znod

The red line on a 545i is 6.5K. And HP is not proportional to RPM. The 545i hits max HP of 325 at 6.1K RPM. Max torgue is better across the whole RPM range. I don't understand what you said about torque.

znod

Yes, I am waiting for Dinan to say you'll get 17 (RW)HP only if you also have its exhaust and throttle body. Dynoing would be a great idea, but doing so is expensive in Phoenix--maybe $500, but I am not positive. Maybe $500 is for a dyno tune. What do you think dynoing should cost? Apparently, Z06's truely yield about that much RWHP from a CAI--per dynos. But, the 545i? Well, maybe. I'll bet Dinan would not take the intake back if you don't get close to 17 RWHP on a dyno.

znod

I don't know what the Dinan point values are all about. I was saying that there are 10 labor units per hour, as I recall, and that the cost of one hour is $115. That sounds about right since the throttle body is 8 labor units, and (8/10)X$115 = $92--which is what I paid to have my throttle body installed.

Dinan's price, including labor, actually isn't too bad if you get close to the 17 RWHP. The cost per flywheel HP would be about {[(.9($999)) + (3 X $115)] - ($500 - $345)} / (17 / .85)}} = ($1,244 - $155) / 21 = $1,089 / 21 = $52--which is not too bad considering the comparable values in the first "Mind Candy" thread in my sig. In this calculation, .9 allows for a 10% Dinan certified dealer discount, and ($500 - $345) is the intakes "salvage" value less unintallation/reinstallation cost. I'll post my results and then correct any errors I find.

Don Juan

Does anyone k now if the airbox of the 545 is the same of a 550? the filter seems the same

znod

Dinan does not yet indicate that its airbox will fit the 550i. To sell more units, I would think that Dinan would have so indicated if the airboxes were identical. Thus, I suspect they are not identical.

ipse dixit

Yes, I am waiting for Dinan to say you'll get 17 (RW)HP only if you also have its exhaust and throttle body. Dynoing would be a great idea, but doing so is expensive in Phoenix--maybe $500, but I am not positive. Maybe $500 is for a dyno tune. What do you think dynoing should cost? Apparently, Z06's truely yield about that much RWHP from a CAI--per dynos. But, the 545i? Well, maybe. I'll bet Dinan would not take the intake back if you don't get close to 17 RWHP on a dyno.
[/quote]

On the Z06 - I believe it. One of the true advantages of a good ol' American pushrod V8 engine. None of this fancy-smancy OHC and Valvetronics ...

znod

On the Z06 - I believe it. One of the true advantages of a good ol' American pushrod V8 engine. None of this fancy-smancy OHC and Valvetronics ...
[/quote]
Good point. Manana ipse d.

merklebob

vnod

look at the hp curve in the info section you'll the hp drops off the table at 61-6200 which indicate a fuel map shut off at that rpm. red line is different and i'm sorry i miss lead that issue.

for the best effect the torque from 4000 on should be flat or good down slightly [perfect world hard to acheive].

znod

I didn't look back, but I'd be surprised, regardless of what the table shows, if there is a fuel map shut down at that point. The Step does start shifting somewhere around that point--aways looks like about 6.2K to me. But, it doesn't stop shifiting until a higher RPM. And, the "real" redline shown on the speedo indicates 6.5K. Unless the HP dropoff is huge, a fuel shutoff would not be indicated. If HP simply decreases, then the implication is that max HP has been reached--which is consistent with the max of 325 HP at 6.1K I mentioned above.

On torque, the best effect would be to have max all the way across the RPM band. Given that this scenario never plays out, the next best would be for torque to start high and never decrease. This scenario never plays out either. So, we are left with what you indicate is optimal--since your scenario is pretty much the best that could be hoped for.

I'd like to look at the table. I tried, but was unable to find it quickly. Could you direct me to it by giving more detail. Thanks much.

EuroCarFan

If you look at the last paragraph in their description, it says "The high flow intake system alone produces a substantial 17 horsepower gain..." I also don't believe these are RWHP gains but they're peak hp gains at the crank.