I just recently put a fmic on my turbo sohc.
its got...
>a greddy turbo kit w/ fmu.
>the internals are stock.
>I'm pushing 5 psi.

before the fmic was installed i ran a 10 sec. et at the track (8th of a mile).
i installed the fmic today and ran it, but it ran 12.68, my best was an 11.46.
the car seems slower then before, is it because of the 5 psi i'm running? should i turn up the boost or get bigger injectors?...
anybody have some suggestions or have the same setup as mine, this is my first turbo project, i plan on doing a swap after i blow up this motor.

here are some pics...

 

recheck all of your connections. You should definately not be slower after the intercooler install.

I had an unintercooled greddy kit, and after I put an intercooler on it was night and day. The turbo spooled fast, it was much louder, and my car pulled much harder.

 

maybe you are leaking boost

 

what your seeing is a pressure drop in the piping system. When you added the intercooler you added more volume that the turbo had to pressurize before it could really start to build enough power to spool itself up. You're going to have to raise the boost pressure to compensate, but only so much. What might have happened is if the intercooler is not designed for the kit and boost level your running, its to large. People do this a lot accidentally. Do check your connections, but you can usually hear the air leaking out if there's a problem, and often the turbo won't even spool up fully if there is a leak. Good Luck.

 

random observation here but um... you have no piping running to the intercooler. Perhaps you just didn't take pics of that?

 

sure you would...... we're forgetting about the pressure drop guys..... lets say 2 to 3 psi across the intercooler..... so the means you have roughly 3psi of boost to your intake.... OR you have a loose charge pipe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SFC &raquo;</TD></TR><TR><TD CLASS="quote">random observation here but um... you have no piping running to the intercooler. Perhaps you just didn't take pics of that?</TD></TR></TABLE>

wheres the piping at?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SFC &raquo;</TD></TR><TR><TD CLASS="quote">random observation here but um... you have no piping running to the intercooler. Perhaps you just didn't take pics of that?</TD></TR></TABLE>

BAHAHAHAHA
&lt;- wondering the same thing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Distorted &raquo;</TD></TR><TR><TD CLASS="quote">what your seeing is a pressure drop in the piping system. When you added the intercooler you added more volume that the turbo had to pressurize before it could really start to build enough power to spool itself up. You're going to have to raise the boost pressure to compensate, but only so much. What might have happened is if the intercooler is not designed for the kit and boost level your running, its to large. People do this a lot accidentally. Do check your connections, but you can usually hear the air leaking out if there's a problem, and often the turbo won't even spool up fully if there is a leak. Good Luck. </TD></TR></TABLE>

 

do you have a boost guage connected. you should notice that you are not running 5 psi anymore because as said before a pressure drop will occur across the intercooler. get a guage and adjust back up to 5 psi and you will fall in love with the intercooler.

 

it would prolly be the ultimate coolest thing ever if the dude didnt having piping ran through the i/c..

assuming you did hook it up correct ide check for leaks 1st...then to fix the pressure drop issue just tap the wastegate pressure line AFTER the intercooler....im pretty sure greddy kits have the source at the compressor, so just cap that off and run a line to somewhere on your intake (such as tap into the FPR line)...or you can drill a hole into the intercooler piping after the fmic, but closest to the turbo and put a fitting in (jb weld around it to seal it off good)...ide rather make the line as short as possible to the wastegate and tap a fitting into the i/c piping.

wow thats a long explanation for a simple thing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gritsak &raquo;</TD></TR><TR><TD CLASS="quote">
assuming you did hook it up correct ide check for leaks 1st...then to fix the pressure drop issue just tap the wastegate pressure line AFTER the intercooler....im pretty sure greddy kits have the source at the compressor, so just cap that off and run a line to somewhere on your intake (such as tap into the FPR line) </TD></TR></TABLE>

Definitely look into doing this.
On a side note.. I always thought that when you installed an intercooler although you were seeing less boost on the gauge (say 6psi) that is was more effiecent boost then the (7psi) you were seeing prior to being intercooled. So, although you were seeing less boost you would still be making more power.

Correct me if i am wrong.

 

lolz. This thread is some Noob funny ****. Hope its not that? -=P lolz..

 

yeah same thing happen to me when i intercooled my ls b18b. i was boosting 6 psi non intercooled. but when i intercooled it it went down to 3 psi i just turned it up to 10 psi and i ran very strong ur gonna lose pressure when u install an intercooler. hope that helpped somewhat lol.

 

i'll check the connections and raise boost, then see what happens.
thanks

 

yeah, this is just the pic without the piping, i had my friend at a muffler shop make the piping.

 

I've got an autometer phantom boost gauge, but i think its unaccurate. b/c when i had the greddy turbo kit installed, the boost read 10 psi at 7k rpm, but greddy said the kit came pre set at 5 psi. After the FMIC was installed the boost reads 5psi at 7k rpm. I think this might be the problem, I'll try turning up boost to see what happens, and supply some pics of my next run at the track...
thanks

 

hook the vacum line for the wastegate to a intake manifold pressure source like the brake booster this will make up for the pressure drop, and hook your boost gauge there also

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1CYA &raquo;</TD></TR><TR><TD CLASS="quote">hook the vacum line for the wastegate to a intake manifold pressure source like the brake booster this will make up for the pressure drop, and hook your boost gauge there also </TD></TR></TABLE>