well i have a dpfi and currently i have a short ram intake. its working just fine and everything and i haven't had any problems with it but i saw someone with a filter just stuck right on the air inlet portion on the intake. So what is the benefit of having a short ram setup vs. the filter on the intake? (Don't say the difference in noise)

 

the difference is simple: with a short ram you only suck up some heat into the intake and lose a little bit of horsepower but with the filter right on the TB you suck up more heat and lose MORE hp.

stock airbox

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ham &raquo;</TD></TR><TR><TD CLASS="quote">the difference is simple: with a short ram you only suck up some heat into the intake and lose a little bit of horsepower but with the filter right on the TB you suck up more heat and lose MORE hp.

stock airbox </TD></TR></TABLE>

is this true? if it is, im puting my short ram back on. can anyone confirm this?

 

Yeah put the intake tube back on

 

Hot air = less dense. Less dense air cannot compress as good, and has less oxygen in it. Less oxigen + weak air on compression = minimal combustion. This results in a lost of power, at most, 2hp on that engine. Put the piping back on. Aftermarket piping is smooth on the inside (or should be) to allow air to travel turbulence free, making it flow easier and better, also gives of a nice noise (I love intake noise). The stock air tube is rippled, giving it turbulence and quieting the intake, making it a more daily friendly car...but who wants that.

 

I don't know with DPFI. I've had a short ram that went behind the battery and it felt so weak at WOT on the lower rpms and I could barely even hear it.. it was like I didn't even have an intake. When I stuck the filter right onto the DPFI housing, not only was it louder (remember folks, we're talking about DPFI here, we don't need tubes, the DPFI housing alone removes turbulance to direct the air into the carb style TB) but it had better throttle response and just felt stronger in the lower band (which is good for my everyday driving). The weak DPFI struggles with getting air already, why make it harder with longer tubes? With the short ram though, it felt quicker when I reached around 6krpms, but I'm not too worried about top end on a d15b2.

You tried it right 4g4d? Did you notice the same difference I did?

BTW, did you remove the V-plate aswell in the DPFI housing? Take that out but leave the mesh as it helps direct the air into the TB.




Modified by rayzian at 9:45 AM 6/14/2006

 

do yourself a favor and get a mpfi TB and run that

 

more like do yourself a favor and do mpfi swap!

 

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

You tried it right 4g4d? Did you notice the same difference I did?

BTW, did you remove the V-plate aswell in the DPFI housing? Take that out but leave the mesh as it helps direct the air into the TB.


Modified by rayzian at 9:45 AM 6/14/2006</TD></TR></TABLE>

ummm yeah i did try it and its a lot louder and better pick up. i removed the v-plate and the first butterfly valve. i left the mesh on just in case something flies in.