Ls1 Throttle Body Vacuum Lines

The blue one is connected to the upper radiator hose on the dirvers side where the large hose has a y split and the smaller hose connects to the throttle body on that side.

Ls1 throttle body vacuum lines. On the bottom of the throttle body there is are coolant line fittings going in and out. Don t let the low price fool you these are feature packed throttle bodies available in both bright silver or black anodized finishes. The enlarged bore sizes allow for increased airflow to support your higher horsepower needs a progressive throttle. 4 bolt 90mm electronic throttle body.

The car was in a wreck so maybe they cracked an ls2 valve cover and replaced it with an ls1 valve cover. Sniper efi s new 92mm and 102mm billet aluminum ls throttle bodies give you a great way to improve engine performance without breaking the bank. Yes ls1 was all aluminium. Ls2 will have these items that an ls1 wont.

Those fittings are connected to coolant lines that has coolant running through the bottom of the throttle body they are not vacuum lines. The elbow wasnt cheap to replace either but was cheaply made and every autoparts store wanted 30 00 for it. What i finally had to do was molest every single vacuum line and lines i thought were vacuum lines until i found that it was the one right under my nose. In the case on the ls1 the t b never touches the engine block.

Ls1 ls2 will look the same to a total noob. The engine was rated at 345 350 horses in the corvette depending on model year and would check in at as much as 325 hp in the f body cars. The two remaining fittings on either side of the t b i capped off with vacuum line caps 1 4 inch. That is how the ls2 i have from an 08 tbss is routed.

For summer time use can you bypass the coolant lines. The intake manifold connects the. This block casting number just below the rear left cylinder head. As a starting point the ls1 was an eye opener for chevy fans.

Reconnect the 8 fuel injector wires reconnect the fuel vapor line to the drivers front side of the intake manifold reconnect any throttle body sensors throttle cables maf and air intake setup. The one at your index finger needs to attach to a fitting in your air intake after the maf but before the throttle body. So i found a flexible 3 8 id fuel line and replaced it for a whopping 1 69. On an f body reconnect the throttle cable bracket and tighten the 2 bolts to 89inch pounds.