mightymouse383

Well after selling my t56 and buying a used th350 and then rebuilding it, I ran a 12.20 @ 114 mph with a 1.89 sixty on DR's.

My best pass with the t56 was 12.60 @ 113 mph with a 1.98 sixty. I will get slicks next and try for a better sixty!

Mystery Bird

Always nice to improve and go faster, congrats. Do you have a higher stall converter in the TH350?

mightymouse383

Yes I have a higher stall, Its a Art Carr 3800. I hope to soon go a little faster, the tune is a little rich with AFR's at 11.9 at WOT, I am going to lean it out and see if I can get a 1.6xx sixty and hope to run 11.80's to 11.90's @ the 115 to 116 mph range......Let me know if that it wishing for too much, lol

Mystery Bird

If you can get that 60 down to a 1.6 that should definately be in the 11's. Good luck.

mightymouse383

Hey Mystery Bird, can I ask what mods u have? engine size, heads ect.....Just trying to see where I stand aginst other cars...thanks

Mystery Bird

Old setup is in signature, stock internal LT1, home ported heads, XFI 280 cam, Edge 3600 stall, 3.73 gears, LCA's, SFC, and all the bolt-ons.

mightymouse383

Headed to the track tonight, hope for a better 60', will post slip later.

mightymouse383

Best pass I could manage was a 12.4 @ 115 with a 2.1 60'.....well at least I cut a .003 light...lol

96LT1TX

I had to get some hoosiers to get any decent 60's but I think we are pretty close on the ET. Without the nitrous im at 12.1@115 with a 1.72 60'. Pretty sure there would be 11s without the nitrous but I cant get any better than 1.68 or so without the nitrous. I always see others at the track running 11.8s@115-116 but I just couldnt get it right.

LT10s

Hey man glad to see you made an improvement. I am just about finishing up my swap from the t56 to th350 with about the same size stall. The car went around 11.6s @ around 118 and hoping to improve. Much like you the real reason for doing it is to make the car consistent. I did have one question what did you do about the vehicle speed sensor? This is where I am having some difficulty because my car set the VSS code and will not idle and I need to figure out what I am going to do about this. Any help in this area will greatly appreciated.

mightymouse383

OK, I did a little trick. I deleted my ABS about a year agao when I still had the T56, when I installed the th350 I ran the vss harness and spliced it in to the front right abs wheel sensor. I then used tunercat to program the speedo until it was accurate. Really easy and pretty much free.

mightymouse383

You might need to idle the car up a little seeing how it is a auto now. Also u need to stay with the t56 tune, if not u will have a ton of codes for the 4l60e.

If you have any more questions let me know, also the car is way faster with the th350. I ran a 12.1 @ 113.60 mph with a 1.76 sixty on a 28 inch drag click in 95 degree weather. I think with some good air the car will run a 11.90 or a 11.80

T/A lt1

You guys need to work on the 60's and tuning. My old 355 with Le1 cam/le ported heads ran 11.60@116mph with factory 3.42's in the 10bolt. I ended switching to a Cc306 and got it down to 11.24@120mph with tuning and suspension on motor with only 355ci.

mightymouse383

Best new pass on N20 150 shot 10.800 @ 126.57 mph with a 1.52 60'

T/A lt1

Nice, should only get quicker from here on. I have a great Vigilante converter for Th350/th400, sent it in when I pulled my engine out to get freshened up. I have since decided to go turbo LS and I have to start over with stall converter and I'm looking to make somebody a good deal on this Precision Industries converter. My 383 ran 10.80's on motor and on 100 n20 went 9,91@137mph. Lmk