but it doent seem to pull hard i have 2.5 in piping all the way through uberdata with a tuned map and it doesnt feel like it pulls hard it is at 10 psi with a t3t4 57t .63 ar fmax mani and a 2.5 in exhaust
at first i was too lean then i got uberdata and it is at .90 ish according to a volt meter i know its not accurate but its all i have for now

any things i should check out or things i should change?
thanks

 

just a guess but i think it might be your 2.5 inch exhaust, isnt that a little restrictive for 10psi

 

possible but i would think it would pull harder still?
i might hook up a adjustable fuel pressure regulator and see i that does anything after i bump it up a little

 

dyno is your friend. that's the only way you'll ever get an accurate reading of what is happening.

and i don't believe it's your exhaust because i've got a 2.25" exhaust and the sucker still pulls.

 

2.5 inch exhaust is rumored to be good up to 250 HP...

-PHiZ

 

k thanks i am going to do a compression test then i am going to go to the dyno
and even though my dp is 2.5 in and i got a 3 exhaust after that would it still flow 3
becuase someone told me that it will only flow as much as the smaller pipe

 

by the way about what should the numbers be on a b18a1 i know they should be about 15 percent of each other but how high for the number? like 170?

and phiz what are you holding in your hand?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shermanyang &raquo;</TD></TR><TR><TD CLASS="quote">dyno is your friend. that's the only way you'll ever get an accurate reading of what is happening.
and i don't believe it's your exhaust because i've got a 2.25" exhaust and the sucker still pulls.</TD></TR></TABLE>

I agree. I have a 60mm exhaust (2.36 inch) and it's fine. If you're not making over 300 whp a 2.5 inch is fine.


Modified by Rah Rah at 11:40 AM 11/20/2003


Modified by Rah Rah at 11:41 AM 11/20/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shermanyang &raquo;</TD></TR><TR><TD CLASS="quote">dyno is your friend. that's the only way you'll ever get an accurate reading of what is happening.

and i don't believe it's your exhaust because i've got a 2.25" exhaust and the sucker still pulls.</TD></TR></TABLE>

Exactly...

 

Avatar is a charge pipe and blitz blow off valve.

If the DP is 2.5 inches, and you go to a 3 inch exhaust, What you say about the smallested diamater being a choke point does sound reasonable or true.

Howeve I've heard ppl argue that the hot gas is going to want to expand when reaching the 3in portion, also a little choked off diamater helps you spool quicker.

Decreasing diamater sacrifices volumetric flow for velocity...

-PHiZ

 

Its not your exhuast, it seems your car needs hit the dyno to find the porblem. Remember fuel is everythnig is a turbo setup.

 

hey i just did a comp test and it was about 150 all the way across
i think i am going to hit the dyno sometime soon hopefully
thanks

 

i think there is an underlying problem. Even rich *** fmu setups pull hard, i figure with that boost on that motor with a decent turbo like that he should feel it pulling a lot quicker do a compression/leakdown

 

uberdata maps are not tuned maps. You need dyno time.

 

i have goldjungs tuned map
and i am gonna do a leakdown this weekend hopefully

 

ya, but every engine is different go to the dyno, put down 250whp, be happy