ways to byapass rev limiter

[bcrazy]

is there a simple and easy way to get rid of the 6000 rpm rev limiter on the LH2.4? Altough my B230FB really don't make any power above 5800 rpm it might do so in the future, then a 6000 rpm rev limiter would kinda suck... :-)

[linuxman51]

perhaps a chip for you guys, other than that, you're probably better off with something aftermarket

[z537z]

OK...I put a tach in my car (large one, ->7K) and it idles just fine around 1000.

I snap it up in first and it'll go right up to 7K.
2nd, same thing (about 62mph).
3rd is way up there. 90 something I think.

It never struck me as wierd until another Volvowner riding shotgun was like "where's your rev limiter??!!"

I said 7. He looked at me funny. 1990 240DL, LH2.4. Is this weird? Is the tach off? Fuel shutoff is there, the whole neighborhood knows when I hit it (I don't do it anymore...I'd like my car to live for a while). What's up?

_z

[Boosted2003]

OK...I put a tach in my car (large one, ->7K) and it idles just fine around 1000.

I snap it up in first and it'll go right up to 7K.
2nd, same thing (about 62mph).
3rd is way up there. 90 something I think.

It never struck me as wierd until another Volvowner riding shotgun was like "where's your rev limiter??!!"

I said 7. He looked at me funny. 1990 240DL, LH2.4. Is this weird? Is the tach off? Fuel shutoff is there, the whole neighborhood knows when I hit it (I don't do it anymore...I'd like my car to live for a while). What's up?

_z


did u put the right chip in the tach or ddi u not set it :wink:

[own6volvos]

I think your tach is kinda off.

[2 780s]

I hear often of this mystery limiter in LH2.4 but never reach it, been to 6,500rpms many times no limiter! My tach is off maybe 20+-rpms up there @ 6,500, confirmed w/high end portable scanner.

As most of you know I converted to an AW72L and it shifts from 3rd to 4th @ 6,300 rpms always. 1st to 2nd/2nd to 3rd shift @ 5,800 rpms so I would hit that mystery limiter always when I get on it, but do not!

On another note, I hear these motors do not make power at those rpms, yet it is still pulling strong at all shift points, wonder why?

Motor is a generation 3 B230FTI+ in a 90 780.

[ZVOLV]

On my 90 740 I hit a rev limiter, but not always. I run out of first gear pretty fast (m46) and i have taken it to 6500 before.

I think mine is somewhere around 6k. It seems to only hit the limiter sometimes. Maybe it is if the RPMs stay too high for a period of time.

Sorry for the vagueness.

240s dont have a rev limiter right?

I do know that the rev limiter is in the ignition control module (EZK 116 etc) , not the fuel injection ECU (lh2.2, Lh2.4)

Correct me if I am wrong.

[slugger89]

goto www.powerchip.com i believe their chip eliminates the rev limiter but i wouldnt do it. its up to you :)

[80GT]

Isn't CIS grand!? I can freely take it up to 7500 whenever i wish. Sometimes more :badboy: . I'll kill it one day, i know. (thats the point though:roll: )

240s dont have a rev limiter right?



I have LH2.1, and I have a hard limiter at ~5800-6000 RPM.

[z537z]

[quote:5499993bcc]did u put the right chip in the tach or ddi u not set it [/quote:5499993bcc]

What chip? It just plugged in to the red/white wire...

I say rev limiter, I mean fuel shutoff. The GLKSNGDSSLKG sound once you hit the right rpm limit.

It feels like the tach is right, I mean it does idle at 1K. And acc. pedal moves it what feels to be the right amount.

Looks like this:

http://grove.ufl.edu/~smack118/images/Volvo/240dash1.jpg


[quote:5499993bcc]240s dont have a rev limiter right?

I do know that the rev limiter is in the ignition control module (EZK 116 etc) , not the fuel injection ECU (lh2.2, Lh2.4)

Correct me if I am wrong.[/quote:5499993bcc]


True?


_z

[dl242gt]

K-jet 240 series dont' have limiters. That means B21F and B21FT powered cars for the US. The LH cars are supposed to have a limiter at 6k or whatever. All the late model N/A cars I've driven really didnt' like rpm above 4.5-5k imo. I'm going to put a VX in my N/A 89 project car.

Happy rolling,

[bcrazy]

THe B230FB has the VX3 cam. It makes power to around 5500 rpm's stock. It has an alomst dead flat torque curve from 3000-5000 rpm's All other volvo's i've driven just dies after 4000. My 240 with b19A didn't like anything above 3500 but i still took it to 6900 on a few occasions... Mine pulls quite strong to 6K in 1st 2nd and 3rd pulls very good to a bit more than 5500. With my new exhaust it makes good power to about 5800 rpm's i'm thinking that when i get my 4-2-1 header and get the head portet it may make good power to a bit more than 6000 rpm's. If the limiter is in the igntition module, can i get an aftermarket ignition system, that will work with the stock ECU? How much rpm's can the stock engine handle without compromising reliability? I'm thinking its more that 6k

[bcrazy]

slugger89:
that link didn't work

[ZVOLV]

I believe DLOT about the kjet b21 having no rev limiter. I drove my friends 83 244 turbo and it had no rev limiter.

About the rev limiter. I just said what I THINK might be true. I feel kinda bad for putting out questionable info, but this is a discussion board right?

Thinking about chip tuning reminds me of seeing Rev Limiter elimination as a feature of some Fuel ECU chips. So I guess the rev limiter could very well be controlled by the fuel ECU not the ignition ECU.

Doesnt over-rev cause ignition cut out, and overboost causes fuel cut out? 1990 and newer has no overboost switch.

[Captain Bondo]

you tach may be high as 1k is a high idle. Above spec anyways. You should be around 750.

[rwturbo]

Yes both my 84 and 87 turbos have rev limiter around 6k on both and its not the overboost its gone

[Anonymous]

Perhaps, the following site about the LH controllers may shed some light on the issue. Lots of data.

http://www.scotsglen.com/saab/ecu/

[tequila_gundam_no_chaser]

I hit rev limiter very, very hard at 5500-6000 rpms. Shifting seems a bit slushy (slush box mebbe?) and I bang rev limiter. Lh 2.2, 3rd gen b230ft

[240Psycho]

Hey Z your car revs a little high?
My car idles at 500 RPM? and i just installed a tach as well.
too bad i have an auto :-(
Anyone know how to make the car shift at higher RMPs then 4k :rant:
there must be a way to mess with the computer or something

[z537z]

Yeah so people have been telling me...

Boosted 2K3 mentioned something about a chip?

Just wrong tach, or what? Any way to fix this, this ever happened to anyone?

_z

[240Psycho]

may be the tach itself is screwed up or something?

[1 riktig svensk]

What about fooling the rev limiter signal? Is that a possibility? If you put some kind of resistor on the signal wire? So the ignition computer thinks the car is revving at a lower rpm?? Or would that just screw things up? Ideas??

[isaac]

Tip of the day: If he can do 62mph in 2nd gear, arguments about a misreading tach are moot.

[z537z]

I was wondering about that...

Whatever, I'll leave it be. Maybe my car is just "special."

_z

[Matthieu]

what do you guys think is the highest rpm you can run a b230f without damaging the motor can the valves float. I never took my engine higher that 5000 (**** It has no power in the low much less the high revs) nothing makes my wagon fast it just drinks gas
Matt
miami

[isaac]

I've heard that 12,000 is about the practical ceiling with stock valve springs. At that point the car is making about 10 ft/lbs of torque and about 500hp. Wait that's an F1 engine.

I've seen recommendations of max prudent revs being generally around 6,500 without double springs. The higher the cam's lift, the more dangerous this becomes, both in ease of float and in possible damage were float to occur. Float a valve with the K and you're gonna be opening things up.

[slugger89]

i wouldnt pass 5 ive done it about 3 times dont sound right. or maybe thats me because i **** my pants thinking its gonna break and ill be walking for a month or 2

[Volvo4Life]

[quote:a167c7aa9f]did u put the right chip in the tach or ddi u not set it

What chip? It just plugged in to the red/white wire...

I say rev limiter, I mean fuel shutoff. The GLKSNGDSSLKG sound once you hit the right rpm limit.

It feels like the tach is right, I mean it does idle at 1K. And acc. pedal moves it what feels to be the right amount.

Looks like this:

http://grove.ufl.edu/~smack118/images/Volvo/240dash1.jpg


[quote:a167c7aa9f]240s dont have a rev limiter right?

I do know that the rev limiter is in the ignition control module (EZK 116 etc) , not the fuel injection ECU (lh2.2, Lh2.4)

Correct me if I am wrong.[/quote:a167c7aa9f]


True?


_z[/quote:a167c7aa9f]


you have my stereo along with my remote :badboy: