port and polished cylinder head, and aveo turbo talk

xstevex · Post by **xstevex** » Sat Nov 10, 2007 1:39 am

wait so, I can boost my car to like 200 HP and no more than 200ft/lb of tQ and be fine?!?

The transmission can handle that? everone on aveoclub is saying the engine can handle around 160hp, and the transmission will break if it has more that 160ft/lb.

if I can make 200 hp with a turbo, then I'd probably want to go that way.

so should I get lower compression or think I could just run the stock 9.5:1 compression rods? or should I get like 8.5:1 CR?
If I get the lower CR...daewoomofo, can you help me with this? Do you have the tools and everything. The dealer quoted me at 1500 to install pistons (approx. 12 hours to do).

but if you say i can get 200hp, thats really awesome. Im just really worried about the transmission! Does Danny Boy's Corsa have the same transmission as the aveo too?

ahhhh i can feel it now 100hp more hahhaha

daewoomofo · Post by **daewoomofo** » Sat Nov 10, 2007 2:43 am

is your aveo an auto or manual?

jidasas · Post by **jidasas** » Sat Nov 10, 2007 3:11 am

Ok...as far as I know the aveo has the 4t40e auto trans. Here is the specs...look at MN4 to see what it handles.
You'll notice it says 190 lb/ft is the limit.

Hydra-Matic 4T40E / 4T45E Transaxle (MN4/MN5) What's
New Photo
Type: four-speed front-wheel-drive, electronically controlled, automatic overdrive transaxle with electronically controlled torque converter clutch
Engine range: 2.2L (MN4)
2.2L - 3.5L (MN5)
Maximum engine torque: 190 lb-ft (260 Nm) (MN4)
220 lb-ft (298 Nm) (MN5)
Maximum gearbox torque: 325 lb-ft (440 Nm) (MN4)
325 lb-ft (440 Nm) (MN5)
Gear ratios:
First: 2.95
Second: 1.62
Third: 1
Fourth: 0.68
Reverse: 2.14
Maximum shift speed: 6500 rpm (MN4)
5800 rpm (MN5)
Maximum validated gross vehicle weight: 2075 kg
7-position quadrant: P, R, N, OD, 3, 2, 1
6-position quadrant: P, R, N, D, 3, L
5-position quadrant: P, R, N, D, D3 (MN5, Malibu)
Case material: die cast aluminum
Shift pattern: (2) two-way on/off solenoids
Shift quality: variable bleed solenoid
Torque converter clutch: pulse width modulated solenoid control
Converter size: 245 mm (reference) (diameter of torque converter turbine)
Fluid type: DEXRON III
Transmission weight: dry: 74.7 kg (164 lb)
wet: 85.1 kg (187.6 lb)
Fluid capacity (approximate): bottom pan removal: 7L (7.4 qt)
Complete overhaul: 10L (10.6 qt)
dry: 12.5L (13.2 qt)
Pressure taps available: line pressure
Transfer design: two-axis design, link chain assembly
Assembly sites: Windsor, Ontario
Applications: Chevrolet Cavalier (MN4)
Chevrolet Malibu Classic (MN5)
Chevrolet Malibu (MN5)
Pontiac Sunfire (MN4)
Pontiac Grand Am (MN4/MN5)
Saturn L-Series (MN5)
Chevrolet Cobalt (MN5)
Pontiac Pursuit (MN5)
Pontiac G6 (MN5)
Saturn Ion (MN5)
Saturn Vue (MN5)

Jimmy

xstevex · Post by **xstevex** » Sat Nov 10, 2007 3:18 am

i have the manual transmission, would that handle the same ft/lb's?

kinkyllama · Post by **kinkyllama** » Sat Nov 10, 2007 3:25 am

xstevex wrote:i have the manual transmission, would that handle the same ft/lb's?

Then 160ft-lb is the limit. Also depends what your doing with the car, and how sticky/wide the tires are.

jidasas · Post by **jidasas** » Sat Nov 10, 2007 3:31 am

I figure with a decent tune and around 8 psi you could easily get 140 at the wheels. Keep in mind you will not be able to run less than the highest grade of gas you can get. I looked at www.boosthead.com and used their little boostcalc on top of their page and it said with turbo at 8 psi you should get 150 at the flywheel.

Although I would say back the boost down to 6 psi and get a decent exhaust system and CAI and make around 150-160 at the flywheel. again according to whatever calculations they use...I had an email from them that told how they did it...I don't remember where it is at though. They said that usually 1 psi makes 10 hp but about 2-3 hp of that is lost due to heat from turbo and drag on exhaust system etc. So, I would figure 6 psi would at least get you 40 hp which would put you where you want to be. Add in an exhaust system and CAI and you could see at least another 10 hp on a turbo setup.

Jimmy

jidasas · Post by **jidasas** » Sat Nov 10, 2007 3:32 am

160...wow I thought the manual was stronger than the auto...Is it the clutch or the actual trans that fails at 160?

Jimmy

xstevex · Post by **xstevex** » Sat Nov 10, 2007 1:03 pm

yeah id like to know that too. so maybe i could beef up the transmission.

Or is the forenza tranny (D20) a direct swap? or easy at least?

But the engine can hold between 175-200HP?

So if i get a better tranny, I could do lke 180-190HP? That would definitly make me happy.

mr_g · Post by **mr_g** » Sun Nov 11, 2007 1:40 pm

daewoomofo wrote:hell you get the stuff and we can do the upgrades here. my mom has a 2 car garage, it shouldnt take more than a week end to do the n/a upgrades, but turbo thats a different story.

oh and about the engine beingable to take alot of turbo http://www.daewootech.com/forum/viewtopic.php?t=9514 that kinda settles it, he has 275 hp that was on stock engine for 2 years. thats a hell of a 1.6!

Thats on wheels... So it's more than 300HP on crank...

xstevex · Post by **xstevex** » Sun Nov 11, 2007 2:05 pm

so i guess ill be well off on the engine for power (im wanting between 150 and 200HP)

But the Transmission is limiting how much ft/lbs of torque i can get.

im still wondering if the forenza manual transmission bolts up to the aveo.
That will solve the ft/lb dilemma

exist3nce · Post by **exist3nce** » Sun Nov 11, 2007 2:24 pm

The 5spd manual in the Aveo is the D16 (supposedly rated for 160 ft.lbs). The Optra/Forenza has the D20 (supposedly rated for 200 ft.lbs) I believe they are direct swap for each other, but I'm not certain.

Don't forget that Power (HP) is directly related to Torque (ft lbs). Its just a simple equation: HP = (Torque * RPM) / 5252. This means that the more torque you can make higher up in the rev range, the more horsepower you will have. This is how high revving Honda motors can get away with making for example 160hp, but only 110 ft lbs. Their powerband is such that torque holds constant up to very high RPMs, allowing for more HP.

xstevex · Post by **xstevex** » Sun Nov 11, 2007 2:29 pm

exist3nce wrote:The 5spd manual in the Aveo is the D16 (supposedly rated for 160 ft.lbs). The Optra/Forenza has the D20 (supposedly rated for 200 ft.lbs)

yeah i knew that, its what i would need...
I just dont know if it bolt up to the aveo.
I swear i read somewhere that the D16 bolts up to the Forenza engine though, so the forenza transmission should bolt up to the aveo... right?
of course thats if that statement it true.

Does anyone know?

exist3nce · Post by **exist3nce** » Sun Nov 11, 2007 2:33 pm

xstevex wrote: I swear i read somewhere that the D16 bolts up to the Forenza engine though, so the forenza transmission should bolt up to the aveo... right?
of course thats if that statement it true.

Does anyone know?

Just edited my post above ^^^