newt

iTrader: (2)

Hello All,

It is a slow day at work so I figured I would start my build thread for 2011.

This motor will be going in my 2005 Sunfire.

"LEJ" Build:

LE5 Bottom End
LSJ Head - Race Ported by Mike @ AMMFAB
Si +1mm Valves
Comp Stage 2 NA Grind Cams
Supertech 78lb Valve Spring Kit
Golden Eagle Head Studs
89mm LSJ Head Gasket
LZM Balance Shaft Delete
GMR Oil Pump Gears
LE5 Intake Manifold
Stock 2.2TB Bored to 62.5mm
4-1 Long Tube Header with Stepped Primarys - Built by Mike @ AMMFAB
Summit Racing 3" Cut-Out
QTP 3" Electric Cut-Out Plate

This should put the motor around ~11.3:1 compression, gonna run it on 91 pump.

I built this motor in desktop dyno (for those that don't know what that is, google it) and it should make in the neighbourhood of ~260bhp, so about ~220whp.

Hoping to run a 12.xx with this set-up.


A bit of a summary about the rest of the car (some mods current, some to be installed):

F23 Trans with Quaife LSD
Grand-Am Aluminum Lower Control Arms
Koni Yellow Struts
Ground Control Coilovers
22/9.0-13 M&H Drag Slicks
Bogart 13x8 Aluminum Race Wheels
N2MB WOT/2-step Box
Full Poly Motor/Trans Mounts
Interior Delete
AC Delete
EVAP Delete
Weight Reduction


I don't have many pictures as of right now, but I will post more once stuff starts showing up.

Quick teaser pic of the header tho..




Thats all for now.

07BoostedG5

iTrader: (12)

nice...

Leafydialupking

iTrader: (1)

phew I was afraid it was going to be blown. Then I would have cried because you would have copied my build idea. You dont think custom cams or at least stage 3 would be better?

newt

iTrader: (2)

LOL ya I think alot of LE5 bottom ends will be poping up soon, for the J-Body guys anyways.

Ya a different set of cams would be alot better, I already have the Stage 2's tho, I ran them all last year in the motor I have in the car now.

If I buy new ones I will get custom ones made, but I wanna keep it streetable for now and if I got custom cams they would be big. Maybe next year, or perhaps at the end of these season, for now tho I'm gonna stick with the Stage 2's and hope for the best.

Leafydialupking

iTrader: (1)

They wont be that big, you can only rev the 2.4 bottom end to 7 grand. Or at least that's what I've been told.

And I'm sitting here in desktop dyno with the AMMFAB head and the le5 bottom end with the defualt high performance street cam (like 550 lift and decent duration) And I really need to figure out the stock crank pulley size so I can put a real number in for belt ration on the blower. Its not 2:1 like I thought else I'll be making 400 horse at 7 grand and If I would rev out to 9500 like turbo tim and his ca rthat was built by zzp I could make 531, lol.

blewis13

iTrader: (3)

That's a pretty serious header set up. Good luck with the build

D-mac

iTrader: (5)

Nice collection of goodies there

but

"***** Weak" LOL

newt

iTrader: (2)

Desktop dyno FTW!!

LE5 bottom end would probably hold 8000rpm if you really wanted to push it. I think the piston speed is 5100fpm at 8000rpm.

Depending on my power band I'll push this to 7800rpm if I have to.

The factory forged bottom end should hold, I rev'd my L61 to 7500rpm all year and it was fine.

Leafydialupking

iTrader: (1)

I worry about rod and piston weights and how well the system's balanced.

newt

iTrader: (2)

From what I read piston speed seems to be the killer. We will see what happens tho, I believe the factory redline on a stock LE5 is 6900, so that's not much higher.

We will see what happens, worst case it blows up lol

elecblue06

iTrader: (1)

what year le5 did you get .. also why the ported 2.2 tb instead of a ported 2.4 tb? or wait nm you have a cavi which is cable throttle right? that would explain it less there is a way to convert a tbw to a cable throttle

good luck with you build i'm liking these builds i've been seeing

elecblue06

iTrader: (1)

i'm also guessing you dont have anything more then 91 where you are? i would recommend 93 or 91 + meth with that high of CR

Blowncavy

iTrader: (2)

Pics of the blue cavy please

newt

iTrader: (2)

There is no real way to convert it, since its controlled by the ECU I would assume? Even if it wasn't I'd need to change out my gas pedal, would be much easier to just swap to a larger GM TB off a V6 and make a custom adaptor plate.

The honda crowd seems to be getting away with 11-11.5:1 on 91 pump, hell my buddy ran 13.2:1 on 91 pump..lol With the cams and some colder plugs I think it should be fine, there isn't a single 93 pump in my city so its not really an option to run 93.

Not my blue cav, the guy who built the header used that car as a template, I'm not sure whos car that even is....sorry dude.


Thanks for the comments guys!

elecblue06

iTrader: (1)

remember hondas have much more efficient engines then we do

spike

subd

ebristol

iTrader: (4)

Where are you getting your pistons from?

newt

iTrader: (2)

How do you figure that? and what are you refering to when you say "efficient"?

HP per Liter has little to do with a motors ability to run higher compression on pump gas.

I'm using the entire stock bottom end from a 2.4, including pistons. The compression bump comes from running a 88mm bore block with a 86mm head as well as the thinner headgasket.

ebristol

iTrader: (4)

How did you figure that out? Can you lay out the math? I have been trying to figure out what CR a 88m bore and 86mm stroke (LE5 Block, LSJ Crank, LSJ Head) would produce but I am not smart enough...

ralliartist

Honda heads are far more efficient than ecotec heads. The path of flow is just far superior. That has a lot to do with why they can get away with higher comrpession.

elecblue06

iTrader: (1)

this

also i didnt see what year 2.4 you're using for the bottom end i'm hoping 06 or 07

newt

iTrader: (2)

To be honest "oldskool" did the preliminary math, I believe he used an online caculator. I put the approximate sign infront of the compression because untill I get everything here I can't accurately determine the compression. Google "compression ratio calculator" and you should be able to find what your looking for.

Forgive me for my ingorance here, but I am reluctant to believe that the path of flow of a head plays out to be a determining factor in the amount of compression you can run.

Do you have any info backing that up?

To me the greatest factors boil down to dynamic compression and cylinder temps.

newt

iTrader: (2)

I have yet to go get the motor (as the junkyard is 5 hours from my house) but yes, it will be a 06-07. The issue with the rod material changing in 08' came to light on J-Body.org during one of the members builds, so I'm aware of the issue.

Thanks for the heads up tho just in case!

ebristol

iTrader: (4)

I see. I was just wondering. It would be nice to get a bump in compression from the stock LE5 pistons on my potential build.

Ignore Ralli. He is here to derail your thread.

elecblue06

iTrader: (1)

as much as you think he might be trying to derail him.. he is in fact making a good point..

the increase flow characteristics will reduce cylinder pressure and cylinder temps which make it so a higher CR can be used safer.. hondas are built from the start to be high CR high reving motors.. and are built to do that.. ecotecs aren't just something to keep in mind. i just personally dont believe 91 will support 11+ CR with cams and such on an eco.. 91+meth that would probably help you get octane and cooling enough to make it run .. if i remember correctly the NA eco drag car runs like a 12 CR or something but they run straight meth lol