I have searched for a few hours (no kidding) on H-T regarding turbo'd JDM ITR motors. I came up with either USDM ITRs boosted or "comments" on turbo setups, how its not going to work. I just want to see if anyone has seen/heard/done a turbo setup on a jdm itr motor, low boost of course. I am a little hesitant 'cause of the obvious, COMPRESSION RATIO. Not sure if I want to run a thicker HG, 'cause that would mean more boost.

I will only want to boost 7 psi max. What I will be running:

- '99 spec jdm itr motor
- Full race type manifold
- T3/T4 hybrid .59 trim
- RC 750cc injectors, people ask why so large. %30 duty cycle rather then %80 with 550s.
- Holley intank fuel pump FI application
- Hondata s200
- Tial 38mm WG


Thanks for any input, and once again... I DID SEARCH!!!!

 

lies. you didnt search.

 

750's for 7psi...if u want only a 30% duty cycle at WOT, its a waste of money.

if its a 99 spec jdm itr, that compression ratio is up there, and so is the overlap.

you'll make some peaky power. my friend turbo'ed his 98 spec itr a while back, and it didnt last too long. fried 3 sets of piston rings gradually until his car didnt start. although it was a drag III kit with an FMU and stock injectors...so maybe with a good tune and fuel management, it wouldnt have had died so shortly...

he went back to his NA is best mentality.

with a hi comp ratio, tuning is more critical, and much less forgiving to error.

if i had a 99 itr engine, i would leave it NA. a big reason i went turbo, is because i have an LS. read my sig, it explains my mentality.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spec R &raquo;</TD></TR><TR><TD CLASS="quote">750's for 7psi...if u want only a 30% duty cycle at WOT, its a waste of money.


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

It's not like the 750's are that much more than the 550's. What if your plans change?

Sell the ITR and get a GSR. GG

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spec R &raquo;</TD></TR><TR><TD CLASS="quote">750's for 7psi...if u want only a 30% duty cycle at WOT, its a waste of money.

if its a 99 spec jdm itr, that compression ratio is up there, and so is the overlap.

you'll make some peaky power. my friend turbo'ed his 98 spec itr a while back, and it didnt last too long. fried 3 sets of piston rings gradually until his car didnt start. although it was a drag III kit with an FMU and stock injectors...so maybe with a good tune and fuel management, it wouldnt have had died so shortly...

he went back to his NA is best mentality.

with a hi comp ratio, tuning is more critical, and much less forgiving to error.

if i had a 99 itr engine, i would leave it NA. a big reason i went turbo, is because i have an LS. read my sig, it explains my mentality.</TD></TR></TABLE>

Well, the 750s are the same price as 550s (this is a kit my friend is building).

I am hoping hondata would be good enough for tuning.

What about running an inlinepro headgasket, which is 2mm thick, at 7psi. Any thoughts on that?

 

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

It's not like the 750's are that much more than the 550's. What if your plans change?

Sell the ITR and get a GSR. GG </TD></TR></TABLE>

The GSR is still in the backyard.

 

if your at 80% with the 550's then thats perfect...dont try to idle a larger injector then you need to...
but your not going to even reach 80% with 550's...those will be to big...
at 300bhp with a bsfc of .65 (which is rather high) youll need 39lb injectors
39lb injectors = about 410cc's
a set of 440's would do you good...
or if your on a budget a set of dsm injectors would work they are 450cc and rather cheap..can usually get a set for about 100-130


Modified by 2k.civic.si at 8:59 AM 4/9/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2k.civic.si &raquo;</TD></TR><TR><TD CLASS="quote">if your at 80% with the 550's then thats perfect...dont try to idle a larger injector then you need to...
but your not going to even reach 80% with 550's...those will be to big...
at 300bhp with a bsfc of .65 (which is rather high) youll need 39lb injectors
39lb injectors = about 410cc's
a set of 440's would do you good...
or if your on a budget a set of dsm injectors would work they are 450cc and rather cheap..can usually get a set for about 100-130

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

Thanks for the numbers. Either way, I will have enough fuel.

Maybe you can round up some more numbers for me. If I were to get a 2mm headgasket, where would that put me... 9:8?

Thanks. LOL.

 

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

Maybe you can round up some more numbers for me. If I were to get a 2mm headgasket, where would that put me... 9:8?

Thanks. LOL.
</TD></TR></TABLE>

THat'll put you at a $4500 GSR motor with a red valve cover.

 

running larger then needed injectors will comprimise idle and partial throttle driveability and there is other reasons i dont feel like explaining.... im currently down here in san diego at efi university taking classes i wouldnt argue with me while the info is fresh in my head

http://www.efi101.com ....after tommorow ill be efi certified im currently being taught by ben strader the senior instructor at efi

 

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

THat'll put you at a $4500 GSR motor with a red valve cover. </TD></TR></TABLE>

i know you guys know each other and joking around and know that an ITR is more than just a GSR with higher compression, but yeah...if he has a gsr lying around...booost that instead...

edit - i reread your first post.

i guess not too many people who have 98-up spec ITR's have gone turbo. all i know is my friend from a few years back killed his engine...but thats because he was still using his NA fuel and ignition (too aggressive for boost) maps.

 

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

Thanks for the numbers. Either way, I will have enough fuel.

Maybe you can round up some more numbers for me. If I were to get a 2mm headgasket, where would that put me... 9:8?

Thanks. LOL.
</TD></TR></TABLE>

around 9.5:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2k.civic.si &raquo;</TD></TR><TR><TD CLASS="quote">

around 9.5:1</TD></TR></TABLE>

Thanks.



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

i know you guys know each other and joking around and know that an ITR is more than just a GSR with higher compression, but yeah...if he has a gsr lying around...booost that instead...

edit - i reread your first post.

i guess not too many people who have 98-up spec ITR's have gone turbo. all i know is my friend from a few years back killed his engine...but thats because he was still using his NA fuel and ignition (too aggressive for boost) maps.</TD></TR></TABLE>


Yea, Ling likes to fuuck with me since I am ALWAYS undecided on what I want to do, even eating somewhere. HAHAHAA.

The GSR setup is sold, just holding it until he gets back from overseas.

Also, SPECR: NA has crossed my mind and was actually my original plan. Fully built head, PNP. I have never had a turbo car, so I wanted to try something new. Turbo or NA will cost me about the same.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dut &raquo;</TD></TR><TR><TD CLASS="quote">
Also, SPECR: NA has crossed my mind and was actually my original plan. Fully built head, PNP. I have never had a turbo car, so I wanted to try something new. Turbo or NA will cost me about the same. </TD></TR></TABLE>

yeah i started off with an LS, so its different for me. swapping out my LS for an ITR swap would be 4500 or so, then turbo-ing that would be an addition 2000 bucks...it doesnt seem too logical financially, when i can have one bad *** built turbo LS for 6500, if i ever decided to spend that much.

Have you ever been in a WRX, STi, Evo, or Turbo honda before?

 

I would put a low cr hdgasket to help bring down the c and boost it to 12 psi

 

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

yeah i started off with an LS, so its different for me. swapping out my LS for an ITR swap would be 4500 or so, then turbo-ing that would be an addition 2000 bucks...it doesnt seem too logical financially, when i can have one bad *** built turbo LS for 6500, if i ever decided to spend that much.

Have you ever been in a WRX, STi, Evo, or Turbo honda before?</TD></TR></TABLE>

Yes, I have been in a few turbo hondas and it felt great. My friend has a nice EVO9 and I have only raced it with my m3.

 

here are my results @ 6psi on mustang dyno

jdm gsr motor

jdm itr pistons- 11.3 cp

sp manifold
skunk2 im
jdm itr tb
precision sc-61 turbo
3 inch dp
tial 38 mm wg
precision ic
aem fuel rail
aeromotive fpr
walbro fp
act hd clutch
ctr crank pulley
ctr camshaft
rc 550 cc injectors
hondata s300

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1Quikgsr &raquo;</TD></TR><TR><TD CLASS="quote">here are my results @ 6psi on mustang dyno

jdm gsr motor

jdm itr pistons- 11.3 cp

sp manifold
skunk2 im
jdm itr tb
precision sc-61 turbo
3 inch dp
tial 38 mm wg
precision ic
aem fuel rail
aeromotive fpr
walbro fp
act hd clutch
ctr crank pulley
ctr camshaft
rc 550 cc injectors
hondata s300

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

Nice. Sounds similar to the **** I would be using, turbo kit wise.

 

i hate to tell you this, but that is an INaccurate reading of HP on an MD dyno. your HP@50mph should not be 9.5, or 9.o...............

it should be 15-16.0


this is how people convert or "skew" numbers on an MD dyno, almost 300hp on 6psi is a little high in my book, and the HP# is a dead giveaway

 

Why dont you just pull the head and install a slightly thicker headgasket and rid yourself of the high compression worries?

 

if i were you i would sell the ITR and boost the f@%k outta that GSR with the money

 

Stay with the itr. its better then the Gsr in every way. You dont even have to add a thicker headgasket, Aslong as you have the proper fuel and tuner you will be fine.

 

talk to TurbodCX... he has a 99 JDM ITR stock motor
taken from his sig...

99 JDM ITR Swap
PT 70
AEM EMS
631whp/4016wtq@21psi(Stock Motor!!)
10.51@140.58 w/ 1.67 60'

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SPOON_BeIgHtEeNsEe &raquo;</TD></TR><TR><TD CLASS="quote">talk to TurbodCX... he has a 99 JDM ITR stock motor
taken from his sig...

99 JDM ITR Swap
PT 70
AEM EMS
631whp/4016wtq@21psi <FONT SIZE="4">(Stock Motor!!)</FONT>
10.51@140.58 w/ 1.67 60' </TD></TR></TABLE>

Uh.... WTF.

 

i wonder how long its been running. Oh and the compression ratio will be 9.78-8:1 with the 2mm headgasket