1.4L Teardown/Modification

[ChrisJ]

Safely. I do also plan to run e85. And 600hp cobalt ss at 40mpg..i believe that i don't think a 250hp 1,4 could manage that maybr down a hill idleing

Yeah ok,
600HP Cobalt getting 40mpg. Maybe down a steep hill for the entire tank with a 60mph tailwind..

 

[NewZJ]

Yeah ok,
600HP Cobalt getting 40mpg. Maybe down a steep hill for the entire tank with a 60mph tailwind..

He meant meters

 

[Stew]

Preloader,

Modifications and negligence pretty much voids your warranty with the dealership. I can not say for certain how your warranty stands, until you have a diagnosis from a GM dealership.

Erica Tiffany
Chevrolet Customer Service

Modifying, yes, but in all fairness I see no negligence here. In fact, quite the opposite, everything I see so far has been done willfully and with considerable care!

Now if it wasn't for that modifying bit...

 

[Preloader]

Neary, please join in on this thread as you get into your engine mod. I was browsing eBay earlier today and the 1.4's a plentiful. Even saw one with a trans and stock turbo for a tad over $1000 shipped.

8,000 rpm? 2 problems. The ECU falls off the map at about 7,200 so you may need a stand alone to accomplish that. Second problem, shifting at 8,000. Maybe you have an auto and that'll put you ahead of the game, but the M32 doesn't like to shift above 6k very gracefully.

As far as raising the CR, isn't that a bad idea if you plan to raise the boost? Or do you have a plan to beef up the ignition?

I'll be looking into stronger forged hardware, but I'm not ordering anything til I nail down the math. I plan to dyno with the new turbo, and then with the modified head. If I'm still not close to my 300whp target, I actually plan to get pistons to lower my compression so I can ramp my boost upwards of 30+.

 

[neary]

You are further along than me as of current. One of the options i planned to explore is the possibility of a standalone and an individual upgraded coilpack setup and sacrifice top end for a broad powerband and acheiving it through a slightly higher cr and a gt25. But my main thought is similar to yours big boost big numbers. are you going custom on the whole turbo setup? I was going to attempt to make a deal with the producer of the endtank usa kit. If i can get them down on price i would be willing to go to a dyno and do some r&d for them. For the record i have yet to find thrm or a good dyno tuner that can help me i too want to do it in stages. We are in uncharted territory we just dont know how to make numbers yet. Its a learning curve and I will be happy to be on the list of people that unlock what this motor is capable of. We have a great starting point iron block aluminum head 16v factory boost makes it ideal displacement is our only limiting factor. You will be the fastest 1.4 soon. Maybe i can be the fastest cruze, to the best of my knowledge i am already the lightest cruze(street legal anyway)

 

[Preloader]

Ha, my Sonic weighs 2,515lbs when track ready.

I am going custom for the whole set-up, which will likely include a bigger I/C.

I'm having my cast iron mani cut and flanged. And I can weld up my own exhaust..... likely 3". I am still considering the GT25, but I want to leave myself some headroom and may go with the 2854 or 2860.

Do you know how to read turbo maps? I don't think you can have both a GT25 and pull 8,000 rpm. Look at the map, it'll surge. You'll want to apply the 8k to the lbs/min airflow, and pressure ratio and see where thet meet on the turbo map. You'll be way out of the GT25 efficiency island if you plan to boost more than 25psi



Also, any chance you can do me a favor and break your posts into paragraphs? I'm getting a headache. Not tyna be a douche, it literally is hurting my eyes.

 

[sonic24740]

Preloader,

Modifications and negligence pretty much voids your warranty with the dealership. I can not say for certain how your warranty stands, until you have a diagnosis from a GM dealership.

Erica Tiffany
Chevrolet Customer Service

Classic.. I wonder if chevy is copying pics of are cars to see if they show up at dealers with major engine trouble... now lol

 

[Preloader]

Classic.. I wonder if chevy is copying pics of are cars to see if they show up at dealers with major engine trouble... now lol

I wouldn't worry...... All descriptions, photos and stories depicted here are fictitious and are solely the purpose of education and entertainment.

I just make this stuff up to sound cool online. In reality, my car is bone stock and has a 1.8L with an automatic transmission.

 

[Chrish051873]

I wouldn't worry...... All descriptions, photos and stories depicted here are fictitious and are solely the purpose of education and entertainment.

I just make this stuff up to sound cool online. In reality, my car is bone stock and has a 1.8L with an automatic transmission.

Funny stuff right there

 

[Chevrolet Customer Care]

There is nothing to worry about. I am here to assist with question and concerns.

Erica Tiffany
Chevrolet Customer Service

 

[ChrisJ]

There is nothing to worry about. I am here to assist with question and concerns.

Erica Tiffany
Chevrolet Customer Service

Fantastic.

How fast can the 1.4 turbo rev with stock valve springs without risking mechanical damage?

 

[Preloader]

7,000-ish. Somebody with a Cruze floated a valve and made piston contact at a little above 7k.

 

[ChrisJ]

7,000-ish. Somebody with a Cruze floated a valve and made piston contact at a little above 7k.

Gonna have to get some stronger springs eh?

 

[Dragcamaro]

great thread! ive been looking at exploded views for a while but its nice to see the stuff in metal. im a big fan of the bottom end girdle/main cap setup, I feel like crank walk wont be an issue. What do you think of the crank? I remember it being "cast reinforced" anything seem reinforced about it?

 

[Dragcamaro]

also im glad the timing chain setup is simple and doesn't have the water pump driven off it (like a bigger ecotec)

Its nice to see people getting into these. ive been kinda sad since I heard they were going to put the 1.6 in these cars, but at the same time, port injection instead of direct and some other attributes of this motor make it look like it has a lot of easy potential. Direct injector upgrades aren't cheap. top feeds are a dime a dozen (if only....)

 

[Preloader]

I too am pleased with the 5 bearing girdle.

Here you can see casting lines. The crank doesn't have any clear indicators that it is "reinforced", but I will say it is quite beefy for a 1.4.

Also, anybody notice that I never posted about the oil pump? That's cuz it took me a while to find it. It's a rotary pump built into the timing cover and driven by the crank shaft.

 

[ChrisJ]

I too am pleased with the 5 bearing girdle.

Here you can see casting lines. The crank doesn't have any clear indicators that it is "reinforced", but I will say it is quite beefy for a 1.4.

Also, anybody notice that I never posted about the oil pump? That's cuz it took me a while to find it. It's a rotary pump built into the timing cover and driven by the crank shaft.

Rotary with a fixed or rotating vane or vanes?
Sorry but that caught my attention as I've been doing a lot of reading on rotary pumps.

 

[Preloader]

Rotary still baffles me. I haven't opened it to get a better look, but how about I open it, snap some pics and you tell me?

 

[ChrisJ]

Rotary still baffles me. I haven't opened it to get a better look, but how about I open it, snap some pics and you tell me?

Sure, I'll try. Rotary pumps are actually really cool. Its what my 33 and 34 fridges use.

BTW, weren't older Buicks like the 3.8 built with the oil pump in the timing cover?


This is one type of rotary vane pump.
http://youtu.be/AFHogF-9eGA

The others often have a fixed vane which is spring loaded against the rotor which wobbles around as it spins. Kind of like this, though often fluid isn't pulled in through the vane, or as its called here, piston.
http://youtu.be/fEO8LEGfdgc

 

[Preloader]

Well, looks like fixed vane:

I'm loading up a vid: