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-   -   Camshaft. Heavy Street r53 (http://www.motoringunderground.com/forum/showthread.php?t=25969)

Thumper460 11-24-2016 05:52 PM

Camshaft. Heavy Street r53
 
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DONE !! Thumper Performance has a NEW camshaft out for the crazy Street Guys..
Got mods ?? gonna need them for this high lift big duration Camshaft!

We set about 5 years ago working on Camshafts.. ( the Heart of ANY ENGINE) Finally there is a camshaft that shows the true Specs.. no 'advertised' spec that leave you wondering... WHAT is 'advertised' !! LOL

Why 'just make a camshaft' Soooo... here are a few things to Google : Asymmetrical Cam Lobes!
Lifter Pre-loads ! rocker ratios and what they mean... ( and how to change them (?? - lol) Lobe separation Angle ( LSA)..... you are getting it all !!
Ruff idle ? want that bumpty-bumpty ? NOPE !! your tune might allow a small bit of lope, but MOST people wont know there is anything but a mild camshaft in there... untill.... LOL

Cam comes in KIT form: TPR Heavy Street Camshaft / TPR Adjusted Cam gear ( set to your spec) and lifter pre-load caps !! $625.00 for the kit !!

Thumper

Thumper460 11-30-2016 01:44 PM

Need some spec on this bad boy?? Keeping in mind this a "Heavy Street Camshaft". It is MORE Lift and duration than some other RACING CAMSHAFTS !

ALL camshafts for the MINI r53 use a "advertised Duration Numbers" The problem with that is knowing WHERE they measured from, or IF they actually measured at all, or just made up that number! LOL

Do your home work !! This camshaft has the actual numbers of: 11mm Intake lift @ Valve ! 9.7mm Exhaust Lift @ Valve !! That is .434" intake / .383" Ex. for us 'Merikans !!
Then we worked in a huge duration numbers to keep the flow going with that high lift... Intake duration @ .050" is 212* / Exhaust is 218* !!

Yep the area under 2200 rev is a bit weak... but ..after that ... Hang on !! I dont have any issues on the Street driving it in my 06 !!

Thumper


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