!!!!5.3 Vortec Swap Started!!!!

[sick454]

Originally Posted by eagleuh1

Any updates ? I'm at about this point myself. I've got my engine(2005 5.3 and 4l60e) sitting in frame. Waiting on reply for headers. Still haven't done the fuel tank yet. Got to get headers, make sure they fit and then cut the drive shaft to fit. Would like to see how yours came out on the gas tank setup. LS1Tech.com has a lot of info on the gas setup as far as the corvette filter reg and fittings in their FAQ section. Good luck with yours. Jim

Well I have not gotten very far because of the weather. been really cold here lately. I will be taking alot of pictures and post them when i do the tank and fuel pump set up. Thanks for the luck.

[eagleuh1]

I'm at a stand still on mine now. Ordered the headers but won't be in till next week at earliest.

[Normy71]

Looking good!
Any one have a picture of fuel pressure regulator on there 5.3 I'm not sure if I have one or not?
What did you decide on a trans cooler?

[Shon]

Originally Posted by Normy71

Looking good!
Any one have a picture of fuel pressure regulator on there 5.3 I'm not sure if I have one or not?
What did you decide on a trans cooler?

if your fuel rail has 2 connections then the bigger one is the feed and the smaller is the return, that round thing on the rail is the FPR, if you only have 1 then you do not have a FPR on the rail.

[sick454]

OK, I got all the fittings, hoses and clamps to install the fuel system, except one. I am having a hard time finding one connection. The connection from the Walbro 255 fuel pump outlet. It looks like it has a back flow prevention valve on it. and if i put a hose and clamp on it, it will cover the holes. not sure what the problem would be, but i can't find a connetion for it. ANYONE have any advice?????

[sick454]

Well, It has been a minute since I have been on here. I have some updates. I have all the fuel system installed, transmission shaft was shortened an installed. All the wiring is installed, However it still needs to be cleaned up a bit. Electric fans and transmission cooler are installed. PCM is mounted AND It STARTS!!!! haven't left the garage yet, still need some gauges to monitor a few vitals, and exhaust installed. but here is the motor in its running condition.

I know the wiring needs to be cleaned up a bit and I need the covers for the intake and vave covers. But it RUNS, FINALLY

[FRENCHBLUE72]

Congrats on getting it running cant wait to see some burn outs.

[68GMCCustom]

glad to hear you got it running!

[eagleuh1]

Good deal. Looks good in there. Did you have to notch the frame any to use the exhaust manifolds?

[sick454]

Originally Posted by eagleuh1

Good deal. Looks good in there. Did you have to notch the frame any to use the exhaust manifolds?

I did Notch it a little on the passangers side. but put some plates in fore and aft of the notch to strengthen it alittle.

[Puropedo]

Looks great! Glad to hear you got it running... Can you post some close up pics of where you notch the frame, also what engine mounting plates did you used? Thanks.

[sick454]

Originally Posted by Puropedo

Looks great! Glad to hear you got it running... Can you post some close up pics of where you notch the frame, also what engine mounting plates did you used? Thanks.

Thanks Bro. I have some pictures of the area where I notched the frame on the first page of this thread. I'll take some more this weekend.

As for the plates. I toke some cardboard stuck it to the block traced out the plate. Married it up to the motor mount, then cut it out with a plasma, drille the holes and bolted it all back up. For the other side I just flipped the templete. Pretty easy. I used a 1/4 inch steel plate. Hense the need for the plasma cutter.

Thanks every everyone for the help and congrats. This swap would be alot harder with out this forum!

[sick454]

OK, I need some more help. I installed some universal 4 wire Bosch Oxygen sensors. the problem is I guessed at the wiring(attached). Well I actually used the diagram I got from LS1tech.com. The bosch 02 wires are: two white, one black and one grey.

However since then, my truck is running like crap. It seams to be in LIMP mode. The tranny acts like it is slipping in first and second on the top end of the RPM range right before it shifts. And I get a mild popping from the exhaust now.

Has anyone installed these 02 sensors? How did you connect them? the engine is a 2007 classic silverado 5.3 with the 4L60E tranny.

Now prior to the 02 sensors the tranny was strong and shifted fine, just since then has it gotten this way.

[mcbassin]

Awesome progress! Glad to see you got it installed! thanks for sharing the pictures!

[68GMCCustom]

only one's in my build will be for the a/f gauge(s).

[matthew20061]

Well I can offer some advise I did this swap in my 69' and when I wired it up I plugged the drivers side o2 sensor plugin onto the passenger side o2 sensor and didn't even know I swapped them around! Made it run like crap, miss firing under load and a flashing check engine light. You probably don't have this particular problem but just check your wiring. I'm sure your bosch o2's are fine. Scan the computer for codes and let us know what comes up.

[68GMCCustom]

aren't the universal one's usually only 0v to 1V?

[sick454]

Just drove 480 Miles in my new 5.3 swap and it drove great. I have realized now that my suspension is not up to par with the horsepower and torque the new engine puts out. That's the next project. All this and I got 20 mpg!!!! It did drop to around 17 mpg but I was fighting a 25 mph head wind and had my 750 pound Harley Street Glide in the bed of the truck.

[oldmanlance]

im going to swap my old 402 for a 5.3 ,just wondering about what gaer ratio should u run ?

[sick454]

Originally Posted by oldmanlance

im going to swap my old 402 for a 5.3 ,just wondering about what gaer ratio should u run ?

I'm running 3.72's in my 12 bolt rearend. and it runs fine. fairly stout in the low end and great highway cruising. Definatly not drag raceing ratio by any means. but great for everyday drivers.

[laid67]

Looks good man, im doing the same swap into mine. you ever swap over to a set of headers?

[slamed67]

doug thorley makes a nice set of 5.3 swap headers.. mine just came in the mail today!