tunning for the first time help

For discussion of front-drive SR20DE, SR20VE and SR20DET engines!
detune
Posts: 4
Joined: Fri Mar 14, 2008 3:14 am

Post

hi all i'm a noob on the forum and as the title says new to tunninglast night i tuned a safc2 on an sr20det fwd, i am not sure what was expected in terms of how much power the car would have made so i just wanted some suggestions

the car has a turbo similar to a gt2871R or a disco (ebay turbo i think) .86a/r, 38mm external wastegate @ 10psi,walbro fuel pump and an aeromotive fuel pressure regulator set at 43psi, it has the stock injectors,ecu,airflow the exhuast is 3"

on the first run it made 198whp but the air/fuel ratio was going rich to point where the wideband gauge was maxed out. so i leaned it out after a couple runs an the hp kept goin up an up an up but it was still staying rich like 10:1 from 4000rpm and up, i thought it wierd an the owner informed the car didnt have any stock o2 sensor anyways he said keep goin even if the engine blows up lol so we ended up wit 253whp and 237wtq at the same 10 psi

is that a good hp level for the boost and mods that we have??

i could have leaned it out more but it was already at like -27% in the higher rpms on the safc an the air/fuel ratio was still at 10:1 or less but i figured with no o2 reading to the ecu it was running an extremely rich map an i figure the injectors would have maxed out or something...so any suggestions,tips or criticisms would be appreciated



nametakennow
Posts: 10024
Joined: Sat Aug 24, 2002 4:14 pm
Car: '06 MINI Cooper S

Post

That hp number is pretty solid

Get the O2 sensor in and go from there. 11.5-12.5:1 is better, and depending on what DET it is you may be able to go even leaner.

detune
Posts: 4
Joined: Fri Mar 14, 2008 3:14 am

Post

thanks man, its an aveneir sr20det but its only swinging 6500 rpm i figure due the ecu being an auto ecu, the timing was set at 15 degree BTDC is this to advanced? i wanna see if i can make at least 260 with the 10psi an the crank the boost to about 16psi with some injectors from the sr20vet (xtrail gt)

nametakennow
Posts: 10024
Joined: Sat Aug 24, 2002 4:14 pm
Car: '06 MINI Cooper S

Post

I'll have to do some digging. Not sure what the stock timing is on the Avenir.


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