ok guys, i have a little problem, i was looking at my dyno and thinking, from 5400 till 7400 im making right at 300whp, like steady, which makes no sence, no matter what we would do we could get the torque to go up but NEVER the horsepower unless we leaned it out really far...

here is the dyno if u havent seen it in the other thread...


ok now the problem, im running a streetimports 18x9x2.5 fmic and they claim it flows UP TO 500cfm, which should make it good for 350 CRANK hp...

have any of you experienced a problem like this before??? i never really thoguht about maxxing out the flow of my intercooler?! any thoughts would be nice, before i go out and buy a new precision or something...

right now i switched this this fmic that i had lying in the garage...
http://cgi.ebay.com/ebaymotors...sting

they claim its good to 500 crank hp, but who knows with it being from ebay...

thanks for any insight...

 

what's the setup? motor, turbo, etc.

 

d16z6 ttrods vitara pistons, 680 injectors, turbonetics t3t04e 57 trim, drag mani, zex 59300 cam, manual cutout, turbosmart mbc, 2.5" ic piping, tial knockoff 38mm wastegate, tial 50mm bov...

 

is it holding boost? possible leaks?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TypeSLO &raquo;</TD></TR><TR><TD CLASS="quote">is it holding boost? possible leaks?</TD></TR></TABLE>

first thing that came to mind....how bigs the downpipe? exhaust? do you have a cat?

 

nope boost is falling off in the top end, but their are NO boost leaks, i check every pipe for leaks OFF the car, then put it on and pressure check it again on the car...

no cat, and 2.5 downpipe to open cutout on the dyno pulls...

 

what do you mean the boost drops off at top? and did you check the wastegate flange and turbo flange? you'll lose power if you're leaking there.

 

everything was fine, it was the fact that my intercooler only flowed 500cfm and i was obviously putting down more htan that!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jarvis199 &raquo;</TD></TR><TR><TD CLASS="quote">everything was fine, it was the fact that my intercooler only flowed 500cfm and i was obviously putting down more htan that! </TD></TR></TABLE>

get a yonaka intercooler. cheap and reliable. two things that SHOULDN'T be in the same sentence. but they are marvelous.

 

ive seen too many people making 400whp on ebay ic's to pay too much for one, im trying to keep this car under $5000 total and still make power and make it last, u can have cheap, reliable, fast, to a point...

 

ever think of going with a 3'' dp might be restricting flow there

 

It won't hold boost...you have a shitty wastegate... 1+1=2

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted-Hatch &raquo;</TD></TR><TR><TD CLASS="quote">
cheap and reliable. two things that SHOULDN'T be in the same sentence </TD></TR></TABLE>

ha!!!!new sign

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboJesse &raquo;</TD></TR><TR><TD CLASS="quote">It won't hold boost...you have a shitty wastegate... 1+1=2 </TD></TR></TABLE>

That'd be my first guess as well.

 

well obviously i had a problem, since i picked up afr's like i did, i mean seems like common sence to me, i changed nothing in the setup other than the fmic, same boost level, and went from mid 11's to high 12's to 13 flat...

anyway, ive taken apart a few wastegates, and i dont see what cuold screw up, this wastegate is pretty much the same design as the tial, the insides look identical...

anyway, i could see a cheap wastegate causing spike, but drop??? i figured the only other part of the wastegate that could be causing this is the diaphram, so i ordered a tial replacement one to put in my cheap tial knockoff...

that means the only thing that ISNT tial in my wastegate is the valve itself and the housing, all moving parts will be tial, so ill see how much difference this makes...

 

i'd be willing to bet your Chinese wastegate is losing boost up top....

 

you may be correct, so i ordered a new tial wg diaphram to put in it... sot hat all moving functioning parts in this wg are tial now...

and honestly their are several high hp people running thsi same wg without trouble, and ive heard of hte same problems with tials 38mm's... so im not going to blame my cheap purchase for it...

 

but dont you think the downpipe mgiht be a little restrictive? besides the whole wg problem.

 

you may have replaced all the parts with Tial parts, but i wouldn't have ever bought anything except Tial in the first place....also 3" dp would have helped a lot

I'm not a D series expert, but is the head restricting it at all??

 

the head shouldnt be a problem at this hp level, since it hasnt been a problem for many other d's making 400whp...

but yes, a 3" downpipe is most likely going to be my next addition, or at least 3" to the cutout...

and i know, if i could go back i would just buy a tial in the first place, but at the moment with a kid on the way, with a tial knock off wiht all tial guts,seems to me to be the same deal...

i know one thing, after the new fmic install, the car on open dp is amazingly fun to drive, and pulls 10 times harder, and ive noticed fuel consumption go up tremendously...

 

i reread your original post and i do agree than your IC is really small. I had that intercooler at one point, but never used it. It is too small for 300whp

 

i imagine themost restrictive part of your setup is infact the downpipe, its probably restricting the flow of the turbo restricting spool time and power, that is what i wouldbe most concerned about, esp making those kinda numbers, it would definitly be the best step before any other, you will see much greater gains with the downpipe over any other upgrade, esp with the setup just the way it is right now, you will def see more gains

 

The manifold and dp aren't the best in the world, but i dont think they're going to hold you back that much. A 3"dp woudl help obviously but isn't required at all. I made 275/194 on my last setup w/ a log, 2.5" dp and exhaust, T3/T04E 60 trim and a stock GSR.

I think what's happening is a combination of things....your IC is too small, the D series head is fairly restrictive, the 2.5" dp and exhaust doesnt help anything, the wastegate is from China and couple that with the bad design of the Drag manifold....that's a recipe for problems IMO

 

What turbo is being used here?

 

T3/T04E 57 trim .63 ar....just like the one you used on your old D setup