well, first of all i was thinking about super charging my 07 civic si BUT i was wondering how the stock internals would hold up along with the stock valve train. what would need to be done tunningwise? would i need to raise the fuel press? ALSO how in the hell do you change the spark plugs on these bad babies? it is so tight of a fit and i had to pay the dealership 100 dollars to put some new ones in....? if anybody knows a trick to this let me know please. thanxxxx!

 

well heres some help on the spark plugs. u kno that plastic pieve right above the valve cover? well u take that off. theres ur answer. i HATE CHANGING PLUGS. its so much work to do something so simple... i wish i had a d16 (maintenance wise)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i-VTEC_DOHC &raquo;</TD></TR><TR><TD CLASS="quote">well heres some help on the spark plugs. u kno that plastic pieve right above the valve cover? well u take that off. theres ur answer. i HATE CHANGING PLUGS. its so much work to do something so simple... i wish i had a d16 (maintenance wise)</TD></TR></TABLE>

so basically all the plastic that is just below the wipers needs to come off?

 

The comptech S/C will do just fine on a stock motor. I don't think Comptech would risk their rep. over putting out something that would ruin it.

 

I understand changing the spark plugs if you go FI, but why would you want to change them now?

 

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

so basically all the plastic that is just below the wipers needs to come off?</TD></TR></TABLE>

There is another metal plate underneath that holds up the plastic piece. If I remember correctly three or five 10mm bolts and four 12 mm bolts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IT GUY &raquo;</TD></TR><TR><TD CLASS="quote">I understand changing the spark plugs if you go FI, but why would you want to change them now?</TD></TR></TABLE>


well, i got 11k miles on her and the way i feel about changing any stock intake with a aftermarket one is the same way i feel about plugs. with an intake its all about the higher flow as is with the exhaust (header) so if you upgrade everything else why not upgrade the nasty denso plugs with some bosch or ngk?!! you can never go wrong doing so. ALOT and i mean ALOT of people do all kinds of upgrades and mods but tend to neglect the fact that plugs need upgrading too. not only that, but you get a better combustion, the fuel burns more efficient and just better overall performance. everyone asks me why do i want to change them out so soon and i tell the same thing i writing now. this one idiot at a shop actually told me that they are good for 100k and i was like i had my stock plugs changed out from (dirty denso LOL) to bosch and i felt the big difference in idle (smoother) and throttle (crispier). big enough to know that i couldnt and didnt go wrong. i prefer NGK but they didnt have them at the time so i went with bosch.

 

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


well, i got 11k miles on her and the way i feel about changing any stock intake with a aftermarket one is the same way i feel about plugs.

this one idiot at a shop actually told me that they are good for 100k and i was like i had my stock plugs changed out from (dirty denso LOL) to bosch and i felt the big difference in idle (smoother) and throttle (crispier). big enough to know that i couldnt and didnt go wrong. i prefer NGK but they didnt have them at the time so i went with bosch. </TD></TR></TABLE>

If you can feel a "difference" after changing your plugs in your stock car after 11k miles, I think something else is wrong with your car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2008fijibluesi &raquo;</TD></TR><TR><TD CLASS="quote">If you can feel a "difference" after changing your plugs in your stock car after 11k miles, I think something else is wrong with your car.</TD></TR></TABLE>
x2

You can feel a "difference" after changing your plugs if there is a significant amount of miles on them though. For example, the plugs in the '95 Taurus I used to drive didn't get changed until 240,000 miles (not my fault at all). I could definitely feel a "difference" there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chiggin &raquo;</TD></TR><TR><TD CLASS="quote">
x2

You can feel a "difference" after changing your plugs if there is a significant amount of miles on them though. For example, the plugs in the '95 Taurus I used to drive didn't get changed until 240,000 miles (not my fault at all). I could definitely feel a "difference" there.</TD></TR></TABLE>

yeah, 240k is a little longer than the car should go before changing plugs.. lol
I'm sure it did feel better

but, when Honda recommends a spark plug change at 100k per the manual and the OP has only driven 10% of that why does he need to change the plugs on his stock car? "

what is this plug "upgrade" you speak of OP? I hope you know that Honda OEM ignition systems and components are more than capable of providing adequate spark to your bolt-on car. Those Densos aren't bad plugs at all (dirty does not = bad) In fact you may have downgraded with the Bosch plugs. Which ones did you use?

06+ si spark plugs (oem part #)
Denso info on plugs from the Si

 

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

yeah, 240k is a little longer than the car should go before changing plugs.. lol
I'm sure it did feel better

but, when Honda recommends a spark plug change at 100k per the manual and the OP has only driven 10% of that why does he need to change the plugs on his stock car? "

what is this plug "upgrade" you speak of OP? I hope you know that Honda OEM ignition systems and components are more than capable of providing adequate spark to your bolt-on car. Those Densos aren't bad plugs at all (dirty does not = bad) In fact you may have downgraded with the Bosch plugs. Which ones did you use?

06+ si spark plugs (oem part #)
Denso info on plugs from the Si

</TD></TR></TABLE>

my car is not stock. i got some mods done to it. and denso isnt that bad of a plug but there are better ones out there. I GUARANTEE that if you change out your plugs with some better ones YOU WILL feel a difference. just becasue "honda" or the manual say that you can go 100k or so with out changing them does not mean to do it. if you are a soccer mom or baseball dad driving a van or if you are a grandma driving an 08 si then ok maybe BUT WE ARE NONE OF THOSE!!! we dont drive like them. look, i kept my denso plugs and compared them and there was somewhat of carbon on them but absolutely NO wear. so yeah, you are right about them not being bad, but you can never go wrong with upgrading them. it is no joke when i say that you can feel a difference. its just like when you compare oils: conventional doesnt protect persay or last as long- synthetic does but to a certain extent. therefore everyone wants synthetic cause it feels better on the engine and last a little longer. as to say the same about plugs, a better and different brand will feel better on the pedal and overall feel of idle and such, compared to a lesser quality plug that wont feel and precise on the pedal and/or performance in general. and i dont say or argue this just cause im a mechanic but i speak of all this in experience. im not trying to bash anybody either

 

Denso actually recommends changing the plugs in the Si every 30k miles. It states on their website that they are a performance. IT GUY is correct in saying that you may have actually downgraded going to the Bosch. The Denso Iridium are very good plugs.

I believe you, when you say you felt a difference. What I am saying is; if you did feel a difference (after only 11k on the Denso's), there may be something wrong with your car. The ignition system in these cars is plenty powerful, to provide smooth idle, acceleration, etc (just like stock) with the usual mods.

 

what mods OP? bolt-ons?

what Bosch plugs did you use? (asking for a 2nd time)

 

from 2008fijibluesi------"IT GUY is correct in saying that you may have actually downgraded going to the Bosch. The Denso Iridium are very good plugs.

I believe you, when you say you felt a difference. What I am saying is; if you did feel a difference (after only 11k on the Denso's), there may be something wrong with your car. The ignition system in these cars is plenty powerful, to provide smooth idle, acceleration, etc (just like stock) with the usual mods.[/QUOTE]


well, denso may say this and that on its website but just cause it says what it says doesnt mean that they are the best. there are better plugs out there. and personally i would say that ngk is the way to go. if you or who ever is all about about performance then yall would know to change out the factory or lesser plugs with ngk or something that it just as good. they are the #1 recomended plugs for cars like ours also cause they are iridium adn designed for high performing engines boosted or not. honda highly recomends iridium plugs. thats why i say that there is nothing wrong with denso iridium NOR is there anyting wrong with going with a better brand. and a better brand means better quality. theres absolutely no way that i downgraded by going with a better plug. its still within specs and burns more efficient. its a proven fact. i did my research through the dealership, experience and through other sources and they told me pretty much the same things that i am stateing here. i even got my car checked by them to see if there was something wrong with the motor internally and/or externally and it was in tip top shape. i asked them before i put the plugs in if i would benefit from it and they said that i would somewhat feel a difference in idol and throttle response. which is exactly what i said before. being that our cars are DBW throttles i was kinda iffy about the pedal feel and thats what started this whole mess about changing the plugs.

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

what Bosch plugs did you use? (asking for a 2nd time)</TD></TR></TABLE>


mods............aem cai - 4-2-1 dc rh with test pipe and straight through pipeing all the way out - underdrive crank and alternator pulleys - comptech short shifter and eibach sportline springs. and as for plugs i went with bosch ir fusion. im in upstate NY close to the canadian border and since i have changed to these plugs i get better cold starts here. it gets in the negatives keep in mind.....