98ej8coupe

i have a 98 civic ex coupe with aem short ram. I usually dont rev it very high but i was on the highway in 4th gear and i noticed the crossover was very noticable and it was around 5400 rpm so i tried it in 3rd and every gear it is around 5400. i know it doesnt sound right and i thought sohc was supposed to crossover around 4200 so idk whats with it. there is not indication of crossover around 4k.... any reason why?

Eran

iTrader: (1)

No, it's supposed to be 5400.

BoostinEJ1

i searched on here as im sure some of you will tell the kid to do but i havent yet found a specific answer. i had a 93 si sohc and it crossed over real low. my friend use to have a 98 ex and he claims his was low as well. in this case i have no clue but i've been in the person posting this car and you clearly hear it crossover, maybethe short ram idk.

JDMFantasy2k

depends on how the motor was tuned from the factory. D16y8 motors crossover at 5400 rpm and redline at 7K. I always thought that d16z6 motors crossed over lower and i believe they redline at 7250, althoguh i'm not sure.

jadugartir

I remember my old d16z6 used to open up around 4800-5000, thats when i would hear it anyways.

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMFantasy2k &raquo;</TD></TR><TR><TD CLASS="quote">depends on how the motor was tuned from the factory. D16y8 motors crossover at 5400 rpm and redline at 7K. I always thought that d16z6 motors crossed over lower and i believe they redline at 7250, althoguh i'm not sure. </TD></TR></TABLE>

They do, D16Z6 stock with a stock P28 ECU has a VTEC crossover at 4.8K and redlines at 7.2k.

EJ8beast

OBD1 is 4600 P28, OBD2 is 5400

Plum_civicEK

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ8beast &raquo;</TD></TR><TR><TD CLASS="quote">OBD1 is 4600 P28, OBD2 is 5400 </TD></TR></TABLE>

for SURE it's not 4600 for the stock p28 ecu, i've it on my EK w/ obd1 conversion, also have the VAFC2 so the green light will turn into red light when vtec crossover.
it's about 5400 rpm and fuel cut at about 7400 rpm

FlatBrokeHatch

You'll never find a definate answer on here(I've searched a trillion threads before)...answers range from 4400-5500 and everyone believes that their answer is correct and everyone else is wrong.

Right or wrong...all I can say is my p28 is as stock as the day it came out of the factory...vtec hits at 5200 and redline at 7500.

Syndacate

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

for SURE it's not 4600 for the stock p28 ecu, i've it on my EK w/ obd1 conversion, also have the VAFC2 so the green light will turn into red light when vtec crossover.
it's about 5400 rpm and fuel cut at about 7400 rpm</TD></TR></TABLE>

Iono, I thought the D16Z6 crossover was at 4.8k.

Nobody knows for sure...somebody that's worked in a Honda dealership or something, there has to be an official spec sheet on this **** someplace...because no 2 pple have the same answer...

EJ8beast

my 98 EJ8 had a OBD2-OBD1 harness with a P28 from a Del Sol Si, and it would go into VTEC at 4600 EVERY TIME and redline at 7500.

With the OBD2 computer it was 5400 and redline at 7200.

H9Omega

The vtec crossover point on a d16z6 is 5200 and redline at 7200k. The reason being it may look as if it reaches 7400 is that the cluster is off at that high rpm.

FlatBrokeHatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H9Omega &raquo;</TD></TR><TR><TD CLASS="quote">The vtec crossover point on a d16z6 is 5200 and redline at 7200k. The reason being it may look as if it reaches 7400 is that the cluster is off at that high rpm.</TD></TR></TABLE>

That's what I thought too...but my tach will slam 7700-7800ish. I figured it'll be off so thats why I said my redline is 7500. But redline being at 7200? I have high doubts my tach will be 500-600rpm off. eh who knows?

Jonknee

how about the p08 vtec engagement ?

JDMFantasy2k

how about this.... Does it really matter? It's only a single cam

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMFantasy2k &raquo;</TD></TR><TR><TD CLASS="quote">how about this.... Does it really matter? It's only a single cam </TD></TR></TABLE>

Stop being a ****** and pick a side .

I still say 4.8k

5.6k is bullshit.

And for those who say "redline is at 7.5k"
I think you mean "rev limiter is at 7.5k"

Because factually, look at any 92-95 EX cluster, the REDLINE is at 7.2k...where the governor is at is a different story, I say it's around 7.3k or so since I can usually put it into the red zone a bit but the tach's off anywayz because honda stock tachs suck.

We need somebody in here that chips P28's, like the dude from pherable, or Kenji, they'll know for sure.

Jonknee

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMFantasy2k &raquo;</TD></TR><TR><TD CLASS="quote">how about this.... Does it really matter? It's only a single cam </TD></TR></TABLE> im curious

FlatBrokeHatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">
And for those who say "redline is at 7.5k"
I think you mean "rev limiter is at 7.5k"

the tach's off anywayz because honda stock tachs suck.
</TD></TR></TABLE>

Everyone knows what is meant when someone says "redline"...no need to start another debate...and who's to say that Honda tachs "suck". There's still no proof of them being off...it's just a notion that everyone has and it's just lingering around the forums. Who knows...maybe they are off...but maybe they are perfectly accurate...that situation is about as known and the vtec engagement and revlimit on p28s