I just installed a GReddy turbo on my Single Cam civic, and im really happy about the results. The thing is, you can start feeling the turbo a little bit at 3 grand, but it realy starts to pull between 4 and 4.5. This seems really high.

I do not have a blow-off valve yet. Could that be contributing to the problem? Or could it be that we adjusted the wastegate to allow more air to pass through to prevent to much boost?

 

Its the turbo, your not getting into the effiecency range of the turbo until that rpm where you really feel it pulling....its the way its gonna be

Trav

 

turbo is to big on the ehuast side. am asuming its not a greddy t-25 turbo. (mitsu turbo.)

 

What is your exhaust set up?

 

greddy use a i believe a mistu style 15G turbo in there kits....and it will have lag as described in the post

 

Do the math, that compressor is beautifull for a ~200whp d series motor. If you have a stock d-series at 6-7 psi then its not going to get efficient till about 160-170whp worth of airflow. SO yeah, 3000 rpm boost on a tdo5 housing and mid 4000rpm power that should last till redline at 6 psi sounds about right.

 

so all in all.... thats the way its gonna be?

 

yup....but you can improve the spool up with a less restrictive exhaust. and do your turbo a favor and get a blowoff valve.

BTW:you are running an intercooler right?

 

get a bov asap ... unless u want to rebuild in a month or two

 

Your wastegate could be hurting your spool up also. Make sure its not bleeding off exhuast until you hit your set boost.

 

i have same issue, B16A+18G greddy turbo and see boost at 4000 rpm, i allways thought it be building boost before that.

 

what exhaust? I have a friend that was getting the same spool times as you. he dropped the exhaust and it dropped almost 1000rpms. with no exhaust it starts to spool at ~2800 and was at full 5-6psi at 3200-3400.

I spooled my t3/t4 on a stock d16z6 by 3700 to 10psi. Thats with a testpipe and a 2.5" turbo to tip exhaust.

liam

 

yah. open up the exhaust system and get a boost controller. on my t3 60 trim... with stock cat and 2.5" catback i saw 6psi @ like 4500rpm. went testpipe... it dropped to about 4k. then i slapped a boost controller on and now i see 10psi by about 3800rpm.

 

The greddy turbo (15G) which is really just a suped up 14G cause Mitsu. didn't make a 15G should start spool at 2G and reach max boost at about 4G.

 

Seems about right, I get full boost at about 4100 rpms with my t3/to4e, .48 exhaust. I also have a cat and 2.5 piping, cat is coming out tomorrow morning, hope to see some spool gains, and maybe a bit more top end.

 

1.) no... im not running and intercooler. just a basic kit.

2.) i have a tanabe racing medallion exhaust.

 

Wow I'm running a t3/t04(don't know exact specs., but it's a drag kit). Starts to spool around 3000, 5psi @4500, 10psi around 5100. No cat and Apexi N1 catback 2.5" with a profec-b. Seems like from what you guys say, I should full boost sooner. Maybe I should play with the profec a little more. Anyone else with the same turbo on nonbuild d16y8?

 

Ya, mine is the same, I use a Turbo smart MBC. Are you internal or external gated? And I have a cat.

 

Im curious what's wrong with the lag? Well for daily driving i understand, but for the streets and strips my feeling is Ill take all I can get. Is this the right way to go about it?

What are your experiences with the amount of lag you have and the traction? I just know that if my turbo were to spool at 2.5-3 id be spinning like mad trhough all my gears.

Just curious
-Dan (ill be finding out the answer soon. I have 2 T3's-> .48 housing and .63 housing to play with.) (2 turbos, 2 IC's, and 2 VAFC's...... talk about dead money )

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_power &raquo;</TD></TR><TR><TD CLASS="quote">Wow I'm running a t3/t04(don't know exact specs., but it's a drag kit). Starts to spool around 3000, 5psi @4500, 10psi around 5100. No cat and Apexi N1 catback 2.5" with a profec-b. Seems like from what you guys say, I should full boost sooner. Maybe I should play with the profec a little more. Anyone else with the same turbo on nonbuild d16y8?</TD></TR></TABLE>

That sounds about what my friends car is like with his drag kit on his Y8. The drag kit has a t3/t04b which is a .63ar i believe. Its just too big for a sohc.

liam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by racinskittle &raquo;</TD></TR><TR><TD CLASS="quote">Im curious what's wrong with the lag? Well for daily driving i understand, but for the streets and strips my feeling is Ill take all I can get. Is this the right way to go about it?

What are your experiences with the amount of lag you have and the traction? I just know that if my turbo were to spool at 2.5-3 id be spinning like mad trhough all my gears.

Just curious
-Dan (ill be finding out the answer soon. I have 2 T3's-&gt; .48 housing and .63 housing to play with.) (2 turbos, 2 IC's, and 2 VAFC's...... talk about dead money )</TD></TR></TABLE>

For drag racing it doesnt really matter. You can overcome lag with nos or a two-step. But for street its nice having a good lowend. Makes the car feel much faster. Dont have to downshift 15 gears on the freeway to spin up the beast under the hood to pass a geo.

My t3/t04e .48ar 46trim was hitting full boost at around 3600 (10-12psi) and i would have major traction problems in 1st and 2nd. But if you just rolled on the gas slow in 2nd it normally would grip.

Personally if i was having traction problems...get a boost controller like the avc-r which can do boost in each gear. So then you can get the max boost in each gear.

liam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by liam821 &raquo;</TD></TR><TR><TD CLASS="quote">
I spooled my t3/t4 on a stock d16z6 by 3700 to 10psi. Thats with a testpipe and a 2.5" turbo to tip exhaust.

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

Was this the 46 trim turbo you just talked about?
What compression were you at?

I'm planning on going with a 57 trim .48 A/R hotside.. hondata/sleeved/9:1 CP's etc.. I just want full boost before 5k at around 15+ psi... Any suggestions Liam?

Thanks

 

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

Was this the 46 trim turbo you just talked about?
What compression were you at?

I'm planning on going with a 57 trim .48 A/R hotside.. hondata/sleeved/9:1 CP's etc.. I just want full boost before 5k at around 15+ psi... Any suggestions Liam?

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

Yea im talking about my 46trim. Personally id recommend a 50trim with a .48ar. Its good for 400whp and its going to spoolup really quick. I dont think a 57trim is gonna hit 15psi by 5k..but a 50trim might.

I recommend you take a look at a precision SC50 .48ar (50trim). Its a sweet turbo.

liam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by liam821 &raquo;</TD></TR><TR><TD CLASS="quote">

Yea im talking about my 46trim. Personally id recommend a 50trim with a .48ar. Its good for 400whp and its going to spoolup really quick. I dont think a 57trim is gonna hit 15psi by 5k..but a 50trim might.

I recommend you take a look at a precision SC50 .48ar (50trim). Its a sweet turbo.

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

Thanks for the advice

 

I have a 57 trim, and I just had by cat taken off this morning. I see 12 psi by 3800 rpm now, 2.5 inch exhaust all the way back. I'm in the process of building up another Y8 for 300whp and I'm sure it will see 15 psi before 5000rpm.