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Let's play before and after
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Sat Aug 21, 2010 1:02 pm    Post subject: Let's play before and after Reply with quote

Before



After



I kinda like the after better myself. And yes, it is as good on the inside as it looks on the outside. Haven't started tuning things yet but she howls like a pack of banshees released from the gates of hades.
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11374
Location: PacNW

PostPosted: Sat Aug 21, 2010 1:06 pm    Post subject: Reply with quote

<= has chubby
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Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
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ideola  



Joined: 01 Oct 2004
Posts: 15421
Location: Woodstock IL

PostPosted: Sat Aug 21, 2010 1:15 pm    Post subject: Reply with quote

Very tidy! Is that the big valve head, or was that for a different project? How 'bout some specs?
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88 924S SE | 82 931 Holbert | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition
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Zeek  



Joined: 09 Jul 2010
Posts: 107
Location: Shady Side, MD

PostPosted: Sat Aug 21, 2010 1:16 pm    Post subject: Reply with quote

Did you change out one of the pulleys as well?

That is a VERRRRY clean engine. Congrats on a job well done.
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Sat Aug 21, 2010 1:29 pm    Post subject: Reply with quote

Hmm, specs. I don't want to tell all. But here are a few tidbits.

Yes, it has one of the big valve heads I got my hands on, full P&P, manny matched, all that, etc.
Cossie alloy pistons, custom cut to work with the big valve head.
Elgin race cam
10.5:1 CR
45 DCOE
Fidanza Al flywheel

Same bursch jet-hot header as before, straight pipe to the supertrapp. L-O-U-D, 'specially when she comes on cam. I think this might change a little as I get the timing dialed in.

The tensioner has been moved of course to accommodate the change in head-block geometry. I think I'll go with an adjustable cam pulley but haven't found one I like yet.

Bottom end has had some work done, mostly for longevity, but has been balanced, lightened, etc., enough so to make things interesting.

There's also some really trick stuff there that's not obvious too that the builder did, like that's an S2 throttle cable on the webers that's wrapped back around on itself with the pulley vertically at the back of the carbies. And, he replaced the coolant tank with a 944 unit to clear out the front of the engine compartment. I just stood there looking at it and there's little cool things all over the place where its been tweeked and changed that you just don't notice right away.

So anyway, I still have a bunch of stuff to do, and have to get through the break-in period but wow, it really has shown some potential. This ain't your grandma's toofah.
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11960
Location: Oregon, Denver Colorado native!

PostPosted: Sat Aug 21, 2010 2:01 pm    Post subject: Reply with quote

Yeas Ive kind a been round the corner on this emoore924..
and I can say from the descrip and picsits just nasty.
Good work man.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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ideola  



Joined: 01 Oct 2004
Posts: 15421
Location: Woodstock IL

PostPosted: Sat Aug 21, 2010 8:16 pm    Post subject: Reply with quote

Is that a phenolic spacer I see between the carbs and the mani?
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88 924S SE | 82 931 Holbert | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition
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the_mad_electrician  



Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia

PostPosted: Sun Aug 22, 2010 2:03 am    Post subject: Reply with quote

Wow 10.5:1 that's some impressive compression! I'm going to steal that idea about the 944 coolant tank Where'd you get those plugs for the old injectors?
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81 924 N/A

2004 Ranger "Edge"

2005 Mazda 6
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11374
Location: PacNW

PostPosted: Sun Aug 22, 2010 2:29 am    Post subject: Reply with quote

Looks great. . .and you probably know this, but there are some adjustable pulleys for Rabbit Mark I that will work.
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Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11960
Location: Oregon, Denver Colorado native!

PostPosted: Sun Aug 22, 2010 11:52 am    Post subject: Reply with quote

Hook up some oxy. masks and a tank cause youll need it the way your gonna fly chuckle chuckle.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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emoore924  



Joined: 13 Apr 2004
Posts: 2790

PostPosted: Mon Aug 23, 2010 3:11 am    Post subject: Reply with quote

Yeah, 10.5:1 took us a little while but we were able to do it with a combo of pistons, head, head gasket and block "adjustments" to get it all to come together and hit the targeted CR. So far so good on pump gas.

That 944 tank is one of those "Duh, I wish I'd thought of that" kind of things. A very clean idea that un-clutters the front/top of the engine compartment and very simple too. IDK if it would work with a regular 924 raddy but I guess it would, why not? Simply a matter of fabrication.

The plugs for the old injector holes in the head are simply injector plugs with a penny (or was it a nickle) placed at the bottom of the hole, then the plug was screwed in with a little permatex. They're taking vacuum not pressure so they just have to seal.

Yep, phenolic spacers.

Thanks for the tip on the cam pulley. I will check that out.
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Joes924Racer  



Joined: 03 Nov 2002
Posts: 11960
Location: Oregon, Denver Colorado native!

PostPosted: Mon Aug 23, 2010 6:36 am    Post subject: Reply with quote

.... Emoore924 cheers youve really surprised me with the build..
Think youll get any clutch slippage that might be somemthing to
address bout. Watch out you dont run over any more parts or
anything else sitting in the drive behind it or we will start calling you runovermoore parts 924,

Cheers Joes924racer.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.
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lo41 black 924  



Joined: 05 Apr 2010
Posts: 66
Location: london

PostPosted: Mon Aug 30, 2010 1:49 am    Post subject: Reply with quote

i know about these engines they dont respond well to tuning i think you can expect to see about -5 drop in bhp with all the work esitmated 90 bhp
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Nobbi  



Joined: 24 Aug 2006
Posts: 1355
Location: Germany

PostPosted: Mon Aug 30, 2010 4:26 am    Post subject: Reply with quote

yes, 90 horses.Thats what the Light truck Volkswagen LT delivers with the carb setup. Dont get why people doing it anyhow?
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NA 924 - april/1977- 4-speed-audi gearbox.
500.000 km with fun.....and new toy:Porsche 944 S2 Cabriolet.Other car Daimler c-class cabby,brandnew!

Plus new in the stable..1982 NA in grand prix white.
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the_mad_electrician  



Joined: 16 Nov 2009
Posts: 1073
Location: Central Georgia

PostPosted: Mon Aug 30, 2010 5:05 am    Post subject: Reply with quote

lo41 black 924 wrote:
i know about these engines they dont respond well to tuning i think you can expect to see about -5 drop in bhp with all the work esitmated 90 bhp



Head work, 10.5-1 compression, hot cam, Webers. If he sees less power with this set something is wrong with the universe.
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81 924 N/A

2004 Ranger "Edge"

2005 Mazda 6
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