Cam for justacooper
You might want to contact Scott at TSW ([email protected]) but I can give you my 2 cents worth. We put a Thumper head in Scott's justacooper along with a Crower NS2 CAM and his MINI literally screams now. More power and torque over the entire RPM range with no dips - it just keeps going with mo perceptable dips or flat spots in the torque. And his Cooper has not yet been tuned with the new head and cam! This justacooper runs like a scalded cat.
Regards,
[email protected]
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goaljnky New Member
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cost..
Just me......................................
Thumper -
Just did some searching
For cooper cams
RMW, Werkin, Mini Mania, Shrick, Kent and CatCams. Not all manufacturers support distinct cams from Coopers, but use the same cam for both the S and the Cooper. Also, some of the companies offer some really, really radical cam profiles! Do your homework before you buy....
Matt -
N2MINI MINI of the Month
At what point ( HP wise ) would we COOPER people need to worry about the tranny??
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I suggest that if you want more power.... do it! Just keep in mind you dont have a forgiving trans, and drive it accordingly. Look at Scott at Texas Werks.. he is racing his!! ( Head /Cam upgrade)
ALL the interest has been on the r53.... but not any longer!! The r50's are now coming into some powerful combos, even though they have "weak" trans and no s/c whine!! LOL
Just me...............................
Thumper -
Oh, but i do agree, the R50 really responds well to a head and cam swap. Scott's car is a real joy to drive! You never wonder where the money went. -
COOL!! Duh, I am sorry .. that must be what the ASSUME comes in!! LOL
Just me .... (in error.)
Thumper -
goaljnky New Member
Well, I did a bit of research when my clutch went. Later model R50 came with a 5 speed Getrag which was rated for engines up to 182 ft/lbs of torque. So at least the 05+ R50/R52 should be able to handle quiet a few upgrades. At least on paper.
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lotsie Club Coordinator
I'm not talking about my 03 Midlands, best let sleeping dogs lie, as it were:smilewinkgrin:.
Mark -
To get the most out of an NS1 cam and the NA Cooper motor, an ENDYN modified head with larger valves optimized for the application, is the ultimate reliable approach.
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N2MINI MINI of the Month
That's better news atleast.. ( maybe ) Be hard for me to come up with an extra 70 ft/lbs.. Wonder how much more a decent head/cam combo would put out.. Header would help with that but don't really want it to be any louder since it's my daily driver..
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I should think the Ported Head and the stock valve size will keep if not increase the street manners, and then the NS1 camshaft will just pull it all together. Remembering that the EFI engine is a totally different induction, and sometimes the smaller will allow more power and TORQUE... but either way, there are NOW SOME Power builders for the r50's!!
Just me................................
Thumper -
A ported head does not increase the noise level from the tailpipe. Larger valves in a ported head will not be deleterious to street manners. The only advantage to keeping the stock size valves in an ENDYN ported head is to reduce cost. Economics is a valid reason to base a head’s configuration decision upon, but if desire for gains is the major concern driving the process, stock size valves leave some power on the table. Thumper460 admits he has limitations when it comes to making “power†with larger than stock valves in a normally aspirated application, that’s his problem.
As for expected gains, every car is different. Tolerance stacking can work for or against you, if the original head has core shift and other drawbacks, a ported head will have greater potential. If OE stacking is in your favor, gains will be less pronounced.
The stock header isn’t a major bottleneck, the 1.6ltr Cooper NA motor can only flow so much and stock primary tube diameter is adequate. Yes it can be improved on, but it’s a high dollar per gain ratio if purchasing aftermarket, and excessive tube diameter can kill flow at low rpm. The OEM header flange ports will need to be opened some to avoid creating a barrier when matched to ported head’s exhaust ports, however it will only require time with a grinder and hand files. -
Just me....................................
Thumper -
And on some completely different subject...
I was wondering why there were so many dual purpose cams (including stock) sold for both the R50 and the R53 when the required profiles for unboosted and boosted engines is normally very different... So I did some digging.
It's true that if you want the highest HP from a N/A motor, and boosted engine, you use very, very different profiles. Boosted engines have different response to lobe overlap (if overlap is very high, that is good for high RPM high HP N/A engines, you can "blow through" the head and loose all your charge out the exhaust pipe on boosted engines) than NA motors. So why are the same cams sold to the same app?
Turns out this is a duty cycle issue. Most of the time, the car isn't on boost. At light throttle, even at higher RPM, the bypass valve is open. So for a street driven car, for most of the time, the car IS unboosted. So for most of the time, optimizing a cam for a boosted application will degrade power and torque during most of the use cases.
What this really means is that cams for street cars leave some peak power on the table to keep the car driveable. This is why the same cam can be sold to both the N/A and the SCed (or turbo'ed) car to good effect.
Now if you're a drag racer who doesn't do street driving, then getting a custom ground or "race only" cam for our cars MIGHT make some sense.
Matt
ps, like most things, it's a bit (a lot?) more complicated than this. But this covers the general idea... -
The reason the MINI cam works for dual applications is its good balance of overlap and lobe separation; just enough minor overlap to help with cylinder filling at atmospheric pressures in the Cooper, and adequate lobe separation to prevent loss of charge while under boost. The Eaton doesn’t create enough boost to be a factor with the mild overlap. I think people are confused about why special cams are required on high boost turbocharged motors and yet our supercharged motor works well on a stock type cam profile, in fact low boost turbocharged motors work well on the same type of cam. For high boost (high rpm) turbocharged engines, backpressure created by the turbo can exceed inlet pressure and encourage hot gases to flow in reverse. For that application, next to no overlap would be allowed.
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:crazy:
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N2MINI MINI of the Month
Thanks guys for the input. Nice to know I don't really need a header if keeping it mainly a street car, and that my tranny will MOST likely hold up if I don't go crazy with HP..
Cam and a retune ( tuned now to 113 Hp & Ft/lbs ) would probably be all I'd do money wise as that would be about half the cost of a head +- etc etc... -
Most cams are not pressurized (boosted)engine specific. That is to say that we do not go around on boost all of the time. On average your daily driven MINI may utilize upper boost levels 25% or less of your total driving time. So to have a cam that is specifically designed for boosted levels would in most cases lower the performance reliability and economy levels of the engine. For the track only engines there are advantages to a "supercharged" specific cam. However at present those specifictrack cams are not being manufactured because of the other valve train parts that will be required for their usage.
So if you have a Cooper any of the current cams available for the MCS will work fine. Naturally *I recommend the CROWER NS cams. :lol:
*contact MA approved vendors for information on camshaft recommendation.
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