ls1junkie

are the throttle bodies the same bolt pattern? is there any difference between the two. im swapping a 5.3 into a jeep and dont have the hood clearance to keep the truck intake, as much as i would like to...

i know about the idler pulley and water pump inlet. whats the word on the fuel fitting interfering with the coil pack? is there an easy way around it or do you have to swap to a f-body pack?

TIA

Black X

iTrader: (9)

I run the Car intake on my 5.3L The throttle body will bolt up no problem. As far as the coil pack goes, I cut 2 1.5" strips of 1/8" thick .5" wide steel and moved the coil pack in question just a tiny bit lower. No problems here.

Gm-LSX

What kind of 5.3? Gen III or IV SBC?
I mean you can't swap the LS1 for an LS2 Intake. Injectorholes and TB are different.
I thought it's the same problem with the new Truck Engines ?!

I intend do swap a (LC9) 5.3 GEN IV into my F-Body. And i need to keep the original injectors.

matt1976

Did you have to replace the fuel rails to do this swap?

onetonk5

what if you have a 06 drive by wire and need drive by cable.....whats needed to swap just the tb?are the computers different from wire/cable?

Speartech

iTrader: (14)

Throttle body, harness changes, computer reprogramming.

cabech984

iTrader: (11)

I do believe you need the LS1 Rail & Injectors to make this work. I believe the 5.3 rail routes a bit different than the LS1/6. Ive been told you can make the 5.3 injectors work but, LS1's are direct bolt in and can be had for fairly cheap.

Gm-LSX

GEN IV or GEN III SBC 5.3?

onetonk5

2006 5.3 i would imagine thats gen3...could i swap an earlier say 2000 5.3 drive by cable intake?

ls1junkie

mine is a 2002 cable tb 5.3l. im not sure what gen that is...

sorry for the delay, this thread completely slipped my mind.

Gm-LSX

That's Gen III

Jones'n

Correct me if I'm wrong, but the only vehicles that came with a Gen IV version of the 5.3 were the front wheel drive V8's which already have car intakes on them.

From Wikipedia
"The LS4 is a smaller 5.3 L (325 in³) version of the Generation IV block. Though it has the same displacement as the Vortec 5300 LH6, it differs in that it has an aluminum block rather than an iron one and it uses the same cylinder head as the Generation III LS6 engine.
A version of this engine is adapted for transverse front-wheel drive application. In order to fit into the smaller engine compartments designed for V-6s, in the front-wheel drive Pontiac Grand Prix GXP, for instance, the LS4 engine block had to be shortened by one inch. Displacement on Demand is also used. Output of this version is 303 hp (226 kW) and 323 ft·lbf (438 N·m).
Applications:
2006-2007 Chevrolet Impala/Monte Carlo SS
2006-2007 Pontiac Grand Prix GXP"