Please close mods

[Bowtieheart]

Re: Lt1 vs Ls1 cost and power (In details)

And wouldn't a 5.7 TPI with thishttp://www.jegs.com/i/Weiand/925/75 ... tId=760002 and mild cam with maybe ported heads/vortec heads be pretty much a LT1 but better?

 

[pencero]

Re: Lt1 vs Ls1 cost and power (In details)

b / d body car are PFI stock and won't require additional wiring. Why would you want to do extra work? :wink:

 

[DRIVEN]

Re: Lt1 vs Ls1 cost and power (In details)

Your Jegs link doesn't work so I don't know what you're referencing. TPIs, in general, run out of breath at about 4500rpm. They make great cruisers and have a nice low, broad torque curve. I don't know why GM never used them in light truck applications.

So Driven, if you were in my shoes, what would you do and why?

That's really not my call. If mid 12s are your primary goal, I'd probably go LS. More potential and bigger aftermarket support. More expensive though.
If budget and ease of install is the priority, I'd go LT1. More than enough power to get you in trouble. You'll need a cam and either aftermarket heads or major work to stock heads to get to your target ET. You could always stroke it. Wouldn't be too expensive (relatively speaking) to add a 383 crank/pistons.
The buy-in seems to be regional. In my area LT1 are pretty cheap and plentiful. Everyone seems to think LSanything is gold plated. Not sure where you live so YMMV.
Cosmetically speaking, I think the LT1 wins. As well as the LS runs, the aren't very pretty. They can be -- but it ain't cheap. This is the latest one I did in my brothers pickup last year. Totally stock with a set of $20 valve covers.

 

[online170]

Re: Lt1 vs Ls1 cost and power (In details)

So which is more cost effective for a mid 12's street/streetable car? No turbo/nitrous/supercharger.

viewtopic.php?f=13&t=38921

This is my brother's car. He drives it 2 hours to race with passengers, and trunk carrying tools. Runs mid 12's and drives it home. He also takes it to work regularly, and it will sit in rush hour traffic all day long without overheating. Uses mostly "recycled" sbc parts. 700R4 and a lock up converter keep the fuel mileage manageable. About the same as a 1/2ton truck.

Cant build an LS for that price, that's for sure.

 

[maven]

Re: Lt1 vs Ls1 cost and power (In details)

Cant build an LS for that price, that's for sure.

Or an LT1 😉

The only potentially significant cost difference between the LS and LT engines is going to be the ability to use off the shelf SBC exhaust. PAcesetter LS1 headers are well documented to fit an LS into a G but do require some modifications to the headers. Youll also need a new oil pan if you get a corvette engine, or dont want the pan hanging below crossmember if you use a truck engine. The LSA oil pan and pickup is $175-225 online.

Decided if aesthetics matters to you...decide which one looks better.
Search locally to you for LT1s, and for 5.3/6.0/LS1s, compare prices.
Decide if you have any preference......LT1 gets more love from the SBC guys, and LS guys tend to get hazed a little bit when they talk about what is "better" about the new engines :lol:

In the end though, its hard to argue against the fact that 5.3/6.0/LS1 would make more power right out of the box than an LT1.

 

[maven]

Re: Lt1 vs Ls1 cost and power (In details)

Cant build an LS for that price, that's for sure.

Or an LT1 😉

The only potentially significant cost difference between the LS and LT engines is going to be the ability to use off the shelf SBC exhaust.(which means more used options, quality exhaust is expensive for either setup) PAcesetter LS1 headers are well documented to fit an LS into a G but do require some modifications to the headers. Youll also need a new oil pan if you get a corvette engine, or dont want the pan hanging below crossmember if you use a truck engine. The LSA oil pan and pickup is $175-225 online.

Decided if aesthetics matters to you...decide which one looks better.
Search locally to you for LT1s, and for 5.3/6.0/LS1s, compare prices.
Decide if you have any preference......LT1 gets more love from the SBC guys, and LS guys tend to get hazed a little bit when they talk about what is "better" about the new engines :lol:

In the end though, its hard to argue against the fact that 5.3/6.0/LS1 would make more power right out of the box than an LT1.

 

[online170]

Re: Lt1 vs Ls1 cost and power (In details)

For a modest goal like mid 12's, an LS1 seems like a waste of money.

 

[Bowtieheart]

Re: Lt1 vs Ls1 cost and power (In details)

The Jegs link was to a Stealth Ram intake for tpi. I've been reading that the Lt1 is pretty much a tpi motor with better heads, cam and intake. And I'm sure I can pick up a Tpi motor for under $400 probably even with the harness. I just want something that gets better than 13mpg city, runs in the 12's and doesn't sound like it's going to shut down because a huge cam. I know either route isn't going to be extremely cheap but my question is which is the cheapest and easiest? As far as the tpi goes, it should also be a direct drop-in and people have hit 12's with gears, full exhaust, cam, intake and tune. That list should be cheaper than Ls swap when it's all said and done right?

 

[online170]

Re: Lt1 vs Ls1 cost and power (In details)

The Jegs link was to a Stealth Ram intake for tpi. I've been reading that the Lt1 is pretty much a tpi motor with better heads, cam and intake. And I'm sure I can pick up a Tpi motor for under $400 probably even with the harness. I just want something that gets better than 13mpg city, runs in the 12's and doesn't sound like it's going to shut down because a huge cam. I know either route isn't going to be extremely cheap but my question is which is the cheapest and easiest? As far as the tpi goes, it should also be a direct drop-in and people have hit 12's with gears, full exhaust, cam, intake and tune. That list should be cheaper than Ls swap when it's all said and done right?

That Era of LT1 is also not very valuable for some reason. It is basically a TPI motor, but you can run about 11:1 compression with iron heads because of the reverse cooling. Possibly higher with aluminum heads.

I have seen quite a few "383" built up engines sell for next to nothing.

 

[maven]

Re: Lt1 vs Ls1 cost and power (In details)

No fuel injected engine is going to be a "drop-in"

The only thing harder about the LS style engine is that if you want to keep costs lower by avoiding the BRP mounts/headers youll need to run shorty headers/manifolds or modify Fbody headers. None of this "hard" really, its just not LEGOs

As far as cheap goes.....like I mentioned the only true additional expense on an LS engine is the oil pan if you need one.Everything else is comparable between the two. you can run $200 headers without modification on a Gbody, they just wont be long tubes.

As far as the 12's in a TPI with thos mods...its been done, but a cam in a 6.0 will get you deep 12's if not 11's. (when compared to the same chassis setup of a 12second L98/TPI car)


If you need or desire LEGOs, go with a TPI/LT1 motor, if youre looking for the most fuel injected power possible reliably on a budget...get a Gen3