jonus079

i just realized this is in the wrongs section. It should be in the gen 3+ section. woops

things have changed big time. you guys may have see my other posts but heres what i decided to do. I went and took the complete rear subframe/suspension from a 2003 Lexus is300. Its good to know i will never have to worry about the rear end giving out. I also went with the front suspension from a Lexus sc400/ Toyota mark 4 supra, so i ended up cutting out all the work i did with the custom motor mounts. I did get all the floors done and I'd like to have the car painted by March.

heres how mine worked out it a 5.3l with 5.3l accessories but it has an ls1 intake.

it an 8 inch wide wheel. well i think the car should feel more planted at cruising at high speeds and when cornering however this is all theoretical. i am sure the factory sc400/sc300 brakes will be a huge improvement over the factory 240z brakes and likely as good as the expensive after market brakes for the 240z. it surprising how thick these rotors are. i was also playing with the idea of using the abs from the sc300 but im not sure it will be worth it. haven't decided what flares im going to use yet but the zg flares are looking good. i really didn't want to use any flares but between the sc400 front end and the is300 rear end there really no opinion for that. to be honest i cant remember lol. i narrowed it at the beginning of the summer then i didn't touch the car until about three weeks ago. i think it was about 3-4 inches.

here is mine so far (what a mess that garage is). looks like i will need flares. i looks like the camber is off but its really not. i just cant bolt down the wheels tight cause i dont have the right lug nuts. keep in mind its also set for the middle setting so i can take away or add camber.

funny you ask because after not so much as going in my garage for the past three months, just 4 days ago i started working on it again. here some pictures i took today. now that summer is over ill be doing alot more work on the car in the coming months. ill keep you guys posted. here are the rear supports firmly welded to the cars frame and the overall cradle mounted to the car im hoping to finish up the welding the rear before the end of the week. i have alot of work still to do to the front. id like to have the car right side up in another couple weeks so i can start the body work. -Marcus

from what ive seen the automatics have 3.909. ill open my differential some time and check. ether way since im running a t56, i should be doing 80mph at about 2.2k rpm in top gear.

here are a few better pictures. still waiting for argon to weld. if you would like to see larger pictures click on the link in my sig. the shock should fit with no problems

Thanks for the positive feedback! unfortunately this rear end doesn't have an lsd diff but at $260 for the entire setup, i can hardly complain. It looks like there are a few after market company's that make lsd's for around $700-$1200. I dont know much about the front suspension on the is300. The one i pulled the rear out of had the front pretty much cut off from an accident so i couldn't really get a good look at it. BRAAP: I didn't realize the 300zx also had a cradle. I never really looked into it. I'm glad to hear someone agrees with me about the rear end especially with all the diagrams, observations, and facts you illustrated. Up until now it was pretty much theories in my head. I'm hoping to get a lot more work done Tuesday and Wednesday. I will post more pictures with the car flipped over so you can better see how im connecting it to the unibody.

i dont know much about the 300zx rear but its my understanding that its not modular, that is the control arm connect into the body. the only 240sx rear ends i could find had 4 lugs which i wanted to get away from. not only that but i was never really impressed by the geometry of that set up. it just doesn't look like the best design to me when compared to is300 rear end. the only reason why i was even considering the sc300/400 rear end is because i'm using the front end. ive seen people put alot of power through the is300 rear end and it appears to be very sturdy. anyway i did alittle cutting and got it roughed in today. it looks pretty good. unfortunately my tig welder is out of argon and i cant get anymore until Tuesday so i guess it will just sit there until then. i really wish i had a wheel to test fit.

so after alot of thinking and research i had my list narrowed down to two rear ends: lexus is300 and lexus sc400/300. well today i went ahead and pulled the complete rear end out of a 2004 lexus is300. in the end i choose it because the sc300 was so much wider (about 6 inches). ive also seen people put huge numbers down through the is300 rear end with supra engines. i mached it up and it looks pretty damn good. there is about an inch from the hub to the outside of the rear fender so it looks like ill be running small flares. i dont mind this but i really want to use the smallest flares possible. tomorrow i plan on putting the cars back on the rotisserie to get a better idea of how it will come together. just thought i would share some pictures.

im also using the rear end. from what ive seen the suspension is identical to the mkIV supra. The only diffrence i could see is that the supra has larger cooling fins on the differential cover. the control arms/ subframes seem to be the same.

i dont plan on adding any flares.

I got it from a friend's junk yard and he game me a deal that i can publicly announce. But I could use my insider status and get another with everything pictured for around $400, $450 with both struts.

yea they are. i was looking at a couple at the junkyard yesterday and they are the same. i ended up picking one out of a sc400. anyone else know of someone doing this swap or completed it?

im also interested in knowing the size of those wheels

...I can't wait to take that first test drive.....

i looked over the engine protection and abuse management and i don't see anything else that would shut down the engine. however keep in mind that anyone with the software can change the protection time. maybe its possible they did this when they removed vats? as for the oil pressure sender, the parameters i saw were onlyt used to trigger a warning light. i may have missed something but when you hot wire the pump does it continue to run properly??

its good to know there are people who really know there stuff on these forums.

my mistake. its actually 409 seconds before shut down at factory settings. hopefully that helps.

so the ecm is shutting down the fuel pump?? sounds to me like over heat protection. perhaps the coolant temp sensor is bad?? anyway the factory setting with a 2002 camaro ecm is 140 seconds, about 2 mins. there is also a delay before you can restart the engine. time it and if its the same then its in protection mode.

ok i checked again. there are 5 tan wires. 1 for the oil pressure sender like you said and 1 for each o2 sensor. my harness still has all 4 o2 sensors connect. im only going to be running 2 o2 sensors so ill take sensor 2 off each bank. i wont be using the stock oil pressure sender also. now that i think about it that will only leave me with 2 tan wires so i might as well trace them back to the pcm and connect them to the right port. i think the way it is currently wired is fine but it pretty easy to trace back 2 wires so why not...

well first off i bought a harness that was modified for stand alone use over a year ago. i cant remeber what company made it but it looked very professional. it was for an automatic tranmsision but it was so cheap i couldnt pass it up and i figured i could just remove the automatic transmission wires except for the speed sensor. yesterday and today i began to take out the automatic wiring and so far so good. now im begining to shorten some parts and lengthen others to make it fit more cleanly in the engine capartment ment. my question: its seems like whoever modified the harness simply spliced all the tan wires (senor grounds) together and then from there ran wires off to individual sensors. is this ok? or should i trace the ground back to the pcm (what a huggggge pain that would be)? i wouldn't think it matters as they are all just grounds for the sensors.

heres the downpipe so far. there is still alot of welding to do as you can see but im out of argon and roberts oxgyen isnt open on sunday. remember its a 3 1/2 inch downpipe so its very tight but it all fits. sorry for the dark pictures, my shop light is burnt out and i dont have any bulbs for it.

agreed. btw this down pipe is getting crazy. talk about alot of turns..... ill post some pictures when its finished.