swapping from a NBS 4.3 to a V8

[wkdspd]

Originally Posted by 90-Z71

I have a 90 Z-71 with a 5.7 in it. I have a 400 small block that I want to put in it. Has anyone swapped out one. I am going from throttle body to a carburetor. Does anyone have any recommendations?

this thread isnt your best bet since it is dealing with LS1 swaps, I would recommend starting a new thread to get info on your swap. good luck!

[BigFred8100]

I am not sure how to get Brian's phone number. I am going to do a 6.0 4l80e swap into a 1999 half ton 4.3 4l60e with 3.42's.The donor truck is a 2001 HD2500 2wd .Just have a few questions.I am planning on using all the wiring and pcm from the 2001 Hd.Thanks Hans. Can't wait should be pretty quick.

[DemoN]

Originally Posted by BigFred8100

I am not sure how to get Brian's phone number. I am going to do a 6.0 4l80e swap into a 1999 half ton 4.3 4l60e with 3.42's.The donor truck is a 2001 HD2500 2wd .Just have a few questions.I am planning on using all the wiring and pcm from the 2001 Hd.Thanks Hans. Can't wait should be pretty quick.

Wkdspd would be a great source for these questions too...but it is very close to the 5.7 swap

[wkdspd]

actually, the 6.0 is going to be cake - swap the motor/trans and the entire motor/trans harness at once, and get a custom computer tune to integrate the two with your truck. a fair amount of work, but very straightforward.

wait - is it a NBS or OBS? NBS will be cake, OBS will be a pain...

[DemoN]

Originally Posted by wkdspd

wait - is it a NBS or OBS? NBS will be cake, OBS will be a pain...

Originally Posted by BigFred8100

into a 1999 half ton

[wkdspd]

Originally Posted by DemoN

umm... damn that would be funny, except that you could still find OBS 1/2 tons titled as 99's... ass...

and

[Oh3Silver]

[DemoN]

Originally Posted by Oh3Silver

thanks for your input

[sixsix]

Hello,

I'm working on a 'non topic' Chevy Astro 4.3 V6 enhancement or swap to a 350 V8. Since I've been to just a few topics, I have to ask a couple, maybe obvious ( to all 'cept me ) questions.

What is/are NBS, LS1 & OBS? And is there a place here at FULLSIZE that defines some of the terms - maybe I've been away too long. In a past life, I rebuilt British engines, Ford man. 3 speeds and rebuilt a couple of British cars - was a jet engine mechanic in an even better life.


Thanks in advance,

Mike

[DemoN]

Originally Posted by sixsix

Hello,

I'm working on a 'non topic' Chevy Astro 4.3 V6 enhancement or swap to a 350 V8. Since I've been to just a few topics, I have to ask a couple, maybe obvious ( to all 'cept me ) questions.

What is/are NBS, LS1 & OBS? And is there a place here at FULLSIZE that defines some of the terms - maybe I've been away too long. In a past life, I rebuilt British engines, Ford man. 3 speeds and rebuilt a couple of British cars - was a jet engine mechanic in an even better life.


Thanks in advance,

Mike

this isn't really the thread to ask these questions...but no biggie.

OBS= Old Body Style. it's FSCism for the 89-98 model trucks.
NBS= New Body Style. It's FSCism for the 99-02 model trucks.
LS1= the 5.7L 98-02 corvette/firebird/camaro engine
LSx= the family of LS1 based engines. the 4.8L, 5.3L, 5.7L, 6.0L, and 7.0L.

[10,5 FreeFall]

I'm looking to swap the ls1 into my 98 1500c 4.3l, and was wondering if any one knows if I need different motormounts for this OBS. And if anyone has any pointers, feel free to let me know.

[trtturbo]

Yes, you will need adapter plates, but thats it.

[wkdspd]

well, thats not IT, but its all you'll need to mount the engine - the adapters can be had from Street and Performance. depending on accessory setup, there may also be mods to the k member that will need to be done. once laid in place the wiring can be done as a standalone with any of a dozen wiring packages available, or integrated into the stock setup with a large amount of work, or converted into a standalone with a fair amount of mods to the stock harness. regardless of wiring decision, you'll need the appropriate ecm flashed to accept the chosen scenario.

[trtturbo]

I meant "it" as far as getting the motor bolted in, not anything else.

[wkdspd]

Originally Posted by trtturbo

I meant "it" as far as getting the motor bolted in, not anything else.

I also didnt mention to keep in mind the necessary fuel upgrades and full exhaust that will have to be run.

[COOKOOBIRD]

One day while coming home from the garage after tuning my 507 c.i. hemmy out, I spotted a lion in the weeds. It was no ordinary lion, but one with teeth. So after I petted it, I left. The the next day, I went back to the garage and was going to put airbags in my suspension. Cause I know a lot of people in Hollywood who told me it's cool to do that. But then I thought, well I need to go help out some guys on the fullsize forum. So I'm here, anybody who needs help, just ask away.

[DemoN]

Originally Posted by COOKOOBIRD

One day while coming home from the garage after tuning my 507 c.i. hemmy out, I spotted a lion in the weeds. It was no ordinary lion, but one with teeth. So after I petted it, I left. The the next day, I went back to the garage and was going to put airbags in my suspension. Cause I know a lot of people in Hollywood who told me it's cool to do that. But then I thought, well I need to go help out some guys on the fullsize forum. So I'm here, anybody who needs help, just ask away.

you're a moron

[Colby 04]

Originally Posted by DemoN

you're a moron

that's an understatement

[cabech984]

I have a few questions regarding a 4.3 to 5.7LS1 swap. I have a totalled 99 Z28 with all the accesories. If I use the PCM from the camaro would I;

1 Be able to use Camaro harness?
2 have to re-tune the engine?
3 If I use ls1 intake man, could a 4.8/5.3/6.0 intake bolt in?

I read the post but am still a little confused on what is needed to swap this truck I know I need;

engine
exhaust
mounts

what else would I need? sry if I missed something on the post that was already said.

[wkdspd]

your swap is a hair different than the others posted, but pretty close. you can use the entire engine/harness/computer from the z28, but you will still have to go through the wiring and remove several things your setup wont have, and rearrange several items to work with your truck. if you are wanting to use the factory gauges that will also take some custom wiring to mate them to the harness you already have; if you are going to use aftermarket gauges then you will just use the factory harness to run the engine/trans only and make the modifications from there. you will need of course all new exhaust, an electric fan setup, new throttle setup, completely redone fuel and a/c lines, possibly a new adjustable/return style fuel rail depending on whether or not your engine has one already, and new motor mounts, but S&P I believe makes the adapters and rail you need. last but not least, the computer will need to be adjusted for the mods you make to the harness, to delete any systems you remove, and to adjust the speed/shifts for whatever gearing you have in the truck. lengthy swap, but well worth it IMO.