12:1 compression h1 piston?


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12:1 compression h1 piston? - 11/7/2008 5:16:47 PM

MUDTECHinc

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I have been thinking about getting the 12:1 piston from speedwerx for my 650 H1 that i just put together has anyone ran this and how do you like it? what octane fuel can i run with this piston? 93? Also has anyone ran the PCP cam?

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RE: 12:1 compression h1 piston? - 11/7/2008 6:17:29 PM

TBONESGRIZZ

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I'm almost certain that you can run the 12:1 on 93 octane pump gas no problem. Elaborate on the PCP cam because I am looking at this same setup for my 700H1... Also, PM papa_slap... He has already done some extensive research thru CP and HotSeat on this setup I believe

< Message edited by TBONESGRIZZ -- 11/7/2008 6:21:19 PM >

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RE: 12:1 compression h1 piston? - 11/7/2008 6:59:01 PM

MUDTECHinc

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pcpoffrad sells a decent amount of parts for the 650 motor. they have the 670 11.5:1 compression big bore and a couple stock bore pistons. along with a cam that has .365 lift for 285 deg. which is alot more lift than the cam that I have in my 650 now. I am running the web cam out of the 500's and it is allright but I think it is pretty close to stock.

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RE: 12:1 compression h1 piston? - 11/7/2008 9:23:45 PM

papa_slap

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i don't think that cam is the one you are going to want to run with that duration and lift, it's angled more towards a mid to high range cam the one from speedworx is more of a overall range cam - low-mid-high rpm range. JMOP. I have the 11:1 speedwerx piston and it made a world of difference. I am personally waiting for the speedwerx 700 bbk set up with the 12:1 ratio which would be borderline pump gas (93 octane).

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RE: 12:1 compression h1 piston? - 11/7/2008 9:27:31 PM

GWC

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yeah waiting for that 700cc HC piston and cam

But to that one question 12:1 safe on pump gas..?? just seems like it would be to high for pump gas...?

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RE: 12:1 compression h1 piston? - 11/7/2008 10:26:31 PM

Black Cat 650

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I know in the car world, 11:1 with aluminum heads is borderline for pump gas. Aluminum will dissapate (sp) the heat better than cast iron.

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RE: 12:1 compression h1 piston? - 11/7/2008 10:33:38 PM

GWC

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yeap thats what i thought as well, once you get over that normal pump gas dont cut it just did not no if a quad motor was any different because some said you could run 12:1 on pump gas..
I still think iam going to get the 11:1 piston and then get s N.O.S kit and spray it as well..lol just a small shot..

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RE: 12:1 compression h1 piston? - 11/7/2008 10:33:41 PM

TBONESGRIZZ

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Well there was someone in the Cat section that posted they were running 12:1 on pump gas with no problems. You could run E85 or off the shelf octane booster if need be and still comply with HLPSR and CMR Pro B class rules I think as long as it's not "Race" gas...

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RE: 12:1 compression h1 piston? - 11/7/2008 10:40:03 PM

papa_slap

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I think you could run the 12:1 on 93 cause i can run my 11:1 on plus and it doesn't ping but it doesn't run as well as when i run super.

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RE: 12:1 compression h1 piston? - 11/7/2008 10:51:18 PM

GWC

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Shoot those rules dont apply to me any, Iam to far away to worry about racing in the series i just want it for fun and to mess with people. lol
I just dont want to have to mess with buying race gas and all, now if it was at every gas station it would be different.lol
i got a 500 sticker on my pod and people allready freak out when they see it run thinking its a 500..lol

< Message edited by GWC -- 11/7/2008 10:56:01 PM >

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RE: 12:1 compression h1 piston? - 11/7/2008 11:02:34 PM

TBONESGRIZZ

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quote:

ORIGINAL: GWC

Shoot those rules dont apply to me any, Iam to far away to worry about racing in the series i just want it for fun and to mess with people. lol
I just dont want to have to mess with buying race gas and all, now if it was at every gas station it would be different.lol
i got a 500 sticker on my pod and people allready freak out when they see it run thinking its a 500..lol

Haha I see how you roll Garrett! A "sleeper" bike! haha... I think 12:1 will be fine on 93 pump gas. Anything over that such as 12.2:1 or 12.6:1 and I think your gonna be pinging.

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RE: 12:1 compression h1 piston? - 11/7/2008 11:14:11 PM

GWC

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yeah its got the "sticker mod" done to it..lol

also has popo shocks on it so you can tell its lifted because of no lift brackets so i tell people its all stock..lol

i want to put a nos kit on it and hide the bottle in one of my ammo boxes lol that will get them too.

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RE: 12:1 compression h1 piston? - 11/7/2008 11:42:30 PM

TBONESGRIZZ

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quote:

ORIGINAL: GWC

yeah its got the "sticker mod" done to it..lol

also has popo shocks on it so you can tell its lifted because of no lift brackets so i tell people its all stock..lol

i want to put a nos kit on it and hide the bottle in one of my ammo boxes lol that will get them too.

If you don't want a big shot go with the Sneaky Pete NOS system... It's only like 200 bucks

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RE: 12:1 compression h1 piston? - 11/8/2008 12:12:38 AM

turbocoupe88

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just because its a 12/1 piston doesn't mean your going to have 12/1.
that's all going to depend on chamber volume and gasket volume along with deck height etc.

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RE: 12:1 compression h1 piston? - 11/8/2008 12:38:37 AM

engie

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You deal in alot of variables when it comes to "what can be compressed how much". Ambient air temp, fuel temp, a/f ratio, rpm, initial spark advance, cylinder head volume, range of the plug used, etc...

No one number will work for everything or even every condition. 12:1 will be fine in the Cat motor though! The stock spark timing isn't all that aggressive, imo...

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RE: 12:1 compression h1 piston? - 11/8/2008 1:47:20 AM

TBONESGRIZZ

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Jarrett... What's the word on the pistons? Anybody else on board? If not I may just wait it out for HotSeat. Lemme know... I got about a grand to drop in the 12:1, cam and clutching. Got some c-locks on the way too I believe

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RE: 12:1 compression h1 piston? - 11/8/2008 12:11:53 PM

engie

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quote:

ORIGINAL: TBONESGRIZZ

Jarrett... What's the word on the pistons? Anybody else on board? If not I may just wait it out for HotSeat. Lemme know... I got about a grand to drop in the 12:1, cam and clutching. Got some c-locks on the way too I believe

I have no fewer than 5 people wanting them right now...

Need to get it done! After the first of the year, I dunno how much spare time I will have to help build it. I'll have the entire month of december off...

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RE: 12:1 compression h1 piston? - 11/8/2008 12:54:31 PM

engie

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...and don't be BUYING any c-loks! I already told you what we have to do there and am working on making it happen! Going to build a prototype this week hopefully...

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RE: 12:1 compression h1 piston? - 11/8/2008 1:39:33 PM

GWC

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So then everyone thinks 12:1 will be fine with pump gas.? and thats because it might not be a full 12:1 and has a none aggresize timing profile.. sound good to me,

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RE: 12:1 compression h1 piston? - 11/8/2008 9:58:47 PM

TBONESGRIZZ

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quote:

ORIGINAL: engie

...and don't be BUYING any c-loks! I already told you what we have to do there and am working on making it happen! Going to build a prototype this week hopefully...

Well PM how much these c-locks your makin are gonna cost me!!! And also will they hold up under the RZR because I want to be able to swap them in and out. Let me know asap so this deal I got don't fall through.

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RE: 12:1 compression h1 piston? - 11/12/2008 10:40:59 PM

TBONESGRIZZ

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Bumping this post so that I don't clutter with a new one...

Anybody know if there is a 11:1 HC for the 700H1 yet? Going a different direction with the Cat and don't really need 12:1

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RE: 12:1 compression h1 piston? - 11/12/2008 10:43:58 PM

GWC

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speed werx is not going to have theres out untill next year spring or alittle earlyer maybe. have not heard of any other yet myself.

11:1 is what i want for mine.

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RE: 12:1 compression h1 piston? - 11/13/2008 8:21:57 AM

papa_slap

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I was told by speedwerx by the first of the year.

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RE: 12:1 compression h1 piston? - 11/13/2008 8:37:09 AM

GWC

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LOL to me the "first of the year" means early spring..

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RE: 12:1 compression h1 piston? - 11/13/2008 9:50:30 AM

Dreggsta

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sorry to hijack but jarrett i know your'e realy busy working on stuff but any news on the wiring to reverse override for the 700 H1???

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RE: 12:1 compression h1 piston? - 11/13/2008 8:42:30 PM

BLACKCATT

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I don't want to wait for the 700 high comp. piston, so I might get the 14:1 piston for the 650 that speedwerx has and just mix some av-gas with it. I live 10 mins. from a small airport, so I can get av-gas as easy as when I used to drag race. I will get the web cam too, and wake the ol' cat up!

Any thoughts about the 14:1 piston, or the web cam? Chime in.

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RE: 12:1 compression h1 piston? - 11/13/2008 8:59:05 PM

GWC

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14:1

i would be real interested to know if the stock bore 14:1 with a cam would make more HP then a 700cc kit with a cam (only stock compression)..???

I think maybe the 14: 1 but would it be reliable..?

what about the 670bbk with 12:1 piston and cam..?? another 29ccs is a nice amount..

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RE: 12:1 compression h1 piston? - 11/13/2008 9:21:13 PM

BLACKCATT

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quote:

ORIGINAL: GWC

14:1

i would be real interested to know if the stock bore 14:1 with a cam would make more HP then a 700cc kit with a cam (only stock compression)..???

I think maybe the 14: 1 but would it be reliable..?

what about the 670bbk with 12:1 piston and cam..?? another 29ccs is a nice amount..

IDK... maybe I should just get the stock 700 and the web cam... nah!!!! I want some serious low end power! I will not rush in to the 14:1, I will get some more info 1st!

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No more 8" lift = No more burnt boots!

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