LT1 vs LS1

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Jun 14, 2014 | 01:29 PM

1 Slow WS6

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A fun comparison of my cars a few years ago. 93 z28 1.6 rr, under drive pulley, arizona speed and marine headers, cat delete, magnaflow catback, air foil, light weight flywheel . 2001 WS6 catback and lid. Both M6 red:lt1 blue:ls1

Last edited by 1 Slow WS6; Jun 14, 2014 at 02:57 PM.

Jun 14, 2014 | 01:43 PM

LIL SS

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Scaling is off between the two pulls. Neither one of them have HP/TQ crossing at the same RPM let alone 5250rpm where they should. Would be nice to see once that is fixed.

Jun 14, 2014 | 02:00 PM

1 Slow WS6

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Quote:

Originally Posted by LIL SS

Scaling is off between the two pulls. Neither one of them have HP/TQ crossing at the same RPM let alone 5250rpm where they should. Would be nice to see once that is fixed.

Good catch, I thought it looked weird. Rescaled

Jun 14, 2014 | 02:45 PM

hrcslam

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Which one is which? Red LT1? Blue LS1?

Jun 14, 2014 | 02:58 PM

1 Slow WS6

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Quote:

Originally Posted by hrcslam

Which one is which? Red LT1? Blue LS1?

Correct!

Jun 15, 2014 | 06:30 PM

Mikey 97Z M6

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I used to hate working on my old LT1, but I still think a cammed LT1 sounds better.

Nice comparison. The ol' LT1 had some grunt down low.

Mike

Jun 15, 2014 | 07:15 PM

MonmouthCtyLS7

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Quote:

Originally Posted by Mikey 97Z M6

I used to hate working on my old LT1, but I still think a cammed LT1 sounds better.

Nice comparison. The ol' LT1 had some grunt down low.

Mike

Back when I owned my LT1's in the later 90's I thought they sounded better but as soon as I cam'd my LS1 w/ a LM1 CB that all changed...as for the "grunt" the LS was still faster just much smoother....

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Jun 15, 2014 | 09:00 PM

z-maro

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Nice comparison, it would be cool to see if the LS1 would get above the LT across the board if it had similar mods.

Quote:

Originally Posted by Mikey 97Z M6

I used to hate working on my old LT1, but I still think a cammed LT1 sounds better.

Nice comparison. The ol' LT1 had some grunt down low.

Mike

Quote:

Originally Posted by 1 Slow WS6

I agree the LT1 does sound better and had ***** down low.

I think (hope) the LS would be equal or above down low if it also had LT's, and a UDP (not to mention higher ratio rockers).

Jun 15, 2014 | 10:01 PM

#10

1 Slow WS6

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Launching!

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I think (hope) the LS would be equal or above down low if it also had LT's, and a UDP (not to mention higher ratio rockers).[/QUOTE]

Depends on year I guess. Another comparison, same LT1 M6 and my buddies 98 Z28, A4 (lid only mod) Same dyno, Same day

Jun 16, 2014 | 12:34 AM

#11

GiggleJuiced_SS

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comparing a M6 dynosheet vs A4 isn't a fair comparison. Auto will always dyno lower then a manual transmission.

Jun 16, 2014 | 07:58 AM

#12

1 Slow WS6

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Quote:

Originally Posted by GiggleJuiced_SS

comparing a M6 dynosheet vs A4 isn't a fair comparison. Auto will always dyno lower then a manual transmission.

It was a locked converter so it shouldn't be too far off

Jun 17, 2014 | 03:15 AM

#13

GiggleJuiced_SS

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through a locked converter will make it alil better comparison maybe, but a the auto will always soak up more hp on a dyno doesn't matter what converter is in it. doesn't mean that the M6 will be faster tho.

Jun 18, 2014 | 02:26 AM

#14

slowpoke96z28

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I wonder what a gen3+ engine would sound like with original SBC firing order and if it would make the same power.

Jun 18, 2014 | 02:32 AM

#15

hrcslam

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Quote:

Originally Posted by slowpoke96z28

I wonder what a gen3+ engine would sound like with original SBC firing order and if it would make the same power.

It would sound like a Gen I and II SBC. Power difference would be unnoticeable, but longevity would be reduced marginally.

Jun 18, 2014 | 09:11 AM

#16

DANOZ28

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A4 will always dyno aprox 15 rwhp less. positive A4's are always applying power to the wheel.

Jun 18, 2014 | 12:34 PM

#17

1 Slow WS6

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Quote:

Originally Posted by DANOZ28

A4 will always dyno aprox 15 rwhp less. positive A4's are always applying power to the wheel.

By positive A4, do you mean a locked converter?

Jun 18, 2014 | 01:21 PM

#18

1 Slow WS6

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Quote:

Originally Posted by GiggleJuiced_SS

Yes I know it was just a fun comparison and figuring the numbers out adding the loss in from the auto ( 20 percent) and subtracting the loss from a manual ( 12 percent) you get 304 /308 . The LT1 use to destroy that 98 LS1 my buddy had but would hang with my 01. They both ran 12.9 to 13.1 consistently. The low end grunt out of the LT1 is the only thing that saved it, haha

Jun 18, 2014 | 03:09 PM

#19

Mikey 97Z M6

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Quote:

Originally Posted by hrcslam

It would sound like a Gen I and II SBC. Power difference would be unnoticeable, but longevity would be reduced marginally.

There is additional power/efficiency to be made with the LS1 firing order. Some cam company's even offer cam profiles for older SBC's with the firing order of an LS engine due to improved efficiency. I can't remember the differences, but I do remember reading about it 10 years ago or so. 7-10 hp comes to mind.

BTW, nice burb, I have an NBS Tahoe same color as yours with a 3/5 drop and a 97 Z28 lol...

Mike

Jun 18, 2014 | 04:01 PM

#20

hrcslam

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Quote:

Originally Posted by Mikey 97Z M6

Agreed, but that 7-10 was on vehicles well over 700 hp. At 300hp the power difference is there, but well within the margin of error. Longevity is effected however, but that is something that takes time to notice. An LSx will out last a Gen 1 or 2 SBC in any condition. It has to do with main bearing loading. Which is why it runs smoother.

Thanks man, I repainted the Burb black. I don't like it now. Going back to gray in a year or so.

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