Klypto

me to... im going to take prob hundreds of pics (love dig. camera) and do a write up on it... BUT i already have a wrecks z28 and v6... soo i wont be needing to buy some of it,BUT i will say what i swap into...

cory

95wannabe

Maybe some people didn't encounter the same problems as you, so they're not wanting to give you the wrong info... but, I've read on here that the volume output of the LT1 pump is higher, same pressure just capable of higher volume. I've also read on here that a few have used the v6 pump on a stock LT1 with no problems. In my case I didn't want to pull the tank down twice, so I changed it.

Sergio

Get your point but it's always usefull to start a 'Think Tank' in which people can share experiences, ideas and information.
If some have replaced the intank pump i assume they would have compared the pumps to see wether the pumps are identical or at least wrote down the V6 pump part number for comparison.
Also, somebody might have found the tech details in some thick GM workshop manual that should state the pumps specs vs the V8 one.

JJayzX

Its a good idea to get a performance fuel pump escpecially when going to larger motor and you say heavily modded. So you want a pump that can push it so when your down the track you wont lose top end.

gerard14

the pumps are different. here is the specs....

93-95 v6 cars use a carter p74130 gallons per hour 38 psi shutoff 78-92psi
93-95 v8 cars use a carter p74131 gallons per hour 52 psi shutoff 92 psi
96-97 v8 cars use a carter p74782m gallons per hour 50.8 psi shutoff 33 psi



your welcome.

gerard14

89-95 3.1,3.4 ign on 40-47 psi idle 31-44 psi
86-98 5.0,5.7 ign on 40-47 psi idle 30-44 psi


the flow is more important v8s push on average 20 more gallons per hour

Sergio

Dammit ! Here goes another bill or 2 and some serious elbow grease
Thanks for the info guys ....

Might start the swap with the OEM pump though and when i have it up and running (most of the hard work done) i'll look into the fuel pump drama ..


Would an inline pump be a solution here ?? I never understood how an inline pump could push more fuel than the intank would be able to give .... Doesn't make sense now does it ??

Sergio

Also, what does the PSI shutoff mean ???

Plus, i don't get this part:

89-95 3.1,3.4 ign on 40-47 psi idle 31-44 psi
86-98 5.0,5.7 ign on 40-47 psi idle 30-44 psi

No idea what is meant here, can somebody clarify that ??

gerard14

Also, what does the PSI shutoff mean ??? shutdown pressure if overpressurized i believe.



year range: 89-95
motor size:3.1,3.4
psi pressure with ign. on not running 40-47 psi at idle 31-44 psi

year range:86-98
motor size: 5.0,5.7
psi pressure with ign. on not running 40-47 psi idle 30-44 psi

Sergio

In other words, the V6 setup will work perfectly for a V8 setup but could end up running out of breath in the upper RPM's when more and more fuel is needed due to less gallon volume ?

NEXT Question, noticed that on the Driverside front Wheel arch that 4 fuel lines come from the back, they seem to end up into 2 thicker lines.

- I assume 1 that acts as a fuel feed and 1 qs a Fuel return line ??
- Why are there 4 and not just 2 coming from the tank ?
- Are these 'V6' lines compatible with the Lt-1 setup ? So they can easily be connected/disconnected and then used ? (I assume the lines have identical specs).

Thanks,

Sergio

Keeping the Swap topic alive Another question ...

Any difference in heating hoses that run to the heater core ??
Can the lines/hoses from the 3.4 just be hooked up to the Lt1 engine ?

I mentioned reading that the A/C system connections are slightly different, anybody know what exactly is different ??

NOTE: i am currently deployed for a military mission and besides a freakin' 33K6 modem i don't have my V6 Camaro, workshop manuals nor my LT1 project engine here so it's hard for me to look things up or just compare setups and details.
This could explain the somewhat ignorant questions at times.

nytrus1

I ran the stock '94 v6 fuel pump with the LT1 for many track passes.
I started with a stock 96 Lt1, A4, 3.23 gears, and 75 track and many street passes later, had hotcam, shorty headers, 3.73 gears and drag radials running 12.90s still on the stock v6 fuel pump. At this point I wanted to spray it, so while I changed trans/rear end, I swapped out the stock v6 pump for a warlbo 255 lph pump.

" Are these 'V6' lines compatible with the Lt-1 setup ? So they can easily be connected/disconnected and then used ?"
I am still running the stock v6 fuel lines, just plug them into the lt1 fuelrail. They are a little shorter, but if you unhook the clip that holds them to the inner wheelwell, they reach just fine.

"on the Driverside front Wheel arch that 4 fuel lines come from the back, they seem to end up into 2 thicker lines."
there are 2 FUEL lines, the thicker is the feed, the smaller is the return. the other lines are vent lines.

"Can the lines/hoses from the 3.4 just be hooked up to the Lt1 engine ?"
yes

"A/C system connections are slightly different, anybody know what exactly is different ??"
the a/c pump and lines are different. the receiver/dryer and condensor connections are the same , so just get the lt1 a/c pump and line and they will hook right up.

gerard14

you are incorrect about the a/c pump. it is the same. a/c pump is the only pump interchangeable for the 3.4 unless u meant 3.8






thats it, when i do this swap i am going to make a very detialed web site with step by step info and about 200 pictures. everything from what what to splice where with picture to b4 and after pics

Sergio

GREAT INFO !!!!!!!! Thanks a million ... Keeping that pump for the time being, reusing those fuel lines and i'll see into that A/C issue because i'm sure i heard there is a difference in lines/hoses eventhough the compressor is the same (3.8 compressor is totally different indeed).

Got another one.

Is there ANYTHING that needs to be changed in the RELAY/FUSE box under the hood ?
I believe the injectors have their relay there for instance. I can imagine that being different now with 8 (bigger) injectors .......

Jonas

hey guys im probly about to do a v6 to LT1 engine swap i was just wondering what parts i might need and what parts would give it the best performance as possible if you know let me know...Thanks guys!