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 Post subject: Re: lux engine specs/differences
PostPosted: Sun Jan 11, 2009 9:51 pm 
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165?? cant beleive any car co would put out an engine right on its max head flow , worse for economy surely?

have you looked into aftermarket cam?


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 Post subject: Re: lux engine specs/differences
PostPosted: Sun Jan 11, 2009 10:24 pm 
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J.J. wrote:
:lol: True. Red is the fastest :)


i'll second that

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 Post subject: Re: lux engine specs/differences
PostPosted: Mon Jan 12, 2009 9:08 pm 
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If your doing research this guy developed modern asymetric cams for the 944 & also messed with throttle bodies.
http://www.jmengines.com/index.htm
Rick Cannells website is still only partly working but is still a good resourse.http://www.cannell.co.uk/
Lindsey racing. http://www.lindseyracing.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=LR&Category_Code=944

If you notice the 2.7 is rated at the same power as the 2.5. (But more torque.) Why? Because the head is the limiting factor. They then went on to develop the 16v to get around this. But they didn't understand the importance of gas speed at the time. The twin cam S is the most under-rated 944 & the easiest to tune. Then with the S2 they got it right!
You can tune the lux with modern tech'. But it's expensive. Exhaust, then head & fueling/intake. Theres a guy in the states selling the 2.5 rated at 200hp but it would be cheaper to buy a turbo or fit a super charger! My head is stock but I have a better exhaust & modernised fuel pressure reg & damper. Engine rebuilt & fresh. Result full oem power. But more torque! Won't get the horses without a tuned head & thats expensive. Next stage a remap & then I will see were it is now. At last check was 28hp up on when I got it. It can do 35mpg so don't think economy is a problem! :)

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 Post subject: Re: lux engine specs/differences
PostPosted: Mon Jan 12, 2009 9:59 pm 
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J.J. wrote:
If your doing research this guy developed modern asymetric cams for the 944 & also messed with throttle bodies.
http://www.jmengines.com/index.htm
Rick Cannells website is still only partly working but is still a good resourse.http://www.cannell.co.uk/
Lindsey racing. http://www.lindseyracing.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=LR&Category_Code=944

If you notice the 2.7 is rated at the same power as the 2.5. (But more torque.) Why? Because the head is the limiting factor. They then went on to develop the 16v to get around this. But they didn't understand the importance of gas speed at the time. The twin cam S is the most under-rated 944 & the easiest to tune. Then with the S2 they got it right!
You can tune the lux with modern tech'. But it's expensive. Exhaust, then head & fueling/intake. Theres a guy in the states selling the 2.5 rated at 200hp but it would be cheaper to buy a turbo or fit a super charger! My head is stock but I have a better exhaust & modernised fuel pressure reg & damper. Engine rebuilt & fresh. Result full oem power. But more torque! Won't get the horses without a tuned head & thats expensive. Next stage a remap & then I will see were it is now. At last check was 28hp up on when I got it. It can do 35mpg so don't think economy is a problem! :)

but the 2.7 head is a very different beast to the 2.5, bigger valves for a start. That's one of the reasons why the Turbo guys use the 2.7 head on the 3 litre block to build big big motors.

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 Post subject: Re: lux engine specs/differences
PostPosted: Mon Jan 12, 2009 10:29 pm 
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head and flow technology wasnt shit at the time though lol 80's gave us some of the most solid and over engineered engines ever ! so if the 2.5 head is maxed out at 165 then porsche employed the wrong engineers lol . re lindsay racing , im sure theyre great ..... its just my ignorance wont let me listen to americans when it comes to tuning cars lol buses maybe but not cars :lol:

headwork doesnt need to be expensive , an engine is an engine so someone who knows what theyre doing and doesnt double the price because of the badge shouldnt charge you more than they would for any 8v :) . it'll be a while but when mines done i'll post power figures and cost and the number of who did it for anyone interested in having headwork done :)

as a rough estimate , a stg3 big valve was 500 :)


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 Post subject: Re: lux engine specs/differences
PostPosted: Tue Jan 13, 2009 6:07 pm 
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Have used http://www.cncheads.co.uk/index.html in the past. But the stock head is good to start with. Ports are short & look good. £500 buys a big valve head from Lindsey racing. So should be enough. Not everyone likes Lindsey racing. But all I can say is the few modified parts I've got from them have worked on the dyno & were very good quality. I don't have one of there heads though. Good luck to you 944. Would be interested in the results. If you can weld your own bodies & exhaust manifold then yoiu should get good results. I can't & have to buy these. Result. Lots of money for 200 hp when a similar amount would give me 300 with supercharger.

Was aware the 2.7 has bigger valves. But are the ports different Jim? Havn't seen one of these as they are pretty rare! Never seen any flow data for them either. But the 2.7 should make more power than it actually does.

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Audi 2.0 TDI Good but rather boring..........
944 now sold.


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 Post subject: Re: lux engine specs/differences
PostPosted: Wed Jan 14, 2009 6:23 pm 
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Here's some info

Image

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 Post subject: Re: lux engine specs/differences
PostPosted: Wed Jan 14, 2009 8:55 pm 
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Catamax944 - there's some interesting info in your post - where did you get that info from? Steve


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 Post subject: Re: lux engine specs/differences
PostPosted: Wed Jan 14, 2009 10:52 pm 
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180cfm converts to 107.5cfm at 10" of water air pressure. (Approx)

For stock unleaded CFM (10" pressure) X No of cylinders X 0.43 = BHP (The .43 is an average coefficient cfm to HP)

So thats 180? X 4 X 0.43 = 185

I've used these formulas before & found them somewhere near but not on this engine. This is power potential for the engine assuming good inlet fuelling & exhaust. My memory fouled up! Sorry. The head dictates the ultimate power of the engine. So assuming the head is left stock. Improving other things should yield a maximum of another 20hp. This is a guide figure to aim at. Calculations like this can never be totally accurate. But it's fun.
Source of formula. Rick Woods Racing,(CNC heads.)

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944 lux, Eco car. Off the road more than it's on!
Audi 2.0 TDI Good but rather boring..........
944 now sold.


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 Post subject: Re: lux engine specs/differences
PostPosted: Thu Jan 15, 2009 12:51 am 
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sdelasal wrote:
Catamax944 - there's some interesting info in your post - where did you get that info from? Steve


I found it on some french site,they actually expect you to pay for this crap but i managed to get around that and made a copy.

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 Post subject: Re: lux engine specs/differences
PostPosted: Thu Jan 15, 2009 9:28 pm 
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cat, cheers :)

j.j , ive never took anything american tuners say as the end of the line , i just dont think they can be as good with european/jap cars as the people that know them best ... europeans and japs :)

i havent even thought about the exhaust manifold yet , want it running first then i can see how it drives and get a power graph. i'll have a read and freshen up on exhaust design nonsense and sort something to get what i feel the car needs. ive got the knowledge and experience to make the inlet etc up but not got a tig :( so i'll have to get the welding done or borrow a machine. with new fuelling / headwork / cam / 3d coilpack ignition and full exhaust id like 195-200 bhp then 50 or 75 nitrous.

im going to get it rollered with just the bodies , exhaust and ignition to see how much power 300 quid gets me first :D


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 Post subject: Re: lux engine specs/differences
PostPosted: Thu Jan 15, 2009 11:21 pm 
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944 wrote:
cat, cheers :)

j.j , ive never took anything american tuners say as the end of the line , i just dont think they can be as good with european/jap cars as the people that know them best ... europeans and japs :)

i havent even thought about the exhaust manifold yet , want it running first then i can see how it drives and get a power graph. i'll have a read and freshen up on exhaust design nonsense and sort something to get what i feel the car needs. ive got the knowledge and experience to make the inlet etc up but not got a tig :( so i'll have to get the welding done or borrow a machine. with new fuelling / headwork / cam / 3d coilpack ignition and full exhaust id like 195-200 bhp then 50 or 75 nitrous.

im going to get it rollered with just the bodies , exhaust and ignition to see how much power 300 quid gets me first :D



Hi :)

Why not just forget the head/cam/manifold work and go straight to 100 or 150 hp of Nitrous, which would cost you roughly £700....and around 2 to 3 hours of your time...

All the best Brett :)

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-UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk


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 Post subject: Re: lux engine specs/differences
PostPosted: Fri Jan 16, 2009 12:03 am 
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brett , i dont beleive the bores on an old 44 would take it lol i'll be getting a controller anyway as i dont want an instant bang even with 75 jets but that much would worry me .

i wont be going stg3 on the head anyway (so im looking at around £250 for the head) :) i dont think it will need alot of work to allow the 35bhp increase i want. all at a guess but id say the bosch and inlet are making the biggest mess of the engine and the ex manifold im sure can be massively improved on. after that id rather supercharge than go wild with the head and cam , i like to hear them rev but not at the expense of drivability and low down pull :D


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 Post subject: Re: lux engine specs/differences
PostPosted: Fri Jan 16, 2009 3:03 am 
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944 wrote:
brett , i dont beleive the bores on an old 44 would take it lol i'll be getting a controller anyway as i dont want an instant bang even with 75 jets but that much would worry me .

i wont be going stg3 on the head anyway (so im looking at around £250 for the head) :) i dont think it will need alot of work to allow the 35bhp increase i want. all at a guess but id say the bosch and inlet are making the biggest mess of the engine and the ex manifold im sure can be massively improved on. after that id rather supercharge than go wild with the head and cam , i like to hear them rev but not at the expense of drivability and low down pull :D


Hi :)

I understand your point...but my 928 has done over 140,000 miles and i have done NO WORK on the engine at all for my Nitrous.

As you correctly say, with the right controller you can bring in the Nitrous "progressively" and with no hard torque hit...

Mine is the race version (Maxx Extreme Race) and is around £700 , but they also do a street version of it for around half that price, and its also very good.

All the best Brett :)

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-UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk


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 Post subject: Re: lux engine specs/differences
PostPosted: Fri Jan 16, 2009 10:21 am 
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700 for the controller? or gas set up aswell?
its a while since i looked into it but i think i found a basic controller for 200 and one with alot more functions etc for 350 . i would be happy with the basic one as im not racing the car and if i did a few 1/4's it would just be for a laugh. something where the gas increases the more the throttle is pressed would be nice :) as progressive as the engine itself , wouldnt even know it was there other than the car was actually quick lol


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