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07-10-2009, 09:41 AM
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#1
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Join Date: Dec 2008
Location: Union NJ
Posts: 246
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LT1 Opti Conversion Non vented to vented
What do I need to convert a non vented opti spark on a 93 block to a vented opti spark for a 95 timing cover?
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94 Z28 Charcoal Grey Metallic - Engine and Trans Delete Mod.. Light as Hell 
07' Saturn Aura - Daily
94' Camaro LSX SWAP  someday....- Drive Way Ornament 
98' Camaro LS1 M6 - SOLD
98' GTP Forged and saw 14lbs of boost - Grenaded and SOLD
Quote:
Originally Posted by SmokingSS
the best ricers to mess with are the ones that have those annoying blue and red lights. they are very persistent, ill give them that...
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07-10-2009, 11:18 AM
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#2
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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you need the later timing cover, a 95+ cam (longer dowel pin), vented opti with vacuum harness, and i believe the timing chain/components. not positive on the last part.
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07-10-2009, 11:32 AM
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#3
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11 second club / Moderator
Join Date: Aug 2004
Location: West Berlin, NJ
Posts: 7,148
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You will need to put a hole in the intake elbow and a 90* vacuum line connector for that.
I don't think the timing chain would be different. Its the same part number for years 92-97
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2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
Last edited by WildBillyT; 07-10-2009 at 01:10 PM.
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07-10-2009, 12:29 PM
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#4
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Join Date: Dec 2005
Location: Boston/North
Posts: 9,214
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I've looked it up, it really wasn't worth it IMO
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Quote:
Originally Posted by BonzoHansen
dumbass.
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07-10-2009, 02:46 PM
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#5
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11 second club / Moderator
Join Date: Aug 2004
Location: West Berlin, NJ
Posts: 7,148
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Quote:
Originally Posted by Knipps
I've looked it up, it really wasn't worth it IMO
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its hard to find actual proof that the vented opti is more reliable. I could assume that it would be allowing internal ozone and moisture to escape.
The price of a vented opti is significantly cheaper, but does it outweigh the price and labor of the conversion?
__________________
2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
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07-10-2009, 03:21 PM
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#6
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11 Second Club
Join Date: Feb 2006
Posts: 932
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Delteq..  or convert over to a LS1 style setup.
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2004 GTO GMM shifter Spohn stuff, tint and my love......
1988 Camaro Vert -Sold
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07-10-2009, 03:21 PM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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the main thing to do is an electric waterpump and seal the openings for the drive and weep hole.
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07-10-2009, 06:36 PM
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#8
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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If he has no opti now, I would say its most def worth going vented.
But you need as stated above, longer cam dowel, vented opti, lines with flow reducers, newer PCM, and new timing cover.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-11-2009, 09:52 AM
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#9
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,215
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I've seen the non vented last longer than the vented so I think the venting allowed more moisture problems somehow(probably when the car was sitting). I'm not sure it's really worth it unless you already have it torn apart now.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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07-11-2009, 09:58 AM
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#10
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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I am not sure of this logic but, non vented opti means a 93 PCM (for him) which means chips, chips are teh suck.
Vented opti could mean newer PCM and much more tuning options.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-11-2009, 10:01 AM
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#11
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11 second club / Moderator
Join Date: Aug 2004
Location: West Berlin, NJ
Posts: 7,148
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Quote:
Originally Posted by Shownomercy
I am not sure of this logic but, non vented opti means a 93 PCM (for him) which means chips, chips are teh suck.
Vented opti could mean newer PCM and much more tuning options.
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94 was non-vented also.
__________________
2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
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07-11-2009, 10:23 AM
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#12
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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Quote:
Originally Posted by deadtrend1
94 was non-vented also.
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yeah he is a newb. ignore. 
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07-11-2009, 10:29 AM
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#13
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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Did you guys miss the "(for him)" part?
His car is a 93....
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-11-2009, 10:37 AM
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#14
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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Quote:
Originally Posted by Shownomercy
Did you guys miss the "(for him)" part?
His car is a 93....
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with a 94 computer  harness is a 94 harness (maf) iirc
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07-11-2009, 11:53 AM
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#15
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Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,677
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Quote:
Originally Posted by Shownomercy
If he has no opti now, I would say its most def worth going vented.
But you need as stated above, longer cam dowel,
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Not only the dowel, the cam is different
Quote:
Originally Posted by Shownomercy
vented opti, lines with flow reducers, newer PCM
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A new PCM isn't necessary with a vented opti.
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John
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07-13-2009, 12:18 PM
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#16
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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You have stupercharged in you username? If you have or plan to use boost then you need to modify the vacuum line with a check valve into the vaccum side and a seperate filter on the innlet side so that boost pressure isn't allowed to go back into the opti. Boost pressure into the opti will distort and damage the Optical wheel.
Part Part Number
95 GM Optispark 1104032
95 Opti elec harness 12130319
Opti vacuum harness 12555323
Opti vacuum fitting 14082470
95 Timing cover (incl all 3 seals) 12552426
GM timing cover gasket 10128293
95 Cam Timing Gear* 10206039
Stock replacement timing chain* 10128485
Water Pump Gaskets (2 required) 10128343
* Part numbers for stock chain, can also use LT4, extreem duty or aftermarket TC sets such as Summit.
The longer drive pins can be bought from GM. Sorry, I can't locate that part number. Lingenfelter also sells them, or use too. you do not need to change the cam, 92-93 LT1 cams work with 94+ opti drives, only hte drive pin needs to be changed.
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
Last edited by Pampered-Z; 07-13-2009 at 12:26 PM.
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07-13-2009, 12:53 PM
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#17
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,368
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he had a gxp or something before, pampered
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07-13-2009, 03:25 PM
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#18
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Join Date: Jun 2007
Location: Arm pit of the world... NJ
Posts: 2,677
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Quote:
Originally Posted by Pampered-Z
you do not need to change the cam, 92-93 LT1 cams work with 94+ opti drives, only hte drive pin needs to be changed.
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You must be getting old and the memory must be going. The cams are definitely different. Damn kids! 
Stock 93 LT1
95+ aftermarket
Side by side, 95 on the left stock 93 on the right.
Another side by side.
As you can see the 93 cam has a taper and a very short hole. The 95+ has a straight deep hole.
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John
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07-13-2009, 04:27 PM
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#19
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,938
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__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-14-2009, 11:00 AM
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#20
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Quote:
Originally Posted by Featherburner
You must be getting old and the memory must be going. The cams are definitely different. Damn kids! |
DUH! And that's why my tech page remains unfinished!
__________________
93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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07-16-2009, 12:40 AM
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#21
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Join Date: Dec 2008
Location: Union NJ
Posts: 246
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Quote:
Originally Posted by Shownomercy
Did you guys miss the "(for him)" part?
His car is a 93....
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No no no the car is a 1994 the engine is a 1993 the harness and pcm are all 1994
__________________
94 Z28 Charcoal Grey Metallic - Engine and Trans Delete Mod.. Light as Hell
07' Saturn Aura - Daily
94' Camaro LSX SWAP someday....- Drive Way Ornament
98' Camaro LS1 M6 - SOLD
98' GTP Forged and saw 14lbs of boost - Grenaded and SOLD
Quote:
Originally Posted by SmokingSS
the best ricers to mess with are the ones that have those annoying blue and red lights. they are very persistent, ill give them that...
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