My turbo, stock or upgrade??

B

Breth

New member
Hi!

Im intressed to buy a 20g upgrade turbo for my typhoon from a member... He told me that the turbo is that laggy that it dont spool up to full boost, because the trans will shift before the turbo got full-boost (with sotck heads, cam, etc.).
So, now im wondering myself. I have the same problems with my ty. It dont reach fullboost in 1st and second gear. It only have fullbosst in 3rd and overdrive... Now im asking myself if i have maybe already a upgrade turbo in my truck..... I dont know it.
How can i check if its the stock or a upgrade without remove the whole turbo? I was messureing the turbo-inlet, it got 49mm diameter....

Can sombody help me with my problem?

Best regards
 
jwaller

jwaller

Evil Genius/SyTy Guru
Re: My turbo, stock or upgrade??

if it's a true 20g then it requires a 2800rpm stall converter to make full boost in the low gears and not be laggy on the way up.
 
B

Breth

New member
Re: My turbo, stock or upgrade??

Yeah i heard that with the higher stall converter, im just wondering what typ of turbo is instaled in my truck, because it dont reach fullboost in the first 2 gears.
 
tnsyty

tnsyty

Active member
Re: My turbo, stock or upgrade??

I know for my truck the 20G with the 14cm is very laggy. Mine wouldn't build but 2 lbs on a launch, when it finally came on, it was strong. I have a stall now and it isn't lagged at all.
 
Quickstop [UK]

Quickstop [UK]

Combating adversyty.
Re: My turbo, stock or upgrade??

take the crossover tube off and the orange elbow and take a pic of the turbo.

If you can get the compressor housing off then you can leave the majority of the turbo on but measure the compressor wheel.
 
Darin

Darin

New member
Re: My turbo, stock or upgrade??

"G" compressor wheels from mitsubishi have staggered vanes on them (16G, 20G, 25G, etc). "B" and "C" comp wheels are all the same height.

Go to Turbochargers.com and look under "Turbo Parts". They have pictures of both the 17C and 20G comp wheel. Note the difference in the vanes. You can easily tell them apart just by looking at them. The B and C wheels are good for lower end response, but lack in the higher pressure ratios due to more adiabiatic (beating of the air) heating. The G wheels shine in the higher pressure ratios becuase of having a staggered design, but may lag a little more down low.
 
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