Solid Facts about Speed

**9T8W66** · 09-20-2008, 06:05 AM

Originally Posted by Insert

remember that some cars were "factory freaks", they came with a different intake, or heads, or block. there are a few different casting numbers. but some LS1's did push a bit more power than others. this could explain the difference in times.

- dont ask me why they did this, or how they decided to do it, they just did.

but i mean, the times arent that different between the two mags, one says 13.2 the other 13.4. two tenths of a second could easily be the driver factor. one guy punches it a little later, or he shifts a little early, takes a little longer to pull the shifter, that could easily make two tenths difference.

Factory Freaks don't have different parts it's just that the engines seem to run as though they are blueprinted. Meaning perfect Ring seating, Compression, Bearing tolerences, Valvetrain geometry, etc...

And it's obvious that different drivers will have different results but don't forget Altitude has a big influence on the amount of power any engine can make.
And most quick times are done at tracks close to Sea Level.

**shady milkman** · 09-20-2008, 06:13 AM

Originally Posted by Insert

remember that some cars were "factory freaks", they came with a different intake, or heads, or block. there are a few different casting numbers. but some LS1's did push a bit more power than others. this could explain the difference in times.

- dont ask me why they did this, or how they decided to do it, they just did.

that is just wrong...factory freaks come out of GM's build tolerances

**97ramsst** · 09-20-2008, 06:35 AM

Originally Posted by 9T8W66

Factory Freaks don't have different parts it's just that the engines seem to run as though they are blueprinted. Meaning perfect Ring seating, Compression, Bearing tolerences, Valvetrain geometry, etc....

Thats what happens with a mass produced assembly line engine.

BTW all 02s had LS6 intakes and the same heads...some had LS1 and some had LS6 blocks but that been proven time and time again to have no effect on performance (and I have a 02 with a LS6 block and a 02 with an LS1 block...so I am not biased!

)

**hutch1999** · 09-20-2008, 06:43 AM

I wouldnt mind having my manual for DD and a built stalled auto for racing, thats just me.

**Speedy_Gonzales** · 09-20-2008, 06:44 AM

A stallled auto will kill any m6

**SVG210** · 09-20-2008, 12:21 PM

Originally Posted by Insert

remember that some cars were "factory freaks", they came with a different intake, or heads, or block. there are a few different casting numbers. but some LS1's did push a bit more power than others. this could explain the difference in times.

- dont ask me why they did this, or how they decided to do it, they just did.

but i mean, the times arent that different between the two mags, one says 13.2 the other 13.4. two tenths of a second could easily be the driver factor. one guy punches it a little later, or he shifts a little early, takes a little longer to pull the shifter, that could easily make two tenths difference.

dont forget to add the D.E.F.

**Hawaiianz28** · 09-21-2008, 01:21 PM

well as for the Factory freaks...
as its known in the ..tuner world (JDM) its been explained that every so often a factory takes an engine off the line and "inspects it" now we all have a boss right?
what better way to get boss points than show that as a floor and assembly manager that your engines are "PERFECT"....

**Insert** · 09-22-2008, 07:43 AM

Originally Posted by 9T8W66

Factory Freaks don't have different parts it's just that the engines seem to run as though they are blueprinted. Meaning perfect Ring seating, Compression, Bearing tolerences, Valvetrain geometry, etc...

Well sir, please accept my apology. i didnt mean to misuse the term "factory freak". but i just didnt know what to call the cars that came with different parts than normal.

I mean, some 98 f-bodies came with c5 cams. some later f-bodies came with LS-6 blocks. these little differences could account for 2 tenths of a second.

http://www.ls1.com/forums/showthread...intake+casting

although mixed reports say that there are no differences in performance some say there is a gain.

there is even a thread somewhere on here that i read a while back, a guy pulled heads off his camaro, and they were not the right casting number, they were something else, it was a stock car and he was original owner. although i am in class right now and dont have time to keep running searches, but look around, its probably still on here somewhere.

**9T8W66** · 09-22-2008, 12:58 PM

Originally Posted by Insert

Well sir, please accept my apology. i didnt mean to misuse the term "factory freak". but i just didnt know what to call the cars that came with different parts than normal.

I mean, some 98 f-bodies came with c5 cams. some later f-bodies came with LS-6 blocks. these little differences could account for 2 tenths of a second.

http://www.ls1.com/forums/showthread...intake+casting

although mixed reports say that there are no differences in performance some say there is a gain.

there is even a thread somewhere on here that i read a while back, a guy pulled heads off his camaro, and they were not the right casting number, they were something else, it was a stock car and he was original owner. although i am in class right now and dont have time to keep running searches, but look around, its probably still on here somewhere.

The Vette cam in the 98 f-bodies I've heard of but in reality there would be very little if any power difference. The F-body cam had more lift while the Vette cam had a tighter lobe spread. And LS6 blocks would add nothing to HP numbers.

**shady milkman** · 09-23-2008, 11:53 AM

Originally Posted by 9T8W66

The Vette cam in the 98 f-bodies I've heard of but in reality there would be very little if any power difference. The F-body cam had more lift while the Vette cam had a tighter lobe spread. And LS6 blocks would add nothing to HP numbers.

just better windows and oil circulation

**Spaz** · 09-23-2008, 11:59 AM

Originally Posted by Insert

Well sir, please accept my apology. i didnt mean to misuse the term "factory freak". but i just didnt know what to call the cars that came with different parts than normal.

I mean, some 98 f-bodies came with c5 cams. some later f-bodies came with LS-6 blocks. these little differences could account for 2 tenths of a second.

http://www.ls1.com/forums/showthread...intake+casting

although mixed reports say that there are no differences in performance some say there is a gain.

there is even a thread somewhere on here that i read a while back, a guy pulled heads off his camaro, and they were not the right casting number, they were something else, it was a stock car and he was original owner. although i am in class right now and dont have time to keep running searches, but look around, its probably still on here somewhere.

cams were changed to get rid of the egr... the LS6 block was a mistake made in the mexico plant... as far as i know no head mistakes or changes were made at any plant... and the guy was probably looking at the wrong number because you don't need to pull the heads to see the casting number....

**shady milkman** · 09-23-2008, 12:00 PM

Originally Posted by Spaz

cams were changed to get rid of the egr... the LS6 block was a mistake made in the mexico plant... as far as i know no head mistakes or changes were made at any plant... and the guy was probably looking at the wrong number because you don't need to pull the heads to see the casting number....

passenger side rear of the block correct?