engine and drivetrain How Much Hp From My Bmw 2002?

[opprimer]

Hallo guys.
I have bought a BMW 2002 about a year ago,but it isnt running 100% perfect. It is producing 146hp on the engine at 5575 rpm, and 126 at the wheels. My question is therefore, with my 316* Shrick camshaft, shouldnt it produce the max horespower, at more rpm's than 5575 and shouldnt my engine be able do produce more horespower, than it actually is? I am going to have a guy trying to adjust the Webers on my car when it comes out of my garage again next year, and he means that it should be near 180-190 hp with my setup?
The setup is: 
316* Shrick Camshaft.
2*45mm Weber DCOE
Huco electric fuel pump.
2" sport  exhaust.
Dbilas intake.
Electronic Luminition ignition.
Ti cylinder head.

Cheers Frederik Jensen

[TobyB]

 

2" sport  exhaust.

with what header?

What ignition?

 

If your head is stock and unported,

that head/exhaust combination is probably your limit.

 

You could probably find a few HP in tuning the carbs and timing,

but not 30!

 

hth

 

t

[opprimer]

Hmmm, i am not exactly sure about what header it is, but it is for sure not stock, mabye its homemade? Each of the four pipes is 1,85 inch thick (3,7 cm).

The ignition is an electronic Luminition ignition with is said to be accurate to over 10.000 rpm's.

[tim385]

What compression ratio pistons?That is another limiting factor as well.

[Arizona02]

 Korman Autoworks in USA has engine  specs with 316 cam

 

 

http://www.kormanautoworks.com/2002.htm

[AceAndrew]

and he means that it should be near 180-190 hp with my setup?

 

 

Are you talking race-gas, hi-comp pistons, lots o porting (regardless of headtype), and some larger venturis on that weber (making for higher hp but less easy to tune)?  

 

I'm assuming this is a race car, if not ..... well good luck with that.

[TobyB]

Your tailpipe is too small, certainly, if the primaries are 1 7/8. 

 

Your primaries MIGHT be too big, too, especially if your peak power's that low.

 

Oh, also, as Andrew asks, what venturis in the carbs?

 

t

[opprimer]

Hallo again guys.

The problem is, that i havent build the engine myself, so i therefor dont know exactly what is inside the carburators.
I think/hope that the venturis is about 36, but i really dont know?
I will try to call the guy who build the eninge towmorrow  and ask him what is inside. The engine was build by a professional racedrive for track use, but i am not going to use it on the track.

The 316* camshaft might be to aggresive for street use, but the car actually have no problem by standing idle (is that what you call it? )
So i am a bit exited to hear, if it actually is a 316 camshaft that is in the engine.

I know that it is Ti pistons and the compression is 10/1. 

[FB73tii]

Frederik, you are not going to make 180 HP at the wheels with only 10:1 compression on pump gas and 36mm venturis. I recently dynoed my new race engine at 180 HP at the wheels with my Schrick 316 cam build. This was on a dynojet--all disclaimers regarding HP figures from a dyno run apply:

 

M10 2.0L

Schrick 316° cam

+1mm valves with 30° backcut

Multi-angle race valve job

KM Cams forged steel rocker arms

Dual race springs with titanium retainers

Mildly ported intake and exhaust, polished combustion chambers and exhaust ports

Forged 11.3:1 compression pistons

144mm rods

100 octane race gas

Weber DCOE 45's with 40mm venturis

IE step header, 1 5/8" to 1 3/4" primary, 3" secondary

Electromotive HPV-1 crank fire direct ignition (wasted spark)

peak power 180 HP @ 7800 RPM, peak torque 146 lb-ft @ 5500 RPM

 

BTW, where do your crankshaft dyno figures come from? Did you dyno on an engine dyno before installing? Have considered this for my next engine, but that is a lot of extra work. I generally figure 17% drivetrain loss, though have seen 15% quoted. Your numbers come out to 13.7% drivetrain loss.

 

As another data point, my '73 2002tii engine made 126 HP at the wheels on a dynojet  at HMS Motorsport in 1997. All it had was 9.5:1 pistons and a Norris model 301 cam (similar to a Schrick 285). This is with a stock distributor, tii exhaust manifold and stock exhaust. I estimated flywheel power at roughly 150 HP, which is 20 HP above stock tii 130 HP. The numbers were: 126 HP @ 6300 RPM; 116 lb-ft @ 4400 RPM. I have been driving with this engine combination for the past 17 years, using 6800-7000 RPM as the redline. The car performed a lot better on track after I added a full cage, got the weight down to 2000 lb, and put in a 4.45:1 rear end. Now the '69 has the new 316 cam engine and also weighs about 2000 lb, full cage, though not as modified as the tii.

 

Best, Fred (Fredric) w/ '69 (316 Schrick) and '74tii (being upgraded to 336 Schrick and SEFI)

Edited October 27, 2013 by FB73tii

[TobyB]

Look at Fred's list, and compare it to yours-

 

I think exhaust is #1 problem, followed by compression, and probably

then a re- tuning.

 

But again, for the street, I think you can equal (or maybe better) his torque,

give up 20+hp, and be happy.

 

t

[opprimer]

Thank you so much guys, i really appreciate  your help!
The "problem" of all this is, that i have not build the engine myself, and i therefor actually dont know what is inside.
I am going to call the guy who build it tomorrow, because i think that i have found out, that it actually isnt a 316 cam that is in the engine right now. So tomorrow i am going to find out what it really is thats inside the motor.

The car is only for street use, and i am therefore quite happy that it isnt the 316 camshaft that is in the car, it might have been a bit to much.

I will keep you updated tomorrow and tell you whats in the ingine.

[opprimer]

My car produces just around 160 ft lbs.

[opprimer]

Okay, i have been talking to the man who actually build my engine today, at rather suprisingl, i found out that it is a completely stock 284 camshaft that is in the eninge. The reason for this is quite tricky, but to make a long story short, he used the camshaft in desperation because he couldn't get the car running smoothly at low rpm's with that 316 camshaft (what a suprise?? )
But, is it just me or is 150 hp quite good for an engine with a 100% stock camshaft?

 

[FB73tii]

-deleted dual post--

Edited October 28, 2013 by FB73tii

[FB73tii]

A stock M10 engine with 10:1 pistons and 45 DCOE's with 126 HP at the wheels is pretty damn good. Do you have the dyno sheet to prove it? And as I asked in my first post--where do your crankshaft dyno figures come from? Was the engine dynoed on an engine dyno before installing?

 

If you actually have 10:1 pistons, an upgrade to a Schrick 292 or 300° motorsport cam will really wake that engine up, assuming a little porting is done at the same time.

 

 The engine was build by a professional racedrive for track use, but i am not going to use it on the track.

 

Something about your story really does not add up. A mechanic who builds race engines would not put in a 316 for street use (unless it was me ), and would know that it would not idle well at low RPM. They would also use at least 11:1 pistons to make use of the cam. One does not go from a 316 cam all the way down to stock and not say anything to the buyer--that is just nuts. Finally, the valve springs for a 316 cam would be much too stiff for a stock cam.

 

I know from previous experience that what people say (or believe if that is what they were told) is not always what is true. The "180 HP race engine" in the 2002 I bought last year turned out to be a mostly stock 1.6L engine, with 10:0 pistons and a Norris 301 cam. It was way overcarbed with 45DCOEs and a bad fuel pump. No wonder it ran like crap and made no power--if lucky it made 100 HP at the crank. $5K later and I have a real 180HP engine (see post above). NOTE: $5K is with me doing all the work except for machine shop services, which I get a good rate on. It also does not include the carbs, which I already had.

 

--Fred

Edited October 28, 2013 by FB73tii