Official 1.8 Info & FAQ thread

[JimmyQ]

Gotcha seems pretty straight up though, I need to do that to many Honda ricers around me..

 

[lambertsonic]

Lots of great info in This thread ! Thanks or Sharing .

 

[AustinK]

well let me explaine how i got the 20 then you can make your own opinion.

i did tune, installed exhaust and went to the dyno. that didnt work well as they didnt keep the car cool and it ran bad #'s

took my car cooled it off and the next day i ran stock tune on a phone app that reads obd2 data like ultragage. ran a 150hp, tuned her back to preformance and ran a 170, and had some readings in the 180's but they were not so constant so i dont count them, now with tune exhaust and intake i see 190

Nice! How much did the tune set you back? Im trying to decide buying one or get lowering springs... Any suggestions?

 

[doreo]

Depends what you want out of your car, if you want more handling then springs if you want more hp and the ability to support future engine mods then tune, the tune I think was around 3? I forget honestly

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[Deliboy]

I got the 1.8 tune on the group buy for $260 which included the cable. Unfortunalty you missed out on that and they may have one on the 4th of July. But the next likely deal is Black Friday in November. Full price for the 1.8 is $230 (i believe) for the tune and $150 for the cable.

 

[doreo]

i would go ahead and assume the next sale is going to be black friday time

 

[Ryanizzle]

Anyone know what rpm the 1.8's vvt kicks in? I always assumed between 4-5.5, it feels like 5 but I wanna know the official number

 

[rdss]

You will need to get a scan tool that will display cam angle

 

[Luv2xlr8]

My vtec kicks in at 5800rpm. lol Seriously tho, the car comes with 138hp and if you get the exhaust, intake and the tune, i can see about 140 at the wheels or approx 160-170 at the crank. Until there is a dyno graph indicating those actual numbers, ill just wait and hold on a bit.

 

[Deliboy]

My vtec kicks in at 5800rpm. lol Seriously tho, the car comes with 138hp and if you get the exhaust, intake and the tune, i can see about 140 at the wheels or approx 160-170 at the crank. Until there is a dyno graph indicating those actual numbers, ill just wait and hold on a bit.

Eh, actually the 1.8 is more like 109 HP at the wheels stock. Check Injens website, they have a stock 1.8 dyno along with their intake dyno.


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[laborsmith]

Dyno graphs have been posted or linked.

I will leave it to your imagination to figure out how to find them.

Laborsmith

 

[mitdr774]

Some quick looking around resulted in this. Notice the connecting rod information.

Type: 1.8L I-4 Fam1 Gen3 ( LUW )
Displacement: 1796cc ( 110 ci )
Engine Orientation: L ( longitudinal ) T ( transverse ) T
Compression ratio: 10.5:1
Valve configuration: Dual Overhead Camshafts (DVCVP)
valves per cylinder: 4
Assembly site: Bupyeoung, Korea or Toluca, Mexico
Valve lifters: Direct acting tappet with hydraulic lash adjuster
Firing order: 1 - 3 - 4 - 2
Bore x stroke: 80.50 x 88.2 mm
Bore Center: ( mm ) 86
Bore Area: ( cm2 ) 203.61
Fuel system: Sequential fuel injection
Fuel Type: Regular unleaded
Applications: Horsepower: hp ( kW )
Chevrolet Cruze 138 hp ( 103 kW ) @ 6300 rpm SAE Certified
Chevrolet Sonic 138 hp ( 103 kW ) @ 6300 rpm SAE Certified
Applications: Torque: lb-ft. ( Nm )
Chevrolet Cruze 125 lb.-ft. ( 170 Nm ) @ 3800 rpm SAE Certified
Chevrolet Sonic 125 lb.-ft. ( 170 Nm ) @ 3800 rpm SAE Certified
Maximum Engine Speed: 6500 rpm
Emissions Summary: GM System 0 Engine Management System with E83 ECM
Federal: Tier 2 BIN 4
California: BIN 4 ( ULEV2 Qualified )
MATERIALS
Block: Cast Grey Iron ( hollow frame )
Cylinder head: Cast Aluminum
Intake manifold: Composite
Exhaust manifold: Fabricated Stainless Steel Maniverter 4-1
Crankshaft: Cast Nodular Iron
Camshaft: Cast Chilled Iron
Connecting rods: Forged Steel
Additional features: Double Continuous Variable Cam Phasing ( DCVCP )
Varible Two Step Runner Length Intake Manifold
Electronic Throttle Control
Electronic Controlled Cooling System
Hydraulic Tappets
Cylinder Selective Adaptive Knock Control
Engine Oil Cooler with Individual Piston Cooling Jets
Individual Coil on Plug High Energy Ignition
Extended Life Coolant
3 Layer Sheet Metal Cylinder Head Gasket
Belt Driven Camshaft
Long life (100,000-mile) spark plugs



"Like the pistons, other reciprocating components in the 1.8L were developed for an optimum mix of strength, balance and low weight. The result is less reciprocating mass inside the engine, increasing efficiency and enhancing the tactile feeling of performance as the engine builds revs.

The steel connecting rods incorporate a larger, forged I-beam cross section for added strength, without increasing weight."


All information from GMpowertrain.com

 

[$ub$onic]

Is all I'm going to say
And with the piston cooling jets the cylinder temps should stay stable

 

[stoopid]

It's still going to be a while until BNR has that turbo ready for mass consumption.

 

[mitdr774]

The MLS head gasket and forged rods leave the pistons as the primary fail point. That being said, the 2.2l L61 Ecotec has been show to hold up very well at 250+ WHP levels on stock pistons. The rods are the failure point in that engine.

 

[$ub$onic]

With this being said GO 1.8 TURBO!

 

[Eric Smit]

good to see you guys have some go fast parts. forged rods are important.


-Eric Smit

 

[SonicBoy24]

Scared yet Mr. Smittyy?

 

[Eric Smit]

not even a little.


-Eric Smit

 

[CoryStrat]

This thread had been going very well for anything to do with the 1.8...

Lets keep it that way by not asking if the 1.4 can keep up to the task of a 1.8, please.

No offence- but we've all got better things to do with our lives than open up this can of worms on our screens, again.

Thank you.



"You're hilarious. Almost makes me want to listen to you."
-Eric Smit