LT4 Heads
#6
TECH Junkie
iTrader: (15)
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.
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#8
Maybe so but not running high 12's. Bolt on LT1's are capable of that.
#10
TECH Veteran
iTrader: (20)
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
#16
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Join Date: Oct 2007
Location: Central Valley, CA
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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.
#18
11 Second Club
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.