Ecotec le5 Turbo 2.4 Build (Page 2/28)
4thfiero JUL 16, 05:22 PM
Call him and ask yourself. There's a lot of garbage info on the inet about what certain ecotecs have and what they dont have.
4thfiero JUL 16, 05:45 PM
Im reading that late model lnf's use a smaller displacement 2.4 block to have VVT? but there basically the same block. cept the LE5 has better low end torque. So i would still pick the LE5. The early LNF's and LSJ's didnt have VVT. according to a dealer i spoke with.

Also 06-07 blocks have forged steel rods and internals, (not the crank though i think) which is how there boost ready. But super easy and simple to find good forged cranks and stuff for this block.

Lastley, apperantly the LNF is okay to tune for the stock ecu? (if im understanding it right) but to go to s stand alone system? which makes throwing it into the Fiero 1000 times easier? It doesnt like that, and tuning becomes a pita....the only ppl i know of that makes a kit is bosch, and its 10k, and alpha fab. but again. a pita to tune with both kits. Also there SUPER pricey and hard to find.

i read some guys like putting the LNF crank into an LE5 and building it that way. if u search the ecotec and cobalt forums. A lot of guys are choosing the LE5 as the smart build, better cost, better power and low end torque, "no replacement for displacment" lol. easy to find and tune.

most of the ppl that choose the LNF have cars like cobalts and solstices that can swap over the stock vehicle harness and ecu. and wish to keep there cars stock and have the 'cool factor' of an LNF.

[This message has been edited by 4thfiero (edited 07-16-2014).]

4thfiero JUL 16, 06:35 PM
Just got an email back from alpha fab regarding the vvt.

"The 2.0 LSJ does not have vvt, the 2.0 LNF does. However , because the lnf uses a Bosch controller that utilizes torque management only about oh I don't know less than half of the maps have been unlocked in HPT. This includes the cam tables. So the ability to dual in the vvt is limited"

Hope that answers that.
Will JUL 16, 08:37 PM
LNF's have had DI, VVT and turbo from day one. The synergy of those three technologies is such that it would be stupid to build an engine with just two.

Trifecta can do LNF (and LLT) tunes... But of course Alpha, whoever they are, won't send you to their competitor when they can just tell you it can't be done (and you'll believe them... :-/ ) instead.

Will a N/A 2.4 have more low RPM torque than a 2.0? Of course it will. Will a port injected 2.4 spool a turbo better than a DI 2.0? Tougher question to answer. It wouldn't surprise me at all if the LNF and factory controller spooled a turbo better than the LE5.

Stop calling powdered metal rods forged; they're not. The only engines GM builds that don't get powdered metal rods are the LS7 and the LS9 (and they get titanium).

I would be surprised, to say the least if the LE5 actually had forged pistons. There isn't a reason for them to have forged pistons. Even the LNF and LSA have hypereutectic. The LS9 gets forged pistons.

[This message has been edited by Will (edited 07-17-2014).]

dobey JUL 16, 10:06 PM
Almost current GM engines have "semi-forged" connecting rods. Whoever said "semi-forged" though is just using the wrong term and trying to make it sound like they are closer to fully forged rods than they are. They're sinter forged from powdered metal.

Anyone who says "semi-forged" either doesn't know what they're talking about, or can't remember the term "sinter" properly.

Listen to Will. Like he said, the only production engines from GM currently getting any special rods or pistons are the very high performance V8s, like the LS7, LS9, and the new LT4.
dobey JUL 16, 10:13 PM

quote
Originally posted by 4thfiero:
Im reading that late model lnf's use a smaller displacement 2.4 block to have VVT? but there basically the same block.



What the heck does the block have to do with having VVT? The Ecotec is a DOHC engine. VVT is all in the head, cams, and ECM tune.

All Ecotecs are "basically the same block," just as all Gen IV LSx V8s are basically the same block. Well, except the "Ecotec" V engines in different markets, which are just a slightly odd reuse of the brand, and the only relation to the Ecotec 4 cylinders is that they might have SIDI and VVT (but they don't necessarily).
wftb JUL 17, 02:12 AM
the only thing I would like to know about the LE5 is if it has the weak ring lands like the stock 2.2's do .That is the real glaring weakness of the 2.2 bottom end , not the rods .I have never seen a picture of the LE5 piston to see if it has the beefier top ring land or not .Will be very interesting to see how your set up works out .are you using air to air or air to water intercooler ? air to water takes up less space and cools better from my experience having had both on my car .
4thfiero JUL 17, 10:57 AM
Whatever im not here to argue my build, if you have issues with my terminology go and call alpha fab yourself, im not a tuner and im only doing my best to reiterate what i was told, they are the experts and are much better at explaining this stuff than me as to why they picked the LE5 as there block of choice. Im super pumped for my build and for the choices iv'e made. If someone else wants to try a 2.0 swap? be my guest. but im doing le5.

WTFB: It is my understanding that the bottom end will hold up just fine, alpha fab has tested and tested these blocks to 400hp with stock internals. But like i said, im the kinda guy who would like to upgrade the internals anyways in a few years, bcc some of the internals are not forged, some are, but some arnt, hense my term semi-forged, im sorry that might not be the correct term...man it just seems like some ppl on this forum are just WAITING like a crouched lioness to punch on someone if they say one thing wrong. Calm down. and who knows, MAYBE if they come out with a good proven stand alone kit for the 2.0? then i will consider switching, but i doubt it. I like the bigger displacement and the better low end torque. Anyways im done with this subject. onto the build!

The shop is looking into ways to mount the IC and turbo since the turbo wants to hit the trunk bulkhead, and i really dont wanna sacrifice my trunk space for the turbo or IC. Right now i have an air to air IC setup. but depending what they see today, i'll ask about the water to air you suggested.
dobey JUL 17, 11:22 AM

quote
Originally posted by 4thfiero:

Whatever im not here to argue my build, if you have issues with my terminology go and call alpha fab yourself, im not a tuner and im only doing my best to reiterate what i was told, they are the experts and are much better at explaining this stuff than me as to why they picked the LE5 as there block of choice. Im super pumped for my build and for the choices iv'e made. If someone else wants to try a 2.0 swap? be my guest. but im doing le5.

WTFB: It is my understanding that the bottom end will hold up just fine, alpha fab has tested and tested these blocks to 400hp with stock internals. But like i said, im the kinda guy who would like to upgrade the internals anyways in a few years, bcc some of the internals are not forged, some are, but some arnt, hense my term semi-forged, im sorry that might not be the correct term...man it just seems like some ppl on this forum are just WAITING like a crouched lioness to punch on someone if they say one thing wrong. Calm down. and who knows, MAYBE if they come out with a good proven stand alone kit for the 2.0? then i will consider switching, but i doubt it. I like the bigger displacement and the better low end torque. Anyways im done with this subject. onto the build!



Nobody is waiting to "pounce" all over you saying the wrong things. Don't take responses correcting your incorrect statements so personally. Learn from them instead. If you don't want to learn, then say "I don't know, and don't care" instead of trying to act like you know, and then getting upset later when people correct you. Everyone else is calm. You're the one getting upset over it.

The LE5 does not have any forged internals. The crank is cast, the rods are sintered from powdered steel, and the pistons are hyperteutectic.
4thfiero JUL 17, 11:35 AM

quote
Originally posted by dobey:


Nobody is waiting to "pounce" all over you saying the wrong things. Don't take responses correcting your incorrect statements so personally. Learn from them instead. If you don't want to learn, then say "I don't know, and don't care" instead of trying to act like you know, and then getting upset later when people correct you. Everyone else is calm. You're the one getting upset over it.

The LE5 does not have any forged internals. The crank is cast, the rods are sintered from powdered steel, and the pistons are hyperteutectic.



Then pls post better yourself with better corrections and word choices, some posts are coming off as super condescending, like you want the world to see your car gods. I respect your knowledge and i appreciate the corrections. but to say 'someone who says semi forged doesnt know what there talking about?" thats condescending, im sorry if im coming off as not calm, ive just ran into SO MANY ppl critiquing my projects, calling me an idiot for wanting to mod my front bumper to mimic an 92 rx7 for example (which was done btw) other "professional" mechanics who said an ecotec swap cant be done easily...ive just had it with condescending comments. If ppl dont want to help in a HELPFUL way, then just stay out of stuff...it so anoying.

Ive never heard of the term sintered before. But i looked it up. the diff seems very minor between that and forged. here's what i found, but what exactly is the diff? They seem to do the same thing just different ways?

http://rennlist.com/forums/...ged-sintered-uh.html