You also need the header, thats imperitive to get the exhaust out of the car not just though the head.
If you have a healthy bottom end you should do well.
since that dyno i have added a 17% pulley a meth kit
and a stand alone ECU oh and a Stepped race header.

 

Have you hit a dyno with your current setup?

 

nope, club lazy.
I need to get my wideband in and fix my now dying blower.
just been lazy/busy/out of the country.
I did put my full set of Vibratechnic mounts in though. so that helped a ton. and also added a new crank damper. that was a really nice addition, much smoother.
Also need to add my OS Giken Clutch and diff.
I really need to. that being said, ive had a head on the car for 3 years and probably 30ish k so far so good.

Realistically though, most people would be happy with a lower power number.
its not for everyone spending large amounts of money on the car.
The economy of scale is not there like it is for a turbo car.
But I really like the R53

 

As far as a true 250whp Mini, yes it takes a lot of work, start with the esentials, then decide if you want to or need to, chase that #:
BVH (RMW or TPR2)
Cam or Adjusted Cam Gear
Header
Injectors

As far as I/C save it till last or not at all, if you're talking about a "street" car, the stock unit works pretty well.
As far as the S/C debate, I'm of course a huge proponent of the Sprintex & will never go back to an M45, but I've told everyone that has asked, as far as stricktly a "power" mod, yes it costs you and it would have to be a personal descision as wheather it's worth it or not, but unless you have to do an S/C change or rebuild, spend the money on the above basics first, then think about it.

Do the above changes first, then look into W/M or "something else" (I'm not saying anything till I'm done experimenting), and then decide if it's enough or not. Oh, and you absolutely need an LSD if you don't have one, even with the above mods, your traction will be practicly non-exhistant without one.

As far as Mini's vs other cars, where's the fun in having something that is either, easy to make fast, or that others expect to be fast....My greatest joy is to watch peoples reactions to "a Mini?, holy crap!"
Face it anywhere close to the ratio of 1 whp to 10.8 lbs (250whp/2700lbs) is extremely respectable.

 

would love to have a 250bhp (not even rwhp) for a mini. would be happy to have a 200-210rwhp mini. would someone also can give an advice on how to achieve that? (no budget for a sprintex s/c yet)

 

200 to 210 whp is actually very attainable without cracking into the motor, should be able to reach this with a good CAI, 15 or 17% pulley, decent exhaust, 380cc injectors & a good tune (custom, not canned)
You may need a cam, to reach the top of this mark, but I've seen tuners be able to reach near or at the 200 whp mark @ tune parties with a custom tune on stock JCW cars, which are only running 13% pulleys.
(before anyone says something about the JCW head, don't forget, it's only a very mildly, exhaust side, ported head, I've seen well tuned cars w/ stock heads surpass factory tuned JCW cars)

Basiclly 210 whp, is a good # to use as a division point between needing a head or not.

 

Yeah im there. 202whp with cai, one ball, 450s, 15%, and very conservative tune. Time to go head cam and header and hope for 250.

 

CAI - most are good enough, but the JCW with its plastic enclosure may be the best overall.

Cam - RMW street cam

Pulley - 15% is safest

Header - I recommend RMW street header, great power, no codes.

Injectors - 380 - 450's

Custom tune

Should put you in the ballpark for 250 bhp

 

thanks for that. currently i have ddm cai, 17% pulley, and 380 injectors. when you guys say exhaust should it be from the headers to the muffler? i'm planning on getting the invidia exhaust or miltek exhaust if i can have a budget. unfortunately, for a tune i'm still looking for the best tuner in our country

 

^^ love this guy

 

I have 243 WHP (On a low reading dyno, on a 93 degree day with 100% humidity). And a torque curve flat as a pancake.

But it's just a number--what do you want 250 HP for? Because that's going to determine what combination of parts will be best for your application.

For me, it was RMW's BVH and header, modified twin can exhaust that won't blow my ears out, 450 injectors, and cam that gives up a little down low, with big gains up top. Did the GP intercooler too, but this car is on the track. Water/meth will be installed at some point. The car is very fast, but I can still run it comfortably around town, and more importantly, it's reliable.

There are a number of ways to skin this cat, some are less reliable quick fixes, but really, the only way IMHO to do this properly is address it as a whole, and really think it out (or like I did talk to people who know how to put it all together) rather than cobble a few parts together and pray for 250HP. How various parts work and play together are as important as the parts themselves.

 

You aren't going to get much extra power (if any) from the cat back. Pick an exhaust for the sound you like, but don't expect a big gain in power. The header is what you want to spend the money on, but for a street car there aren't many that won't set off codes. Best tune? I highly recommend RMW. Probably most experience in the industry tuning Minis. I've had my tune for over 3 years, no codes, no issues at all.

 

On the Helix 'Heartbreaker' (it reads low) we have only seen 250 whp on a handful of cars, and I have more than 1000 pulls on MINIs. No car without a BVH (or turbo/twin charged) has come close to 250, no matter what they have on it.

 

But the real question is who is the majority of parts sales that make the most power?
Though, I would like to point out, Helix makes a nice pulley and their intake sounds great....
In other new Hi Eric!