944Hybrids: 924/944/968 and 928 V8 Conversions
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HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
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gt1scca / 1986 944T LT1 Build

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Post  gt1scca on Fri Jan 22, 2010 11:05 pm

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1986 Porsche 944 Turbo / 1996 GM LT1 Conversion

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I originally purchased the "roller" 1986 944T (no engine or transaxle) with 120K original miles for $750. The car had been parked for 12+ years, so I expected the rack to be one of the first restorations. I snagged a 1983 manual rack, complete with tie rods and steering coupler for $250. No more fluid leaks...

I am planning on installing a 1987 N/A transaxle donated by a parts car I have, and will upgrade if I pulverize it. I will track the car some, so at least an aftermarket cooler may be retrofitted.

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I picked up a ~100K mile 1996 LT1, PCM, harness, (4) O2 sensors, all accessories, running and in EC for $500. If I need to "freshen it up" a little, the budget is slightly flexible. I modified my own LT1 (GM) harness, at a cost of less than $50 (heat-shrink, solder, connectors, relays, etc.). Wiring modifications for the LT1 and LS series engines are fairly easy with the right schematics...

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Parts Required (and Optional) for the 944 / LT1 Conversion:

HEADERS / PATRIOT CERAMIC COATED #H-8051-1
SLP 160 DEG. T-STAT / #847-100224 / ('92-'97 CAMARO / FIREBIRD)
CSR ELECTRIC WATER PUMP / #901LT1
MODIFIED LT1 OIL PAN / MYSELF...
MODIFIED LT1 WIRING HARNESS / MYSELF...
MSD STARTER / #5095
FLYWHEEL BOLTS / ARP #070-200-2802
NODULAR FLYWHEEL / GM #14088646 / 16 LB. / 153T
FUEL PRESSURE REGULATOR / AEROMOTIVE #13107
MSD PLUG WIRES / #MSD-32149
HIGH PRESSURE OIL PUMP / GM #12555884
CLUTCH DISC / CENTERFORCE DUAL FRICTION #CFT360056 10.4" X 1“ X 23 SPL. (MOPAR)
PRESSURE PLATE / CENTERFORCE DUAL FRICTION #383269 10.5“, ‘82 - ‘89 (GM)
SOLID TRANS. MOUNT / LINDSEY RACING #LRA-944-STM
FIREWALL REINFORCEMENT PLATE / 944v8s.com
ENGINE MOUNTS / 944v8s.com
URETHANE MOTOR MOUNTS / ENERGY SUSPENSION #3-1114R
THROTTLE CABLE / LOKAR #TC-1000HT / 24" L
LT4 KNOCK MODULE (PCM) / GM #16214681
LT4 KNOCK SENSOR / (2) S8003
FUEL RAIL COVERS / GM #10208794 / 10208795
C5 BH / #12551118
C5 BH ADAPTER / 944v8s.com
C5 HYD. T/O BEARING / GM #15070008
REMOTE C5 SPEED BLEEDER / TICK PERFORMANCE #TPSBL
HEATER CONTROL VALVE / READY-AIRE #5930
PILOT BEARING / PORSCHE 944 #944270
COOLANT TEMP. SENDER / VDO #323421
OIL PRESS. SENDER / VDO #360009
SERPENTINE BELT / DAYCO #5050315
PCM / OBDII (WITH ENGINE) / GM #16214399
ALTERNATOR / CS-130
FAN RELAY / TYCO/BOSCH #V23232-D0001-X001
VSS SPEED SENSOR / BWD #S8365 / 1998 CAMARO M/T
VSS PIGTAIL / GM #12085498
TILTON DUAL MC BAL. BAR / #72-610
5/8" FT. / 3/4" R. WILWOOD MASTER CYLINDERS / #260-10371, 260-10372
WILWOOD 7/8" CLUTCH MC / #260-10374
CUSTOM CLUTCH MC PUSHROD CLEVIS / 944v8s.com
1/8 NPT TO -4AN ADAPTER / RUSSELL #660800
C5 SLAVE ROLL-PIN FITTING / -3AN TO ROLL PIN ADAPTER / RUSSELL #640281
4AN FML. SS STRAIGHT CLUTCH HOSE / RUSSELL 24" SPEED FLEX #64191924ERL
250 LB FRONT SPRINGS / WELTMEISTER #915724
3.5" X 4" X 90 ELBOW (INTAKE)
3.5" ALUMINUM TUBING (INTAKE)

FASTENERS:


C5 BH BOLTS / (LSX)
(5) M10 X 1.50 X 40

C5 BH BOLTS / (SBC, LT1)
(6) 3/8-16 X 1.5"

ENGINE UPRIGHTS, MOUNTS:
(2) 7/16 X 4 BOLTS
(4) 7/16 WASHERS
(6) 3/8-16 X 1"
(6) 3/8 LOCK WASHERS
(6) 3/8 FLAT WASHERS
(2) 1/2-20 X 2 (FINE) BOLTS
(2) 1/2-20 X 2 (FINE) LOCKNUTS
(2) 1/2 WASHERS

C5 BH ADAPTER PLATE:
(4) 7/16-14 X 1.5 STUDS
(4) 7/16-14 NUTS
(4) 7/16 SPRING-LOCK WASHERS
(2) 1/4-20 BUTTON HEAD BOLTS

MISCELLANEOUS:
SELF-ETCHING PRIMER / DAP 1690
DUPLI-COLOR W/ CERAMIC / DE 1632 CHRYSLER INDUSTRIAL RED


NOTE: Parts List is fairly complete to date, but stay tuned for updates and new parts...
VSS system, LT1 TB Relocation, etc.
(I ain't runnin' no stinkin' spacers on my caahh...) Rolling Eyes


Last edited by gt1scca on Mon Mar 29, 2010 7:49 am; edited 1 time in total

gt1scca

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Post  Arthropraxis on Sat Jan 23, 2010 6:58 am

Wow, that is a clean engine bay. Did you repaint it?
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Post  gt1scca on Sat Jan 23, 2010 11:27 am

Had to.
The T engine crapped a turbo, and cooked the paint.

Repainted the "cheap" way...

DUPLI-COLOR W/ CERAMIC / DE 1632 CHRYSLER INDUSTRIAL RED
...matches Guards Red pretty darn well.

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Post  Bluemach1 on Sat Jan 23, 2010 11:39 am

That was rattle can paint? Turned out very well!

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http://www.cardomain.com/ride/3378613

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Post  gt1scca on Sat Jan 23, 2010 1:29 pm

Thanks Ted,

Matches in the sun...
Fluorescent lights may manipulate color perception, though.
WTH, it's under the hood, right?

Also, I have perfected the firewall plate...
Check out the upcoming post in the F/S section.


Last edited by gt1scca on Wed Jan 27, 2010 10:34 pm; edited 1 time in total

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Post  Wild Bill on Sat Jan 23, 2010 2:14 pm

Looks great! You are finding better deals than I am however for some reason they still want $2500 for a bare LT1 up here.. You can almost even buy a NEW LS for what they are asking for used ones? Some reasonable deals on 5.3 and 6.0 L truck engines sometimes. Thanks for the part's list, the more information the better!
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Post  Oso on Wed Jan 27, 2010 4:50 pm

Nice!!
do you or anyone else happen to know the part number for the GM motor mounts... I have the uprights but if the numbers I have are right (3045 and 3046) they cost about $140 each!! Doesn't seen right...

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Post  modenas on Wed Jan 27, 2010 5:14 pm

i paid 30 for a pair
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Post  gt1scca on Wed Jan 27, 2010 5:30 pm

Energy Suspension - 3-1114R

("early style "short and wide" motor mount that measures 2 5/8 in. between the ears and 1 3/4 in. tall to the center of the through bolt hole")

3-1114R @ Summit Racing

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Post  robstah on Wed Jan 27, 2010 7:35 pm

Just to note the above, those mounts are sold individually, just in case no one bothers reading that on the site. All I know is that I need to order another mount. Embarassed

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Post  stuart f. wright on Wed Jan 27, 2010 7:57 pm

looks nice youd probaly have it done if you want busy helping all of us with your parts and tech advice thank you by the way
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Post  Porch on Wed Jan 27, 2010 9:11 pm

Looks great!! You've obviously spent a lot of time to get everything "just right"...looking forward to seeing the final product!
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Post  gt1scca on Sat Feb 06, 2010 8:31 pm

Here's a preview...
(May axe the GS hash marks, though.)

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In the meantime,
Waiting on a few warm days for this...
Tilton 72-610 Dual MC Balance Bar
Wilwood 5/8" FT / 3/4" R (# 260-10371, 260-10372)
And of course, a Firewall Reinforcement Plate to support the Wilwood 260-10374 (7/8" Clutch MC)...

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Kyle is more impatient than I am...

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Post  gt1scca on Fri Mar 26, 2010 3:17 am

Finally getting something done here...

The crossmember is out for final engine mount / oil pan mock-up. It looks like I won't be trimming the crossmember, but the LT1 windage tray may get a snip or two. The Milodon 30902 is also getting a dose of Plasma. Cuttin' it all the way to the sump, and setting it 1/2" (maybe even less) above the top of the crossmember. The installation of an '83 manual rack will free up some needed space @ the oil pan - the manual rack sits flush with the top of the crossmember.

Also started on the shortened uprights:

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Room for improved relations...

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1.0" OD / .50" ID DOM top tube, lathed @ 2 9/16" long for a snug mount...


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Water-jetted 3.25" Dia. base plate (These may also be cut from .125" steel and used as shims
under the LT or LS uprights for fine-tuning height if needed - You can "grow" an upright, but
you can't shrink one. Arrow)...


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1.50" DOM / .120 wall vertical tube - "She looka like-a she fit"...

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Get 'er hot, and burn-up that tempo-jig...

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Ready fo' sum paint - I wuvvvv ta paint...

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Short 'n' Sweet, and spacer-free.
I like-a-mah LT...

Cool

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Post  gt1scca on Fri Mar 26, 2010 2:52 pm

I awso wyke ta take pixars...jocolor

This time with a set of 3/8" shorter uprights...

Windage tray will be trimmed for certain, but updated oil pan modifications provide clearance without trimming the crossmember...

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Windage tray front bolts will be replaced with standard length cap bolts...


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LT1 oil pan rail to crossmember spacing is 4.75" now - Milodon 30902 pan is 4.0" deep at the front seal, therefor modifications will not be as extreme as anticipated. Curvature of the pan rests well within the rack bosses.

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LT1 oil pan rail to the top of the throttle body overall dimension is ~16.0", added to the 4.75" distance from the oil pan rail to crossmember = 20.75". This means the top of the LT1 throttle body will sit at or below the center hood rib - no trimming required.

Awesome.

Complete transaxle and engine installation is up next...

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Post  gt1scca on Sat Mar 27, 2010 3:33 am

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Post  gt1scca on Sat Apr 03, 2010 12:58 pm

Updates:

dcAuto allows "make-an-offer" on certain parts. I bagged this M030 front swaybar for $50, and it even came with end links and bushings - all hardware. Shipping was pricey, but it was still a deal in my book.

Oh yeah - It gots ta be RED.

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I made a few changes to the C5 adapter plate, as I am not re-machining another plate for hydraulic line clearance. The machine depth of these changes are .25", instead of a ball-mill depth of .375" - .400". This cut should not compromise any strength of the plate, as there are minimal shear loads present in this area. An analysis in SolidWorks 2008 confirms this. The reliefs around the 7/16" studs remain for thread depth requirements, and the C5 slave will still require trimming in 3 locations.

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Post  ghostcloak on Sat Apr 03, 2010 7:03 pm

Beauty-freaking-ful man. I've done a lot of business with the guys there. I love DC Auto. TIP: If you visit them with cash in hand, they seem to be more open to negotiations...

They sent me a 5/18 rear brake regulator for cheap, and I got it next day! (granted, I only live 2 hours away from them Laughing )
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Post  DVC on Sun Apr 04, 2010 4:29 pm

Wow, that is coming along beautifully! Keep up the great work. Kyle is reading to start drifting that beast Cool
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Post  gt1scca on Mon Apr 05, 2010 1:24 am

Thanks guys.
I figure, why not do it right the first time? Everything is apart, so clean / paint / coat it all and be done with it. It may take longer this way, but I won't have to tear it back down to do it all later.

DVC wrote:Kyle is reading to start drifting that beast...

He has amazing manual dexterity already (15 months - Where did that time go?), and he already likes going fast. He kicks his car seat if I'm driving "sensibly". I think he's gonna be a speed-freak just like Daddy...

I asked for it.
I have about 14 years to find another "project roller".

Razz

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Post  gt1scca on Sat May 08, 2010 12:55 am

Modified the Milodon 30902 Oil Pan finally:

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The curvature of the front of the pan is retained to the sump, and allows the pan to sit between
the rack bosses of the crossmember. Even with the shorter LS engine uprights, there is more than adequate clearance @ the crossmember. The front of the factory windage tray will need to be trimmed, and 2 new standard main cap bolts installed. The highest point of the front section is 4"
at the center, with the radius following that of the front seal.

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