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JUN said themselves, and this is common knowledge, the larger duration cam lowers static compression hence why they put in high comp pistons. What i'm wondering is, how will the
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02-29-2012, 08:34 AM
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#1 (permalink) |
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Enthusiast Member
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JUN said themselves, and this is common knowledge, the larger duration cam lowers static compression hence why they put in high comp pistons. What i'm wondering is, how will the motor react power wise with just the cam swap and stock pistons.
To be honest with you guys, for a measly 10~15whp, its not worth ripping apart the motor to swap cams and then retune. The price per hp ratio kinda sucks. If, I was rebuilding a block and had it apart already, then maybe I would swap the cam in. |
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02-29-2012, 09:42 AM
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#2 (permalink) |
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A True Z Fanatic
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Installing these cams will require you to remove the entire timing chain cover and a slew of other stuff. Probably better to do this mod if your already building the motor. The lowered compression could go well w/ FI. I mite look into using these when I build my motor but I'll wait for more info before pulling the trigger.
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02-29-2012, 09:50 AM
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#3 (permalink) |
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A True Z Fanatic
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Probably looking at a good $1000 just to install. But if it makes a big difference I would be willing to fork over the money.
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02-29-2012, 10:35 AM
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#5 (permalink) | |
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Quote:
 Very interesting. In theory, if these lower the compression ratio then one could run more boost and make more power without needing to build the block, no? Or is it more of a certain level of power make the engine go boom kinda thing?Then again, as stated before, if you're ripping apart the top of the motor you might as well build the whole thing. |
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02-29-2012, 02:27 PM
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#6 (permalink) |
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Static compression is lowered yes, but the added compression from burning the air/fuel mixture(timing advance) is actually greater, hence why adding larger cams makes power.... usually.
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02-29-2012, 02:54 PM
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A True Z Fanatic
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This is very interesting, it'll be cool to see what kind of gains and drivability changes these cams could yield.
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02-29-2012, 07:11 PM
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#9 (permalink) |
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A True Z Fanatic
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So who wants to buy it and ship them to me?
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03-01-2012, 07:36 AM
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#11 (permalink) |
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Track Member
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Is anyone trying to unlock tuning the VVEL?
theDreamer has a post halfway down the page that touches on this matter. |
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03-01-2012, 07:59 AM
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A True Z Fanatic
 
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Quote:
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03-01-2012, 08:13 AM
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#13 (permalink) |
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Track Member
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Well I just asked JUN if, all power gains aside, these would be ok to run on a stock motor or if the additional modifications they made would be necessary (primarily the fuel injectors and the ECU). Hopefully they get back to me soon.
But it is 11PM over there right now, so I may have to wait a bit. lol Last edited by The Dimer; 03-01-2012 at 08:18 AM. |
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03-01-2012, 09:22 AM
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#14 (permalink) |
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A True Z Fanatic
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I will shoot another email to Uprev and see what they say.
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03-01-2012, 09:42 AM
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#15 (permalink) |
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can the JUN cams be used with exhaust camgears? Jim Wolf Technology website
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