Durango_Boy

iTrader: (1)

Okay, in regards to the 8.1L 8100 496, what are some of my accessory options like bracket configurations and oil pan?

This motor will be installed in a '74 Vette so the steering and suspension is a concern.

Will any of the other big block oil pans fit? I know some pans from the ZZ502 and ZZ572 fit in the C3 Corvette and I have seen several of the Mark V and Mark VI 7.4L 7400 454 in C3s as well. That would lead me to believe that some of the Vortec big block oil pans work in C3s and I just need to know which if not all would fit on an 8100.

I'm also wondering about brackets. Minimalistic is best. No A/C, and no smog. Just alternator, power steering, water, tension, and idle will be needed. The upper A-arms cause the most problems. I good reference is that a serpentine bracket kit from a '92 Camaro will fit just fine so long as the smog delete pulley and bracket are turned backwards. Not having anything there would be a plus.

Info is great guys and you all seem to have a lot of it.

bczee

iTrader: (12)

I would say most of you normal Vette BBC accessories should work. As the 8.1 is just a new block and longer stroke over a older BBC 454 Mark V. Heads might be of a different design but should be able to swap most everything.

Bryan @ Speed Inc.

iTrader: (19)

new block meaning what? newly re-issued, or are there revisions to it's design???

bczee

iTrader: (12)

reviesion of the design, one item was that in the Mark V they removed the Fuel pump housing, on the Mark VI, the put it back in. but search the internet for more information and history..

Schitzo

iTrader: (6)

try this guys. They seem to know alot about the 8.1 motors.

http://www.raylarengine.com

Durango_Boy

iTrader: (1)

I emailed their tech department so thanks fior the suggestion.

Durango_Boy

iTrader: (1)

Believe it or not there does not seem to be that much that's easily found without going through obscure sites that seem to have no connection to the project at hand.

jmarsa

iTrader: (1)

Not sure how obscure these are:

http://en.wikipedia.org/wiki/Chevrolet_Big-Block_engine

http://en.wikipedia.org/wiki/GM_Vortec_engine#8100

--JMarsa

Durango_Boy

iTrader: (1)

Yeah those were some of the first places I looked when I got going on this project. I appreciate the help.

kwplot34

You forgot to mention that you will be putting 2 alternators on your car.

big2bird

Gotta have enough power for the dual wiper pumps.

kwplot34

Yip,thats probably why he is going to a BB,to turn the twin alt's,and don't forget to turn the twin smog pumps to work his headlights

pist0lpete

iTrader: (3)

From what I understand the aluminum 8.1L has little to nothing to do with the previous big block engines. It is basicly a big block version of the LS1. It has a different cam crank all internals and I wouldn't be surprised if the exterior bolts for the accessories etc. are different as well. There is one or two companes that make cams a port heads for them but they are expensive. I think the lack of aftermarket support is why nobody seems to use these engines for swaps.

big2bird

big2bird: post constructive feedback please, not misquotes and negative comments

Bo185

It's not aluminum! The blocks iron as well as the heads.

G-Body

iTrader: (4)

Lets try to keep this thread on track

bczee

iTrader: (12)

The 8.1L (RPO L18) is new or Redisigned generation of the BBC, It has been redesigned to use new and simular technology as/from the LSx family of engines (ie. Coil on plug, EFI/Intake, on piece rear seal, Roller Cam, etc). but for the most part, it is still a Tall deck BBC, same bore center but stroked to bring it out to 496cid.

Heads are still the canted (porcupine valves arrangement) but redesigned.

TimAT

Forgive me for asking, but I'm curious. why hunt around for stuff to make an 8.1 go, when you can get an "out of the box" 8.2 that's already a proven thing and has loads of parts already on the market? The 8.1 is 496 cubic inches, and the 8.2 is a 502. The 502 is a standard 9.8 deck block, meaning it'll fit lots of places the 8.1 will not without major surgery. If it's cubic inches, then there's always the 572.

Not trying to rain on the parade at all, just curious.

Durango_Boy

iTrader: (1)

Easy. I found a complete take out 8100 for almost nothing compared to what a 502 would cost.

It was a budget build project. Turned out the budget called for cuts, and a Vortec 350 was chosen for the build.

big2bird

I will comply .