Iron block 370?
Iron block 370? I need to build a new bottom end, and instead of a 346 I've been looking at some alternatives, and wondering why there are not any more iron block 370s? It'd be no more expensive than a forged 346, but should be capable of producing signifigantly more power/torque due to the much larger bore (4.030 -vs- 3.905), kinda like the old MTI "All-Bore" motors that were popular a couple years ago. 500/480 would be pretty easily doable with a good set heads (S3 TEA/AFRs, a big cam (244/248 or similar), 11:1 compression and good exhaust, right? What am I missing here? Why NOT do this, what is the drawback involved? Anyone running a similar motor? Just thinking out loud.
Pros:
Larger bore
Stronger block for NOS
Cheaper/easier to machine
Cons:
110lbs of added weight
Pros:
Larger bore
Stronger block for NOS
Cheaper/easier to machine
Cons:
110lbs of added weight
Launching!
Joined: Jan 2002
Posts: 262
Likes: 0
From: Charlotte, NC
Got one right here. Its a customer car we built, C5 Vette. Haven't done the final tune on it, have to finish breaking it in. Should have numbers for you this time next week. Its 11.1:1 cr, 244/248 610/615 114 lsa, Stg III heads. Built with nitrous in mind. I'll let you know.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by SPANKY LS1
I need to build a new bottom end, and instead of a 346 I've been looking at some alternatives, and wondering why there are not any more iron block 370s? It'd be no more expensive than a forged 346, but should be capable of producing signifigantly more power/torque due to the much larger bore (4.030 -vs- 3.905), kinda like the old MTI "All-Bore" motors that were popular a couple years ago. 500/480 would be pretty easily doable with a good set heads (S3 TEA/AFRs, a big cam (244/248 or similar), 11:1 compression and good exhaust, right? What am I missing here? Why NOT do this, what is the drawback involved? Anyone running a similar motor? Just thinking out loud.
Pros:
Larger bore
Stronger block for NOS
Cheaper/easier to machine
Cons:
110lbs of added weight
Pros:
Larger bore
Stronger block for NOS
Cheaper/easier to machine
Cons:
110lbs of added weight
It is 80lbs more than the LS1. How do i know this i have a 370 in my car. It has 400miles on it right now. It was built for boost. So i have 9.1 CR. The damn thing makes *** load of TQ.
Last edited by goober35; Feb 12, 2005 at 04:12 PM.
Originally Posted by PHANTA-Z
Got one right here. Its a customer car we built, C5 Vette. Haven't done the final tune on it, have to finish breaking it in. Should have numbers for you this time next week. Its 11.1:1 cr, 244/248 610/615 114 lsa, Stg III heads. Built with nitrous in mind. I'll let you know.
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I've been running a 370 for almost two years now. I've put over 18,000 miles on it. Even through an automatic transmission and a loose converter it makes great power. If there are any drawbacks I haven't found them.
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Verdad Gallardo Ummm Gold Z arent you running that G5 cam. How in the hell are making 638rwhp with that cam. I could have swarn you had an ls1 in your car. You just put in that G5 a couple of mouths ago. Am i missing something
Launching!
Joined: Jan 2002
Posts: 262
Likes: 0
From: Charlotte, NC
Originally Posted by Demon SS
if this is who I think it is, the motor is one we built.
Tom