cc Qjet fuel system help
 

i want to know if anyone has pulled the stock mechanical pump on an 87 LG4 fbody and used a fpr ? im installing a vortec 5.7L engine with an LT1 cam with no provisions for the mech pump. will my stock in tank pump feed the fpr enough fuel to keep a 5.5psi constant pressure to the stock 87 LG4 Qjet??

The pump + FP should be fine. I put a 355 in my 84 around 1998. Issue is getting bigger jets/rods. GM use to sell them as part of a retro fit kit, not sure if they still and they weren't cheap.

thanks PZ, someone else told me it should be adeuate to feed around 300 hp and mine should be pretty mild, the rods/ hangers can be had from S.M.I for 37 plus shipping im looking for cheaper lol if anyone has a set of better rods hangers for around 15-20 shipped to 18428 let me know if your in NW nj i can probably pick up
btw catawissa is that near scranton?

did the lg4 cars even have a stock in-tank pump?
if you had a mechanical pump, that was the fuel pump.

kinda, a little more central PA, I'm a few miles outside of Bloomsburg.

GM used both, an in-tank and mechanical pump on some cars. my 84 was one of the first with the 305HO and there was a hot start problem and GM's fix was to install an elec pump in the tank and I think it was done on all 85+ carb'd cars.

sounds right the oldest one ive ever owned was a 85 5sp z28 and it had both

ok, cuz i had stripped a 86 iroc that didnt have the intake pump. the tank is still in my backyard.

if it was a iroc with tpi it had a higher volume in tank pump something around 195lph... if your iroc was a 4bbl, and you mean in tank not "intake" (i thought intake refered to the one on the block)then maybe someone took it before you got to it

a little off topic does anyone have any extra Qjet rods and hangers? im gonna need some to dial this thing in when it gets installed

as far as i know the electric in-tank pump on carbed cars was some sort of recall or upgrade due to fuel boiling/starvation issues. I also had an 85 z28 5 speed and only had the mech pump. You can run a low pressure electric pump under the hood, ive seen it work before, but im not sure how well. That would prob be your cheapest bet

i think im gonna do the "wait and see" i have a fpg that will be installed riight in front of the carb to give an accurate read of the pressure the carb gets, if its not enough gm has a "corvette" in tank pump for 72$ its 195lph and is what was used with the old GM H.O. 350(zz4) street legal swap with a regulator like i already have