All due respect.... your not reading..... my car is hardly with "just a SC" it has what I think is the whole menu of available mods....

 

I spoke with Brant at BR Performance Friday and he told me about the dyno results. With the M62 and a stock pulley for that blower, the car made 23psi of boost. Way too much for the stock engine. Brant is calculating the correct size for a larger pulley and Dave will make it tomorrow. Supposed to go to the dyno on Tuesday now. Yes the larger pulley will drop boost therefore decreasing heat while also reducing some drag on the engine to drive the blower. The cooler/denser air charge should add some hp as well. They are still looking for it to make around 210whp with everything properly tuned.

The car made 180whp on the dyno Friday, and Brant told me they even stopped at 5k rpms because the numbers just weren't looking stable. They've been tuning M62's on Miatas for over 6 years. Keep in mind, this system is being applied to completely stock Mini. They usually dyno around 150whp and this M62 kit is already showing a 30whp increase untuned. My next plan for this car is a catless header with a larger exhaust. That will open it up to flow even better.

Spider...sorry I missed y'all, ended up having to work yesterday. We'll get up soon, maybe after your car is finished, and have some fun!

 

Does anybody here think the Gintani Water to Air intercooler/intake manifold would work with this setup and/or be beneficial?

 

All due respect my friend. But 22psi is the limit of the factory pistons. Go above that and you have broken ringlands.

I am certain that the "62" is no where even close to as efficient as a twincharge setup with a gt2871r. So 250whp is the max for twincharge stock internals. Which would mean you need to subtract a percent of that due to increased drag on the motor from having to spin a larger supercharger.

Also if the DFIC works so well then why do the subaru people not making something like that. Because they realize how much more efficient a front mounted intercooler works. The MINI is no different.

 

That would be a question for Brant and Dave as they are the co-developers..... as long as it will fit why not..... I am not personally a big fan because of heatsoak issues as well as extra plumbing etc.....

 

HUH??? I'm a little confused here. If you can pick up horsepower from a larger pulley then why do so many vendors sell the reduction pulley?

 

They were considering using a water to air intercooler for this application, but decided to use the stock TMIC for simplicity and cost effectiveness. When properly tuned the M62 shouldn't create as much heat as the 45. I've heard water to air intercoolers aren't as effecient for track use and extended periods of hard driving.

 

Because we're talking about a completely different supercharger that moves more air with each revolution.

 

Hmmm... Are they not both Eaton roots type blowers?

 

yes indeedy...check this out http://www.automotive.eaton.com/prod...argers/M45.asp

 

The only way that you would pick up horsepower from less boost would be if the supercharger was pushed over it's limit or the intercooler couldn't keep up.

 

spider's car would be able to make more horsepower with less psi because of the more mods, at least in theory. It will be interesting to see what numbers his car makes!

 

I could see 10-15 whp higher. But not 40whp higher.

 

sorry I missed you as well...got to ride in the car and it is very nice.....

re the 45 vs 62....the reduction pulley even the stock pulley is too much for the stock engine..... on my car they will recompute and figure best size.... the great news is that you should be able to get nice gains with easy integration..... my car was nightmare to get that kind of power....search through alll the posts and miscues in the non synergistic parts....subtraction by addition...... those who have done a lot know exactly what i am talking about

 

That's awesome! I wouldn't have thought it was so much, but it's an impressive amount of boost!


Up early for a training class and just got back. Yesterday it hit 118 and today is supposed to get 115 or so. So we tried to stay outta the heat the best we can.

 

Are you serious?? I'm pretty sure a m62 maybe move more air than a m45. So the same size pulley would move more air on the m62...perhaps? Therefor a larger pulley on a m62 can theoretically produce more boost or equal to a smaller pulley on m45...I thought that you twin charged guys had all this figured out??? -- Johan

 

IAT, along with boost, determin available power (all else being the same).....

Some one posted the 62 moves 30% more air, so about at 30% oversize pulley will give same volume rates as stock, with less heating, so it would generate a bit more power than the stock set up.... Anyway, you can use that as a limit for the oversize pulley..... a 15%-20% oversize might be a good place to start.....

Have fun!

Matt

 

Speaking of oversize pulleys....

My brother works with a guy that has an alcohol tractor puller. 3000hp and 60% overdrive SC pulley(s-?). Yeah, 60%.

 

So were talking about an oversize pulley here... So I'll have to sell the M7 pullies I'll recieve here in... 4 days?

Mikey

 

Yes you will make more boost than on a M45. But you will not make more horserpower by going from stock size to oversize.

And yes I do have this figured out.

 

[I asked Dave if he considered his design to be a DIY and he said absolutely that is the goal once the front is off he can put it on in about 1 1/2 hr. [/quote]

I stumbled on to this thread and have been reading evey page for the past 1.75 hrs when I got to the above statement oh my Gawd!!! My compuscreen was covered w/sticky stuff.
I am SOLD!!!! The beauty of this kit is that you can later twin charge it if you want to get crazy.

Shoot! I can't find any towels to clean my screen off.
P.S. the sticky stuff is soda

 

Ok so if a oversize pulley on a m62 is making (for example) 18 lbs of boost, that's not more HP than a stock pulley m45???

 

we don't know yet what the size of the pulley will be for modded/free flowing engines...this is something that Brant is working out and there may be some trial and error

 

.. come on fellas they said they are working on calculating size of the reduction pulley. let's just wait til tuesday and see what's really happening

 

What are you talking about? I stated that a larger pulley on the M62 would generate less boost than the stock pulley that comes on the M62. I never said it wouldn't make less horsepower than the M42. I was stating that if they use a larger pulley than they would loose horsepower through out the entire rev range.

A larger pulley spins the supercharger slower producing less boost. A smaller pulley (the reduction pulley that everyone sells) generates more boost.