I run a greddy profec spec b and to really get the best from my MSD chip i really need the midrange boost spike

Question is can i do it on this on this controller??

Don't get me wrong its great as it is (boosting to 24 psi all the way!!)
but with the extra mid i feel it would be better

Opinions and suggestions please

Paul

 

take it to ur tuner and let him do it properly.............ur going to need the fueling checked to make sure ur spike doesn't melt it.............

 

BTTT

 

whats your chip specced for?

 

803's 28 psi peak mid 23 ish held to limiter T34/48 stg 2

Paul

 

Im not happy with mine paul as it only runs 2 bar, had an idea tho im gonna trick the controllers map sensor with a bleed valve gotta be worth a go
Hi by the way

 

Yup, thats a problem with most these boost controllers, they dont allow spikes, great at accurate boost control, but just at holding it at a set level.

You mention boost spikes in the Jap scene and they think its a REALLY bad thing, I almost got banned from SXOC before for arguing about it.
Reason they think its bad is they have never experienced anything but spiking being refered to as a bad thing, as their boost controllers dont allow it in a constructive way.

My HKS controller is allowing a massive spike at mo as its fucked, no control at all, seems to have jammed shut

 

Pretty sure you can play around with the settings to allow a boost spike on the greddy boost controllers....bit complicated to do if you don't know what you're doing though!

 

You can have a spike with most, but it isn't rpm related - it's when you first come on boost. It hits a setpoint and then falls back to what u set the duty cycle too.

Eboost2 and AVCR allow full RPM based control which is v good. EG - fwd u can make the boost come in more gradually near peak torque for traction, then give u a mid range spike, and also allow the boost to come in quickly when ur past peak torque.

 

its a peak and hold controller so if its upped to 28psi you might to much at the top end so just watch your fueling

 

Spence its the same as Nicks old one,just wanted the midrange kick back really

Paul

 

I've a wideband so thats no problem

Paul

 

cool im just concerned the greens will max out chap

 

havent you got enough to do already Paul? you sure you want to be messing around with the boost or are you just bored. When i went in yours it was fine, nice and smooth, have a go in mine; its not as smooth but it does peak well

 

LOL m8

btw get it out i've some dosh for ya

Paul

 

tomorrow i'll drop it round, quick enough for ya!! your more impatient than my mrs! lol

 

Get on with that decorating

LOL

 

you can do the ceiling......i'll get you a ladder!

give u a buzz tomorrow

 

Bitch

 

lol, sorry! - speak tomorrow, ruined your thread now

 

Anyone else have any suggestions or its going back to the amal valve

Paul

 

Costina,
From my experience of the spec B controller, it is very good at doing what its designed to do. Doh !

I.E. closed loop flat line boost !

I think you will find it will not let you do what you want just by adjusting the controls as it will just re-learn your boost levels.

You could try adding a bleed valve in line with the actuator with a restriction in line just after the controller output.
Just be carefull !!!

 

simon my one you sold me is shit changing it to autronic one to run with the sm 4

how are you buy the way ??????????

 

Cheers Si I've had a play and it won't do it so i need another option any ideas??

Paul

 

Your actuator is probably faulty
Having said that, Sheddy likes a boost spike so you would have had to bin it anyway.

I am fine thanks, How the family is well mate

 

Probably amal valve and optional 12 position boost control... Prepare to get your wallet raped !!!!

I would go for a new mappable boost controller. The profec B will fetch good money in the jap market

 

I going to keep controller for the tina as that don't require a spike

so i'm of to have a fiddle with the amal valve

Thanks

Paul

 

[quote=Flux Capacitor;3559347]Your actuator is probably faulty
Having said that, Sheddy likes a boost spike so you would have had to bin it anyway.

Simon not correct no spike for me as I want as much boost everywhere so this is not a spike

Mark

 

Mark,
Sorry, I was generalising as I know you to max it !

 

I have a Blitz SBC-id that I used on my 300zx before i bought my 3dr. It has a scramble boost feature that allows you to run high boost spike for a programmed number of seconds. I dont use that though as I only have a stock T3 so just running a flat 22psi on greens.
It also links to a speed/power meter so you can speed map it and have boost changing at different speeds, that was good as you can have the boost coming in lower through the first couple of gears to keep wheelspin down. But i cant use that feature either cos the cossie dosent have an electronic speed sensor LOL.

 

A boost spike, is not good boost control, and the Greddy will not do it....certainly in a controlled and reliable fashion.


If you want to program a boost curve with different rpm's, you will need a different controller.

 

Altering the 'Gain' can result in a boost spike.

But in my opinion, boost spikes are

 

I know Steve but there around £400

Paul

 

Then pick a steady boost line instead.

Why would you want the boost to drop anyway ? lol