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View Full Version : "Performance" engine from Bavarian Engine Exchange?


sacramentophil
11-20-2004, 10:02 PM
Just wondering if anybody has any input on this "peformance" engine these guys offer. I'm a bit skeptical of their claims, and I've read several threads about shady customer service (but they're local to me, so maybe that'll help).
Here's what they claim:
"Performance options available for all Bavarian Upgrade engines and cylinder heads include Bavarian's proprietary, CNC machine ported and hand polished cylinder heads, Bavarian Performance street optimized cams, and precision balancing. This option increases horsepower by 20% while preserving the 5 year warranty, extended longevity, and emission specifications of our standard Bavarian Upgrade engine. These street optimized performance engines and cylinder heads are the best value in the industry for long-term street use and mild track applications. See below for more information regarding the performance upgrade option."

So a port/polish job, balancing, and cams are gonna increase HP by 20%, eh?
These M44s are what, 138 HP? So this engine is supposed to have another 27.6 HP...hmmm...

Anybody have any input?

Thanks,
Phil

ClubSport
11-20-2004, 11:28 PM
I think 10% gain is a more realistic expectation. Porting and polishing shows its greatest benefit in really high rpm motors - like 8-9krpm. At our normal engine speeds the gains from the PnP would be minimal. Most of it would come from the cams.

GDB
11-21-2004, 02:01 AM
There is a guy on here who bought one a while back and is waiting for it to show up. Do a search and you should find the thread.

sacramentophil
11-21-2004, 05:14 AM
There is a guy on here who bought one a while back and is waiting for it to show up. Do a search and you should find the thread.
yeah, I saw that...as well as a couple of threads to the same effect over at bf.c
I kinda figured that if the engine itself is actually worth the price, then I can deal with/prevent their silly little games in the customer service area.

sacramentophil
11-21-2004, 05:21 AM
I think 10% gain is a more realistic expectation. Porting and polishing shows its greatest benefit in really high rpm motors - like 8-9krpm. At our normal engine speeds the gains from the PnP would be minimal. Most of it would come from the cams.
I was thinking 20% sure sounded overly optimistic. I would think they'd show some dyno sheets or something.

Freedy
11-21-2004, 07:42 PM
I believe its POSSIBLE with all the mods they are talking about. GSR engines can gain 40 wheel hp from those mods and some engine tuning, but require an intake and exhaust to realize the full benefit. Balancing does help in the hp dept., believe it or not. You will see the most gain from the cams if they are hot enough. Ask them if that 20% is on an engine with intake and exhaust already upgraded...

TiPerformance
11-21-2004, 08:17 PM
That's not hard to believe at all, because they are going with Flywheel HP more than likely. So I would guess that that engine would actually put down around 135-142 to the wheels.

It all depends how the head is ported and polished, 5 different people could do a port and polish job and all of them get different results, some might have a substancial power gain, while others might lose power. Cams are a known way to increase power in any engine, I would say that a mild set of cams will give around 15 HP to the flywheel.

Rhys
11-21-2004, 10:34 PM
I've just had mine chipped and mapped (viper 2 chip), removes flat spot and throttle response is improved. (revs a lot quicker), and when I get a big bore throttle body put on I should see about a 20hp increase on the stock 140bhp. Nice...

GDB
11-21-2004, 10:39 PM
I've just had mine chipped and mapped (viper 2 chip), removes flat spot and throttle response is improved. (revs a lot quicker), and when I get a big bore throttle body put on I should see about a 20hp increase on the stock 140bhp. Nice...

20hp is probably expecting a bit much for a chip and bigbore TB. If you get 10hp then I'd say you're doing pretty good.

needle332rur
11-22-2004, 01:01 AM
yeah cams, P and P, and other engine works will let the engine flow better giving more power. But you guys have forgot about engine management, it's not just for race cars and Forced Inductioned engines either. But if your flowing extra air your going to need fuel too. Chips aren't going to give you enough, i dont even know if stock injectors will. Maybe in the 70's when cars were all carburated you could tune them but to get the HP's you want with engine work you will need better engine management.

_At wide open throttle and 6000 rpm the m42 flows about 189 cfm, after P and P and Cam work that number will increase. The stock computer is made to give enough gas to mix with that amount of air at full throttle. If you increase the flow you will be leaning out a little too much.

sacramentophil
11-22-2004, 01:54 AM
...to get the HP's you want with engine work you will need better engine management

Do you have any recommendations for that?

TiPerformance
11-22-2004, 02:09 AM
Ok, lets get some things straight. Depending on the amount of work done there will be different demands for the fuel system. Now everyone say " you need better engine mangement" The way I see it that you need better fuel management, if you look at 90% of the aftermarket Forced induction vehicles out on the road today, you will see that most of them do not require a computer reflash, it might help with numbers a little, but it is not necessary. With a set of mild cams and head work, I would install everything, run it on a Dyno that measures A/F ratios and see where you are at. If you are lean, my first step would be to get a raising rate FPR such as the Cartech CAR-2023, it is designed for N/A engines.

Yes, you can go with a computer reflash, but there are other ways to handle it.

sacramentophil
11-22-2004, 03:41 AM
I wouldn't have expected the stock system to be unable to keep up with these sorts of upgrades. I mean, we're not talking about FI or anything.

Although I do have a garrett t3 just laying around... :biggrin:

needle332rur
11-24-2004, 11:15 PM
i really didn't mean that it was needed, just that why spend 4K or more on a barvarian engine or 1,500 on cams and headwork and the such, but not spend a few hundred and tune the FI system. SMT6 piggy back sells for 300 +/- now if you got somthing like that and got work done then took the car to a dyno and tuned it a little you might bennefit more than you thought.

marko
05-16-2006, 09:05 PM
so does anyone know which cams are actualy available for the M44 motor??