jlee29

iTrader: (5)

Hi everyone, I am new to this forum, thanks for reading. I am putting together a parts list and would like an experienced Ls builders advice if I am going in the correct direction. This motor will be going into my Nissan 240sx. I am shooting for around 400 rwhp it will be paired to a M6 (T-56)Transmission.

Bottom End:
5.3 LM7 Iron Block bored to 3.989 (5.7)
I will Replace: Main bearings ($20)
Clevite Camshaft bearings ($20)
Connecting rod bearings ($40)
Forged Flat top pistons and rings (Ls-1) ($600)
Gaskets ($150)
Machine work ($300)
Ls-2 oil pump and chain kit ($350)
Vengeance racing stage 1 camshaft 226/228 .585/.588 114lsa 113icl ($389.00)
I will Re-use: Crank shaft
Connecting Rods

Top End:
OEM 241 Heads
I will Replace: Comp 928 valvesprings ($160)
Comp Push rods ($105)
I will Re-use: All other OEM Head parts

Bolt-ons
Long tube headers ($800)
Cold Air Intake($100)
Tuning at F-Body Central Baltimore, MD

poconojoe

iTrader: (43)

If you're using the 5.3 crank, I hope you're rebalancing it, for the 5.7 rotating assembly

white84z

iTrader: (1)

Don't forget that the head bolts aren't reusable. That's another 50$

sparkwirez06

iTrader: (18)

I'd use katech rod bolts, 199 http://store.katechengines.com/conne...bolts-p25.aspx

jlee29

iTrader: (5)

Thank you, I am getting the crank balanced, I lumped that into "machine work", I will add head studs to my list, those katech rod bolts look nice, I am debating if I should replace used rods with eagle h-beams to match the new forged piston , I don't know if its overkill and worth the extra $ if the stockers are strong enough.... and edit on my cam I am getting the vengeance VRx4.

68 RS Convertible

iTrader: (1)

I'm pretty sure the side bolts for the mains are tty as well as the balancer bolt.

FastKat

iTrader: (10)

It's too bad you can't bore the iron block to 4" to make it a 6.0L. Then you could use L92 heads if you wanted.

I don't know how far you can bore out the 5.3L block... it might be possible.

jlee29

iTrader: (5)

Okay so head bolts, main side bolts, and balance bolts are all tty and need to be replaced. I would just buy a LQ4 block if I was going 6.0 and put my 241 heads (which I have) and raise the compression. The problem with that is its going in a 240sx and correct me if i am mistaken, I am not sure if the accessories will fit the same as a Ls block, I would have to do more fabricating... there are pretty much bolt in kits for a LS motor into 240.

68 RS Convertible

iTrader: (1)

All the other accessory setup's should bolt up to your block. The only difference I know of is the F Body accessories require you to drill and tap one of the holes. I have not done an F Body accessory drive, but from what I have read on this site the truck motors have the boss, but its not drilled and tapped. Keep in mind that each accessory set up has different depths so you cant mix and match balancers and water pump pulley's, etc.

themachasy

iTrader: (5)

I'd either upgrade the rods or get some stock ls1 pistons with new rings, no sense in paying $600 for stuff you don't need.

jlee29

iTrader: (5)

I have done some research on the LQ4/LQ9 and that looks like a great way for me to go, with the money I would spend having the 5.3 machined/re-built, I could buy a low mileage LQ, I will use the LQ shortblock and put my 241 heads on it. VRx4 cam, comp 928 springs, and a tune. I am on the hunt for a shortblock and taking my heads to be cleaned today. I have a spare complete LS-1 motor with 3 broken rods and a hole in the block , thats why I am doing this. FYI

1nasty86

iTrader: (63)

yeah the 6.0 will give you more power for roughly the same amount of money. the poor 240 will not know what to do!