ok i have nearly finished the cosmetic stuff on my car now looking at engine mods first im doing a manual conversion at some stage
what im asking is what advice can you guys give me towards moding the engine ecu etc
its a standard tj exec 3.5litre
what ecu mods can be done or is this betteroff doing after other mods?
im new to the engine modding so thats why i ask you guys
can some one tell me how much lower the springs in a vrx are than standard i got lows on front want to match the rear up but due to having lpg the back sits lower than standard

Check out the Qld section, there's an SKR ECU reflash happening soon. Good value for money as he just tunes the stock ECU. Your only problem is that if you were to do a fair few mods you'd want it retuned, and it'd be pretty difficult to re-do since he's in SA and he's the only person in Aus who can do it.

VR-X springs are only 10mm lower than stock. If you have King Lows in the front, try King Low SP springs. They're a touch firmer and sit 15mm higher than Lows.

king sp never heard of those might look in to thant thanks ill have a look at the ecu now thanks

How far do you want to go with engine mods?
Simple bolt on stuff or full out rebuild for max N/A power or even forced induction?

From simple

replace muffler for free flowing 'sports' muffler - I think the exec one is restrictive and this provides a power increase, plus the additional sound.
replace exhaust from after the cat to the muffler
replace cat for hi-flow version
replace headers with extractors, either Pacemaker or HM.
open engine and go crazy - cams, headwork, etc
bolt on superchargers
custom twin turbo and ECU
to big $$ and power

and once you've finished with the mods, if you've still got the factory ECU then get SKR to retune it.
I'm thinking that even a posted ECU will be good value for money. Does SKR need to know what fuel will be used for that "optimal" tune?

Have fun - I am too!

thanks mate looking at getting a doner car next year for the engine and gearbox so as i get the money i can rebuild a engine as you siad all come down to money