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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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 Posted: Sun May 06, 2007 4:26 pm Post subject: Engine Removal |
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Guy's,
Quick question regarding the removal of the 24's engine. Is it easier to drop the crossmember and leave the torque tube in place, or do as i do, and pull the gearbox ect.
With the crossmember method, does the geo need re setting after??
Any pro's or cons?
Steve |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Sun May 06, 2007 5:24 pm Post subject: |
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The crossmember has oval mounting holes so it moves a bit.....so you could see some chamber difference between the front wheels after you put it back.
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Supercharger and EFI kits
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NEMESIS
Joined: 29 Jul 2006
Posts: 296
Location: BamaLamaDingGone, of course!
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| Posted: Sun May 06, 2007 9:55 pm Post subject: |
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I find dropping the CM to be much easier than the trans. You may have to make a few adjustments after reassembly, but pay attention to the wear marks on the mounting holes for the CM and you should be able to get it back in almost the exact same position. I've yet to need an alingment or anything after doing this more than a couple times, and everything tracks just fine.
I also find it quite helpful to pull the radiator fan assembly to give more room to slide the engine forward off of the shaft. In the stock turbo cars I think it's mandatory, or at least I've had no luck with them in.
Has anyone tried, or even given any thought to, a 3 piece crossmember ala Lindsey Racing? Seems simple enough. Cut crossmember, weld on two plates per side, and bolt back together. Seems to work the treat on the 944 series so I see no reason why it would be any less effective on the 924.
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PORSCHEV
Joined: 02 Nov 2002
Posts: 1901
Location: Cedar Lake Nova Scotia, Canada
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| Posted: Sun May 06, 2007 10:50 pm Post subject: |
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It won't work on the 924..the mounting holes to the body are different.
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1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.
1978-#53 "D" track racer. |
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NEMESIS
Joined: 29 Jul 2006
Posts: 296
Location: BamaLamaDingGone, of course!
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| Posted: Sun May 06, 2007 11:18 pm Post subject: |
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| PORSCHEV wrote: | | It won't work on the 924..the mounting holes to the body are different. |
You are going to have to show me why it won't work. Essentially the CM is the same. It bolts to the frame rail, has the steering rack mounts in the same general location, as well as the suspension pick up points. If you can prove your theory great, but until then, I have to respectfully disagree with your statement.
In case I was unclear, I'm not talking about using a 944 CM, I'm brighter than that. I was talking about making one from a 924 CM, just like LR does with the 944 unit. |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Sun May 06, 2007 11:37 pm Post subject: |
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that would realy be nice to have !
i have a spare CM. After i'm finished with school i'll give it a try and see what i can come up with.
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PORSCHEV
Joined: 02 Nov 2002
Posts: 1901
Location: Cedar Lake Nova Scotia, Canada
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| Posted: Mon May 07, 2007 1:43 am Post subject: |
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| NEMESIS wrote: | | PORSCHEV wrote: | | It won't work on the 924..the mounting holes to the body are different. |
You are going to have to show me why it won't work. Essentially the CM is the same. It bolts to the frame rail, has the steering rack mounts in the same general location, as well as the suspension pick up points. If you can prove your theory great, but until then, I have to respectfully disagree with your statement.
In case I was unclear, I'm not talking about using a 944 CM, I'm brighter than that. I was talking about making one from a 924 CM, just like LR does with the 944 unit. |
On the 924 where the cross member bolts to the body the mounting holes are closer togther. If you made your own from a 924 CM it would work fine.
Someone is testy 
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1976 924
5 lug conversion, 17'C2 wheels,custom body work,327 vette engine.
1978-#53 "D" track racer. |
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NEMESIS
Joined: 29 Jul 2006
Posts: 296
Location: BamaLamaDingGone, of course!
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| Posted: Mon May 07, 2007 10:28 am Post subject: |
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| NEMESIS wrote: | | PORSCHEV wrote: | | It won't work on the 924..the mounting holes to the body are different. |
 You are going to have to show me why it won't work. Essentially the CM is the same. It bolts to the frame rail, has the steering rack mounts in the same general location, as well as the suspension pick up points. If you can prove your theory great, but until then, I have to respectfully disagree with your statement.  
In case I was unclear, I'm not talking about using a 944 CM, I'm brighter than that.  I was talking about making one from a 924 CM, just like LR does with the 944 unit. |
No testiness here, just a somewhat technical discussion so clarity is key. I don't want anyone to think that this is not a 100% do-able mod because it is in my opinion, and one that I don't think has come up before. I added my intent to the above quote, again I guess for clarity's sake.
Sorry for the minor highjack Steve, but I think you can appreciate the spirit of the discussion. It's at the least food for thought eh? |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Mon May 07, 2007 10:53 am Post subject: |
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Hey Arch,
Hijack away!! Actually, that is a pretty nifty idea. I've got a spare CM that i might well measure up for this.
Uh ho, i feel another modifcation session coming on.............. |
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NEMESIS
Joined: 29 Jul 2006
Posts: 296
Location: BamaLamaDingGone, of course!
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| Posted: Mon May 07, 2007 11:50 am Post subject: |
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| bass gt wrote: | Hey Arch,
Hijack away!! Actually, that is a pretty nifty idea. I've got a spare CM that i might well measure up for this.
Uh ho, i feel another modifcation session coming on.............. |
Figured as much.  I'll give it a week maybe two and you'll have one more thing for all of us to envy. Seems real straight forward to me and well worth it considering the number of times you will probably R&R a race engine over the life of the car (if you're lucky) |
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bass gt
Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!
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| Posted: Mon May 07, 2007 12:39 pm Post subject: |
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Other than supporting the steering rack, does the centre section of the CM provide any structural purpose?? I have access to some whizzo machinery, and i'm wondering about making a demountable ali CM
Hmmm
Steve |
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Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
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| Posted: Mon May 07, 2007 4:15 pm Post subject: |
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No steve it doesnt though you can wipe out
tires if you dont be careful. or have it checked aftwards
for alignment. Ive taken mine off enough times.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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Benino
Joined: 30 Jan 2003
Posts: 508
Location: Vista, CA (San Diego County)
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| Posted: Wed May 09, 2007 5:46 am Post subject: |
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| morghen wrote: | | The crossmember has oval mounting holes so it moves a bit.....so you could see some chamber difference between the front wheels after you put it back. |
I believe it has oval mounting holes on one side only. I think the drivers side has the oval holes and the pass side has the round holes. It shouldn't move much at all. The mounting holes that are not oval are pretty close in diameter to the mounting studs. I've dropped the crossmember to pull the engine. Much easier than tranny drop.
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1980 Porsche 924 N/A USA
1980 Porsche 924 turbo USA
1987 Porsche 944S USA |
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924 FAQ (Technical)
