924Board.org

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

I totally agree with Rasta.

If it was a dumb idea, why has porsche moved the turbo to the other side?
The 931 was the first front engined turbo porsche, the 951 an evolution on that, so the fact that they moved the turbo to the other side says enough for me.

I think the difference in spool time will be 50rpm or less; unnoticable.
There's a lot of other factors which have probably more influence.

I've seen the performance of that dutch dude who just put on a semi-random turbo with a 951 style setup and he pulled 210 hp.

Unless we're all driving on the track and really need those 200 rpm earlier spool, why bother going the hard way.
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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

flosho · Posted: Wed Mar 16, 2011 6:03 am Post subject:

The 951 also makes more power off boost, than a 931 does at full boost.

2.5L is a pretty good size 4 cylinder..
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[This Space For Rent]

Joes924Racer · Posted: Wed Mar 16, 2011 6:33 am Post subject:

It would take a little time and a good vert. band saw help.
Though the old fashionway is cool.

Moving the turbo to the other side - wow what an idea.
Ill have to take a look at that set-up. A-la 951.

Ive seen a few intakes built on the board... That would take
some time. Nice pics Mike Danger.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Wed Mar 16, 2011 6:43 am Post subject:

On the otherhand on mandrel bent tubes ... if some one would come up
with a design close to mikes where then bends are uniform and equal.
Kind a like a weld up kit ... what about making a solid mounting flange
for the tubes. I saw one not to long ago.

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

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Joes924Racer · Posted: Wed Mar 16, 2011 7:11 am Post subject:

Heres a nice custom set up i found ... though it is a 951
set up. Its well-built. Heres alink to his other pics. of the header
a install pic. It has a interesting features.

http://www.666fab.com/951/

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

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Joes924Racer · Posted: Wed Mar 16, 2011 7:18 am Post subject:

This guy builds and calls it Turbo Charged - Blitzkrieg Motorsports.
he does custom headers, turbo manifolds, intercooler plumbing, roll bars/cages he located on the east coast. Its OK really go ahead and click the link already
http://www.google.com/imgres?imgurl=http://www.666fab.com/951/1.jpg&imgrefurl=http://www.yellowbullet.com/forum/showthread.php%3Fp%3D4812111&usg=__5threilHFkfzWMmp2l3iJsv2LfM=&h=570&w=858&sz=113&hl=en&start=9&sig2=bLr2g-nm60QMAr_Gegpw1A&zoom=1&itbs=1&tbnid=YWFDmavnoEMoXM:&tbnh=96&tbnw=145&prev=/images%3Fq%3Dturb%2B951%2Bsetup%26hl%3Den%26sa%3DG%26gbv%3D2%26tbs%3Disch:1&ei=zNV_TceZPJG-sAOQrpHbBQ
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Shurick · Joined: 15 May 2005 Posts: 524 Location: Russia, Moscow.

MikeDanger · Joined: 21 Nov 2002 Posts: 774 Location: Denver

To answer some questions and concerns (and no offense to anyone but since I actually build and design things, I put them in to practice, as theory alone is worthless)

I didnt worry about trying to build these out of one peice, that would be very hard to get equal lengths with the spacing limitations. and They wouldnt be made out of mild steel for a part that would actually be used, this was just the fitting/mock up stage.

Most of the curves are cut from "doughnuts" and it works just fine, unless you have F1 money and resources... its still way better than anything else I could find.

My version as I stated earlier would put the turbo on the other side of the motor (like the 951) Where the AC compressor is, so the exhaust would go around the front of the motor. Also this would make plumbing for the front mount intercooler a little easier

I would probably shorten the straights that connect to the collector a little bit, and they would all 4 be slip fit joints to allow for heat expansion/contraction.

Additionally I would use V-band at the end of the collector(and along the rest of the exhaust sistem) To make installation and maintnece easier, but this would also allow one to put turbo right at the end of the collector. like the original system.

lets not forget about wastegate plumbing, and all that on the passenger side makes it tough and I think throws the balance of the motor way off.

Also I was using 1-5/8" tubing in stead of 1.5"
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It was either this or a giant box of legos

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

i think they moved the turbo on the other side for the 951 because the 2.5L is larger and they didnt have enough space.
why would anyone put the turbo so close to the intake for a road/city going car? for me its not enough that porsche put the turbo there on the 951....the GTR is a completely different business.
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