Hey All,

Any advice would be greatly appreciated on my possible build for my SI in order of installation:

1. Air Intake - any suggestions on which company is good. I will not be going for a CAI because i'm afraid that water will go into the engine.

2. Exhaust - Going to wait until they come out with the Greddy SP2 system. hopefully they will come out with one.

3. Header - Do all headers remove the catalytic converter? Is there a header that doesn't remove the converter? I don't want to deal with the check engine light and all.

4. Hondata heatshield.

5. Hondata ECU reflash.

What do you seasoned professionals think? How much on average will I gain from this build? Would I be able to install a supercharger down the road with all these bolt ons in place?

Thanks for all your help.

 

https://honda-tech.com/zerothread/1943086
^^ sound clips for exhaust....incase they dont come out with what you want

Search for intake. its been discussed a million times. There all the same, except for AEM, it has issues.

Bolt ons dont do much, but the hondata reflash will help

 

1. Air Intake - any suggestions on which company is good. I will not be going for a CAI because i'm afraid that water will go into the engine.

>> I'd go Fujita SRI if I had to go with an SRI. However, I would personally go with the Injen CAI and a hydoshield to protect against water damage.

2. Exhaust - Going to wait until they come out with the Greddy SP2 system. hopefully they will come out with one.

>> The SP2 is out I beleive.

3. Header - Do all headers remove the catalytic converter? Is there a header that doesn't remove the converter? I don't want to deal with the check engine light and all.

>> Some guy over on 8thcivic just put the Buddy Club RH with a high-flow cat, and he got no CEL with that.

4. Hondata heatshield.

>> No comment

5. Hondata ECU reflash.

>> Get it after you have a minimum of an intake/RH/exhaust. This will prolly provide the most significant gains other than the RH. Sooner VTEC window can only be good.

What do you seasoned professionals think? How much on average will I gain from this build? Would I be able to install a supercharger down the road with all these bolt ons in place?

I'd guess somewhere in the range of 210-220 WHP with all that on there. I'm pretty sure all those parts would be used with the SC. The only thing that would change would be you getting a different reflash.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elohel &raquo;</TD></TR><TR><TD CLASS="quote">
5. Hondata ECU reflash.

&gt;&gt; Get it after you have a minimum of an intake/RH/exhaust. This will prolly provide the most significant gains other than the RH. Sooner VTEC window can only be good.
</TD></TR></TABLE>

Hondata's website states:
"You must have a minimum of an intake or header"

you don't have to have i/h/e, just one of the three to net gains

 

if your planning on supercharging. Dont wast your $ on reflashing.
a custom reflash will have to be done with your blower from Hondata.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type X &raquo;</TD></TR><TR><TD CLASS="quote">if your planning on supercharging. Dont wast your $ on reflashing.
a custom reflash will have to be done with your blower from Hondata.</TD></TR></TABLE>

unless you're planning on running k-pro when it comes out. having the reflash gets you a discount on k-pro... and it sounds like the OP won't be supercharging anytime real soon.

 

why are people so afraid of water with a cai?
has this acually ever happened to anyone? if there was that much water out, i wouldn't be driving the car anyways........

ive always ran cai's......... and never had any problems.

 

If Install I/H/E, would it save more gas or use more?

 

What kind of Issues does AEM have? I was thinking about getting AEM CAI with bypass valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by seed2harvest &raquo;</TD></TR><TR><TD CLASS="quote">why are people so afraid of water with a cai?
has this acually ever happened to anyone? if there was that much water out, i wouldn't be driving the car anyways........

ive always ran cai's......... and never had any problems.</TD></TR></TABLE>


better safe than sorry

 

I've pulled apart more than one d-series and b-series that met their end from hydrolock. it can end up looking downright nasty.. I've seen rods twisted and bearings spun.

 

hmmm.......
interesting.
thank god im in cali and we dont rain heavy......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by llckll &raquo;</TD></TR><TR><TD CLASS="quote">What kind of Issues does AEM have? I was thinking about getting AEM CAI with bypass valve.</TD></TR></TABLE>

AEM CAI's no longer have issues. The original AEM CAI for the 06+ civics had a CEL issue. AEM has since redesigned their CAI's and they no longer have any issues.

Most people will say get the Injen CAI because it will yield better whp. Personally, I'd rather go with the AEM since they have those nice DryFlow filters. If I do end up spending money on an intake I'm going to wait for Comptech to make one. I'd rather see a noticeable increase in HP in the midrange where I do most of my driving rather than at redline which my car sees once a week at most.

 

i dont really consider that a "build" but... thats just me.

 

I sucked in water through my aem cai in my ex, so much the engine started dying.

Cut off the car, got it towed to my house the next day. Drained the oil, pulled the plugs and turned it over a few times to squirt out the water. Refilled the oil, changed the plugs and it ran fine . 160k miles on it now ans still no problems. I know this is probably me getting VERY lucky oh well.

I personally am oging to wait for the comptech Ice box to come out and pick it up asap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IT GUY &raquo;</TD></TR><TR><TD CLASS="quote">

Hondata's website states:
"You must have a minimum of an intake or header"

you don't have to have i/h/e, just one of the three to net gains</TD></TR></TABLE>

Sorry about the confusion, I meant that like you need an intake / (or) RH / (or) exhaust. My bad in wording that wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ouija &raquo;</TD></TR><TR><TD CLASS="quote">
If I do end up spending money on an intake I'm going to wait for Comptech to make one.</TD></TR></TABLE>
I think Comptech has already thrown in the towel man, we wont be seeing any more products from them.

llckll , we have built two Si Sedans already and we have done a lot of work on other FG's and K series Motors. As far as the exhaust goes, Legal speed designs is the only one who makes a full catback as of now. You can check out some videos and sound clips at http://www.legalspeeddesigns.com . As far as headers go, The DC header is catless, but does fit nicely and isnt to expensive with all things considered. Hytec and Buddy Club should have one out in the very near future if you want something built a little more agressive. Intake is a tough decision on this car, although you wont see much of a deviation in power from one to the next. If you want a shortram, i would say the main factor at hand would be the actual look and filter quality. AEM is tough to compete with in these categories. The Hondata Heatshielf a Reflash get a big thumbs up . All in all, with the type of build your going for, expect to gain anywhere from 35 - 50hp. We are going to be dynoing ours again very soon, so we will keep you posted. The exhaust alone yielded 13.5 HP. Feel free to shoot us an email or pm with any other questions you may have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSD Motorsports &raquo;</TD></TR><TR><TD CLASS="quote">
I think Comptech has already thrown in the towel man, we wont be seeing any more products from them.

llckll , we have built two Si Sedans already and we have done a lot of work on other FG's and K series Motors. As far as the exhaust goes, Legal speed designs is the only one who makes a full catback as of now. You can check out some videos and sound clips at http://www.legalspeeddesigns.com . As far as headers go, The DC header is catless, but does fit nicely and isnt to expensive with all things considered. Hytec and Buddy Club should have one out in the very near future if you want something built a little more agressive. Intake is a tough decision on this car, although you wont see much of a deviation in power from one to the next. If you want a shortram, i would say the main factor at hand would be the actual look and filter quality. AEM is tough to compete with in these categories. The Hondata Heatshielf a Reflash get a big thumbs up . All in all, with the type of build your going for, expect to gain anywhere from 35 - 50hp. We are going to be dynoing ours again very soon, so we will keep you posted. The exhaust alone yielded 13.5 HP. Feel free to shoot us an email or pm with any other questions you may have.</TD></TR></TABLE>

A couple comments/questions:

1. Last I heard (from Nate at Comptech), is that Comptech is back producing and building stock on their products. If someone has heard something else, please speak up.

2. When you say 13.5hp in exhaust, can I assume you are referring to the header as well as the cat-back? Cat-back alone is not going to provide those kinds of gains. At least, no cat-back I have seem has produced anything close.

One thing to keep in mind, a race header that eliminates the cat, or tacking a high flow cat on race header, will not pass smog in California. Course, I can't tell if the op is from CA or not, but I thought I should point this out.

Thanks for the clearification.

 

in addition, the buddy club and hytech headers are already out... and I don't know how you build something more "aggresive" (like you said in your post) than those headers.

AEM has had fitment issues and CEL issues with this car and have offered replacements to those who have had issues (decent customer service).. I wouldn't say they were exactly tough to compete with these days, quality control seems to have suffered in the past year or two

also, hondata claims a 10-25hp increase... I don't know what you're doing to get 35hp minimum out of the reflash. You say you've seen up to 50hp increases on the reflash? I wouldn't mind seeing a dyno sheet of that

 

Why does everybody here say CEL instead of MIL (malfunction indicator lamp). i work at a GM dealer and that is the proper term for it. is CEL (im assuming "check engine light") the proper term from honda or is that just some honda-tech slang?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">

A couple comments/questions:

1. Last I heard (from Nate at Comptech), is that Comptech is back producing and building stock on their products. If someone has heard something else, please speak up.

2. When you say 13.5hp in exhaust, can I assume you are referring to the header as well as the cat-back? Cat-back alone is not going to provide those kinds of gains. At least, no cat-back I have seem has produced anything close.

One thing to keep in mind, a race header that eliminates the cat, or tacking a high flow cat on race header, will not pass smog in California. Course, I can't tell if the op is from CA or not, but I thought I should point this out.

Thanks for the clearification.

</TD></TR></TABLE>
I think you might be right, perhaps they are being bought by another company or have been bought, i remember hearing they were up for sale. honestly, i was shocked myself to see the gains we did with just the exhaust alone. This was a dyno run with stock exhaust and then switched to the 2.5" and there was a difference of 13.5HP. It was dynoed at bisi moto engineering, feel free to check with him or i could post the dyno chart. Good to of you to point out the smog issue for CA drivers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IT GUY &raquo;</TD></TR><TR><TD CLASS="quote">in addition, the buddy club and hytech headers are already out... and I don't know how you build something more "aggresive" (like you said in your post) than those headers.

AEM has had fitment issues and CEL issues with this car and have offered replacements to those who have had issues (decent customer service).. I wouldn't say they were exactly tough to compete with these days, quality control seems to have suffered in the past year or two

also, hondata claims a 10-25hp increase... I don't know what you're doing to get 35hp minimum out of the reflash. You say you've seen up to 50hp increases on the reflash? I wouldn't mind seeing a dyno sheet of that</TD></TR></TABLE>
You probably just misunderstand what i typed man, im saying that buddy clubs header was going to be out soon, i checked last week and none were available. When i said if you want "something built a little more agressive" i was referring to buddy club and Hytec being that compared to DC Sports. The AEM products arent far superior by any means as far as fitment or actual gains, i just stated the powder coating and filters were good quality. The SRI we have seen and installed here havent had any problems so im just speaking from "our" experiences. Lastly, if you re-read what i wrote about the 35-50whp gains, i said from the type of build you are going for, you can expect to see those gains. That means from the intake, exhaust, header, heatshield and hondata reflash.

 

understood.. thanks for clarifying

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IT GUY &raquo;</TD></TR><TR><TD CLASS="quote">understood.. thanks for clarifying </TD></TR></TABLE>
No problem, i didnt write that very well so i can see how it could be confusing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">
One thing to keep in mind, a race header that eliminates the cat, or tacking a high flow cat on race header, will not pass smog in California. Course, I can't tell if the op is from CA or not, but I thought I should point this out.
</TD></TR></TABLE>

What is CA's deal with the smog thing. In CT, new cars (1996+) use OBD tests. If that fails then a tailpipe test is done. But as long as there is a Cat (visually inspected) if the computer says it's ok it's legal (fool the computer ftw).