R33 Gts-T Boost

[Nashey]

Hi all ! how are we?

Im new to this site so first topic post!

I have a 1994 R33 Nissan Skyline Gts-t manual with usual mods, boost controller, Front mount,exhaust, pod, fuel pump and fuel Pressur Reg and Clutch, I recently put a garrat GT3076R high flow in and its very awesome! runnign 12 psi she sings. but planning to get an ECu put in and tuned so i can run more boost with safer levels as now the ECU doesnt quiet adapt to the higher boost haha

my question is , before with the Stock Turbo, when i would wind the boost up to 12 psi it you's to R/R (Rich and Retard) and cut but now when i wind it up i can go to 15 psi if i want and it will take it ! and wont R/R just wondering if there is some sort of Mathimatics going on there with the air flow? my boost controller is of the Throttle body so it reading is Correct....

its a spinny one has had me thinking about it for a while! could it be that it isnt actualy getting the correct amount of boost? in order for it to R/R.

I went throught the trouble of putting the older turbo back on to test and bam! 11.5 PSI R/R !! put the bigger flowing turbo on more power at same PSI with no R/R at all.

Its not a major issue, i would like to know if it could be doing harm? amd should i be worried? and if you have the correct answer to this?

Thanks!!

[mad082]

Rich and retard works off loads at different points of the rev range. So the point in the rev range that was triggering the rich and retard is probably getting lower airflow with the bigger turbo. This means it was probably lower in the rev range. The stock turbo comes on boost by under 3000rpm. Your new turbo won't be making as much airflow at lower rpm.