kika747

hey guys wondering as a general rule of thumb what afr i should be looking at as i am comming on to peak boost e.g. my peak boost is set at 20 psi so at 5 psi should i be 13.0 10 psi 12.50 15 psi 12.0 20 psi 11.80? any answers much appriciated

4b11slayer

Im running 12.8 spool up by 10psi im 12.0. 11.8 30 psi to redline on e85 of course.

kika747

Do you think it would be safe to run same afr as what you said you do on e85 or a bit richer because pump gas dosnt burn as cool as e85

ronaldo9

iTrader: (2)

Richer in my opinion. What do your plugs look like? Also are you experiencing knock?

4b11slayer

Pump gas should be 11.2 full boost.

kika747

I'm running 11.80 @ 14 psi full boost on my gt3582r and my plugs look great. So I'm thinking to get this gt35 to come on a bit sooner I should be running 13.0 afr @ 0 psi 12.50 @ 5psi 12.0 @ 10 psi and 11.50. @ 14 psi full boost what you guys think atm it's 12.50 @ 0 psi and and from 5 psi to full boost 14 psi it's 11.80 and seems very laggy

ronaldo9

iTrader: (2)

What does your timing look like? In my experience my gtx3582r spooled better with richer afr's but perhaps my timing is more aggressive than yours.

kika747

I'm running 7* from 3-3500 rpm 9* at 4000 11 at 4500 13* at 5000 and 5500 onwards 15* on 98octane pump unleaded so at peak Boost 14Psi I have 7*-8* timing at 3500-4000 rpm

kika747

So What do you think I can squeeze some more timing in or is it getting a bit dangerous putting more than what I have now

ronaldo9

iTrader: (2)

I could never run more than 4* at peak boost without knock which was around 25 psi on 93 octane and i wouldn't run more than 11* uptop 13* maximum but I have stage 1 cams. And I strive to hold an 11.2 afr. I usually get the fuel curve where i want it and then play with the timing. Be careful check your plugs and monitor the knock.

4b11slayer

I run *18 uptop on e85 tho

RazorLab

iTrader: (8)

Why on earth are you only running 14psi with a gt3582r? It feels laggy because you aren't running any boost.

kika747

Sorry I forgot to mention it is an rb30 engine in a vl turbo but posting here because I used to have an evo 6 and you guys know your stuff this has been the most knowledgeable forum to me and I have learnt most of the stuff I know from here so all Imput from everyone much appreciated