nfantbabyjesus

i know this isn't the tuning subsection, but im not a tuner and i figure being FI has an impact. im running V3-si headunit with Jam Cam and 100% e85. im wondering what people with similar setups are seeing for timing. my tuner said he has my tune set safe, currently 16-18* of timing, but im just wondering how safe it's currently at. Is it worth pushing it further, or should i just stay were im at as there isn't much more in it worth risking.

Turpid porpoise

neutron82

... if you want to see if you can get more out of it then have him add more timing until the gains are minimal and not worth it and then back off a degree or 2... if you are going to be running full time on e85 and don't have a flex fuel setup I would keep an eye on the concentration you get at the pumps compared to what you are tuned on because if it varies by a substantial enough amount it will change your afr's

BLOWNBLUEZ06@RKT Performance

If it's tuned properly, there shouldn't be much on the table. When it comes to proper tuning, there's an exponential curve where your gains between a conservative tune and aggressive should be minimal, which means that adding any timing might gain you something like 8whp and risk losing your motor if something important changes much.

neutron82

that's what I was trying to say lol

nfantbabyjesus

thanks guys. my tuner is VERY experienced and also a good friend of mine. i was wanting to put it on dyno to see where it sat and if i could get more out of it, but he was hesitant because the car runs great and he says it's pretty damn close due to how it's running and how the tune looks. we met up today at a shop and the shop didn't have any time for dyno tuning so we took that as a sign from the Big Man up above. ha. im going to enjoy the car for now (it's freshly finished) and meet up in a couple of months at a track or so.

thanks for the responses.

juice12

My car makes 840rwhp with 15 degrees, ls6 heads, pretty big cam. 410 ci ls2 14lbs boost, shorty headers that dont flow lol

95vettski

Is that on E85? whats your static compression?

juice12

Yes e85, 10.5 to 1, sorry for the slow reply

Podium

I agree. As a tuner, I cant stand the words, "mild or safe tune". Like Brett said, its either conservative, aggressive or close to optimal.

My car made 12 horse and 4 plus torque at 18* than it did at 17*. I left it at 18 cause I like to party and its on E85( More like E90 at my local Holiday). It could have made more but I saw no reason to as results from added timing were becoming minimal. I wouldn't call 16-18* of timing "safe", its more towards optimal from what I have seen on other boosted set ups on corn. A friend of mine made max power at 13* with a cam only, SI V3 E85 ls6 set up. When I tune boosted set ups I leave timing at 10 to 14 depending on set up until it gets on a dyno. My car was set at 12* until I got to the dyno and I ended up at 18. Picked up 60 or 70 Horse but I would have never known that with out the dyno. It could have stopped at 14 making power and I could have had timing up to 20 plus degrees before seeing knock on E.

Podium

I know hes your friend and "VERY experienced" but what? You cant just look at the tune file and say, "wow that looks good".

Friend or not, but you need another tuner. Hes being lazy.

SVT_Z06

What's the afr at?