hey guys! i have a obd1 gsr swap in my eg with a p72 ecu. the other day i notice it redline at 7400-7500rpms when normally it redlines at 8200rpms, vtec still hits hard and i dont know whats going on! does anyone know?


any help would be great

 

throwing any codes? any other symptoms?

 

nope nothing at all, and it still runs really damn good

 

anyone?

 

I have a feeling your stock tach is off... may have something to do with the signal comming from the distributor. Just my .02 because I really doubt the redline actually changed.

 

You mean your rev limiter?

 

how can my tach be off? it idles fine and vtec cracks normal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sageuvagony &raquo;</TD></TR><TR><TD CLASS="quote">You mean your rev limiter?</TD></TR></TABLE>

yea

 

bad ecu? try a different one..

 

your oe tach is off, mine is too, mine say when i hit rev limiter, im at 9 grand but my monstyer tach, which is a little more reliable, tells me im at 8200, so check your tach, or buy a monster tach.

 

Just listen to the engine. Does it sound like it's going to 8,200 or no? There's a big difference in sound between 8,200 and 7,400 rpms. 8,200 is an rpm I can never forget. It's music to my ears.

 

When you change gears, 1st to 2nd, what does your RPM drop to?

This may or may not tell you anything if you tach is off...but from redline, it should drop to about 5500 with the crappy *** GSR trans.

How can you even hear VTEC? I couldn't hear **** with my GSR. Are you listening to the 4500RPM VTEC switch or the 5700RPM butterfly switch? The butterfly switch is a lot louder.

 

ya unless your ahead of the game and have a b16 manifold haha

 

was gonna say the ecu went into limp mode buuut then it would more likely be at 4k not 7ish.


arg i wunna know whats up too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B serious &raquo;</TD></TR><TR><TD CLASS="quote">When you change gears, 1st to 2nd, what does your RPM drop to?

This may or may not tell you anything if you tach is off...but from redline, it should drop to about 5500 with the crappy *** GSR trans.

How can you even hear VTEC? I couldn't hear **** with my GSR. Are you listening to the 4500RPM VTEC switch or the 5700RPM butterfly switch? The butterfly switch is a lot louder.

</TD></TR></TABLE>

my gsr cracks really loud at 5800rpms, when i slam into 2nd gear im at 6000 - 6500 rpms becuase of my itr trans

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DougieFreshZero &raquo;</TD></TR><TR><TD CLASS="quote">ya unless your ahead of the game and have a b16 manifold haha</TD></TR></TABLE>

no. because VTEC would still be at 4500 and pretty inaudible. Plus...why would you get a B16 manifold for a GSR head? The bolt patterns dont match up and the B16 manifold looks like my pinky finger...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slammedz6ef &raquo;</TD></TR><TR><TD CLASS="quote">

my gsr cracks really loud at 5800rpms, when i slam into 2nd gear im at 6000 - 6500 rpms becuase of my itr trans
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You're hearing the butterflies open. That's not VTEC. VTEC comes in at around 4500 on a GSR with a P72.