LT4 Heads
My fiance ran high 12s with LT4 heads/intake, WS6 intake, 1.6 rockers,stock cam, shorties, 3200 stall, 3.73s and a cutout on street tires. Full race weight. And she hung with H/C LS1 cars all day.
And those times are about on par with what a bolt-on lt1 would run. Lt4 heads would require an LT4 intake as well, as the lt1 intake does not mate up to the lt4 heads. A quality port and polish job on the stocker LT1's would be a better and cheaper investment. Check out AI (advanced induction) and LE (Lloyd Elliot packages from Elliot Portworks)...2 of the best porters in the LT1 world, it's amazing what bang they can give you for your dollar by reworking stock equipment.
True, but she ran shorties and a cutout with stock cats. Imagine adding LTs to that. So they are worth something. And yes we have 3 friends with H/C LS1s making over 400 and she was right there with them from a roll or dig
Trending Topics
11 Second Club
Joined: Jul 2003
Posts: 35
Likes: 0
Maybe so but not running high 12's. Bolt on LT1's are capable of that.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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 All I'm saying is that if a full bolt on car can do what she did with shorties and a cutout on that topend, add on the power from LTs and knock more time off. But OP unless you find a good deal on them look for ported stockers. They will net you more gain than unported LT4 heads will
11 Second Club
Joined: Jul 2003
Posts: 35
Likes: 0
She ran them on the street/freeway in so cal. 2 are H/C bolt on 6 speeds with 4.10s and 1 is 3.23 geared
if you are willing to spend 400 dollars for 5 horsepower I have an airfoil I will sell you haha You pick up the paypal fees and i will throw in a TB bypass j/k save that money to get your heads ported and the stock intake actually flows pretty good the way the general made it but it all depends on what kind of power goals you have.
11 Second Club
Joined: Jan 2010
Posts: 1,707
Likes: 13
From: New Orleans, LA
Stock LT1 heads= 212/215cfm. Stock LT4 heads= 230/243cfm. 10cfm= about 10hp, so the stock LT4 heads would be about a 15 hp gain with your factory cam. If you have a cam with about .500" lift or better the stock LT4 heads can be worth up to 30hp over the stock LT1 heads.
