Future motor build questions
Thread Starter
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
Future motor build questions
Just wondering if the direction Im thinking for my motor build at the end of this year is solid for my goals. Currently car is LS3 wet-sump, cammed, stock heads and bottom end, E85 and 14lbs of boost (meth getting added in 2 weeks)
Car makes 800-850rwhp through a stalled 6L80e once the meth is on. For when i want to go bigger blower and built motor i was thinking of a taking the stock LS3 and building a forged 388ci motor.
couple questions are:
1. LS3 or LSA block better?
2. sticking with 4bolt block ok at 1000rwhp?
3. Is 388 a good size to go too?
Car makes 800-850rwhp through a stalled 6L80e once the meth is on. For when i want to go bigger blower and built motor i was thinking of a taking the stock LS3 and building a forged 388ci motor.
couple questions are:
1. LS3 or LSA block better?
2. sticking with 4bolt block ok at 1000rwhp?
3. Is 388 a good size to go too?
Intermediate
Joined: Jan 2019
Posts: 46
Likes: 2
From: Bay Area
I would do a 5.3 with a 4.125 bore to make a 388 and rev it out one of my dream builds that I would like to do, look into it selling your current short block 4 bolt heads should be fine for 1000whp from what I read on the forums and engine builders I’ve talked too. I would skip on the lsa block
Last edited by Edbon; Jan 31, 2019 at 05:47 PM.
Thread Starter
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
I would do a 5.3 with a 4.125 bore to make a 388 and rev it out one of my dream builds that I would like to do, look into it selling your current short block 4 bolt heads should be fine for 1000whp from what I read on the forums and engine builders I’ve talked too. I would skip on the lsa block
Intermediate
Joined: Jan 2019
Posts: 46
Likes: 2
From: Bay Area
people always make them 427s cleetus mcfarlans gen 1 engine is a 5.3 with a 427 his engine lasted 1200-1500whp for a long time on tons of passes like over 300 1/4 mile many street and half mile and drift shows. His engine only blew up cause he said screw it and sent it down the track without coolant
Thread Starter
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
people always make them 427s cleetus mcfarlans gen 1 engine is a 5.3 with a 427 his engine lasted 1200-1500whp for a long time on tons of passes like over 300 1/4 mile many street and half mile and drift shows. His engine only blew up cause he said screw it and sent it down the track without coolant
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
I would do either a stock cube or a 416 CID motor with either the stock block or an LSA one and put some good heads on it and forget about re-sleeving a 5.3 block to turn big rpm, because those 6L80s aren’t designed for turning high rpm anyhow. If you use ARP studs and LS9 head gaskets, that should keep her buttoned up at ~1000whp for sure.
Spend your money on a D1X or YSI blower and make more power than that transmission can handle.
Hell, if your car is making 800-850 whp now through a 6L80 with an unlocked high stall converter, you probably have enough power to run 8s in the 1/4 already.
my 2 cents...
Spend your money on a D1X or YSI blower and make more power than that transmission can handle.
Hell, if your car is making 800-850 whp now through a 6L80 with an unlocked high stall converter, you probably have enough power to run 8s in the 1/4 already.
my 2 cents...
Thread Starter
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
I would do either a stock cube or a 416 CID motor with either the stock block or an LSA one and put some good heads on it and forget about re-sleeving a 5.3 block to turn big rpm, because those 6L80s aren’t designed for turning high rpm anyhow. If you use ARP studs and LS9 head gaskets, that should keep her buttoned up at ~1000whp for sure.
Spend your money on a D1X or YSI blower and make more power than that transmission can handle.
Hell, if your car is making 800-850 whp now through a 6L80 with an unlocked high stall converter, you probably have enough power to run 8s in the 1/4 already.
my 2 cents...
Spend your money on a D1X or YSI blower and make more power than that transmission can handle.
Hell, if your car is making 800-850 whp now through a 6L80 with an unlocked high stall converter, you probably have enough power to run 8s in the 1/4 already.
my 2 cents...
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