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morghen
Joined: 21 Jan 2005
Posts: 8880
Location: Romania
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 Posted: Fri Oct 09, 2015 12:58 am Post subject: |
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You can replace the head yourself.
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Fri Oct 09, 2015 1:11 am Post subject: |
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head? No, I want to modify cam.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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kcoyle
Joined: 15 Jan 2011
Posts: 712
Location: Long Island, NY
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| Posted: Fri Oct 09, 2015 4:11 am Post subject: |
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Chris79,
Please to find the Italian kind of this book somewhere. Then good conversation can be made.
http://www.amazon.com/gp/product/0870061836?psc=1&redirect=true&ref_=oh_aui_search_detailpage
All say there is very little more power to be made from this
engine for little money.
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1982 931- Stock with MBC at 8psi
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it. |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Fri Oct 09, 2015 4:27 am Post subject: |
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| chris79 wrote: | I can modify cam myself ? 
Really? |
No, they are having a joke at your expense.
C'mon guys, contribute something worthwhile or just ignore him. We get so few new people around here, let alone those that stay that being childish doesn't help.
That said, Chris, as we've discussed over and over again. There's no quick power upgrades available. No cheap or easy solutions. Save your money and do it right once. If you can't listen to what we've all told you over and over again then we will have to stop trying to help and begin ignoring your posts. Sorry, but it is getting exhausting repeating the same things over and over again.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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morghen
Joined: 21 Jan 2005
Posts: 8880
Location: Romania
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| Posted: Fri Oct 09, 2015 3:06 pm Post subject: |
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I wasnt joking, buy the Mittelmotor replacement head.
Take off the intake and exhaust manifold, have a new headgasket and timing belt ready. Replace the old head with the Mittelmotor head, dial in the valve timing using the makrs. Put everything back and enjoy a considerable amout of more power.
You can do this in your own garage, you only need the following:
-Mittelmotor head
-headgasket
-timing belt kit
-torque key
-set of spanners
http://www.mittelmotor.de/content/news/default.asp
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nickthompson
Joined: 26 Mar 2013
Posts: 873
Location: Central Georgia
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| Posted: Fri Oct 09, 2015 6:01 pm Post subject: |
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| morghen wrote: | I wasnt joking, buy the Mittelmotor replacement head.
Take off the intake and exhaust manifold, have a new headgasket and timing belt ready. Replace the old head with the Mittelmotor head, dial in the valve timing using the makrs. Put everything back and enjoy a considerable amout of more power.
You can do this in your own garage, you only need the following:
-Mittelmotor head
-headgasket
-timing belt kit
-torque key
-set of spanners
http://www.mittelmotor.de/content/news/default.asp |
You forgot the giant pile of cash for the Mittelmotor head.  |
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morghen
Joined: 21 Jan 2005
Posts: 8880
Location: Romania
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| Posted: Fri Oct 09, 2015 7:36 pm Post subject: |
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To be honest, a fresh head with 15hp peak more power and overall higher power and torque curves is worth that money. And yea the 924s are cheap..but thats the cool part...5k budget gets you a pretty fast and cool 924.
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Fri Oct 09, 2015 8:27 pm Post subject: |
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I agree with Morghen. Proven bolt-on parts are an ideal way to get into tuning cars.
It costs more initially but probably less in the long-run.
Buy some books and do your research on removing and refitting parts correctly, then go for the bolt-on route Chris.
You will learn a lot on the way.
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1979 UK 932 |
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Fri Oct 09, 2015 8:32 pm Post subject: |
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Relatively speaking, the Mittelmotor head is reasonably priced.
A well-known tuner here in the UK charges £2000 for a fully ported big valve 931 head.
That doesn't include the head core which you must supply yourself.
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1979 UK 932 |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Fri Oct 09, 2015 9:51 pm Post subject: |
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yes probably is the best bolt on, but more expensive for me.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sun Oct 25, 2015 1:04 am Post subject: |
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Anyone tried to create cad model of 924 head intake ?
It's possible to test air flow and optimize them with some tools cad based.
If anyone can provide this model, we can found a public way to fix 924 head, not?
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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morghen
Joined: 21 Jan 2005
Posts: 8880
Location: Romania
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| Posted: Sun Oct 25, 2015 2:05 am Post subject: |
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Mittelmotor have done this. If you would like to do it as well, it will cost more than the price Mittlemotor is asking for a fresh head that is "fixed" and gives you 15hp more.
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chris79
Joined: 29 Jan 2014
Posts: 551
Location: milan
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| Posted: Sun Oct 25, 2015 6:23 am Post subject: |
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I don't think, with a simple dremel it's possible to modify intakes and it's possibile even to add material where needed.
This work is free if made by itself.
I do not understand why a free forum is always pushing to spend so much money instead of proposing solutions.
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Porsche 924 2.0 na 125hp (1979) euro
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Alfa Romeo Spider "Duetto" 1.6 104hp (1986) euro |
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Harm
Joined: 02 Apr 2009
Posts: 1373
Location: Holland
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| Posted: Sun Oct 25, 2015 6:47 am Post subject: Re: performance improvements |
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| chris79 wrote: | I don't think, with a simple dremel it's possible to modify intakes and it's possibile even to add material where needed.
This work is free if made by itself.
I do not understand why a free forum is always pushing to spend so much money instead of proposing solutions. |
I do not understand why you keep whining like a kid on a free forum that holds over ten years of experience and you haven't read a darn single thread that will help you make up your mind.
Get a Dremel, work that head, and report back a year later what we are missing.
Thanks for your input.
Harm. |
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kcoyle
Joined: 15 Jan 2011
Posts: 712
Location: Long Island, NY
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| Posted: Sun Oct 25, 2015 9:52 am Post subject: |
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| chris79 wrote: | | I do not understand why a free forum is always pushing to spend so much money instead of proposing solutions. |
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1982 931- Stock with MBC at 8psi
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it. |
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924 FAQ (Technical)
