Difference between LS3 and LT1 - Page 7

ChevyRules · 08-22-2016, 10:27 AM

Quote:

Originally Posted by aestil

The A8 and M6 are not actually the LT1 though. The Corvette has AFM in both manual [M7] and automatic transmissions.

So one of the differences between the LS3 and LT1 is that the LT1 has AFM.

So what engine does the M6 have then?

To my understanding, the manual Camaro SS's LT1 has the hardware for AFM, but it is just simply disabled.

SSDan · 08-22-2016, 11:30 AM

Quote:

Originally Posted by SSNYSTR

If the LT1 is direct injection, what is the L99/LS3 considered?

Port injection which is where the injectors sit upstream from the valves in the intake manifold just in front of the intake ports in the heads.

Direct injection is where the injector sit inside the cylinder combustion chamber between the valves. Thus the fuel is "directly" injected into the combustion chamber at or near TDC (top dead center) as the piston is finishing the compression stroke and the spark plug fires.

SSDan · 08-22-2016, 11:34 AM

Quote:

Originally Posted by ChevyRules

So what engine does the M6 have then?

To my understanding, the manual Camaro SS's LT1 has the hardware for AFM, but it is just simply disabled.

I believe you have that right. Its the same LT 1 engine whether the car is an A8 or M6. On the A8 the AFM hardware is active and on the M6 the AFM hardware is there but does not engage for cylinder deactivation.

aestil · 08-22-2016, 11:47 AM

Quote:

Originally Posted by ChevyRules

So what engine does the M6 have then?

To my understanding, the manual Camaro SS's LT1 has the hardware for AFM, but it is just simply disabled.

That's exactly my point. The engine is the LT1 in the base Corvette and all Camaro SS's. In the Corvette both transmission choices come with AFM, but in the Camaro only the A8 has the AFM.

I was only saying that it is a feature of the engine whether or not the transmission has the electronic capability to make use of it.

1LE801 · 08-22-2016, 11:56 AM

Having owned both a cammed LS3 and a stock LT1: Just based on performance, LT1 is better in every way.

SSDan · 08-22-2016, 12:04 PM

Quote:

Originally Posted by 1LE801

Having owned both a cammed LS3 and a stock LT1: Just based on performance, LT1 is better in every way.

I agree as I have owned a cammed LS3 and now the LT1. Other than missing the awesome sounding chop at idle from my old cammed LS3 - I like my new LT1 much better. The long flat torque curve of the LT1 with 455 ft. lbs at peak make this a great engine paired against the gearing choices in the M6.

crankaholic · 08-22-2016, 12:19 PM

I'm a little late to the thread... but the only thing that really matters:

For some reason official GM dyno charts start and end at different RPMs, but you get the idea and you can see the LT1 is still building power when the LS3 already dropped off.

iPODFAN11 · 08-22-2016, 12:34 PM

Quote:

Originally Posted by aestil

The A8 and M6 are not actually the LT1 though. The Corvette has AFM in both manual [M7] and automatic transmissions.

So one of the differences between the LS3 and LT1 is that the LT1 has AFM.

Wut. A8 and M6 both use the LT1. M6 the AFM is not active. LS3 is a Gen 4 small block, LT1 is a Gen 5 small block. Between Gen 4 and Gen 5, there is some bolts, and a couple odd pieces that are carried over from 4 to 5. TR6060 with the Camaro is why it doesn't have AFM, but the A8 does. TR6070 doesn't package in Alpha chassis.

The service new replacement part numbers are THE SAME for A8 and M6 Camaro for the LT1. Its just a software calibration that makes the difference.

mt3130 · 08-22-2016, 12:55 PM

That torque curve is a thing of beauty.

aestil · 08-22-2016, 03:54 PM

Quote:

Originally Posted by iPODFAN11

Wut. A8 and M6 both use the LT1. M6 the AFM is not active. LS3 is a Gen 4 small block, LT1 is a Gen 5 small block. Between Gen 4 and Gen 5, there is some bolts, and a couple odd pieces that are carried over from 4 to 5. TR6060 with the Camaro is why it doesn't have AFM, but the A8 does. TR6070 doesn't package in Alpha chassis.

The service new replacement part numbers are THE SAME for A8 and M6 Camaro for the LT1. Its just a software calibration that makes the difference.

What is so hard about what I'm saying. Yes obviously the M6 or A8 use the same enigine.

Here's what happened, someone mentioned that the LT1 had AFM and the LS3 didn't.

Someone ELSE said 'yeah but the M6 doesn't get the AFM, only the A8'.

My point was the transmission has nothing to do with the engine. The question was 'what is different between the LS3 and LT1', and if we start talking about transmissions as part of that conversation, then we might as well include the available differentials and suspensions, etc.

Nothing I said in any of my posts is wrong, yet people keep quoting them and 'correcting them' saying the exact same thing I said in my posts.

I am so confused.

edit: I am curious about the TR6070, this is the first time I've read anyone saying that about the packaging problems, and I have always wondered about it. Is the TR6070 specifically designed to be installed in a transaxle setup? Or is there just more space in the Corvette? I assumed they didn't put it in the Camaro to keep some differentiation between their top sports car and lower tier sports car. Your post indicates that is incorrect.

Looking for any more info on that. Thanks!

Marine Corps · 08-24-2016, 02:09 AM

Very impressive tech talk. These kind of posts remind me of why I belong to Camaro6 forum.

out4lox · 11-18-2016, 10:37 PM

Danss24, to answer your question, above:

I believe Ford dropped the 302/5.0 motor from the Mustang GT in '96, in favor of the 4.6 liter "modular" motor ... I think they called it. Power went down from something like 225 hp to around 215, if I recall correctly.

Indeed, I had a '95 Mustang GT for a couple of years: Replaced it with a beautiful new '98 Z28 when that year's model came out, with the groundbreaking, all aluminum LS1 power-plant making 305 HORSEPOWER!

I still have that bad boy sitting in my garage, right next to my brand new, '16 Blue Velvet Camaro 2SS with the new LT1 -- which i think is the THIRD small block to be so designated.

Indeed, before i had my '98 Z28 with its LS1, and way, way before my new Camaro SS with the LT1 arrived, I owned a '92 'Corvette, with the then-second small block to have been labeled as the "LT1." It made 300 HP, and was considered quite the hot dog for a stock car at the time.

So among others, I've had two LT1s -- the second and third motors so designated -- along with the last Ford 302/5.0 they made ... well, until the 5.0 DOHC (right?) "Coyote" motor came out. AND I had the pleasure of owning the 5.7 "Hemi" in a Dodge Charger R/T, which I just replaced with the (wonderful) 2SS Camaro.

I felt love of some sort for each of these cars, EXCEPT FOT THE 'STANG. Sorry, Ford guys. I love Chevrolet. I can also be a Dodge Man, Dodges can be dead cool and I accept them. But Mustang? Again, sorry....

out4lox · 11-18-2016, 10:55 PM

i have -- STILL HAVE -- a '98 Z28; it was the inaugural year of the LS line of motors that continued proudly, I believe, until the recent advent of the new (and third) LT1. This first-ever LS motor in my Camaro never used any appreciable amount of oil. Never, not in over 220k miles. Maybe hard for some of you to believe, but true. (I aways used full synthetic FWIW....)

c4racer · 11-18-2016, 11:48 PM

yup - my second LT1 as well. I had a '69 Camaro pro-touring car with a C4 based front clip and a 94 Corvette LT1 with hot cam and long tube headers. Made around 380hp or so. Wasn't all that fast, but at least was a light car. Sounded fantastic at idle tho!

The first LT1 was a solid cam 350 making I think 370hp (old gross rating scale) in the 1970 Corvette. It was also available in the Z/28 starting in 1970. Great motor, but very much old school! I also think it was technically slated the LT-1

Lots of great motors from chevy over the years, and they just keep getting better!

08-22-2016, 11:56 AM	#89
1LE801 "Lohla" Drives: 2016 1SS A8 :"Lohla" Join Date: Dec 2013 Location: Utah Posts: 711 View My Garage	Having owned both a cammed LS3 and a stock LT1: Just based on performance, LT1 is better in every way. __________________ OG Trans and Diff but all else is upgraded. Twins bring wins ;-)

08-22-2016, 12:19 PM	#91
crankaholic Drives: 2016 Camaro 2SS Join Date: Dec 2015 Location: Philadelphia Posts: 771	I'm a little late to the thread... but the only thing that really matters: For some reason official GM dyno charts start and end at different RPMs, but you get the idea and you can see the LT1 is still building power when the LS3 already dropped off. __________________

08-24-2016, 02:09 AM	#95
Marine Corps Drives: 2016 2SS Garnet Red Camaro Join Date: Aug 2015 Location: San Francisco Bay Posts: 840	Very impressive tech talk. These kind of posts remind me of why I belong to Camaro6 forum. __________________ Ordered: 8/8/15, 2SS Garnet Red Built: 10/14/15 Current: Took Delivery, 12/24/15 Added Procharger supercharger.

08-22-2016, 12:55 PM	#93
mt3130 Drives: Coupeless :( Join Date: Jan 2015 Location: SWFL Posts: 980	That torque curve is a thing of beauty.

11-18-2016, 10:37 PM	#96
out4lox Drives: Blue Velvet 2SS, 8A, No Options Join Date: Nov 2016 Location: South Florida Posts: 57	Danss24, to answer your question, above: I believe Ford dropped the 302/5.0 motor from the Mustang GT in '96, in favor of the 4.6 liter "modular" motor ... I think they called it. Power went down from something like 225 hp to around 215, if I recall correctly. Indeed, I had a '95 Mustang GT for a couple of years: Replaced it with a beautiful new '98 Z28 when that year's model came out, with the groundbreaking, all aluminum LS1 power-plant making 305 HORSEPOWER! I still have that bad boy sitting in my garage, right next to my brand new, '16 Blue Velvet Camaro 2SS with the new LT1 -- which i think is the THIRD small block to be so designated. Indeed, before i had my '98 Z28 with its LS1, and way, way before my new Camaro SS with the LT1 arrived, I owned a '92 'Corvette, with the then-second small block to have been labeled as the "LT1." It made 300 HP, and was considered quite the hot dog for a stock car at the time. So among others, I've had two LT1s -- the second and third motors so designated -- along with the last Ford 302/5.0 they made ... well, until the 5.0 DOHC (right?) "Coyote" motor came out. AND I had the pleasure of owning the 5.7 "Hemi" in a Dodge Charger R/T, which I just replaced with the (wonderful) 2SS Camaro. I felt love of some sort for each of these cars, EXCEPT FOT THE 'STANG. Sorry, Ford guys. I love Chevrolet. I can also be a Dodge Man, Dodges can be dead cool and I accept them. But Mustang? Again, sorry....

11-18-2016, 10:55 PM	#97
out4lox Drives: Blue Velvet 2SS, 8A, No Options Join Date: Nov 2016 Location: South Florida Posts: 57	i have -- STILL HAVE -- a '98 Z28; it was the inaugural year of the LS line of motors that continued proudly, I believe, until the recent advent of the new (and third) LT1. This first-ever LS motor in my Camaro never used any appreciable amount of oil. Never, not in over 220k miles. Maybe hard for some of you to believe, but true. (I aways used full synthetic FWIW....)

11-18-2016, 11:48 PM	#98
c4racer Drives: 2016 SS Convertible Join Date: Sep 2016 Location: California Posts: 1,108	yup - my second LT1 as well. I had a '69 Camaro pro-touring car with a C4 based front clip and a 94 Corvette LT1 with hot cam and long tube headers. Made around 380hp or so. Wasn't all that fast, but at least was a light car. Sounded fantastic at idle tho! The first LT1 was a solid cam 350 making I think 370hp (old gross rating scale) in the 1970 Corvette. It was also available in the Z/28 starting in 1970. Great motor, but very much old school! I also think it was technically slated the LT-1 Lots of great motors from chevy over the years, and they just keep getting better!

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