boost pressure T25

[Mr.Ford]

Hi, I was wondering how many psi / bar boost pressure you all got on you T25 Escort’s. And what modifications and what sort of power output.

[Simon T]

Mines standard, 8 second overboost to 1.3 bar then drops back to just over 1 bar. Car has done 240bhp on a number of different rolling roads so it's a tiny bit up on standard, possibly due to the only mod being a mongoose exhaust and CAT.

[Mr.Ford]

That’s good power for a ‘standard’ car!

[Simon T]

I think it's just down to the exhaust - it's done 240 to 243 on 5 different rolling roads. It also produces the peak 500 or 600 rpm earlier oddly, so don't have to ring the engines neck.

[mondeofreak]

I've done much modification, But no rolling road test over boost is 1,8 staying boost is 1,5. But no original ECU. Ignition is EDIS. Exhaust is Mongoose I guess never find a name on it.

[Mr.Ford]

I've done much modification, But no rolling road test over boost is 1,8 staying boost is 1,5. But no original ECU. Ignition is EDIS. Exhaust is Mongoose I guess never find a name on it.

you won’t be using the original turbo then. And not running eec4 management?

[jsa]

Peak boost is 1.8bar. Mongoose exhaust.

[mondeofreak]

No, my original t25 was going too meet manitou. But with a bit luck i get a used t28 Hybrid from Suhe. First I've used a EEC4 chip but din't work good. And after it fall of between a event. I decide to use a megasquirt derivat for a long time. But now I use a original DIYAutotune/ AMP/EFI MS3Pro.

[phs84]

Peak 2 bar, hold 1,6...381hp with t35 and haltech ps1000

[midnight_man]

carefully with that EEC tunnings! Always use AFR gauge!!! Small turbo is very often running LEAN at WOT....this can cause piston melting, engine damage... MAFs are cheating... OE injectors are very small, they are hitting 100% dutycycle at higher loads....

I think every small turbo needs custom tuning !!!! universal chip for smal turbo can be little dangerous.

over 350 hp is to discuss...as OE maf has very short space to measure,, 870Kg/h which is not enough for high boosts. From my tests 1,2 bar peak then 0,6 bar at 5500rpm are max....if you will put higher boost, you will have LEAN mixture at load.

next problem is LOAD calculation inside ECU....spark map is calculated only up to 170% load, which OE chip can produce (no more then 160?).
ecu si capable to calculate 200% load.
with bigger turbo you will achieve 200% load at half way = you cant control spark over 200% load! so you will have same spark advance...

there are more things to discussion...

[jsa]

MAFs are cheating...

Your particular MAF was broken, even before you attempted to tune. Evidently the replacement part works.
Trying to tune with broken parts will never work on any ECU system.

From my tests 1,2 bar peak then 0,6 bar at 5500rpm are max....if you will put higher boost, you will have LEAN mixture at load.

Those numbers depend on what turbo you have bolted on. Different Turbos give different mass flow vs pressure values.

Your issue, is that your upgrade injectors need to be replaced with even bigger ones.
Likewise you need to upgrade the MAF to a bigger one

spark map is calculated only up to 170% load

You can change 170 to a different value, so long as you are prepared to adjust other parameters.

which OE chip can produce (no more then 160?).

It does what it is configured to do. Reconfigure, as you have, too suit your needs.

ecu si capable to calculate 200% load

You have received info on how to scale load.

[Mr.Ford]

Nobody with a t25 who has just a chip/exhaust/filter on std injectors and management ? I want to compare the boost pressure which I have with some others.

[Santu]

Nobody with a t25 who has just a chip/exhaust/filter on std injectors and management ? I want to compare the boost pressure which I have with some others.

I am running an original T25 with onlu exhaust and K&N filter in the original airbox, though the exhaust is custom, you can't find on the market, basically i am running the original elbow and then having just one silencer and final end muffler, all with original T25 eeciv

[jsa]

Nobody with a t25 who has just a chip/exhaust/filter on std injectors and management ? I want to compare the boost pressure which I have with some others.

1.8bar

[midnight_man]

2.3 bar peak pressure....but heavy mods on EEC software! bigger injectors....etc.