appreciated. Thanks guys

 

None of the available mods for the TL provides a "large increase in performance" as you ask,i think that is pretty common knowledge on this forum.Until or if we ever see a tune,then things will change.

At this point i have every available bolt on performance mod and while i know that there is some improvement, i would not say that it is a vast one.

Worth it or not, is just a choice that you have to justify.

 

If you live in a state with emissions testing it is an "alright" mod that'll let you pass inspection still. If you are in a state without testing, I'd recommend the precat delete instead as they remove the complete obstruction and you gain slightly more power up top but you do loose some torque down low.

I haven't seen a dyno of anything really on the 4G TL so it's hard to justify what will and won't give you extra power. I know the J-pipe on the 3G lead to a very nice performance increase with a swap.With that said, there are mods that are a better bang for your buck that don't introduce more problems (if you are in a testing state)

 

I'm in NJ so we do have emission testing which does sick. I do have the j pipe installed already and exhaust. Also have a K&N intake installed. Want to gain some more power but don't know what to do so that's why I suggest the high flow cats. Any other suggestions for some power? Any power at all?

 

U will notice a difference specially if you use it with j pipe and cat back system also i recommend apexi neo and dyno tune for max performance with bolt-on

 

Are you referring to the pre cats or the third cat? If you haven't done a j-pipe or an exhaust I would recommend those first.

And the Apexi NEO won't work with the 4G TL.

 

Really ??,could you provide more info on the Apexi Neo and dyno tune.Do you need a wiring harness,is one available,do you hard wire it and run it as a piggy back etc.Will it even work on the 4G? Check out what the 3G members think about this unit.

OP my advice to you would be to wait for the Hondata tune (if it become a reality) before using an air/fuel controller.The Hondata tune offers much more management control such as timing,fuel maps,shift points and rev limits.

You also know what is available for our cars,choose whichever one you want and go for it,none really provides a huge advantage over the other.You will not want the PCD's since you have emission testing and will most likely fail.
I am not sure if your state does the sniff test or just the engine codes.Here in Toronto we moved from the tail pipe (sniff) testing to just a diagnostic test for engine codes.

I could provide you with a list of mods i did to my car and again i will say that it is quicker overall just not significantly so.

 

Here is a pic of a 3g type s corrected with apexi

 

As u can see the last bar says corrected so its possible and as far as wiring u dont need no harness i seen it done . the pic proves it

 

In jersey its not like that car was tuned on the neo and ecm had no codes at all passed inspection with no issues at all .. im not saying its a big gain all im saying it help and helps alot

 

Not a question of if it was done ,was it done on a 4G? and what are the results?

Many on the 3G side feels that this is a waste of time more so now that a proper tune is available for them.

I am just curious about the info you provide and i am not doubting you either, the picture of the 3G installation proves nothing.Many on the 4G side would love to see a proper tune become a reality,i have read about the Boomslang harness but no real proof of performance improvement.

 

Yeah that be great if you could provide a list of your mods KarKraze. Thanks!

 

RV6 J Pipe with 3rd cat delete
RV6 Ceramic coated HFPC
Light weight stock Diam Pulley
CT E Ice Box
CT E axle back exhaust (removed due to loudness,no difference in performance)
Polished and Ported runners
Max bore Throttle Body
P2R Gaskets.

I believe this is all i have for bolt on performance mods. A member posted dyno chart with bolt on mods and different wheel set up. He lost most of the gains he got with the bolt on when using heavier 19's vs stock 18's.

If you haven't seen that post i can look for it when i have some time.

 

Like i said b4 its a good way to pick up a few extra hp i have it on my 08 type s and in my 4g also just waiting for 4wd dyno so i can try it out

 

Here is the link to thread i mentioned

https://acurazine.com/forums/perform...8s-19s-911877/

 

I seen it and i cant question or comment on it because i havent taken my 4g to the dyno yet so i cant really agree or disagree but i will soon find out....On my Type s i was able to pick up alot of power with bolt-on and after using the neo it made a difference where the car ran smoother all the way to 7500 rpm

 

i might just wait until a tune comes out for my next power mod. think I'm going to go with some Tein Street Advance coil overs next. any opinions not that?

 

Do it.

 

I think you will love the coil overs.

 

So it's not worth the $ for a HFC... What about the J-pipe with a swap out Muffler? I just have this integra mentality can't get the Headers without the High Flow cat or test Pipe...

 

Funny how our cars take so much just to gain a few hp while those turbo BMW's can gain 80+hp with a JB4 chip.

 

Man that's with most boosted cars.... Or a V8 just cams and full exhust

 

It's Naturally Aspirated (our cars) vs. Forced Induction and with FI all you can do is crank up the boost by 2-3PSI and have extra power until a turbo fails and shatters in your engine. Happened to a guy that leased a 335 and he put the boost at MAX and drove it like a racecar. 25K miles on the car and the turbo shattered sending debris through the engine and ruining the engine. He had to pay upwards of 10K in repairs.

 

Oh I know, that and the fact that you'll have carbon build up and emission issues is a reason why I'm not looking towards a turbo vehicle as my next purchase.

Really liking the new Lexus GS tho, so that's something I'd consider.

 

High flow precats will give you some pretty good gains. From our experience the restriction is in the precat a high flow 3rd cat doesn't do much. We recently did some testing with some high flow precats on a 9G accord equipped with a J35 and stock exhaust. The gains are pretty impressive. We had doubts about the baseline however it was consistent with some other testing we were doing.


********9G Accord V6 dynos. Similar but not the same engine********


Stock car + intake lost 1HP and 2TQ

 

Our V2 J-pipe deletes the third cat, and offers a noticeable gain in performance over stock. It will also provide a slightly deeper exhaust note, but you're not really going to notice it with the stock exhaust. The V2 J-Pipe is usually the first horsepower mod we recommend to TL owners, as it is a great bang for the buck.

*The V2 J-Pipe will not pass a visual inspection as it deletes the 3rd Catalytic Converter*

XLR8 V2 J-Pipe (FWD):
XLR8 J-Pipe - Excelerate - HOA - Japanese Performance Specialist

XLR8 V2 J-Pipe (AWD):
XLR8 J-Pipe - Excelerate - HOA - Japanese Performance Specialist

 

Here are the working links to our J-Pipes. With the stock exhaust you won't hear it as much, but it will provide noticeably more performance.

XLR8 V2 J-Pipe (FWD):
XLR8 J-Pipe - Excelerate - HOA - Japanese Performance Specialist


XLR8 V2 J-Pipe (AWD):
XLR8 J-Pipe - Excelerate - HOA - Japanese Performance Specialist

 

Just want to update and say HFPC are worth every penny i had them installed today and let me tell u what a difference it made together with my Jpipe its not loud unless u gon on full throttle u can notice the car pick up faster and u can notice the reaction when u slam the gas

 

Sorry for the highjacking the thread a little here.

I looked into HFPC vs PCD.
I wanted to get the PCD but I think when I looked into it a little,
ppl said that after I install PCD, I will get a check engine light and it will stay off a while but it will always come back is that correct?

 

Car looks good. I myself only swap the Mufflers out. Can't lie ain't going to say there was a world of difference lol. Just I have been watching the J-pipe HFC FOR A LONG TIME. But the gains or lost of gains in some cases always worry me. Do you have a sound clip by chance?

 

Probably the best combo of mods available for this car,happy to see you are enjoying them.


PCD's will trigger a CEL and fail emission if you have to do testing. That is not the case with the HFPC.
The only time that i experienced a CEL running the HFPC/J Pipe is when i had the Takeda SRI and under hard acceleration if the car is not properly warmed up ( under a minute).

Never heard of anyone who experienced loss with this combo.

The Takeda SRI is debatable but IMO losses out power in the higher RPM range.

 

KarKraze U were 100% accurate with the HFPC they are not loud at all thanks for ur help....
Now in my opinion even with the Takeda SRI there is no power loss at all... I have to dyno the car still but IMO every mod i did i can feel the difference i mean not crazy power gain until last night on the parkway after installing the HFPC i noticed the most difference

 

The Takeda enhances the overall sound of the mentioned mods. What I noticed is the engine will bog down slightly just before the redline with the Takeda also if you are around 120 kms and you floor the car it will also bog down ever so slightly, perhaps not noticeable on the manual trans. That does not happen with the stock intake.

IMO the addition of the IceBox with the mods you have is the absolute best combination.

Forgot to mention that I also love the stock exhaust tone with the J pipe/ HFPC combo. Because i am not in to loud exhaust, the enhanced tone from those mods is an additional benefit. For someone like myself, it is the perfect exhaust tone, no drone and never intrusive but loud enough during acceleration.

 

I dont feel that with the Takeda im on the AWD 6 Speed i did a couple pulls on the parkway last night up to red line and no issues

 

Cool, sounds like all is good, the Takeda does have a nice growl.

Another thing, our engines are susceptible to heat soak and I noticed that during the cooler morning temp the car performed well with the Takeda. In the afternoon during higher temps and driving for about 20 mins the heat soak is noticeable and the performance drops.

Not noticeable with the stock intake or the IceBox.

 

Nothing personal but this statement is actually funny lol. You will never make as much hp for an NA engine compared to an FI engine. The bolt ons will help but it needs a tune to maximize those bolt ons and correct the AF ratio. If we had the option of race cams, forged pistons and other engine internals for the 4G, those would make some serious gains with a good tune. Issue is, there is not a big market for the 4G in regards to performance parts and we cannot tune the 4G. The engine is quite capable of making power.

 

I can honestly say i havent noticed it at all in the heat and i tell u in jersey the heat is crazy lol

 

Certainly happy to hear that your mods are working great, enjoy

 

apexi neo just came in Sprint booster in next on my list and i have my friend from magnaflow working on a full 3 inch exhaust from Jpipe back and im done with the performance parts for it....Unless a i get the M90 CHarger

 

Be sure to share your thoughts on the Sprint Booster and the Apexi Neo. Would love to see how the Apexi is wired and what difference it made.

Perhaps you can create a separate thread for those mods.