yea I was planning 91 and water/meth. no 93 here that ive seen!

here is what ive found. everything else is 91.

http://www.cosportbikeclub.org/local/highoctane.html

found 2 e85 stations. about 20 mi away from me(not proven that they still sell it). the others are 50-100+ away

 

I'm just saying, with that compression and boost you're leaving no margin of error

 

I agree. I may reconsider CR, but we'll see as it gets closer. Reason I went with 11:1 is if I really wanted to I could stay NA and push nitrous instead. not the best for max power on boost, but it should handle decently if built properly. I may try and get tuned on 100+ octane since its more available than e85 here..

 

What pistons did you actually buy?

Because 11:1 is typically designed for NA... Meaning the piston strength won't be up to boost requirements. From what I understand, most NA pistons get material removed from them vs their boost counter parts, to save as much weight as possible. I'm not sure if the material changes too, because I know they put a priority on making the piston lighter. VS for boost you have to deal with a much greater thermal load, and pressure load.

If it's a NA piston not designed for boost, you might flat out break it.

If it's one of the custom high comp boost pistons then you'd be ok. But even then I don't like the idea of above 10:1 on boost. It works, but the extra power... I don't think is really worth it. There are other ways to get better response, and more power/spool that don't put your engine on the knife edge.

 

thanks for the input resmarted. They are wiseco 11:1 and actually heavier than the 8.8:1 pistons. so extra material and nothing removed and same material as the low comp version. With the tomei 280/11mm cams, that should help out on the compression a bit i'm guessing.
Here is the current parts list of what I Actually have now:
Wiseco 11:1 96mm pistons
HKS headgasket
ARP main studs
ARP l19 head studs
Tomei 280/11mm intake and exhaust cams

I also plan to call up wiseco to see if I can buy upgraded wrist pins if they make a heavy duty version.

 

They do I have them. They're much much thicker and stronger. Heavier too obviously. Not too expensive either.

 

so the wiseco's should handle boost fine then? or a 250+ shot of nitrous, depending which route I decide to go.

 

I don't know of the specs of the 11:0 Pistons. But the ring gap will be very important in deciding what you can do to that engine. Same with the block machining. Wisecos require extra room for thermal expansion at the piston. They have more aluminum than JE etc pistons, so they expand more. This means you get some piston slap at cold start, but in theory the material will be "stronger"

Definitely should call wiseco and ask them what to do for clearances and to order those wrist pins. They know what they're talking about.

 

Thanks! Will definitely be giving them a call when i have some time.

 

havent called wiseco yet, but they have the pin upgrade listed in their catalog. It is the same material, just 1mm thicker walls. still worth it for the $80 that it costs though for a little more safety. will definitely pick them up.

I need to call them about bore sizing and wristpin/piston power handling at the same time.

 

I like My BC Con Rods! They are holding just find.... 900+ ponies...

 

nice! thats great to know. are they the 625+ rods, or lower series?

 

Mine definitely were thicker than a 1mm bump, and looked to be a different material. At least that's what the machine shop said (not dynosty). Could be different now though.

 

If you guys have a link to the upgraded pins, can you post it up please?

 

http://realstreetperformance.com/Rea...at-Anchor.html

http://www.wiseco.com/Catalogs/Sport...ccessories.pdf

Wiseco's off the shelf wrist pin upgrade is the same material as their standard wrist pin, just 1mm thicker, I think they're $20 a pin.

 

 

OEM rods will almost handle 2867's power output.

 

Highly doubt that. Maybe if it was a single 2867

 

I'm using K1 rods for my build and I plan on pushing it past 850 with spray. (I'm also 11:1)

 

Ended up ordering Pauter rods. I think they should definitely be more than enough rod for my use!