baz4077

hi does anyone know how to take out the rev limiter on a s2 rst

Karlos G

iTrader: (4)

Unless you are running H section forged rods I wouldnt do it, you'll easily throw a rod mate.

baz4077

ok what should the rev limiter come in at as mine seems to cut in at 6000rpm and still seems to be pulling up to that point and would beyond but main reason im asking is i am running a 285t2 cam and really dont like it and was looking at a cvh34 cam and the write up states power 1500rpm to7000rpm but so many cams to choose from i don't know what one to go for i take it the rev limiter is built into ecu and mine is a bajoo one

rubinsbin

call me old fashioned but isnt it there for a good reason!!!
remove it and your back again asking about an engine build!!!

Karlos G

iTrader: (4)

6400rpm is stock, your rev counter probably under reads by 500rpm high up..... most do!
Yes the limiter is controlled by the ECU (black fuelling ECU).

The 285T2 is a shit profile IMO very laggy, the 285T, Kent CVH34, Newmans with solids, or even a stock cam is much nicer

Versus_Creations

iTrader: (1)

Get a S1 fuel ECU and you will have a further 500rpm in before the limiter. Or you can change the component in the S2 fuel computer to get the same result.

baz4077

i have a spare s1 black fuel ecu will it change anything else by using one thanks

Karlos G

iTrader: (4)

Yes you will need to rewire your TPS if you use that, cant remember exactly which wires you need to change though

StephenC

you sure karlos? not doubting you but dont recall Karl changing mine when I went from hearts and diamonds to s1???

Karlos G

iTrader: (4)

We are talking about the black fueling ECU, thats what controls the rev limit not the silver one mate.

StephenC

Ah, I see, mine had the rev limit removed from my s2 one so that explains not needing to swap wires.

baz4077

thanks for all your advise where would i find out which way round the tps wires would have to be as there are only three so wouldn't be hard and i have also heard about running a vacuum pipe from the fuel pressure regulator to inlet is there any truth in this or any advantage as its open to atmosphere at the moment and most cars have a vacuum to the for thanks

AstoN_B

iTrader: (1)

For what it's worth to an old thread;

From what we've worked out while trying to understand the MFi system best as we can, the fuel pressure reg vented to atmos is a crude form or barometric correction to the 'base' fuel pressure.

As we know the rise in pressure is taken care of by the ecu and the fuel pressure adjuster fitted to the distribution head. The base pressure it rises from is set by the baro correction.

I like to think of the electronic adjuster as more of a flow destructor than pressure adjuster. Easy way to test is to put fuel pressure gauge at each point in the fuel lines around dist head and suck/blow a tube pushed over the nipple on the pressure reg.