85 monte carlo ss computer controlled q-jet-tbi conversion

[firebird_1995]

i picked up an 85 mcss for a great price. been using it as a daily driver and have been getting 20mpg average out of it. it has the computer controlled quadrajet and i have been toying with the idea of converting it to tbi for a little better fuel economy and improved startup. anyone have any experience with this?

[1badz]

Perhaps you meant TPI? TBI = FAIL

[firebird_1995]

Nope. I ment throttle body injection. Not looking for power, just reliability.

[z28cam70]

you wont get anymore reliability or fuel economy out of a TBI. it would cost the same to switch it to a TPI setup as it would a TBI, and you would get better reliability and economy out of a TPI. just my 2 cents

[firebird_1995]

do the tpi intakes bolt to non vortec heads?

[z28cam70]

yes, they will bolt to SBC heads. but if you want the best power and efficiency with mild street engine(under >550" lift cam), get the vortec heads and FI setup as long as it has the MPFI injectors and not the CSFI poppet valves.

[firebird_1995]

thanks for the info! the original plans i had for the car was to put the "baby" lt1 and 4l60e ive had sitting around in it but i kinda like the feeling of running the original powerplant. like i said before, im not overly concerned about power, just reliability and fuel economy. so far i cant complain, just got 22mpg on this last tank thanks to a lot of highway time. i just picked up a wideband o2 kit so i might just try to tune the old quadrajet as best as possible and call it good.

[popo8]

I know its lighter than a Monte, but I just wanted to throw out that when Im nice to the TPI vette, It pulls 28mpg..... average!

[firebird_1995]

is that a 350 or 305?

[popo8]

is that a 350 or 305?

My vette is a 350 TPI

[firebird_1995]

pretty respectable numbers. is it stock?

[popo8]

79767977
pretty respectable numbers. is it stock?

Drive train is completley stock. Is not fast by any means (compared to the camaro). Does a 14.99 in the 1/4 through a 700R4. Its the most economical car I have (outside of the old ladies GENESIS.....)

[firebird_1995]

my dad has a 93 vette and ive heard him say the dash shows he gets 30-31 instant mpg on the interstate. im not sure what he gets average but for a car guy, its hard to beat a bone stock corvette as a daily driver. hell my 2000 monte carlo ss was only seeing 24-26 average!