Excelerate

I have a '99 Accord i4 VTEC t3/t04 turbo, Spearco FMIC, etc etc. (F-Max kit). Anyways I have Greddy EVO catback and i decided to install the Random Technology Cat. I love the cat and i havent dynoed the car after installin it but once i installed the cat i started overboostin. I was originally hittin 9psi and then after the cat i started hittin 11psi. At first i thought that this cat was doin wonders for my car b/c the car was haulin ***, but then i noticed it was overboostin. So i guess that the cat freed up some air flow and caused the exhaust somehow to spin the turbo more, thus causin me to boost 11psi and start detonatin a little. Anyways, just wanted to warn anyone doin that install so they know to watch their boost level.

Boostfed

Yes this was the exact same thing that happened to me 3 years ao when I installed my test pipe on my car 9psi before then 11psi after, nice feel.

InTeGrA B18b1

my open dp doesnt even spike with the deltagate.

W.Zero

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by InTeGrA B18b1 &raquo;</TD></TR><TR><TD CLASS="quote">my open dp doesnt even spike with the deltagate.</TD></TR></TABLE>i would do what he did. go open dp. or get a test pipe. even if you have a high flow cat you still have a cat. get rid of it and it will feel better. cats on a turbo car is like having bananas in you exhaust.


Modified by W.ZeroB18C1T at 7:11 AM 9/18/2003

xci_ed6

The reason for the overboost is because of the pressure diference from the mani side to the exhaust side of the WG. By freeing up the exhaust it will increase the pressure difference=increased boost.

-Dustin

Mr. Softee

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by krustindumm &raquo;</TD></TR><TR><TD CLASS="quote">The reason for the overboost is because of the pressure diference from the mani side to the exhaust side of the WG. By freeing up the exhaust it will increase the pressure difference=increased boost.

-Dustin</TD></TR></TABLE>

something like that

M.A.R.C.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94goldjungsr &raquo;</TD></TR><TR><TD CLASS="quote">
what he said... yah same thing happened to me. i was running straight off the w/g with a 6.5psi spring... never saw over like 5-5.5psi. threw in the testpipe and it would hold all 6.5psi fine. and yes cats suck ***...