dont you need to get to a junkyard and rip off a V8 right front brake line or so i heard? thats on my list of stuff to get in preparation lol

 

Well I'm not sure about that... this is news to me on the brakes... the line runs right over the mounting spot for the V8 mounts... I'm going to try bending it to see what happens, and go from there... the line can be flexed to an extent, but I'm not sure how if it will go far enough to clear it... Keep you posted.

 

all I had to do was move the brakeline back on th X-member..the holes are already there for the little clips...on the x-member

 

another random question, since you are swapping from mpfi to TPI, do you really need to swap to a V8 fuel pump? i asked this on this board a while ago n didnt get any positive yes or no answers, and just thought one of you would chime in since you are goin along with the swap

i thought since the V6 is mpfi, itll support the TPI too.

 

Sorry to tell you this, but a V6 MPFI fuel pump will not feed a TPI V8 properly... the V6 fuel pump produces a lower fuel pressure than the TPI fuel pump... A TPI can run off a MPFI fuel pump, but not for long, the engine will soon be starved for fuel... fortunately the pumps interchange rather easily. Also the TPI fuel pump has a damper on it as well to reduce fuel aeration and the like. The TPI pumps brand new I think start right around $60. I'm not sure I haven't picked one up. You cannot Use a TBI fuel pump either for the swap, it has to be a TPI pump. TBI's ran at a lower pressure as well.

 

yea the TBI was around like 12 psi... and TPIs/LT1s are upwards of 42 or so i cant remember, i think ill spend the 50/60$ for the new one instead of taking chances lol thanks

 

100% INCORRECT

ALL GM MULTI-PORT FUEL INJECTED CARS (whether it be a 4 cylinder, 6 or 8) run off the same fuel pressure

dont believe me?
look up the part number for a:
1991 camaro Z28 350 TPI
1991 camaro RS 3.1 MPFI V6


now, obviously, a ANY stock fuel pump will not be enough to feed a BUILT tpi motor, but its enough for a while

 

:hail: thank you..

::crosses off list:: few more months of bustin my young butt at work, and i can finally get started lol

 

I'm not trying to argue here, but I have looked up the part numbers and they are different (of course I looked up a '90 Firebird 3.1 and a '90 350 Trans Am). Maybe this is like the radiator thing. The guys at Thirdgenresource.com will tell you the same... when I was down there getting my 350 that was one of the first things they told me, "get a TPI fuel pump". Looks like I'm going to do some research tomorrow!

 

Hey I finally got the radiator pic, here it is.... note the upper hose on the driver side. (it's a little hard to see)

 

Here's the engine too...

 

Sure..you just turned it around....

 

Great thread

 

i'm glad we're on the same plane here cuz i'm just trying to help

i'm a GM technician in training (see sig)...........thats what i was taught, and thats what i believe, i have taken fuel pressure readings off my V6, and many TPI/LT1 350's and they were the same

its not like your swapping from a TBI setup where fuel pressure is around 13-15 PSI

sounds like the other guys are just trying to make a quick sale off of you

MPFI fuel pump pressure is MPFI fuel pump pressure

 

Damn it, you caught me, I just turned it over lol... no actually I took that pic yesterday.

 

Interesting.... a couple ppl told me I would have to use a different fuel pump... but hey if I can get away with the V6, I'm not going to complain at all. Nothing wrong with saving $$$
Besides, I hate changing them anyway!

 

Is it possible that while both v6 and V8 fuel pumps work with the same pressure, the V8 one delivers more fuel..?
Or does the pressure means the amount..?

 

http://www.partsamerica.com/ProductL...r=Fuel+Pump(v6 fuel pump)
http://www.partsamerica.com/ProductL...r=Fuel+Pump(v8 fuel pump)
They are in fact diffrent i always thought they were the same too

 

Some aftermarket (and possibly GM) have gone to using the TPI pump for all applications. For TBI with the lower pressure, the excess is just sent back to the tank. For V6 with lower volume need, the excess is just sent back to the tank.

There's also a carb in-tank pump (for '87 applications).

Originally from the factory, they each had their own pump.

(Be careful with those links if you use partsamerica. When I clicked on them, I got the same p/n's - then realized both took me to "1990 Pontiac Bonneville SSE", the last vehicle I looked up parts for on this computer.)

 

What is so great about this thread? The different radiators aren't due to different branches of GM, they're different because the V6s are different depending on the model year.

For instance, my '89 RS had the 2.8L. It was the last model year to have that V6.

In 1990, the model year of the car this discussion centers around, they switched it to a 3.1L, which has the same coolant flow direction of a V8, and hence, the same style radiator.

How could someone who has done this swap not know that?

 

I don't know anybody who has swapped every year of V6 3rd gen from 1982 through 1992. Therefore, you learn here from each member who has done a particular year's swap.

 

hello. im not sure if it helps but my 86 IROC has the upper hose on the driver side

 

heres a pic

 

That's the all-years V8 configuration.

The discussion involved V6's that had the upper hose on the passenger side. The 3.1 V6 was on the driver's side, just like the V8's had always been.