Re: Need advice: LS ENGINE SWAP
 

If you use a Corvette filter/regulator, then yes it should be at 58psi.

Re: Need advice: LS ENGINE SWAP
 

That applies to the FF's as well? I thought all the FF's had the lower reg? LOL dammit I thought I had learned something from last time.

Re: Need advice: LS ENGINE SWAP
 

where can I get one of those ? Summit ? is there a certain model or part # ?
thanks in advance.

Re: Need advice: LS ENGINE SWAP
 

33737 is the one i just bought, since i messed my first one up

Re: Need advice: LS ENGINE SWAP
 

btw....mine should be firing up tonight:metal::metal::metal:

Re: Need advice: LS ENGINE SWAP
 

Thanks brother !!
Right on man ! :metal: hope it works without any troubles for you hopefully in a couple of weeks I will be saying the same thing !

Re: Need advice: LS ENGINE SWAP
 

no problem man....and me too

Re: Need advice: LS ENGINE SWAP
 

it's not just the regulators that are different on the flex fuel motors. the injectors are different too.

Re: Need advice: LS ENGINE SWAP
 

The old vacuum regulated return style fuel rails will pull down the PSI, and it may be low on the newer stuff too with a factory pump, but the Corvette filter/regulator is set at 58psi, so as long as your pump puts out that much, that's what you'll have at the rail.

I'm aware of this, but was trying not to confuse the kid. ;) They will work with regular fuel fine.

Re: Need advice: LS ENGINE SWAP
 

heck im confused! i was told that if you run FF injectors, you gotta run the FF regulator. correct me if I'm wrong please. I'd have loved to run the corvette filter/reg system on my FF motor.

Re: Need advice: LS ENGINE SWAP
 

Ok im getting excited its comming down to D Day but I need to confirm with all the pros out there first on all I should have ready before I begin. We will be pulling the engine this weekend and I would like to do some clean up on the firewall and front frame once its out I know I may need some tbss manifolds because mine wont clear, I have the DD mounts and my wiring harness should be in some time next week If you guys can tell me what else I should start ordering or have ready it would really help me out ! I will start posting some pics as soon as I get the party started but I cant do it with out your guys help I just basically need to know what else I need so we can keep moving. I got all next week off work so I can get alot of the work done and burn some midnight grease...thanks everyone so far you have all been so awesome ! :)

Re: Need advice: LS ENGINE SWAP
 

Way cool thread.. I'm watching and learning from you guys..

Re: Need advice: LS ENGINE SWAP
 

Thanks trkfrk ! makes at least two of us lol :metal:

Re: Need advice: LS ENGINE SWAP
 

I copied this from an LS1tech post posted by Brenden from LT1swap.com

The fuel pressure specs are straight out of GM Service Information online service manuals.

"1999-2003 4.8, 5.3, 6.0 all had a fuel rail with 3/8" supply line and a 5/16" return line. The fuel pressure regulator is on the fuel rail, and has a vacuum line to the intake manifold. In 2004, All engines went to a single 3/8" supply line, with NO RETURN LINE (returnless) except 5.3L L59 Flex Fuel vehicles. For 2004, Flex fuel engines KEPT the return line, BUT used a fuel pressure regulator with a lower pressure ratting. 2005 5.3L L59 Flex Fuel engines switched to a single 3/8" supply with NO RETURN line in 2005. Non flex fuel engines, fuel pressure spec is 55 to 62 psi with vacuum line disconnected, fuel pump running. 5.3L Flex Fuel engine 2004 and back, 48-54 psi with vacuum line disconnected, fuel pump running. 2005+ with returnless fuel rail all shared same fuel pressure spec, 55-62 psi. There is no vacuum reference on these, so fuel pressure should remain constant under all operating conditions. The computer is programmed differently for fuel flow rate depending on type of fuel rail. This is important to know when having a PCM programmed."

Re: Need advice: LS ENGINE SWAP
 

Thats awesome information LS1 ! I need to make sure fuelinjectionconection knows this information before he flashes my computer !

Re: Need advice: LS ENGINE SWAP
 

Did you buy a harness? Or getting the one you got cut down?...fuel system? Ecu tuning? You need all your specs and what not when you get your tune...mines about road ready...gotta figure out linkage...I know we've been following each other's builds but I think I'm winning lol

Re: Need advice: LS ENGINE SWAP
 

I am buying one from fuel injection connection and he will be doing my ecu.
Dennis, whats next after that engine is in home plate ? fuel system ? I know you got a kit for your lines I got to find that thread unless you can send me a link ?

Re: Need advice: LS ENGINE SWAP
 

Dman ! haha ! you got me beat by a looong shot !

Re: Need advice: LS ENGINE SWAP
 

did you get a harness with your engine? if so i have a guy that does a good job with harnesses, as far as the fuel system, the kit was awesome, a lot of extra parts after done with it, but you still have to buy other things...i but some hard lines...just to make it easier and straight cut looking, I'm pretty sure the kit is in my thread somewhere, if not ill find it for you, what you mean by home plate? finally done?

Re: Need advice: LS ENGINE SWAP
 

maybe just a little lol

Re: Need advice: LS ENGINE SWAP
 

I do have my harness

Home plate as in sitting on its final resting spot.

I havent bought my harness yet but did email them saying Im ready to order waitng for him to call me tomorrow...was your guy expensive ? were all your connectors labeled ?

dont worry about it I will go back on your thread and find that fuel kit was going to look at braided fuel lines anyway but I think your route was more my budget.

Re: Need advice: LS ENGINE SWAP
 

the engine is in its final resting spot, but as far as upgrades i just want it to be reliable for the moment, maybe someday cam swap or something along that line, with the increase in power and better gearing I'm sure ill be happy with it for a while...

the guy i went with charged me 200 for the cut down, labeled all my connectors, and answered every little stupid question i had and then some (some questions not even related to my harness) the guy was awesome, but if you decide to try him out id hurry, he is about to hit with a lot of business, awesome guy, i will be using him again when i do my next swap...and as far as questions go he answers his phone and email but i usually called him, and if he don't answer he calls right back pretty soon, and for my tune i used LT1swap.com, that guy was pretty awesome too...he answered questions too and has fast shipping

as far as the braided lines that was way outta my budget until i got to this job at the parts store, i got everything i need to make them there, i may make a line fitting but not sure, but right now i have that option, havnt decided yet tho..

Re: Need advice: LS ENGINE SWAP
 

how much was the other harness and tune gonna cost you?

Re: Need advice: LS ENGINE SWAP
 

No I meant, once my engine is on its final resting spot. I guess what Im trying to say is once I remove my old engine then drop my new engine, is the next step Fuel and fuel lines ?

As far as your wiring harness guy I would love to at least talk to the guy if you could PM me his number that would be awesome...thanks, I will check out LT1swap.com as well

how much more was it for the braided ? I gotta go back and reread your thread

Re: Need advice: LS ENGINE SWAP
 

$860.00

Re: Need advice: LS ENGINE SWAP
 

The only problem with these guys is its really hard to contact him by phone seems like emails are his best contact route...but I love his harnesses seems like he has a great product and was also recommended by BR3.

Re: Need advice: LS ENGINE SWAP
 

ya i totally agree, i talked to him, i got his info from another member, but ill pm you his info, his email is in my thread somewhere, he commented on it...

as far as my build it was a lot of waiting on parts so mine might have been out of normal order so to say but still went in pretty good, also a lot of it was me being out of my comfort zone (fuel system being one) delaying the process, but after doing everything id say just do it!! don't be scared its not bad after you start doing it..you can see my threads and asked a lot of questions about everything...which helped a lot

as far as the braided line i think it was more than twice as much to do, 3 times if i had a guy do it...so ya i just used the nylon line and covered it with regular line for heat purposes

Re: Need advice: LS ENGINE SWAP
 

holy freakin S(*$!!!! a lot of cash!!!!!!

Re: Need advice: LS ENGINE SWAP
 

I know Im starting to rethink this

Re: Need advice: LS ENGINE SWAP
 

for 860 bucks i better have a lifeline where i can reach him with thoughts!!!! and get replies!!! just the help that warren (aka harness guy) lol was worth it

Re: Need advice: LS ENGINE SWAP
 

Thanks ! maybe I can call and talk to him tomorrow... maybe save me some cash, sounds like he did a good job on yours and your saying good things about him, and those are big positives !

Re: Need advice: LS ENGINE SWAP
 

i just pm'd you, cash was a big deal for me, i was put over budget a bit with gears and misc stuff... but stuff like this helps out a ton!!!!!

Re: Need advice: LS ENGINE SWAP
 

keep in mine if he don't call you back right that second that he is a few hours behind you, and he will call back...we are way over here on the east coast lol

Re: Need advice: LS ENGINE SWAP
 

PM,d you back thanks and yes this starts getting very expensive...I feel your pain lol !

Re: Need advice: LS ENGINE SWAP
 

sending him am email too

Re: Need advice: LS ENGINE SWAP
 

The harness portion is about $450-600 of that, depending on how its setup. For that money, the guys at FuelInjectionConnection make a damn nice harness, thats very easy to install.

I don't know about their tuning, but I assume he's supplying you an ECU for the price? When you break it down,

860
-125(cost of buying an ecm)
=735
-125 (tune)
=610
-550(harness)
= ~60 shipping/tax/misc

If you figure thats all estimates, but if it works out.


If any of yall are in the upper midwest, I can get ur stuff tuned locally for cheaper (but then I own your soul, so its a give/take)

Re: Need advice: LS ENGINE SWAP
 

I think he uses email to screen out the free-information diggers lol. When I had my order in, he included a phone number on the reciept to the shop, and I was able to get him on the phone. Its just a couple of guys in a warehouse full of wire and injectors.

Re: Need advice: LS ENGINE SWAP
 

I dont mean to crash in on your post but Im in the beginning stages of what you guys are doing. Im getting ready to pull my 350 and replace it with a setup from an 04 tahoe. Can I please get that info on the guy wo does the harness re-wireing? Thanks

Re: Need advice: LS ENGINE SWAP
 

Dman got it from PSI.com. Nice work, btw! One of the frontrunners in my project.

Re: Need advice: LS ENGINE SWAP
 

I got my tac harness from them (and just incase I got the wrong one from them again I got one from a guy on here) my engine harness got done from a guy here locally