Ls1 Throttle Body Vacuum Lines

On an f body reconnect the throttle cable bracket and tighten the 2 bolts to 89inch pounds.

Ls1 throttle body vacuum lines.

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. If you have a big vacuum leak you can often experience a rough high or low idle rpm. Fresh air inlet to the valve cover needs to be routed in front of the throttle blade or the steel elbow in pic 2. For summer time use can you bypass the coolant lines.

The intake manifold connects the. The two remaining fittings on either side of the t b i capped off with vacuum line caps 1 4 inch. This is because the throttle body is trying to get a stable idle by opening and closing the throttle. 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. Run it to the the lower port in pic 2 or the evap port in pic 6. 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 elbow wasnt cheap to replace either but was cheaply made and every autoparts store wanted 30 00 for it.

The rubber elbow that joins the maf and throttle body. In the case on the ls1 the t b never touches the engine block. Its all aluminum architecture made it significantly lighter than past gm v8s and power was great. Those fittings are connected to coolant lines that has coolant running through the bottom of the throttle body they are not 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. On the bottom of the throttle body there is are coolant line fittings going in and out. The hoses can dry out and crack also the nylon vacuum line from the control solenoid right hand side of the intake manifold to the vapor canister has a x 1 rubber hose glued to the end. Vacuum booster to the brake hooks up to the big nipple on the very rear of the intake manifold right by the map.

As a starting point the ls1 was an eye opener for chevy fans. So i found a flexible 3 8 id fuel line and replaced it for a whopping 1 69. Hey guys i ve swapped a ls1 into my 73 camaro and have a question about the map sensor vacuum lines. 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.

If you have a major vacuum leak the throttle body will get problems trying to control it and it will result in strange idle symptoms. The glue deteriorates and the rubber connecting hose separates and allows a vacuum leak. Pcv valve needs full engine vacuum.