OK my car is only reving to 7700 rpm........why would it be doing that???
i have a 91 crx dx w/ b16a 0bd0 and im using a pw0, msd digital 6 box w/ rev limit is set at 8200. i also tried reving it after disconecting the msd and its the same.

when its not at normal temp. it revs up only to 7200 then later only to 7700 rpm
i barley did the swap also and all wires are correct and i also tried a diff. distributor. and comp.
What do you think????

 

IMO everyone knows this problem w/o saying

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm91CrxSi &raquo;</TD></TR><TR><TD CLASS="quote">IMO everyone knows this problem w/o saying</TD></TR></TABLE>

its either we do or dont, theres no room for an opinion.

 

my guess would be to get a 5sp pr3 ecu, or get your ecu chipped

 

mines the same way..the reason is simple...you have an obd0 pr3....oh and its form an automatic tranny too...did i mention you also have a speed cut which wont let you go past 120, and your cams are the mildest vtec cams...the solution is simple...chip your ecu.. and get either sirII or gsr cams...good luck

 

no i have a pw0
and why do you say that these are mild cams?
so what could it be can it br the computer or is this engine not sutible for higher reving?

 

it idles at 7700 or it just hits its rev limit at 7700? if it idles. then you have the tps wiring back words. if its stops at 7700 (y woul dyou go this far?) then you need to chip your ecu.

-Shane

 

are you going by what the stock tach is telling you, they get kind of inaccurate up top. you might be hitting 8200 but its only reading 7700. happens to a lot of people.

there are some guys on here that have the stock and aftermarket tach and report their stock one being of by as much as 500 rpms up top.

hook up an aftermarket one and test it out.

 

Why wouldnt i wann reach 8200???
i hooked up my vafc and it goes between 76-7700 rpm
so are you saying that my car only goes up to 7700rpm?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_36 &raquo;</TD></TR><TR><TD CLASS="quote">Why wouldnt i wann reach 8200???
i hooked up my vafc and it goes between 76-7700 rpm
so are you saying that my car only goes up to 7700rpm?</TD></TR></TABLE>

do you have aftermaket cams? if so then i can see y you want to hit these numbers. but if you have stock cams then i would want to go that high, cause you end up loosing power after a certin point with stock cams. honda put a rev limiter there for a reason.

 

keep in mind the stock tach can be very inaccurate i know mine is i have a chipped ecu with a 7500 rev limit and my tack will barley hit 7k before ignition cuts off but i know im hitting 7500 so i just kinda go by ear

i would also get rid of that worthless msd and stop using the vafc and just get the ecu chipped its 100x better and the car will run better guaranteed and its cheaper than the msd and vafc

also a better set of cams really help those obd0 b16a's

 

well if it is cheaper i wouldnt know since i already have it.
but are you saying that all b16's dont rev up to 8200??
i thought that they all do.
i do have a set of type R cams and set of skunk 2 cam gears......will that help me wrap up higher?

 

Check the cam timing.

Any check lights?

 

Are you trying to say b16a auto cams don't make power to 8200rpm like the manual models do.

 

yes and no...what im sayin is that obd0 cams are the mildest of the b16 cams...the one wit the most profile is i believe sirII..hence why jdm obd1 & 2 make 10 more hp than the og Sir's 170...i just switched mine out to gsr cams..the only diff i got was 8 hp on the dyno..but considering i got for free and put em in myself...it was a good deal..and by the way pr3 will only rev to about 7700..its not the tach thats at fault its the ecu...

 

oh and the msd rev limit is for a 2 step i believe...if you have the digital 6 box..god i wish i had a 2 step...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Import_lifestyle &raquo;</TD></TR><TR><TD CLASS="quote">oh and the msd rev limit is for a 2 step i believe...if you have the digital 6 box..god i wish i had a 2 step...</TD></TR></TABLE>

you can get a 2 step for cheap http://www.phearable.net... when he chippes the ecu he can add a 2 step launch control and he can also add a check engine light shift light for your inaccurate stock tach

since you live in kissimee you can even drive out to his shop and pick it up... its a long drive from kissimee but if you have a day off and nothing better to do itll save on shipping

 

I wouldn't be concerned with power loss but more so of floating valves. Up the valve springs to type R or equivalent too.

but you won't gain power up that high without the correct cams.

-Shane

 

So wait, a pr3 only goes to 7700 rpm, but a pw0 goes to 8200?.

 

i have a PW0 and it only revs up to 7650 max.
i have my vtec controller hooked up and it reads to 7650 but on my tach it goes upto 7800

 

if the car is manual the auto computer will not let it rev out all the way make sure there is a manual computer in it i had the same problem

 

Well..are all PW0 ecu like that?, which one goes to 8200rpm then.