300whp is the safe max on stock guts. 250whp is about your max with stock compression. However with e85, you should be able to safely make 300 whp, just for the pure fact combustion temps are gonna be way lower with the ethanol, which would decrease the chance for detonation. (that's just my speculation) I'm doing a spacer just because lower compression is always better for boost. Yes you can run 8psi on stock compression and make 250hp, but it's the "how long will it last" factor I want to get rid of. Many guys install stage 1 kits and never have a problem, however others (an alarming amount) installed the kit, and had it tuned by a good tuner, and had a meltdown a few weeks later. In my eyes, I think it cost me $300 for spacer, head gasket and cam gears. Alot better then $1500 for pistons and rods. Eventually I will upgrade those, but down the road. I just wanna get it on the road. OK, I'm off my soap box!
oh, I'm going to tune for 300, but turn it down to 250. One of the advantages to boost referenced fueling .
You're correct, e85 will solve a ton of the issues with higher compression due to the lower combustion temps as well as the higher octane. It will also make more power, especially on a non-intercooled setup
Does that 300whp on stock guts include stock head/case bolts?
I think you're wise to do it the way you did. Better to get less headache now than have to fix a melted motor during riding season! I'd love to see progress pictures of you dropping the motor, doing the spacer install, etc. This is my first motorcycle build, and I think it would help to see someone else progress through it for future reference LOL
I personally am running 100% stock guts, for 2 reasons: first, I'm planning on running e85 most of the time, and second, I'm at high altitude (6500feet elevation), so the effective compression ratio is much lower up here. If I do a compression test, the numbers are much lower at our altitude than for the same motor at sea level.
I'm only expecting around 200whp on 7psi on 91, simply due to the altitude. When I log boost from a MAP sensor on the standalone, I typically see about 3psi less boost than a boost gauge shows. So I'll see 7psi on my boost gauge and 4psi on my standalone (all due to altitude). So, 4psi of boost on a motor that is "effectively" significantly lower compression than 11:1. I figure 200whp is much safer than 250whp on stock internals on 91 octane. Also, I'm running a standalone, so I'll tune the ignition time correctly. I'm going to have to turn the boost up past 7psi to hit what most sea level guys make at 7psi, I'm guessing around 10psi. Well, 10psi is heating the intake temps up more than 7, and without an intercooler, I'll have to rely on the e85 being my intercooler
So in short, I plan to tune 7psi on 91, then drain the tank, fill with e85, tune on 7psi the same day, and I'll post overlapping dyno graphs. After I get used to it at 7psi, I'll install my old AMS1000 and turn it up to whatever boost it takes to make 300whp on e85 and get 'er dun