LQ 370 vs LS3
budget 408 with a lunati crank......what budget are you going for lol
pistons and rods are going to run you around 1800 new
I don't think for 98% of the people out there the 90lb difference will even be felt and you can always shed some weight else where
pistons and rods are going to run you around 1800 new
I don't think for 98% of the people out there the 90lb difference will even be felt and you can always shed some weight else where
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Wiseco Pistons k464x3 - $750
Lunati H-beam rods - $500
I'd do K1 crank, Compstar Rods, and Wiseco pistons... in the LS3. A 418 would be beastly...
And the 90lbs is on the front of the car. I'd much rather not have to lose 90lbs off somewhere else just to maintain weight, especially if that weight is over the nose.
And the 90lbs is on the front of the car. I'd much rather not have to lose 90lbs off somewhere else just to maintain weight, especially if that weight is over the nose.
That set-up would be out of my price range. I'm going to just bore my LQ4 over.
If weight is a serious concern then go LS3.
If weight is not, then go with a 408. They are available from multiple companies and manufacturers at very low prices. One of the cheapest rotating assembly combinations out there I feel like.
And yes go with LS3, L92, or LSA heads.
If weight is not, then go with a 408. They are available from multiple companies and manufacturers at very low prices. One of the cheapest rotating assembly combinations out there I feel like.
And yes go with LS3, L92, or LSA heads.
TECH Veteran
Joined: Sep 2014
Posts: 4,892
Likes: 703
From: Mississippi
Go with TFS/AFR cathedral head!! They make more power UNDER THE CURVE and peak power to. I got a recipe in my cookbook where they took a LS3 headed 408 Ci motor vs a AFR 245 head out the box.... The AFR heads makes approximately 25hp/25tq more over the LS3 head...This was the same motor testing was done on also.
On The Tree
Joined: Oct 2011
Posts: 102
Likes: 0
From: Dirty South
More bore is not going to give you more power. Now that being said the .035 bore difference would be a benefit assuming that both are going to run LS3 heads. But if the LQ 370 is running cathedral heads it does not matter. If you can deal with 135 lbs more weight take a look at LSX 376 it will give you plenty room to grow later down the road , last summer these were selling foe $ 5400 and come with 3 yr warranty.
I forgot to mention that this is going in a 96 Impala... I'm in a B-boby LS swap group and everyone who switched over to a iron 6.0 said it weighed less than the LT1 motor so I'm not concerned about the weight difference any more.
How do you join that group, I have a Impala SS still original ?
Go with TFS/AFR cathedral head!! They make more power UNDER THE CURVE and peak power to. I got a recipe in my cookbook where they took a LS3 headed 408 Ci motor vs a AFR 245 head out the box.... The AFR heads makes approximately 25hp/25tq more over the LS3 head...This was the same motor testing was done on also.
I'd take an aftermarket LS3 head or small bore LS7 if I had a 4.005 bore or better though.