Motor Identification

[LS1ow]

Ive been exchanging texts with one of my friends that owns a shop (Audi Specific) about a motor he got laying around. But im a little lost on figuring out what motor it accually is. So heres what he tells me...

Iron Block 5.3
Out of a 07
243 cast heads

apparently its completely stock. never touched never opened up. so thats what confuses me.

[KirkEvil]

I know the silverados and such around that year have the 5.3 with 243 heads, but I dont think its an iron block.

[S.J.SLEEPER]

they are almost all iron blocks...very few have aluminum if any that I have seen.

[KirkEvil]

Quick google search says Curt is right about most being iron blocks. I guess my dad got lucky with his van getting an aluminum one. More info on 5.3l block differences:

http://www.gm-trucks.com/forums/index.php?showtopic=95383&st=0

[sweetbmxrider]

Yeah most any that I have worked on are iron.

[S.J.SLEEPER]

the aluminum blocks are very rare in the trucks, only ones I know of have been in trailblazers, Canyon(i believe) and a handful of vans/tahoe/suburbans.

They big man BiGal should be able to tell everyone what the deal is.

[Featherburner]

The SSR and some 1500 4wd pickups had them, Buick Rainier too.

[sweetbmxrider]

Its either an LY5 or LMG if it was a flex fuel truck.

[LS1ow]

so is it a decent motor? its got 35k on it...


but hows that gunna work with the flex fuel ? the motor would be for my car...

[LS1ow]

flex fuel = cyls shut off when not needed or can run E85 or whatever ?

sorry, im not shure which one it is

[coolmanvette75]

Pretty sure its e85

[sweetbmxrider]

so is it a decent motor? its got 35k on it...


but hows that gunna work with the flex fuel ? the motor would be for my car...

I'm not all too familiar with it but it would be for e85. Shouldn't really affect you though especially if you are using an fbody computer. I really don't know much about the differences, if there are any significant ones.

[coolmanvette75]

Not 100% but I think flex fuel cars use different injectors/fuel rail

[LS1ow]

Not 100% but I think flex fuel cars use different injectors/fuel rail

well its got 243 heads, so id be using my LS6 set up on it.


So this is what i would like to to.... Use the heads/bottem end from the 5.3, bolt up my LS6 intake on it, and use the harness out of my LS1 Car ? will the LS1 harness run the 5.3 ?

[WildBillyT]

I'm not all too familiar with it but it would be for e85. Shouldn't really affect you though especially if you are using an fbody computer. I really don't know much about the differences, if there are any significant ones.

I wonder if there's actually a benefit somewhere because you have to move more E85 to make equivalent power to gas.

[sweetbmxrider]

Yeah I was wondering the same. It's probably no difference :lol:

[Jersey Mike]

I'm too lazy to look this up or confirm it, but I though the FlexFuel cars would swap to only 4-cyl or something on the highway when cruising, and then when you're on the gas you get full power.

Hound BigAl for an answer.

[sweetbmxrider]

Doesn't matter if he's using his computer. If he's using his ls1 top end, rest is negligible too. There might be a couple sensor differences though but I'm sure its doable.

[Anti_Rice_Guy]

I'm too lazy to look this up or confirm it, but I though the FlexFuel cars would swap to only 4-cyl or something on the highway when cruising, and then when you're on the gas you get full power.

Flexfuel and AFM are completely different things. One can change the tune to run e10 - e85, and one shuts off half the motor.

[Jersey Mike]

Flexfuel and AFM are completely different things. One can change the tune to run e10 - e85, and one shuts off half the motor.

I say Potato, you say Active Fuel Management, let's call the whole thing off.


But in all cerealnes, I totally forgot about AFM. Good call.

[LS1ow]

wait... so 5.3 bottem end, 243 heads, LS6 intake, LS1 Computer/Harness is a work able combo ?

id imagine using the LS1 computer would make eliminate the Flexfuel stuff.... even thou it would be nice to be able to just toss some Corn in there :)

[BonzoHansen]

sensors & throttle & reluctor ring tooth count need to match your harness & ecm correct?

[LS1ow]

cmon guys, srs thread is srs.

i really need help knowing if this will work.

The plan as stated again...

5.3 Iron Block
243 Heads
LS6 Intake/TB
PCM/Harness/Ect from LS1 Camaro

[BonzoHansen]

reluctor wheel is key. what crank sensor is in the block?

[LS1ow]

reluctor wheel is key. what crank sensor is in the block?

i would think its got a 58x ?

no idea what crank sensor is in there... stock i would presume. both motors aparently were never touched

[LS1ow]

noone got anything else to help ?

[sweetbmxrider]

http://ls1tech.com/forums/conversions-hybrids/1427324-iron-block-low-mount-alternator-diy.html

http://www.thirdgen.org/techboard/ltx-lsx/493660-fitting-truck-motor-into.html

http://ls1tech.com/forums/generation-iii-internal-engine/1496937-will-motor-work-my-camaro.html

http://www.superchevy.com/technical/engines_drivetrain/accessories_electronics/0405sc_gmdod/index.html

[V]

some basic info about flex-fuel... It seems any "special" parts are in the fuel system.

E85 ethanol is used in engines modified to accept higher concentrations of ethanol. Such flexible-fuel vehicles (http://en.wikipedia.org/wiki/Flexible-fuel_vehicle) (FFV) are designed to run on any mixture of gasoline or ethanol with up to 85% ethanol by volume. There are a few major differences between FFVs and non-FFVs. One is the elimination of bare magnesium (http://en.wikipedia.org/wiki/Magnesium), aluminum (http://en.wikipedia.org/wiki/Aluminum), and rubber (http://en.wikipedia.org/wiki/Rubber) parts in the fuel system. Another is that fuel pumps must be capable of operating with electrically conductive ethanol instead of non-conducting dielectric gasoline fuel. Fuel-injection control systems have a wider range of pulse widths to inject approximately 34% more fuel. Stainless steel (http://en.wikipedia.org/wiki/Stainless_steel) fuel lines, sometimes lined with plastic, and stainless-steel fuel tanks in place of terne (http://en.wikipedia.org/wiki/Terne) fuel tanks are used. In some cases, FFVs use acid-neutralizing motor oil. For vehicles with fuel-tank-mounted fuel pumps, additional differences to prevent arcing (http://en.wikipedia.org/wiki/Electric_arc), as well as flame arrestors (http://en.wikipedia.org/wiki/Flame_arrestor) positioned in the tank's fill pipe, are also sometimes used.

[V]

http://ls1tech.com/forums/conversions-hybrids/1476547-running-5-3l-truck-engine-ls1-intake-5-7-injectors.html

more random info about 5.3s here
http://www.fbparts.com/ls_general_info.htm
24x reluctor wheel till 2006, then went to 58x

[sweetbmxrider]

I was also reading the crank is longer in the gen 4's so you can't run a t56 and will have to properly shim etc for flexplate/converter/starter alignment.

[LS1ow]

it doesnt seem like its so far fetched... i think i going to pick this up.

[KirkEvil]

There are a few guys on tech that did budget builds with ebay turbo kits and made very respectable power with the 5.3 motors

[coolmanvette75]

Yea one guy has an rx7 in the 8s with a junkyard 5.3 shortblock with 100k on it...

kAIce--rrdU

[BonzoHansen]

The new camaro performers has an article on swapping from an ls1 to an ls3 using the ls1 ecm