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Discussion Starter #1
To All,
As a new member I would like to ask the following question:
What Three performance modifications would make the most cost effective difference to a stock M5 E39?
I see that many different mods have been carried out to different cars and would like to benefit from other members spend history.
Best Regards
Peter.
 

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Depends on your definition of cost effective.

IMO, I dont know of any mod that is inexpensive ($/bhp). If you are looking for best bang for the buck, I would offer the following for your consideration:

headers/exhaust
powerchip software
3.45 rear gears

good luck

al
 

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M500PMW said:
To All,
As a new member I would like to ask the following question:
What Three performance modifications would make the most cost effective difference to a stock M5 E39?
I see that many different mods have been carried out to different cars and would like to benefit from other members spend history.
Best Regards
Peter.
See this recent thread for the answers to your question: http://www.m5board.com/vbulletin/showthread.php?t=49231
 

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Peter:

Depending on what you want to do.

Pure HP:

Headers.
PowerChip.
Exhaust.

Handling:
Rear Sway Bar

Thats all I have for now.
 
B

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Welcome to the messageboard.

On the low-cost side, here is what I would recommend:

- UFMotorsport IATS
- TC Design Rear Sway Bar Brackets
- UUC EVO3 Short Shifter with DSSR

On the more expensive side of things:

- Exhaust
- Headers
- 3.45 Differential

Cheers, Daniel.
 

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Discussion Starter #7
Thanks everybody for your fast responses. I will look at each one very carefully and act accordingly.

Great site, keep up the good work!
Best Regards
Peter.;)
 

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M500PMW said:
Thanks everybody for your fast responses. I will look at each one very carefully and act accordingly.

Great site, keep up the good work!
Best Regards
Peter.;)
peter:

I watched this thread expecting more comments.

The single greatest performance mofdification you can make has to be SuperSprint headers, however it is not the least expensive modification.

Another significant modification would be the clutch. The OEM clutch does not lend itself well to spirited driving. Whereas a clutch assembly such as the UUC system offers a significant improvement, I would argue that it should have been considered by BMW. In addtion it will offer a crisper throttle response particularly the feel between shifts. This upgrade much as is the case with headers is not the least expensive modification either.

The IAT relocation kit is certainly a nice addition however where you live it may not afford the same benefit that others receive in more adverse (heat) conditions. This modification has a low cost of admission and can installed easily.

The rear sway bar brackets have been know to break from time to time. Many drive forever with no concerns so if piece of mind has a value then this modification is for you and again the price of admission is very low.

The UUC short shifter changes the feel of the car, for most they enjoy it and it will afford a much more positive shift feel. the cost for this begins to approach the middle mark as for as cost of modification go.

Then there are big brake kits, cold air intakes, trim pieces, etc....... if you can dream it, it probably remains at your disposal.

If you have not already done so I would like to invite you to look at our web site for other ideas www.Discovery-Automotive.com , who knows there maybe a Supercharger in your future.......if it is not already your first consideration.

Regardless, we will gladly any any questions you may have and then assist you with any product and or service desires you have.

Take care.

Shadowman
 

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Fart said:
Are you saying that IATS works for those in hot conditions, so for me in Iceland (avarage temps around 10°c) its -10°C now, it wont be as effective.

What about Powerchip, do you need to modify your intakes and exhaust to get improvements, and is it hard to install?
The IAT will provide the greatest improvement in those warm, humid, to extremly warm areas.........

As for the PowerChip DME tuning this is something that will bring an improvement to all, and it is an easy process to under take.

Shadowman
 

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My top three would go something like this:

-Rear sway bar with TC brackets.
-Short shifter
-Exhaust system (mufflers)

Like I tell everyone who asks a question similar to this, it's really about what you want to do with the car. I think the listed items will enhance the driving experience by a large amount. A majority of the items listed can be found at our website, www.beastpower.com.

Hope this helps, and don't hesistate to ask any other questions.

Travis
 

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Discussion Starter #12
Thanks again for the additional infromation.

My attack will be as follows:
I have already ordered AC Schnitzer front and rear sway bar kit.
Next in line will be modified sway bar brackets as I have already had one break.
I will also be ordering IATS relocation kit and Evo 3 short shift kit.
Front brake ducts are already in my posession ready for fitment however I still have to order the modified front grille from BMW this week to complete the install. While under there I am considering fitting my own cold air feed from brake ducting feeds. Is this a valid modification or should I purchase a dedicated cold air feed kit??
Thanks again
Regards
Peter :byee55amg
 

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M500PMW said:
Thanks again for the additional infromation.

My attack will be as follows:
I have already ordered AC Schnitzer front and rear sway bar kit.
Next in line will be modified sway bar brackets as I have already had one break.
I will also be ordering IATS relocation kit and Evo 3 short shift kit.
Front brake ducts are already in my posession ready for fitment however I still have to order the modified front grille from BMW this week to complete the install. While under there I am considering fitting my own cold air feed from brake ducting feeds. Is this a valid modification or should I purchase a dedicated cold air feed kit??
Thanks again
Regards
Peter :byee55amg
Hey Peter - It sounds like you're well on your way to beast blissfulness. The IATS will only help in warm climates by prevently overly-retarded ignition timing under heat soak conditions. So if you're not in a hot climate, it's not really needed. But then again, it's so cheap (relatively), that it wouldn't hurt, either.

Automotive Specialist (TCM on the board) makes some strong and sanity-priced brackets.

Beware of intake mods, the ECU is EXTREMELY sensitive to changes there, so you could end up with the dreaded SES light. And the problem with aftermarket solutions is they're ridiculously overpriced, IMO ouich

I have a way to do CAI that's nearly free if you're interested.


:cheers:
 

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Discussion Starter #15
Hey,

Thanks 'Elevens' for the constructive nature of you thread.
I would be most interested in your IATS mod, especially as I am technically minded myself.
With regard to the sway bar brackets, where exactly can I find them???
Thanks for your help once again.
Best Regards
Peter
 

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Discussion Starter #16
Sorry Fella,

Thought that I got something wrong! Didn't mean IATS..... Try CAI instead.
Cheers.
 

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M500PMW said:
Hey,

Thanks 'Elevens' for the constructive nature of you thread.
I would be most interested in your IATS mod, especially as I am technically minded myself.
With regard to the sway bar brackets, where exactly can I find them???
Thanks for your help once again.
Best Regards
Peter
Peter,

Go here for Automotive Specialist . You could also PM board member "TCM", I think it's his dad. I spoke to the gentleman on the phone a couple of times. He's a straight-shooting goldmine of information. Very laid-back and most willing to help. He told me he makes these swaybar brackets by hand, one-by-one, and said he probably has more labor in them than what he charges, but does it to "fill in" the unbooked slow times. Last I heard, they were under $100. Beastpower also makes some very pretty - but pricey - brackets. Another approach would be to contact Dinan and see if they will sell the bracket "reinforcement" solution that they ship with their rear swaybar.

Once I gather the pics, I'll post the DIY on the CAI for nothin' (...and chicks for free ) :hihi:
 

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DIY CAI

Everything from the airboxes to the motor remain untouched. Basically I'm just copying what Dinan has done with their CAI, that is, drawing cold air from the void space on each side between the front inner fender and the fog lights.

First, I opened up the fog lights. Here's two approaches I've used, this one cost me nothing but wear and tear on my drill:


This next one cost me about $10 for screening, and is what I am currently using. First, cut out your existing foglight bezels:


Then epoxy the screen to the backside:


Finished, it looks like this on the car:


Next, you could buy $2000 worth of carbon fiber tubing, or use what's under the hood that we've bought and paid for already. We have one on each side, and they look like this:



At first, I tried to cut and paste things together for a true RAM-AIR system, but the SES light didn't like my approach:



So what I ended up doing is using the shortened stock intake tubes, cutting the mounting tabs off, and pointing them downward into the mostly empty cavity behind the foglights. They stay attached using the factory clamps at the air box. Don't worry too much about cutting up the parts, they're only $35 retail:


There you have it. The cheapskate's approach to M5 CAI. I haven't dyno'd it, and I don't know that it's not impossible to get water into the air box. My guess is that the point of entry is maybe 2-3" lower than the stock location, which is directly behind where the license plate would go. SES light has been gone for months. Use at your own risk!

:byee55amg
 
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