neo01453

iTrader: (2)

I looking to replace my tired 350TPI. Wanting to go big power with a 6.0 Gen III truck block. Wondering if it's better to build one with new parts or just get a good used. Not sure if up grading the internals is worth it. Any thoughts?

five7kid

iTrader: (14)

Most likely a good used one will be fine. They are pretty tough from the factory.

86White_T/A305

You can get alot of power from a stock bottom end 4.8/5.3/6.0 iron blocks with a decent turbo.There are good used parts always being sold or traded on the forums aswell at decent prices if you dont mind holding out for a deal to present itself and build on a budget.

neo01453

iTrader: (2)

I see new or reman bare blocks for sale $500 and up. Thinking if I should build it or just buy a good used engine with all accessories and ect. I see it would be definitely cheaper but wondering if going cheaper am I going to sacrifice alot of HP by not building a motor.

But if I go with a stock used motor should I go with different heads?

Flip 2

iTrader: (1)

Go with a complete engine. $$$$s the other way. You will be in for enough anyway.
Read those answers above again. Nose around the forum. Lots of builds of all stripes... stock to wild.
These aren't like SBCs, much stronger, last longer. Guy down the street has a 2000 C5 (LS1) with 232,000 miles and it runs great.

86White_T/A305

either way you go..at some point of the build you will be spending a chunk of cash. some things will nickle and dime you to death no matter how much you plan ahead.dont rush into anything without doing homework and decide on the complete build.set a goal and stick with it,are you going carb or fuel injected,auto/manual,cruiser or street/strip etc.

i know you said you want big power..define whats big power to you..have you ever driven a big hp car that your ready to own one lol.im not picking on you but alot of guys want 500+hp street cars and cant handle having 380whp.

keep in mind the more hp you make..the more it takes to maintain for long life.what are your thoughts/goals for the car?

neo01453

iTrader: (2)

Think you are right. Parts are expensive. Kind of the reason I've been looking at a truck block anyway. Can't quite swallow paying for an LS2 out of a vette or GTO for $5 to $7,000.

neo01453

iTrader: (2)

I've been thinking about this for some time. Especially since the new camaro came out. I think that 6 cylinder out performs my car. LOL. Not to mention it doesn't feel as if it has enough power to me anymore. I'm really leaning towards a turbo set up with a 6speed behind it. Keep it fuel injected. Just want a really capable street car. My car is purely a car for fun. Bought it back in 05 and put maybe 12,000 miles on it.

86White_T/A305

dont be afraid of going used with the truck motors..alot of us on here run them and when you open them up seeing how good they look in the cylinders..cross hatches still there from factory with over 100 miles,these things are tough.find a motor as complete as possible that will save you the hassle of piecing a harness,accys,ecm etc because buying those parts new are $$$.

if your budget is really tight,drop in a stock 5.3 and workout all the fun of doing an ls swap.it will still make as much if not more than your 350 now..with better gas mileage.then upgrade later as funds are more available.

neo01453

iTrader: (2)

My car is in good running order now. Just got done replacing the intake manifold seals and removing the emissions to clean up the engine bay. I think I'll look for a complete engine with harness and ect. I definitely want to go with a 6.0 though. Pretty much this year I'd like to locate an engine and start putting it together intake manifold and ect. I just never messed around with the bottom end and have no idea what costs are involved with putting one together or how well they are put together in a used engine. Thanks for the input.

86White_T/A305

well ill tell you right now..the things that will make you cry will be buying a 6spd trans as they are sometimes hard to come by at a low price,fbody accys/oil pan if you want the easiest to fit.

look up stock lq4 or ly6 motors with turbos under low boost making decent power 500whp

neo01453

iTrader: (2)

That might be my bigger obstacle with the 6speed. Especially since my car is auto. All the 350 cars were auto but I'm determined to change it over. I saw a guy selling a brand new T56 for $2400. Not sure if it's a deal but I don't need a new one.

86White_T/A305

changing from auto to stick isnt a big deal as it seems.when i did my ls1/6spd swap..i attacked it blind and just read..read alot of swap threads on here and felt confident to tackle it myself and im glad i did.i know my car inside out now than ever before.buy 4thgen clutch pedals..bolt them on,buy the 6spd trans cross member from hawks,get a clutch master..i suggest using a tick master and skip using the stock 4thgen till it blows.it took me longer to cut the hole for the shifter than it did the swap the pedals lol

neo01453

iTrader: (2)

Not sure what you mean by "skip using stock 4th gen till it blows".

All this time I've been keeping an eye out for pedals out of a thirdgen. So I take it the 4th gen are better?

Thanks again for the info.

1gary

The thing that keeps haunting me is as a example a 6.0 LT = 366 c.i. Now I'm all about the LSx engines but it does leave to wonder if I turbo'ed a I gen of the same size I would get the same results or better??. Why is the smaller LSx engines go much better??.

That is a honest newbie sort of question.

86White_T/A305

alot of people upgrade from the stock 4thgen clutch master to something more performance oriented like the tick..its a bit more money but it has improved my shift times.

3rd vs 4th gen pedals is a big debate on here lol.some claim the 4thgens put added stress on the firewall and crack/flex the firewall.i have not experienced this on my car after 2yrs of abuse so i cant say if it happens to everyone with them.the 4thgen pedals work well in my opinion and are easier to find..or buy new.just need to drill the mounting holes bigger and cut off the 4thgen gas pedal and keep the 3rdgen gas pedal inplace.

86White_T/A305

once you add boost to a motor..results can vary..alot.you can make a gen 1 sbc perform as good or better than an lsx..the lsx is just an easier platform to start with to build power.

gen 1 sbc bottom end torque is absent on gen 3's..but a gen 3 topend is nice too.at time i miss my 383 tpi for light to light would eat alot of cars..but once i high open highway..the fun is gone.

some stock 6.0's boosted..which is really inspiring me to add boost:

1gary

The bottom end of the torque in LSx's is then what I suspected if I am reading your right.What is a typical torque curve look like in what rpm range??.And yes I do very well understand there are many variables involved in that answer. I'm just trying to get a feel in what we are talking about.

neo01453

iTrader: (2)

I know what you mean with bottom end torque. I've seen alot of those videos. What inspired me to want to do it was watching horsepower TV when the twin turbo charged a vette. I couldn't believe the power it made.

neo01453

iTrader: (2)

Do the LQ4 and the LY6 engines mount the same as any LS2 engine?

1gary

I'm thinking anytime you want to do a swap,you want to look at both the strengths and weaknesses.I've tried acouple of times to get the guys on here to engage me in a exchange about the torque compares between a 1 Gen and a LSx with both having the same mods.Everyone wants to talk about RWHP in the LSx engines with all of that being in the higher rpm ranges.I mean I'm not driving a street car around at 6 grand all the time.But I am trying to learn about the characteristics of the LSx's.

NemeSS-TyranT

iTrader: (1)

Yes. Same motor mount points.
I reccomend u find a newer ly6 6.0 and run that. with bolt ons and a cam, lot of proven ones out there. 500hp is no sweat.
Forget about the lq motors from the jy, most are excessively used with miles. Unless you plan on rebuilding it yourself. And the price is not much more. They are getting easier to find. Over the lq engines. i have bought/sold many ls motors and i can say from my experience it makes more sense to use a ly6. In december i bought 4 ly6 motors.
Use to be a time when i could get same amount of lqs. But now i may pass em up if they look rough. I cant sell outright. I will have them machined and i will rebuild em with new pistons/rings. Reuse stock rods/crank if useable

NemeSS-TyranT

iTrader: (1)

Best advice i can give is ask someone u may know to give u a ride or let u drive a bolt on or prepped car. Stock is nothing really impressive. Correct cam,tune and bolt ons. Whole nother deal.
Ive let folks drive my car and they have gotten hooked
Of course my car runs 11.70s, but is nothing secret or crazy.
cam,headers,exhaust,fast90/90,tune,ram air,lid,clutch,sfc,common upgrade suspension upgrades,. No weight reduction, cold ac, stereo,etc.gets 25mpg if i dont drive nutzo.
but its nothing out of the ordinary.

neo01453

iTrader: (2)

I don't want to say my car has gotten boring to drive. But the power just isn't there. I think the LY6 is the best bet.

I haven't yet drivin anything we that kind of power. But I know it's what I want.

Thanks for the feed back.

neo01453

iTrader: (2)

Oh by the NemeSS I own property near Victoria Tx. Maybe next time I'm down that way I should look you up in Houston. I'm currently in the army and stationed in Colorado Springs. My car since I brought it up to 6,500 feet seems to lost a significant amount of power. Probably why it's bugging me so bad lately.

1gary

Again a newbie question.What yr/type of vehicle does a LY6 engine come in??.

neo01453

iTrader: (2)

I believe they come most any chevy 2500 07 and up, and comparable vehicles.

NemeSS-TyranT

iTrader: (1)

2007+ 2500 trucks and vans iirc.
6.0 364ci
4x3.622 borexstroke
Floating wrist pin connecting rods
58x reluctor
L92 rectangle port cylinder heads
Gen 4 LS motor, an excellent motor to build off.
A member on ls1tech has gone 9s with a custom cam and stock longblock. Stock unopened longblock. With a carb and supporting parts

cprmn14

iTrader: (3)

On my swap the only problem with the 3rd gen pedals is the pedal sits farther out than the brake and gas pedal. But can be easily delt with. Theres alot of threads about cutting and inch or less out of your clutch master rod, threading both ends, and adding a threaded sleeve between the 2. Then you have yourself a home-made adj. clutch master without spending 200$ or more. Not sure if there are any other benifits to Tick besides being adj. But my stock replacement clutch master from RockAuto feels great!

1gary

As I continue to research this 6.0,I did a search on Car-part.com for a junk listings of that engine.I found pricing's that ranged from $5,500 that included the 6 speed auto trans to $2,050.Am I about right in that costs??. It listed some engines that had a note that said "new style"??. I have also found that the later yrs had VVT. I am guessing that makes cam changes kind of complicated. How are you guys handling that part??.

I am thinking the trannies that are behind the LSx engines are a factor spinning them up fairly quickly to get them up into their power band.