Donny_olds Posted December 10, 2023 Report Share Posted December 10, 2023 (edited) Here’s my 97 cutlass supreme sl ls4 swap progress over this last year. This has not been an easy swap whatsoever, we have had far too many hurdles but we’re still goin’. First off alternator and balancer clearance was a problem, so we had to cut and plate into my strut tower about 2 inches. factory subframe wasn’t gonna cut it so we had 2 options: newer Impala subrame which around here costed a fortune, or custom subframe, which we ended building and turned out not too shabby. all custom solid motor and tranny mounts. we had to get front knee assembly from a newer Impala and axles to mount up to the 4t65 tranny, and to get rid of the horrible 1st gen strut design. for control arms we are going with stock cutlass arms and cutting and plating them to reach the Impala knuckles and bjs. still figuring out tie rods to account for track width being wider. havent dove into wiring yet but we’re almost there. Edited December 11, 2023 by Donny_olds 94 olds vert, GnatGoSplat, pwmin and 1 other 3 1 Quote Link to comment Share on other sites More sharing options...
bluecalais79 Posted December 10, 2023 Report Share Posted December 10, 2023 You are a very brave man for doing this, all the best of luck with this conversion. 94 olds vert and Donny_olds 2 Quote Link to comment Share on other sites More sharing options...
94 olds vert Posted December 10, 2023 Report Share Posted December 10, 2023 Awesome work! Donny_olds 1 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted December 11, 2023 Author Report Share Posted December 11, 2023 On 12/10/2023 at 6:59 AM, bluecalais79 said: You are a very brave man for doing this, all the best of luck with this conversion. It was hard to start tearing her apart but it had to be done. Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted December 15, 2023 Author Report Share Posted December 15, 2023 (edited) Custom controls arms done which completes the front end, now on to wiring… :’) wiring just about done, and a lil sneak peek at the turbo kit. hopefully will get a first start up later this week Edited January 1 by Donny_olds 94 olds vert, bluecalais79 and pwmin 3 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 4 Author Report Share Posted January 4 Her first start up IMG_1463.MOV primergray 1 Quote Link to comment Share on other sites More sharing options...
Bake82 Posted January 4 Report Share Posted January 4 Great work! Thje first start is always the best! Looking forward to seeing how you finish it all off!! Donny_olds 1 Quote Link to comment Share on other sites More sharing options...
Megavolt-380 Posted January 4 Report Share Posted January 4 is it really that much bigger than the NorthStar? ?? strut tower has not been modified 94 olds vert and carkhz316 2 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 4 Author Report Share Posted January 4 21 minutes ago, Megavolt-380 said: is it really that much bigger than the NorthStar? ?? strut tower has not been modified It must be. my alternator bracket couldn’t even clear the strut tower and water pump bracket hit my frame rail What year GP is that?? Quote Link to comment Share on other sites More sharing options...
Megavolt-380 Posted January 4 Report Share Posted January 4 6 minutes ago, Donny_olds said: What year GP is that?? 1991 model year 94 olds vert, Donny_olds and carkhz316 2 1 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 9 Author Report Share Posted January 9 Little update…. She starts right up and can move in and out of the shop. We still need to tune my tranny and engine some more to get everything right. Radiator, fan, and hoses are on the way and we should be able to get that all in. We gotta drop the cradle one more time to detail and paint my engine bay so everything looks nice and she’ll be nice and purdy 94 olds vert, pwmin, Bake82 and 1 other 4 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 18 Author Report Share Posted January 18 Got cooling system and all accessories on. Having some trouble getting tranny to shift, we used a 4l80 as reference for pinning the harness to the ecu and we can get it into first manually but no luck shifting, any tips?? IMG_1476.MOV carkhz316 1 Quote Link to comment Share on other sites More sharing options...
Megavolt-380 Posted January 18 Report Share Posted January 18 what model year and what engine is the transmission from? Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 26 Author Report Share Posted January 26 On 1/18/2024 at 11:44 AM, Megavolt-380 said: what model year and what engine is the transmission from? Both engine and tranny are from a 2006 ish impala. The tranny is a 4t65 Quote Link to comment Share on other sites More sharing options...
Megavolt-380 Posted January 27 Report Share Posted January 27 7 hours ago, Donny_olds said: Both engine and tranny are from a 2006 ish impala. The tranny is a 4t65 check the transmission connection diagram, 4l80 is very different from 4t65 4l80e.pdf 4t65e.pdf Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted January 27 Author Report Share Posted January 27 11 hours ago, Megavolt-380 said: check the transmission connection diagram, 4l80 is very different from 4t65 4l80e.pdf 110.67 kB · 1 download 4t65e.pdf 113.64 kB · 1 download Our wiring is good, we didn’t use a NSS which is a main difference, other than that they are pretty similar for pinning into the 0411 ecu. We checked through scanner and get all correct high and low pressure through all gears, our problem is we’re not sure if we have it tuned correctly Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted February 18 Author Report Share Posted February 18 Intercooler is installed we had to do some fab work to make it dual pass. Blow off and wastegate installed, just finishing touches and it’s tuning time. pwmin 1 Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted March 11 Author Report Share Posted March 11 Converted my 4t65 to a manual shift now she drives. getting a speedmaster shifter soon. just got to align it and it time to drive and tune her FullSizeRender.MOV pwmin 1 Quote Link to comment Share on other sites More sharing options...
carkhz316 Posted March 17 Report Share Posted March 17 On 1/3/2024 at 7:17 PM, Donny_olds said: Her first start up IMG_1463.MOV It sounds like you have an exhaust leak /s. Anyway, great job and keep the videos and pictures coming. I'm kinda jealous of the turbo aspect, but I don't care to make my Z34 the fastest. I just wanted to do a V8 swap to say I did. Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted March 30 Author Report Share Posted March 30 On 3/17/2024 at 12:49 PM, carkhz316 said: It sounds like you have an exhaust leak /s. Anyway, great job and keep the videos and pictures coming. I'm kinda jealous of the turbo aspect, but I don't care to make my Z34 the fastest. I just wanted to do a V8 swap to say I did. Haha yeah it’s pretty sweet we are still having trouble making boost, got a couple leaks we need to tame. Aiming for just ab 5 psi until we run out of injector and hoping the 4t65 holds up. more videos coming soon once it’s nice out Quote Link to comment Share on other sites More sharing options...
Donny_olds Posted April 12 Author Report Share Posted April 12 Little update, we got it tuned pretty good just having trouble making boost. Fixed a couple leaky intercooler pipes and it takes forever to build boost. Thinking maybe the 2 1/2 is too big for the turbo piping, probably will go to 2 inch. We have cam to put in which will help aswell. More vids coming soon pwmin and 94 olds vert 2 Quote Link to comment Share on other sites More sharing options...
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