JGM Re-map

Had a re-map session on the road and dyno with the Jolly Green Monster (Simon) yesterday

I went to see him because a previous mapper had left me with an intermittent fuel cut problem

I have the following relatively minor engine, exhaust & induction mods:

1. Milltek turbo back de-cat 3" exhaust system - I left the high flow sports cat off this time to see what difference it made
2. Forge/Litchfield (in the wing) Cold Air Intake - I have taken the fog light out to let more air flow into the inside of the wing
3. Magic Tree Air Freshner - Pine Flavour

Made 370bhp & 380lbft on the first few runs, but due to the quad pipes (dual exit) on the Milltek back box, it was flowing differently on each run i.e. on one run the exhaust gases would take the shortest route out of back box, other times they would not. So we were getting lean then rich runs with the same ecu settings. So to be on the safe side Simon knocked it back to 366bhp & 375lbft in the end.

I was running 355bhp before so the difference is not that big, but after a long test drive last night I can say that the power delivery is much smoother and progressive than before, very good map, I am very happy

The only downside is seeing other monster Impreza's at the dyno that make you want to re-mortgage the house to get a forged bottom end, big injectors & fuel pump, a big turbo and all the other supporting mods and go for 500bhp!

It'll be interesting to see if Rob had a similar issue with his when it was remapped as he has a different exhaust.

One question, how do you know what your air freshner tastes of?

Paul.

nope not of that with the exhaust on mine, took the readings from the drivers rear tailpipe were it flows slightly more due to the y piece split in the middle 380bhp 403ft/lbs very consistent around that area after numerous runs and tweeks

Yeah, this sort of setup (seperate rear pipes) looks like the best option for serious power...

https://www.youtube.com/watch?v=Gt2oeV2ACzQ&feature=related

https://www.youtube.com/watch?v=T1ngqNg2pKo&feature=related

But honestly, I am very happy with 366bhp I can tell you, still makers for a great drivers car for day to day, especially on the twisty roads I like the best...

I think I wanna move to Santa Monica.

1200 bhp hatch Impreza, 1.9 sec 0 - 60, 8.9 sec 1/4 mile ... WOW



So lots of tuning potential as seen from those 2 youtube videos....

Rob wrote:nope not of that with the exhaust on mine, took the readings from the drivers rear tailpipe were it flows slightly more due to the y piece split in the middle 380bhp 403ft/lbs very consistent around that area after numerous runs and tweeks

I expect the gas to find it's easiest wy out, and if there is back pressure at the ear box then the gas will go the other way! All the same, I expect, to the engine and turbo... which will only be working against post turbo back pressure and hence exhaust gas temps?


Since H&S exhaust are hand made, perhaps Ian @ H&S etc. could fit a proper Y pipe in to split the gasses more evenly, or even do a twin pipe from downpipe as in the vids above!

Neil

Paul666 wrote:

One question, how do you know what your air freshner tastes of?

Paul.

Paul - I think it was Pine ?

vulnax wrote:

Paul666 wrote:

One question, how do you know what your air freshner tastes of?

Paul.

Paul - I think it was Pine ?

Neil,
I was joking as Dave called it Pine flavour.

Paul666 wrote:

vulnax wrote:

Paul666 wrote:

One question, how do you know what your air freshner tastes of?

Paul.

Paul - I think it was Pine ?

Neil,
I was joking as Dave called it Pine flavour.

You mean you DON'T lick them to activate them... Doh! ;-)