'92 LT1-C4 to L92/L99-T56 swap started
05-14-2012, 05:19 PM
#21
Racer
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I plan on reprogramming the '92 ECM to accept the ~46500 ppm factory that my 3.45:1 T56 car should produce. The ECM road speed variable has the range to accept that value, but the resolution suffers that high.
(IE 46080 , 48505, 51200, etc. are only accepted values)
I don't have the FX3 so I'm not sure if it gets a signal directly from the Transmission, or a filtered value through the ECM. If the latter, you might be able to do something similar if you don't want to purchase a Dakota SG5 box.
05-14-2012, 07:53 PM
#22
Melting Slicks
The ZF6 is a 4000pulse-per-mile (ppm) to my understanding, the T-56 is 17pulse-per-driveshaft-rev (ppds).
I plan on reprogramming the '92 ECM to accept the ~46500 ppm factory that my 3.45:1 T56 car should produce. The ECM road speed variable has the range to accept that value, but the resolution suffers that high.
(IE 46080 , 48505, 51200, etc. are only accepted values)
I don't have the FX3 so I'm not sure if it gets a signal directly from the Transmission, or a filtered value through the ECM. If the latter, you might be able to do something similar if you don't want to purchase a Dakota SG5 box.
I plan on reprogramming the '92 ECM to accept the ~46500 ppm factory that my 3.45:1 T56 car should produce. The ECM road speed variable has the range to accept that value, but the resolution suffers that high.
(IE 46080 , 48505, 51200, etc. are only accepted values)
I don't have the FX3 so I'm not sure if it gets a signal directly from the Transmission, or a filtered value through the ECM. If the latter, you might be able to do something similar if you don't want to purchase a Dakota SG5 box.
05-22-2012, 02:48 PM
#23
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Jags-that-run (stealth conversions) LS1 steam line adapter for upper radiator hose: (I later learned that the LT1 engines also had steam lines built in, so I'm able to reuse the stock LT1 steam vent to the expansion tank and don't need this JTR adapter...)
-6AN male/female inline 1/8-NPT port (Russell 670343) with (Jegs) fuel pressure gauge:
LS-swap fuse box (1997 MonteCarlo/Lumina) and E38 L92 ECM mounted in left front nose area where factory secondary AIR pump and cruise control vacuum canister were removed from:
EROD DBW gas pedal with vetteworks adapter bracket mounted along with new brake and clutch pedal pads from corvettecentral:
CompCams Trunion upgrade completed to all factory L92 rocker arms:
-6AN male/female inline 1/8-NPT port (Russell 670343) with (Jegs) fuel pressure gauge:
LS-swap fuse box (1997 MonteCarlo/Lumina) and E38 L92 ECM mounted in left front nose area where factory secondary AIR pump and cruise control vacuum canister were removed from:
EROD DBW gas pedal with vetteworks adapter bracket mounted along with new brake and clutch pedal pads from corvettecentral:
CompCams Trunion upgrade completed to all factory L92 rocker arms:
Last edited by 85MikeTPI; 06-08-2012 at 09:33 PM.
06-08-2012, 09:31 PM
#24
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LS3/L99 forged engine shortblock assembled - LHS
LS3/L99 forged engine shortblock assembled - RHS
LS3/L99 engine - ARP studded bottem-end
Tunnel shifter hole enlarged 2" for T56 offset, generic rubber seal fitted
Mock-up LS1 block,etc. removed. Enginebay cleaned and prepped for painting and wiring harness work for piggybacking '92 ECM
LS3/L99 forged engine shortblock assembled - RHS
LS3/L99 engine - ARP studded bottem-end
Tunnel shifter hole enlarged 2" for T56 offset, generic rubber seal fitted
Mock-up LS1 block,etc. removed. Enginebay cleaned and prepped for painting and wiring harness work for piggybacking '92 ECM
06-27-2012, 12:28 PM
#25
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POR-15 of enginebay
Cam Degreeing and PTV checks for VVT cam.
LS3 tensioner, Katech timing chain, installed dot-to-dot
Melling select 10296 oil pump with low-pressure (blue) spring installed. New L99 phaser and cam bolt/valve torqued to 42# + 90deg
Pickup tube and windage tray installed and loctite secured
New white "dumbell" oil diverter installed in block before rear cover goes on.
Rear cover with new RMS and block gasket
Front cover with new front seal and block gasket
Covers and heads loosely fit during longblock assembly.
Cam Degreeing and PTV checks for VVT cam.
LS3 tensioner, Katech timing chain, installed dot-to-dot
Melling select 10296 oil pump with low-pressure (blue) spring installed. New L99 phaser and cam bolt/valve torqued to 42# + 90deg
Pickup tube and windage tray installed and loctite secured
New white "dumbell" oil diverter installed in block before rear cover goes on.
Rear cover with new RMS and block gasket
Front cover with new front seal and block gasket
Covers and heads loosely fit during longblock assembly.
Last edited by 85MikeTPI; 07-06-2012 at 10:29 AM.
07-06-2012, 10:21 AM
#26
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Lunati (Morel) Street Link-bar hyd lifters, LS9 MLS head gaskets, ARP head studs
CompCams Trunion Upgraded investment rockers. CompCams 7.350" HiTech Pushrods. PAC1518 springs installed on L92 heads after valve-job and port clean-up.
Swinging on the cherrypicker ready for final prep work before install
LS7 Clutch and Flywheel installed. (Old T56 input shaft used as alignment tool) Quicktime SFI motor plate loosely fit behind FW
Motor installed into the engine bay. ATI balancer installed.
Quicktime SFI bellhousing bolted to block and secured to motor plate
Stock T56 slave cylinder installed with teflon hyd AN lines adapted between slave and Stock Master cylinder and speed bleeder.
Hybrid SSR T56 installed
C-beam mounted with custom bolt plates
Front Engine Accessory Drive (FEAD) installed and belt routed
2010 Camaro LS3 starter installed
T56 shifter pad through widened tunnel hole. C-beam adapter and c-beam bolt plates shown.
MGW shifter and FMS **** test fit
Test fit of header, coil packs, intake before beginning wiring
CompCams Trunion Upgraded investment rockers. CompCams 7.350" HiTech Pushrods. PAC1518 springs installed on L92 heads after valve-job and port clean-up.
Swinging on the cherrypicker ready for final prep work before install
LS7 Clutch and Flywheel installed. (Old T56 input shaft used as alignment tool) Quicktime SFI motor plate loosely fit behind FW
Motor installed into the engine bay. ATI balancer installed.
Quicktime SFI bellhousing bolted to block and secured to motor plate
Stock T56 slave cylinder installed with teflon hyd AN lines adapted between slave and Stock Master cylinder and speed bleeder.
Hybrid SSR T56 installed
C-beam mounted with custom bolt plates
Front Engine Accessory Drive (FEAD) installed and belt routed
2010 Camaro LS3 starter installed
T56 shifter pad through widened tunnel hole. C-beam adapter and c-beam bolt plates shown.
MGW shifter and FMS **** test fit
Test fit of header, coil packs, intake before beginning wiring
Last edited by 85MikeTPI; 07-06-2012 at 10:31 AM.
07-29-2012, 08:02 PM
#31
Safety Car
08-02-2012, 03:44 PM
#33
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Solid LT1 motor mounts (from fellow CF member "Churchkey"), POR15 coated. The sagging used stock mounts caused some oilpan and accessory belt clearance problems.
Denny's custom 3.5-inch aluminum driveshaft. TH400 slip yoke (mates with my 32spline SSR hybrid T56) with 1350 u-joint and a new Dana44 pinion yoke with 1350 u-joint. C-beam clearancing required
Starter (2010 LS3 Camaro) mounted, RHS engine wiring done, RHS header installed.
Denny's custom 3.5-inch aluminum driveshaft. TH400 slip yoke (mates with my 32spline SSR hybrid T56) with 1350 u-joint and a new Dana44 pinion yoke with 1350 u-joint. C-beam clearancing required
Starter (2010 LS3 Camaro) mounted, RHS engine wiring done, RHS header installed.
Last edited by 85MikeTPI; 08-03-2012 at 01:02 PM.
08-03-2012, 12:21 PM
#34
Safety Car
Getting there...
I want to make solid mounts that eliminate the adapter plate and our stock fluid mounts. Probably a winter project.
Curious - how much did the custom driveshaft run you?
I want to make solid mounts that eliminate the adapter plate and our stock fluid mounts. Probably a winter project.
Curious - how much did the custom driveshaft run you?
08-03-2012, 01:01 PM
#35
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Driveshaft was $525 flat rate for the 3.5" 6061-T6 1350 u-joint aluminum. No extra charge for the TH400 32-spline yoke over any other size. I couldn't use my Strange billet yoke because for some reason it's thicker around the u-joint and hit the T-56 Cbeam adapter from ProStreetCustoms (Tommys speed shop)
http://www.dennysdriveshaft.com/p139...7_inch_cl.html
The Dana44 1350 pinion yoke was another $80.
09-07-2012, 08:02 PM
#36
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Motor is in. Spent most of August with the engine wiring. Still waiting for shop time to have the exhaust system made. I have the idle tune working, still tons of tuning to do once I can it out on the road. Trying to get it road worthy to make the Ocean City, MD Corvette Weekend in October.
http://www.youtube.com/watch?v=Nnj8m...e_gdata_player
Video clip with open headers, idling, ECM Scanning and dash tach, and some exhaust temps taken soon after startup.
http://www.youtube.com/watch?v=Nnj8m...e_gdata_player
Video clip with open headers, idling, ECM Scanning and dash tach, and some exhaust temps taken soon after startup.
Last edited by 85MikeTPI; 09-07-2012 at 10:00 PM.
09-07-2012, 10:52 PM
#39
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10-01-2012, 03:32 PM
#40
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Pedals and covers all installed. OBD-II port mounted and original ALDL/OBD-I port sitting on top of the cover for infrequently needed access.
17" 2005 GTO spare tire if/when I ever decide to go to a bigger brake setup.
Car back on stands for spare-tire and exhaust work.
Spare and carrier mounted (but not fully up) and Billy Boat 3" ZR1 axle-back exhaust wire-tied up for mockup.
Car is currently on the trailer for an appointment at the Exhaust Shop Wednesday (Oct. 3). Hopefully that will go well, along with a trip to the MVA and can start road tuning on Friday.
17" 2005 GTO spare tire if/when I ever decide to go to a bigger brake setup.
Car back on stands for spare-tire and exhaust work.
Spare and carrier mounted (but not fully up) and Billy Boat 3" ZR1 axle-back exhaust wire-tied up for mockup.
Car is currently on the trailer for an appointment at the Exhaust Shop Wednesday (Oct. 3). Hopefully that will go well, along with a trip to the MVA and can start road tuning on Friday.