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Pseudo's Guide to Adding Power to Your 4G

 
Old 11-02-2018, 01:34 PM
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Seeing all these mods and it seems like most people here are just sticking around the same framework of opening up the exhaust and a few minor things above that, but what about anything to really sheer some tenths off the quarter mile or add more serious power? It's been a good 9 years since the 4G came out, are there any decent forced induction options out there that aren't ridiculously priced (over like 7-8k) or other shit we can do??
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Old 02-12-2019, 09:33 AM
  #122  
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Adding power

So with all of the upgrades listed above with a very good tune on 93 what power range did you see an increase too?
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Old 03-18-2019, 01:30 AM
  #123  
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Originally Posted by Pseudomaniac View Post
Third Modification: Pre-Cat Deletes (PCDs) or High Flow Pre Cats (HFPC)

Your J35/J37 motor has the heads formed into a single exhaust outlet that feeds directly into a catalytic converter with each bank of 3 cylinders feeding it's own "pre-cat". This is effectively choking the engine (at the sake of emissions and noise) right out of the gate, and one of the single largest bottlenecks you can remove to gain power on your TL.

Caution: Removing these is no picnic. You will need to have an extensive set of sockets and extensions, knuckles of steel, a good place to work, and patience. This involves removing the electric cooling fan, and disassembling heat shields from the rear pre-cat on the car, working in between the firewall and the engine, and extracting a 7 inch diamter pipe out a 6.75 inch opening - It's do-able - but it's not fun.

PCD vs HFPC: The PCD is effectively a test pipe - no catalyst - straight through flow - wide open. The HFPC is a high-flow catalytic converter.

Will I have computer errors: With the HFPCs none have been reported. With the PCDs, which include spacers called "defoulers" - some have had codes thrown and RV6 was working on modified defoulers (free to purchasers) to correct the issue. I have had the RV6 PCDs on my car for a month with no codes to date. I think much of this depends on the install. Point your defoulers straight up.

Options:

~$559+Shipping - RV6 HFPC

~$359 + Shipping - RV6 PCDs

I went with the PCDs - but I don't live in an emissions state. The cost is less than the HFPC, and the power gain is greater. I have not had problems with codes. These will add some audible rasp to your exhaust. These will make your exhaust stink - noticeably. The power gains are debatable, conservatively 10-15 HP and 15-20 HP on the high-end.

The PCDs have a ceramic coating option that I opted for, to keep everything nice and shiny. I highly recommend it. These are also top-notch pieces and very well made. All gaskets, bolts, and anti-seizing for the sensor bungs included.

Other members have been very happy with the HFPCs.

Richie (RV6) does not communicate very frequently on the forum, but was very prompt when I directly contacted him via phone and email. Ships promptly too.

This mod is the concensus "most horsepower" for one modification on the TL. It makes sense to do the HFPC or PCD and the J Pipe at the same time. Acurazine users have mixed the HFPC and PCD with the XLR8 J Pipe without issue.

** I am not paid to endorse or slander any product; just speaking on opinion, experience, and observations - which makes me objective.
Now I know this is an old thread, but by chance has anyone did the high flow pre cat choice in California? I'm wondering on smog, assuming it won't pass if I do this. I want to do pre cats all the way to tips and are just wondering if the TL would still pass. My car has no issues and has 70,000miles. Thanks in advance !
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Old 03-18-2019, 11:59 AM
  #124  
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Originally Posted by alexpeters View Post
Seeing all these mods and it seems like most people here are just sticking around the same framework of opening up the exhaust and a few minor things above that, but what about anything to really sheer some tenths off the quarter mile or add more serious power? It's been a good 9 years since the 4G came out, are there any decent forced induction options out there that aren't ridiculously priced (over like 7-8k) or other shit we can do??
Haven't seen anything yet. Only custom jobs.

As far as California goes, I can only say that it won't throw a CEL and that NOx, CO and HC levels are only marginally higher than stock. Enough to pass here in Utah anyways.
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Old 06-25-2019, 03:00 PM
  #125  
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Great thread Pseudo! Much appreciated
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Old 07-11-2019, 01:58 PM
  #126  
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This thread needs to be deleted. I haven't read every post om this thread, but I cant find anyone who has effectively put there 4g 3.7 SHAWDYY on a dyno and seen anywhere near 30-40 hp or tq gains. Like almost every other thread on here will tell you. The j37 is basically maxed out as it comes. RV6 XLR8 blah blah blah. A good driver in a 5AT 4G TL can run with any 6MT full bolt on soup to nuts 4G TL any day. Tune or no tune.
Heres a link I'm sure many have come across.

https://hondanews.com/channels/acura...ra-tl-overview

After you read it you will see Acura built our 4G for practical daily spirited driving while keeping gas mileage acceptable and appealing along with 300+ HP. Enjoy your TL for what it is. Not what Psuedo tells us all adds power to our Honda/Acura motors while he drives around in his 500+HP Benz's. I'm not hating. I would never buy a Benz or anything German. Just saying hes comparing AMGs to SH-AWD. Be serious. 4th Gen TLs are awesome and that's why were all here on AZ.
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Old 07-11-2019, 02:28 PM
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Originally Posted by 4th_GenTLe0260 View Post
This thread needs to be deleted. I haven't read every post om this thread, but I cant find anyone who has effectively put there 4g 3.7 SHAWDYY on a dyno and seen anywhere near 30-40 hp or tq gains. Like almost every other thread on here will tell you. The j37 is basically maxed out as it comes. RV6 XLR8 blah blah blah. A good driver in a 5AT 4G TL can run with any 6MT full bolt on soup to nuts 4G TL any day. Tune or no tune.
Heres a link I'm sure many have come across.

https://hondanews.com/channels/acura...ra-tl-overview

After you read it you will see Acura built our 4G for practical daily spirited driving while keeping gas mileage acceptable and appealing along with 300+ HP. Enjoy your TL for what it is. Not what Psuedo tells us all adds power to our Honda/Acura motors while he drives around in his 500+HP Benz's. I'm not hating. I would never buy a Benz or anything German. Just saying hes comparing AMGs to SH-AWD. Be serious. 4th Gen TLs are awesome and that's why were all here on AZ.
Here you go chief, 2second google search https://acurazine.com/forums/4g-tl-p...ktuner-935385/
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Old 07-11-2019, 03:31 PM
  #128  
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Originally Posted by 4th_GenTLe0260 View Post
This thread needs to be deleted. I haven't read every post om this thread, but I cant find anyone who has effectively put there 4g 3.7 SHAWDYY on a dyno and seen anywhere near 30-40 hp or tq gains. Like almost every other thread on here will tell you. The j37 is basically maxed out as it comes. RV6 XLR8 blah blah blah. A good driver in a 5AT 4G TL can run with any 6MT full bolt on soup to nuts 4G TL any day. Tune or no tune.
Heres a link I'm sure many have come across.

https://hondanews.com/channels/acura...ra-tl-overview

After you read it you will see Acura built our 4G for practical daily spirited driving while keeping gas mileage acceptable and appealing along with 300+ HP. Enjoy your TL for what it is. Not what Psuedo tells us all adds power to our Honda/Acura motors while he drives around in his 500+HP Benz's. I'm not hating. I would never buy a Benz or anything German. Just saying hes comparing AMGs to SH-AWD. Be serious. 4th Gen TLs are awesome and that's why were all here on AZ.
LOL, you do realize that you are talking about a NA Honda engine right? Most honda engine with an I/H/E or PC/JP/E only see at most as 20+ whp gains, but yet they do it. Heck, if you look at the dynos posted on Ktuners site, the TL actually produced the most horsepower in NA form, 09-14 TL ? KTuner, LLC.
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Old 07-11-2019, 05:13 PM
  #129  
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Ok so 25hp and 17ft lbs of tq. That's nothing to brag about like I said I didnt read every post, the cost that some people are averaging it to be around 2k and 100$ per 1.3hp. None of that is accurate buying the jpipe the hfpc and the tune is going to cost alot more plus labor bc let's be honest as much as we all like to say we are DIYers most arent. In my post I said no1 is gaining 30-40 hp let alone anywhere near those torque numbers. I love my 4G and would love to make it faster. The dollar value just isnt there unless you have plenty to spend and in that case you most likely wouldn't be driving a 09-14 Acura TL. I appreciate the feed back and I'm not trying to say anything bad about our cars. I'm just a realist, after investing that type of cash into a 4G then running a G37, 335, or Genesis Coupe and getting burned you realize it's just not worth it.
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Old 07-11-2019, 05:22 PM
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Heres how easy it is to add power to a car that accepts true bolt ons. And yeah the bimmer is a little more expensive. It's the same class and competition. Those are serious power gains for the dollar you spend.

https://blog.stillen.com/2015/06/201...formance-shop/

https://www.armmotorsports.com/Articles.asp?ID=255
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Old 07-11-2019, 10:10 PM
  #131  
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Originally Posted by 4th_GenTLe0260 View Post
Ok so 25hp and 17ft lbs of tq. That's nothing to brag about like I said I didnt read every post, the cost that some people are averaging it to be around 2k and 100$ per 1.3hp. None of that is accurate buying the jpipe the hfpc and the tune is going to cost alot more plus labor bc let's be honest as much as we all like to say we are DIYers most arent. In my post I said no1 is gaining 30-40 hp let alone anywhere near those torque numbers. I love my 4G and would love to make it faster. The dollar value just isnt there unless you have plenty to spend and in that case you most likely wouldn't be driving a 09-14 Acura TL. I appreciate the feed back and I'm not trying to say anything bad about our cars. I'm just a realist, after investing that type of cash into a 4G then running a G37, 335, or Genesis Coupe and getting burned you realize it's just not worth it.
No one is gaining 30 huh? 25 hp with just hfpc, jpipe and ktuner. that's only 5 away from 30. You can't imagine that adding pcd (instead of hfpc), polished runners, throttle body spacer, thermal throttle body gaskets, catback exhaust and lightweight pullys can add another 5 hp combined?

Of course it is a lot of money for little gains but everyone already knows that. You don't mod this car expecting to beat everyone on the streets. Just make it a little more fun.
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Old 07-12-2019, 08:57 AM
  #132  
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Originally Posted by dopeboy1 View Post
No one is gaining 30 huh? 25 hp with just hfpc, jpipe and ktuner. that's only 5 away from 30. You can't imagine that adding pcd (instead of hfpc), polished runners, throttle body spacer, thermal throttle body gaskets, catback exhaust and lightweight pullys can add another 5 hp combined?

Of course it is a lot of money for little gains but everyone already knows that. You don't mod this car expecting to beat everyone on the streets. Just make it a little more fun.
No one is getting 30 with bolt ons? Did u see the links I added above your post on the g37 and 335? They're gaining between 50 and 100+ with bolt ons that cost us the same amount. Yes the Bimmer is FI and that helps alot when you add bolt ons. I understand your argument and your points are valid. Were all here to help each other at the end of the day. After looking at your TL and seeing what you've done to it I think its definitely a badazz ride man. I'm just simply saying the amount of time work and effort for the HP gains isnt justified to me. Everyone is entitled to there opinions. I'm not saying your wrong just that I feel differently. And pseudo is a smart dude. Just easy to tell us all to mod our 4gs when you got the $$$ to ride around in AMGs.
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Old 07-12-2019, 09:34 AM
  #133  
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The proofs in the pudding for me. I did all this stuff with my 3G then turned around and did it all for my 4G. If there weren't solid improvements in the 3G then I wouldn't have invested the time and effort in doing it to the 4G.

I have no regrets whatsoever. If I wasn't going to keep the car long I don't think I'd invest in the mods. But the cost is easily worth it when keeping the car several years.
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