Do I need a remap ?

[bzguy]

Been a while (busy renovating/adapting house), but I do have a question on my M12 GTO (2.5) :

I did a couple of sensible upgrades : new exact 2nd rad fan in front, exhaust changed (box is gone, replaced by straight pipe), M400 fuel pump + wiring installed.

Do I need a remap now ? What would I benefit from ?

YellowShed is the man to speak to ? (whereabouts is he ?) How much would it set me back ?

[andygtt]

I have a 3L and I did the exhaust and did 15k on it without needing a remap... of cause there is more power to be had so do it for that reason but ONLY if you have an LSD.

£500ish from memory

[F.C.]

bzguy said:

Been a while (busy renovating/adapting house), but I do have a question on my M12 GTO (2.5) :

I did a couple of sensible upgrades : new exact 2nd rad fan in front, exhaust changed (box is gone, replaced by straight pipe), M400 fuel pump + wiring installed.

Do I need a remap now ? What would I benefit from ?

YellowShed is the man to speak to ? (whereabouts is he ?) How much would it set me back ?

I'd at least get a quick shakedown run on dyno to make sure the fueling is ok.

[Chapppers]

If the car has never been remapped, it's probably on a st map at the moment, so I'd recommend it, especially if you have the electronic boost controller the slightly later 2.5s have.

Yellowshed would probably say you should have the uprated intercooler and strengthened valve springs for the best results, otherwise you'll lose about 10% when the car gets hot and he'll have to drop your rev limit to prevent valve bounce.

[Gadgeroonie]

if you have an early 2.5 ecu - it may not be possible to remap it !

do you have the mbe ecu ?

the 2.5 can be remapped to safe levels without the need for a LSD

i suggest you do the fuel pump mod and fit stronger actuators

with the extra torque you will wonder how you enjoyed it before !

[bzguy]

thank you guys, what I do know :

- it does have the later MBE ECU (& wiring loom ?!)
- no stronger actuators (as I know) -> easy install ?
- no uprated valve springs
- no LSD afaik
- new IC is on my wish list
- it says "Bosch mapped" on the MBE ECU
- car no 59, would it have electronic boost controller ? How can I check ?

Edited by bzguy on Thursday 25th April 10:03

[Gadgeroonie]

how much boost does it run ?

[mgbond]

Gadgeroonie said:

...i suggest you do the fuel pump mod and fit stronger actuators...

Thought we had this discussion on a previous thread. There is no need for stronger actuators. The 2.5 has 0.5 actuators and they are fine for over 400 if not loads more (but I can only comment on 400 as I have them)

Bondy

[Gadgeroonie]

yes - but in my experience if they are the original ones they may have gone soft / siezed

making a remap impossible

[mgbond]

Gadgeroonie said:

yes - but in my experience if they are the original ones they may have gone soft / siezed

making a remap impossible

Ah ok. So replacement set not necessary bigger a bigger set?

[wessexrfc]

Gadgeroonie said:

yes - but in my experience if they are the original ones they may have gone soft / siezed

making a remap impossible

When I took my stock 3R for its first remap the actuators had gone "soft" Still able to remap, not impossible but it would have been easier to have done with new acuators fitted before than after.

Trevor Jasper (Yellowshed)
Email via link (top RHS)
http://www.pistonheads.com/gassing/profile.asp?mem...

[bzguy]

Will have a look later today how much boost is does ; will send you an email too Trevor, thanx !

Don't about the actuators gone soft, car has only 13k miles :S

[wessexrfc]

bzguy said:

Will have a look later today how much boost is does ; will send you an email too Trevor, thanx !

Don't about the actuators gone soft, car has only 13k miles :S

Mine had done 15k when I had mine done, think its more an age thing.

[Blu3R]

One of my actuators (rear) was shot at 17k miles. The other wasn't much better although still the correct colour.

[bzguy]

Just back from a quick test drive : dial shows about 0,7 bar boost

[YellowShed]

That is correct and standard for the 2.5s - they have 0.7Bar capsules and don't seem to suffer from age weakening that the 3.0ls do with the 0.3Bar caps. You don't appear to have electronic boost as it would go to just over 1Bar and drop back to about 0.9Bar at the top end.

YellowShed

[mgbond]

YellowShed said:

That is correct and standard for the 2.5s - they have 0.7Bar capsules and don't seem to suffer from age weakening that the 3.0ls do with the 0.3Bar caps. You don't appear to have electronic boost as it would go to just over 1Bar and drop back to about 0.9Bar at the top end.

YellowShed

0.7 is std for 2.5 with control and 0.5 off the actuators isn't it? 0.9 was M400 or if you had a remap

Edited by mgbond on Thursday 25th April 21:13

[2.5bluenob]

mgbond said:

0.7 is std for 2.5 with control and 0.5 off the actuators isn't it?

My 2.5 was on 0.7 actuators as standard i think. And it had now electronic control.
steve

[mgbond]

2.5bluenob said:

My 2.5 was on 0.7 actuators as standard i think. And it had now electronic control.
steve

I believe the actuators were 0.5 on the 2.5 and there was a control to let it boost to 0.7 bar as std.

My car has STD actuators and if I turn off boost control own the ECU (after market ECU) the car will boost to 0.5 as running just off actuators?

[2.5bluenob]

mgbond said:

I believe the actuators were 0.5 on the 2.5 and there was a control to let it boost to 0.7 bar as std.

My car has STD actuators and if I turn off boost control own the ECU (after market ECU) the car will boost to 0.5 as running just off actuators?

What build number is your car Bondy?