S10V8.com

S10_hotshot · #1 10-28-2009, 01:14 AM

hey guys, just got my v8 efi dime running and been driving for the last month and couldn't never been happier. Lately i've been batting around ideas on how i can make it better and thats when i thought of putting a LT1 in it. how hard would this be to do. i know i need a complete engine and trans with computer (made that mistake on the first go around). but i'm not sure about any thing else. the ac i don't really have to wory about since i don't have ac. i'm just looking for personal experiences and pointers. i'm not totally set on doing it, i'm just shooting ideas around..........and yes i know i need to update to a premium member, before anyone starts lol

Melonhead · #2 10-28-2009, 09:47 AM

Hey there Hotshot. LT1 has its good and bad. First off, a B or F body engine donor with accessories will put the a/c compressor at the passenger side frame. With the a/c delete pulley it will still be close to the frame. You will have to test fit the motor with the accessory bracket on to see how close you are. If you can't get the belt on or the delete pulley hits, you will have to notch the frame. Wiring is the biggest part of an LT1 swap. Current Performance is about the best out there. When you get a harness with them, it will come with the body harness connected where needed. It will be a simple plug and play and the dash will work. Next is fuel. If you are running a TBI system, your fuel pressure id too low to work with the LT1. The mod that was done to my truck was the stock pump was changed to a 96-99 Vortec fuel pump. The hoses along the fuel line route was changed to higher pressure fuel injection hose. The 3 lines that come out the front of the frame in the engine bay, I used the supply and return. I left the vent open. A compression to AN adapter was used at the hard lines. I used a braided line to connect the hard lines to the fuel rail. There are adapters you need for the fuel rail to use the AN fittings. They are available on Ebay.

I forgot to add that the computer will need to be flashed. It has VATS enabled that needs to be removed to allow it to work in a different vehicle. You may also want the speedo changed to match the tire size and gear ratio used to be accurate.

auroradan · #3 10-28-2009, 03:28 PM

Hotshot,

Do the LT1 swap, you won't be disappointed !! Like Kent said you will have to notch the frame for the AC pump, but it's not a big deal. I concur about the Current Performance harnesss, he built me one that plugged my 94 LT1 (cop car engine) into my 84 GMC S15.

I have a bunch of pics of my swap here: http://tinyurl.com/yvvu88

A-Dan

Melonhead · #4 10-28-2009, 03:38 PM

Hey there stranger. Been a while since you been on....

S10_hotshot · #5 10-30-2009, 02:51 PM

thanks for the replies guys. like i said i'm just throwing ideas around, since my TBI 355 is doing me well. i just kinda plan to upgrade down the road. my issues right now is just traction, but what s10 v8 hasn't been through that, Right? lol

Melonhead · #6 10-30-2009, 03:04 PM

You think you have traction problems with the TBI. Just wait till the LT1 is let loose. Just put this on for size. The LT1 was in a car that was about 800+ lbs heaver than the truck or blazer. The rear end ratio was a 3.23 and 26" tires. Put the LT1 with a 3.42 or higher gear ratio and a lighter truck and watch out.

race10boy · #7 10-30-2009, 07:21 PM

hey i got a ?. i got a 1989 s10. do u think its better to put in a camaro rear end or leave the stock s10 one in?. or can i take my 4.56 gears out of my camaro and put them in my stock s10 rear end houseing?.

Melonhead · #8 10-30-2009, 07:50 PM

If the 89 dime rear end is a 3 series carrier and the camaro rear is a 7.5 or 7 5/8" rear, yes the gears can be swapped. If the camaro rear is the older 8.5 with leaf springs, you can swap that under the truck. It is not a direct fit. The spring perches and the width or the axle is not the same as the dime.

S10_hotshot · #9 11-02-2009, 02:37 PM

Hey Kent, does your blazer(judging by your pic) have an lt1 in it? If so can ya tell me how your lines went from the fuel tank to the engine? mine wasnt routed through the frame like tradional s10s. mine went over the transmission. so what i did was cut my old fuel lines (old ones were damaged) and used 3/8 "not for fuel injection" hose on the outside of the frame, yeah somhow it hasn't blown a line yet. but since the fuel pressure is higher on an lt1 how do i route them? and also what size is the feed line and the return line?

auroradan · #10 11-02-2009, 03:31 PM

Quote:

Originally Posted by S10_hotshot

So what i did was cut my old fuel lines (old ones were damaged) and used 3/8 "not for fuel injection" hose on the outside of the frame, yeah somhow it hasn't blown a line yet. but since the fuel pressure is higher on an lt1 how do i route them? and also what size is the feed line and the return line?

Unless you are running a carb, I think not using high pressure fuel injection hose you are asking for trouble. If you are missing the original metal fuel lines that run inside the frame rails I would run to my fave wrecking yard and pull a set from a junker.

When I did the LT1 in my 84 I replaced all the short rubber hoses with new fuel injection hose and clamps made for the high pressures our pumps generate.

My 2 cents...
A-Dan