i am having a problem with finding out what is the most boost that i can apply to my engine with out hurting it. i understand that its hard on it i just don't want to blow it up. Greddy told me not to uses more than 7psi i was told the turbo comes with 8psi. i have spoke with a couple other performance shops and they have told me as high as 12psi. so im really in the dark. please help me.


PS: im not looking to do and internal engine work, like pistons or arms.

 

7 or 8psi is the highest you should go on a stock motor. Any higher will put excess stress on internal components and usually people build up their motors (pistons, rods) to withstand the higher psi

 

I would "guess" that you could be safe around the 10-12psi range. Only if it is tuned very, very well.

I am not sure of the stoutness of the K motor in your ride. But the D-series will take 12psi, tuned correctly, and love it. Seen one making 235whp and 185tq.

The max psi you can run on that turbo period is around 20-23psi.

 

thanks for the replys, but still as you can see im still in the same situation i have one person telling me that its ok to take the boost up to 10-12 psi and another person in telling me that i should leave it at 7 or 8 psi. does anyone of any body that has blown a motor with 10-12psi?

i now have another question for you i wasn't told that there was a break-in period on the car i was told i could drive it any way that i want to. last night i was reading some of the other questions and replys that other people had, and come to find out there is a break-in period (page 110 of the owners manual). i have contacted the service department at the dealership and they told me that i would be fine, just not to hold the car at steady speeds for long distance. i only have approx 250 miles on the car. my question is have i hurt the car or should i be ok. (i plan on taking it easy in-tell i reach 600 miles witch is recommended in the owners manual) thank you for you assistance all of your replys are helpful.

 

you know, since your so unsure about the boost, why dont you be safe and do 8 psi, and have it well tunned, you will have a quick car and it will be on the safe side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kikiboi &raquo;</TD></TR><TR><TD CLASS="quote">you know, since your so unsure about the boost, why dont you be safe and do 8 psi, and have it well tunned, you will have a quick car and it will be on the safe side. </TD></TR></TABLE>

better safe then sorry.

 

8-8.5psi should be your max, well tuned.
10psi can be done IMO if you have 550cc injectors, aftermarket fuel pump, using K-pro.
12psi without a block build, is out of the question in my book.

 

get hondata

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg_nezay &raquo;</TD></TR><TR><TD CLASS="quote">8-8.5psi should be your max, well tuned.
10psi can be done IMO if you have 550cc injectors, aftermarket fuel pump, using K-pro.
12psi without a block build, is out of the question in my book.</TD></TR></TABLE>

you can get 12 psi out of it if you know what your doing. !! i'll be runing 10 daily, and 12 at the track !!

 

is that with motor work like pistons and rods, or stock civic SI

 

stock si

 

so do you or anyone else for that matter know then how much whp you can get with 7-8psi on a k20? Also how much that would maybe run for with tuning.

 

like to have a turbo installed

 

thats bad *** i just don't have the money if i blow my engine ski high. so im thinking about doing big pistions and rods. does anybody know what the max HP is if i do that 4" rods and pistions could i do i NOS and turbo?????/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the blue monster &raquo;</TD></TR><TR><TD CLASS="quote">thats bad *** i just don't have the money if i blow my engine ski high. so im thinking about doing big pistions and rods. does anybody know what the max HP is if i do that 4" rods and pistions could i do i NOS and turbo?????/</TD></TR></TABLE>

Dude, your still wondering. Let me tell you this, first of all, rebuilding a block, engine in general is going to cost you a lot of money, second of all since your engine is pretty new, i am sure it does not have a lot of miles just put the turbo kit and get it tunned.

Your talking about not wanting to spend a lot of money on a blown engine, but if your thinking about rebuilding, then it makes no sence why you would care if your engine is going to blow.

just go to a reputable shop in your area, show them you have 8000+ to blow on your engine and they will do there best job.

 

thanks for all of your help i have gotten my answer now if anybody can tell me how to get this add of this sight i would be more than happy to remove it thanks again
the blue monster

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HaTcH_BmX_Ep3 kid &raquo;</TD></TR><TR><TD CLASS="quote">you can get 12 psi out of it if you know what your doing. !! i'll be runing 10 daily, and 12 at the track !! </TD></TR></TABLE>


Very doubtful you know more than Kenji from Greddy and Doug @ hondata.
Be my guess running 12psi on a stock block, let us know how it is in a few months, I mean , weeks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LBSolagger &raquo;</TD></TR><TR><TD CLASS="quote">so do you or anyone else for that matter know then how much whp you can get with 7-8psi on a k20? Also how much that would maybe run for with tuning.</TD></TR></TABLE>

These are my results with a k20a3
Finally had a chance to dyno my kit and these where the results.



1)180 whp / 160 ft-tq @ only 6psi and 100+ degree weather in the shop! Also no IC


2) Dyno numbers with just the add on of the IC and still at 6.5psi back then were, 215whp and 200 tq.


3) NEW DYNO #S WITH THE HELP OF HONDATA 231.1whp/208.5tq and still at 6.5 psi.


4)It made 260whp/224tq @ 8psi

 

All in all, did the Greddy Kit end up costing the same as other kits such as Revhard or Cybernation?

 

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


Very doubtful you know more than Kenji from Greddy and Doug @ hondata.
Be my guess running 12psi on a stock block, let us know how it is in a few months, I mean , weeks. </TD></TR></TABLE>

im not gonna tune it !!
i'll let you know by that time how the motor runs !!

 

Ok, lets start over.

The original Q was, "what is the most psi i can run on a 04 civic si using greddy turbo?"

and your reply was,

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HaTcH_BmX_Ep3 kid &raquo;</TD></TR><TR><TD CLASS="quote">you can get 12 psi out of it if you know what your doing. !! i'll be runing 10 daily, and 12 at the track !! </TD></TR></TABLE>

Sticking with the question, how are you so sure if you havent even done it? I know you havent done it because you said , " Ill be running...."

You should enlighten us on how this could be done, I wouldnt mind running 12psi on a stock block at the drag races y0!.

In spite of everything, it should be explained on how it can be accomplished, just for the fact that you'll give some kids your data and end up having a rod hanging from their block.

 

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


Very doubtful you know more than Kenji from Greddy and Doug @ hondata.
Be my guess running 12psi on a stock block, let us know how it is in a few months, I mean , weeks. </TD></TR></TABLE>

I know a guy that has been running a bone stock D-16 Y-8@12 PSI for two years, and its his daily driver.

 

Yea, and the D series and K series are the same, right?
Im sure he is using the same emanage and returnless fuel line right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg_nezay &raquo;</TD></TR><TR><TD CLASS="quote">Yea, and the D series and K series are the same, right?
Im sure he is using the same emanage and returnless fuel line right?
</TD></TR></TABLE>

look man.. all I am saying is that you can run 12 PSI on a stock D-series... you know the weakest Honda motor... Seems to me that a K series would be able to take at least that much abuse. You seem to forget that its detonation, not boost that kills motors.

Oh,, and for the record.. the D 16 Y8 has a return line in its fuel system, The only D series with out a return line is the D-17.

 

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

I know a guy that has been running a bone stock D-16 Y-8@12 PSI for two years, and its his daily driver.</TD></TR></TABLE>my brother knows a mailman with a b16 in his mailtruck that runs 8psi and he drives it almost everyday. he doesnt drive on sundays, well because there isnt mail delivered on sundays. but, i guess k series, d series, and b series are all the same right? that isnt the point but anything higher than 7-8 you are gonna blow something unless god built your motor on the 7th day after he made your brain