Does the 8,3l have 4 bolt main caps?
- Thread starter Jsparks
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mjorgensen Woodhouse
Enthusiast
No they have 2 bolt mains
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Figured Mark would know this one.
They have 4 bolt main bearing caps. Below is a quote from the 2004 service manual:
"Six iron main bearing caps use four bolts per cap;
two vertical and two horizontal."
Dan
They have 4 bolt main bearing caps. Below is a quote from the 2004 service manual:
"Six iron main bearing caps use four bolts per cap;
two vertical and two horizontal."
Dan
Les Quam
Enthusiast
Mark,
Thanks again for helping me out with the parts for my 97 RT 10. It was much appreciated.
Since your answering questions, perhaps one more? Do you consider the Viper engine to be a big block in the 1960s muscle car sense of the word? Or a small block in the 500 cubic inch small block Chevy modern sense of the word. I always thought the Viper was the only big block sports car since the 60s Shelby Cobra's but others on this board think the Viper is a 10 cylinder small block? What are your thoughts? Thanks.
Thanks again for helping me out with the parts for my 97 RT 10. It was much appreciated.
Since your answering questions, perhaps one more? Do you consider the Viper engine to be a big block in the 1960s muscle car sense of the word? Or a small block in the 500 cubic inch small block Chevy modern sense of the word. I always thought the Viper was the only big block sports car since the 60s Shelby Cobra's but others on this board think the Viper is a 10 cylinder small block? What are your thoughts? Thanks.
SweetRed04
Viper Owner
I'm not Mark, but while they have long blocks, they have small block bore spacing which was typically how the muscle car engines were differentiated.
Viper engines are technically a 4-bolt main; two vertical two horizontal.
The Viper engine is also technically a small block- it is just 2 cylinders longer. This brings it up to big-block cubes, but thats it. However, since the big/small block debate never involved V-10's, I dont feel it can really be called either.
The Viper engine is also technically a small block- it is just 2 cylinders longer. This brings it up to big-block cubes, but thats it. However, since the big/small block debate never involved V-10's, I dont feel it can really be called either.
So then out of curiosity why is everyone so hyped on the billet caps with 1k hp. I have never seen a 4 bolt main fail and I have seen a ton of old high hp engines
G
grcforce327
Guest
We ARE using better caps just to be sure. I was originally going to do billet and I still might but I can get the mopar caps for quit a bit cheaper and that is what heffner is using on motors with way more power. I just think billet might be overkill for 900hp
You MUST be excluding the gen I block which has 4 vertical bolts.
Wasnt even thinking about Gen-1 when I posted that, this is in the Gen-3 forum. I probably should have said "Newer Viper Engines".
Its not the horsepower, its the torque these engines make. there is a lot to be said about a crank as long as the Viper's twisted by over 1000 lb/ft. Vs. a shorter V8 crank twisted by 800 or less lb/ft to make that same 1000 horsepower. As stated by Plum, the caps/cranks walk around once you get over 1000, and the stock caps are nothing more then nodular cast iron... nothing to write home about, nor are the OEM bolts- both can allow deflection and walking. Billet caps and studs are strong enough to keep the crank where it is supposed to be.
As stated above, yes, 900HP is not over the limit of OEM caps, especially if they are studed and honed. However, at those levels, it just makes sense if the engine is torn down that far to get it over with.
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Agree with Daniel.
Don't mess with the nodular iron caps in a big build, the crank is too long and heavy. Go billet and use the best studs.
Dan
Don't mess with the nodular iron caps in a big build, the crank is too long and heavy. Go billet and use the best studs.
Dan
