8.1ltr vortec ls1 in a 99t/a
05-13-2009, 12:31 AM
#23
Staging Lane
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so if you did just want to say screw it, and build one of these bad boys up,
lets say with Raylar Heads and as much possible ls upgrades you could use how much money are you looking to spending and what power grains would be reasonable ???
lets say with Raylar Heads and as much possible ls upgrades you could use how much money are you looking to spending and what power grains would be reasonable ???
05-25-2017, 12:13 AM
#27
Teching In
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The 8.1 is a Mark IV big block(old school)
. Mechanically it shares nothing with the lsx series motors. Just perhaps the electronics and a similar intake manifold design. Being a MK IV any bbc heads should be interchangeable assuming you had an intake manifold to match up to it.
. Mechanically it shares nothing with the lsx series motors. Just perhaps the electronics and a similar intake manifold design. Being a MK IV any bbc heads should be interchangeable assuming you had an intake manifold to match up to it.it'z bout that time to upgrade and give the goat the powerplant she deserves
05-25-2017, 10:32 AM
#29
Lol....all kinds of bad info in here, finally someone comes out with the correct info...this is why I don't come in to the forums anymore. If you don't know, SHUT UP.
"The Vortec 8100 is classified as a Mark VII (7)
the 8100 is a TALL deck motor, measering 10.2 inches
all bolts in the motor are METRIC threads, nothing has std threads
standard big block chevy headders WILL bolt up, using METRIC bolts
the crankshaft is a different stroke, 4.370, which is the same gm's 572
the bore remains 4.250, stock for the previous 454s "
^^This, as well as the other posts that say it's MKVII. Not MKIV, or MkVI...
All metric BBC, runs with the Gen III PCM and wiring, and it is it's own unique turd. Bad gas mileage, heavy, and very little aftermarket.
"The Vortec 8100 is classified as a Mark VII (7)
the 8100 is a TALL deck motor, measering 10.2 inches
all bolts in the motor are METRIC threads, nothing has std threads
standard big block chevy headders WILL bolt up, using METRIC bolts
the crankshaft is a different stroke, 4.370, which is the same gm's 572
the bore remains 4.250, stock for the previous 454s "
^^This, as well as the other posts that say it's MKVII. Not MKIV, or MkVI...
All metric BBC, runs with the Gen III PCM and wiring, and it is it's own unique turd. Bad gas mileage, heavy, and very little aftermarket.
05-27-2017, 10:56 AM
#31
My brother ended up buying a 3500 with one in it to use for hauling stuff, was a fleet vehicle from the local town, low mileage. I told him to put a quart in every time he put gas in it. A guy I worked with had a Silverado 2500 with one, couple guys local to me have a few trucks in their shop right now that they are working on, all of them have the 8100.
For some odd reason they are all over when you don't have a use for one.
For some odd reason they are all over when you don't have a use for one.
