mindvexed

Up to this point I've gone the N/A route, but want to give nitrous a try. I recently picked up a dry plate setup using the HSW interface and am planning to work up to a 150 shot.

Relevant info on my combo is: forged rods/pistons, 11.7:1 comp, 0.035 quench, and a 237/248 111+2 LSA cam.

So my question is, given a good tune, can I keep running 91 octane (best I get in midwest), or do I need to switch to E85 (or add meth)?

Thanks for the input.

Milan

E85 is always the answer. It's magic.

Z06supercharged

Here we go again...

BLOWNBLUEZ06@RKT Performance

E85 tuned right is hard to beat, but you need to be aware that the mix may change from winter to summer by 15% and that will affect your tuneup. Most people who run it on their C5's seem to tune their own, or buy it out of a drum to better guarantee the blend is right. The blend changing won't cause any issues cruising around, but WOT can get you in trouble.

bradenW

I run Oklahoma 100% 91oct and 100% methanol injection in my c6z. 874/782 rear wheel at 12psi/6k rpms before belt slips. Nice to have that kinda power and Cruise where i want without worrying about my next fuel station. And gets good gas mileage.

mindvexed

Thanks for the input braden and blownblue. So is the consensus that I definitely need more octane one way or the other when I spray?

I don't tune personally, so the variability of the e85 is definitely a concern. The couple people I know that run it in the area said they've seen 10% swings in ethanol content in the past year. How much variability have you guys found the computer can compensate for in closed loop mode? If it’s as simple as getting a tune dialed in for the mid level alcohol content and letting the computer sort out the +/- 5% swings, then I’m on board. But if I need to stay within a percent or two, it doesn’t seem very practical since I put over 10k miles on a year.

As for the meth option, I like the idea of not having to worry about ethanol content. Unfortunately it doesn’t seem to be a very popular way to go on nitrous for whatever reason (setup cost maybe?), so there isn't a ton of info to work off of. Looks like I need to spend a couple hours reading up on it.

bradenW

Or do a stand alone. No way id do e85 on a car id like to road trip in.

Z06supercharged

Road trips just require some planning, no worse than a Tesla needing a recharge every 200 miles or so (can stretch to 230 but not much after that and ive limped to a charging station before). Ive seen a couple Teslas on the side of the road cause they just didnt quite make it to the next charging station and im more nervous in the Tesla vs when I had my E85 Z when needing go juice. At least with E85 you can still fill up with non E85 and drive it unlike a dead electric vehicle with no plug around.
Ive carried 10 gallons of E85 in truck of my Z06 many times just in case its no biggie doing that on a trip, but ive been stranded in the Tesla before....

bradenW

And i wouldnt own a Tesla for that reason even though They are wicked cool. To each his own. I can drive cross country tomorrow and require nothing but pants, i guess. Haha

mindvexed

If I can get an E85 tune that's flexible enough to work with the fuel in my area, I wouldn't mind going that route. For road trips I can always plug in hptuners and switch back to a 91 tune and just stay off the juice.

That said, I'm still interested in learning more about mixing nitrous and meth since the fuel would be consistent and I wouldn't have to beef up my fuel system as much.

MVP'S ZO6

If only it were possible to have a flex fuel setup in our C5...