8.1 monster
02-03-2011, 03:43 PM
#14
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In 2001-2002 GM raced the 8.1 with cam, springs, ported stock iron heads. The HP3 was about to be released as a crate engine, but pressure from Mercury forced GM to quit in the marine game. They didnt want GM's "truck" engine beating up on Mercury's high dollar race engines. Since Mercury was GM largest SBC and BBC customer in regards to buying their marine engines, GM backed down.The purpose of the HP3 was to prove that a standard truck 8.1 could be used in racing with minimal mods. The HP3 was rated at 525hp/560 lb/ft torque, this was all on 87 octane as well. After GM dropped the HP3 project, there was a company that continued on with the 8.1. They got up to 560hp on 87 octane before things started letting go.
Crane and Comp Cams make cams, you can get pistons, springs. Not the support of the GEn 5/6 BBC, but the GEN 7 8.1 BBC can be made to work.
peace
Hog
Crane and Comp Cams make cams, you can get pistons, springs. Not the support of the GEn 5/6 BBC, but the GEN 7 8.1 BBC can be made to work.
peace
Hog
02-03-2011, 09:18 PM
#18
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just like all the old muscle cars my dad and i have done, we always put bigblocks in ****, nothing like the grunt of one, imo i think 8.1 swap is pretty cool, but what do i know? i have a n/a joe gibbs 
lol
lol
02-07-2011, 11:42 AM
#19
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Not to mention there is vertually no aftermarket following for it as far as internals go. A 6.0 is a much better and easier route and thats why everyone runs one. If an 8.1 would haul *** dont you think people would run those instead of droping thousands of dollars into a 6.0??
02-10-2011, 06:09 PM
#20
The reasen no one does it is cause of post like this, if no one does it how can everyone say it wont perform. Iv never heard of it done and if there are a few peaple that have tryed it it was a guessing game anyway and no idea what to do. A 6.0 is cheaper and easer but if you can aford to do a 8.1 build i say try it..