In need of more power from my 2.5 gto

[rsnoble]

Can anyone give me any advise on the best mods to go for but still running on the safe side, I'm used to a 400 bhp escort cossie, witch kicks you in the ass, the handling is great it just need that extra little bit? or has anybody got any mods (parts for sale) thanks for your help, ow and could you tell me the kind of bhp I'm looking at getting
thanks for your advise

[Lakelord]

Intercooler and Roush exhaust in that order. Once the exhaust is fitted, you'll need a re-map. Yellowshed can do this for you on a Rolling Road.
You should also upgrade the Fuel Pump and wiring loom when fitting the exhaust.

ETA, the 2.5 had the open diff which doesn't handle all the horses that the above will give you so well so you might want to start saving up for a LSD at the same time!!

Edited by Lakelord on Monday 15th September 20:16

[rsnoble]

what about upping the boost a little with the re mapp, is the lsd easy to get, iv been told geting the gearbox out is nightmare job? tho I'm a tec and have access to a ramp?

[alex s]

rsnoble said:

what about upping the boost a little with the re mapp, is the lsd easy to get, iv been told geting the gearbox out is nightmare job? tho I'm a tec and have access to a ramp?

The factory upgrade for the 2.5 was a ebc and boost increase/remap.
Lsd is standard quaiffe, gearbox - is engine out, or cutting crossmember and refitting.

How about just putting a 3litre in instead?

Edited by alex s on Monday 15th September 20:39

[rsnoble]

id probaly be best to just sell the car and to get a gto 3, saves the hassle, and getting hold of engine and loom is a pain, thanks for the tip tho

[peterguk V6 KWK]

alex s said:

How about just putting a 3 litre in instead?

Now that's a damn good idea

[rsnoble]

im guessin you have a 3 liter? im stuck with the 2.5 for now, so that why im tring to find that bit extra?

[peterguk V6 KWK]

rsnoble said:

im guessin you have a 3 liter? im stuck with the 2.5 for now, so that why im tring to find that bit extra?

Was lucky. Picked up a complete M400 transaxle, turbos, manifolds, loom, ECU etc... 2600 miles.

Have added some valve springs, injectors, fuel pump etc.. Ready for turning up the boost at a later date. Swapping this Autumn.

Edited by peterguk V6 KWK on Tuesday 16th September 00:05

[rsnoble]

how lucky was you, that seams the way forward, im guessing that made a good improvement? was it hard to remove engine and loom ?

[mgbond]

rsnoble said:

im guessin you have a 3 liter? im stuck with the 2.5 for now, so that why im tring to find that bit extra?

I had a after market ecu fitted and am currently running 340bhp on 0.8 boost. will be upping the boost to 1bar soon (although this is a boost trim adjustable from wastegate to 1bar and i'll run it at 0.9).

I had the LSD fitted a while ago as mine broke.

If i was to take the box out again it will be from removing the chassis bar.

Would get more if a propper exhaust was fitted.

Bondy

[peterguk V6 KWK]

rsnoble said:

how lucky was you, that seams the way forward, im guessing that made a good improvement? was it hard to remove engine and loom ?

Not installed yet. I have my own MR2 business so fully equipped workshop. I'll post reports when i start the job.

[rsnoble]

lots of people seem to opt for the lsd, if mine broke id fit one but to take it out just to change it seems a nightmare, i do fancy a 3 liter now i may have to go test drive one to see the difference?

[rsnoble]

mr2 you are a brave man, iv had a few dealings with them, i used to do alot of tuning for surperships, and iv seen people with big power, yet they seem to go bang alot of the time,

[peterguk V6 KWK]

rsnoble said:

yet they seem to go bang alot of the time

Not if they are built properly

TBH, pretty bulletproof.

[NobleGuy]

rsnoble said:

Can anyone give me any advise on the best mods to go for but still running on the safe side, I'm used to a 400 bhp escort cossie, witch kicks you in the ass, the handling is great it just need that extra little bit? or has anybody got any mods (parts for sale) thanks for your help, ow and could you tell me the kind of bhp I'm looking at getting
thanks for your advise

I got mine modded with a remap, cam timing change and larger intercooler.
Currently running at 410bhp.

The company that did mine seemed to think that if you add the slightly larger turbos and a decent exhaust it would run at around 500bhp, although it's possible you'd need an upgraded gearbox/clutch with that, or expect the existing one to go bang at some point. Mine's a 3 litre so not sure how that might apply to a 2.5.

[Lakelord]

rsnoble said:

was it hard to remove engine and loom ?

Terry, the reference to the loom is just to replace the wiring to the fuel pump... very simple job.
With regards to engine out, there's now a process to cut a cross member out to facilitate the removal of gearbox and diff without removing the engine. The part is then welded or bolted back in after the jobs complete. Not sure it would save much time the first time it's done but if bolted in, would save time in the future.
Don't know anyone that's used this method. Anyone like to comment?

[D_G]

Would prefer to remove the lump rather than cut the chassis. Mine's cut underneath too when the track sump was done by the factory. No way is another air hacksaw trimming anymore sections from the chassis!

Dave

[NobleGuy]

Lakelord said:

Don't know anyone that's used this method. Anyone like to comment?

Yes. Bolt-on section now in place.
Hasn't changed the dynamics of the car at all as far as I can tell.

[Lakelord]

NobleGuy said:

Lakelord said:

Don't know anyone that's used this method. Anyone like to comment?

Yes. Bolt-on section now in place.
Hasn't changed the dynamics of the car at all as far as I can tell.

Who did the work and if you don't mind divulging, how much? Or put another way, how much did you save by avoiding taking the engine out?

[NobleGuy]

Lakelord said:

NobleGuy said:

Lakelord said:

Don't know anyone that's used this method. Anyone like to comment?

Yes. Bolt-on section now in place.
Hasn't changed the dynamics of the car at all as far as I can tell.

Who did the work and if you don't mind divulging, how much? Or put another way, how much did you save by avoiding taking the engine out?

That's a toughie. I spent £3.2K getting a new Quaife diff, master/slave, fuel pump wiring, aircon regas and service. The guys that did it were Elite Motortune in Northampton and from what I remember they took around 8 hours to remove the gearbox and clutch. Think the quoted figure for an engine out is around 22-24 hours. Not sure if the 22-24 includes putting it back in again. But there's definitely some savings in labour there.