powerband questions

[bastarddsm]

i have a turbo on my car for a while now i have been notic9ng in the lower gears it just stops pulling at like 5500 and it feels like it has a balance problem. my car was an automatic so it has automatic cams in it, and it has the 5 speed ecu though. I read somwhere that with a 14b they tend to quit pulling by 5500 so is this normal or is there somthing wrong thanks

 

[98TsiAWD]

5 speed turbo ECU? If so are you running 450 injectors? Because the auto's came with 340's or soemthing like that.

 

[Larry L]

With the automatic transmission there was not a 14b in it it came with a smaller TDO4 turbo...In many cases the 14b is swapped in but it did not come stock...And therefore the automatics often performed like the 2Gs' This is because the 2G and the 1G autos, came with small turbos and they cannot keep up with the large 2.0 engine and therefore fall off around 5500 rpms, and sooner if the boost is turned up...Look on your turbo and see if the numbers read TD05H or TD04...THis might explain your problem.

If you look on machv.com you'll see that the 16g upgrade fits into the 90-94 5 speed housing but not in the automatic...This is because the automatics did not come with the TD05H.

 

[bastarddsm]

ok i guess i shoulda been a little bit more clear my car was a n/t automatic now it a a 5spped manual the tubo setup is all factory except the uicp. it has a 14b it has 450's don't question me i am 18yrs old and bulit the car myself no help from anyone i put the motor together i swaped the tranny's i converted to turbo. i just wondered if factory turbo cars quit pullin after 5500 or if my cams are different than a 5speed turbo. and yes it is a 4g63 it has turbo pistons in it i run 14lbs of boost and have a stock exhaust so other than the cams being the factory automatic tranny ones it is a stock turbo car.

 

[pneumo]

Good job on the conversion, that's a buttload of work.

The auto cams are holding you back. They have less lift on both the exhaust and intake. You should be able to find some MT turbo cams pretty cheap, or just get some nice aftermarket cams for some really nice power. Also your exhaust will hold back power, especially in the higher rpm band. Have fun with the extra power!

 

[Larry L]

I agree the automatic cam in the 420 is youe problem...