Difference between T3 60 and Super 60, TURBO Psssssshhhhhh Options

[JoKeRkId613]

Eyo, wutup my peoples? Lol. Sry, I'm a little hyper. But yeah, I'm about to buy a T3 turbo. I'm undecided between the 60 trim and Super 60. Super 60 sounds cooler and very expensive... So I want to know what the difference between those two are. THANKS.

[Dr_Tweak]

playr158, I'm going to have to argue with you on that. Here are my calculations, feel free to point out any errors.

1.8 liters x 61.02 = 109.8 cubic inches. (playr158, your calculations seem to be based on an engine with about 77 cubic inches, or about 1.3 liters???)

109.8 x 6500 (max RPM) x .5 (4 stroke engine) x .90 (approx. VE) / 1728 = 185.8 CFM

If he's running about 7.5 psi (he actually wants to run 6), then that's a pressure ratio of 1.5, 15 psi being about 2.0.

185 x 1.5 = 278 cfm at 7.5 psi
185 x 2.0 = 371 cfm at 15 psi

At sea level and 85* (less than ideal conditions), the weight of a cubic foot of air is .073 pounds.

278 cfm x .073 = 20 lbs
371 cfm x .073 = 27 lbs

Now here are the compressor maps. (Hand drawn, bear with me) The top line is 15 psi and the bottom line is 7.5:



As you can see here, with the T3-50, the turbo will give good efficiency in the lower/mid range, but nearly runs right off the map at max RPM, right when the need the coolest air most!!!



The 60 series runs a little better, still giving preference to the mid range.



Lastly the Super 60, which is giving it's highest efficiency right where you want it, in the mid/high range right where the most POWER is being made, and where cooler air is MOST important! And playr158, since you mentioned Maximum Boost, remember what Corky Bell says, "I'll go for the high side EVERY TIME!".

The best choice then, for a 1.8 that revs to 6500 rpm, is the T3 Super 60.

Other notes, playr158 is right on with the intercooler piping, 2 inch is plenty for that setup. Too big is bad. Also, don't ever use Iridium plugs in turbo or N20 applications, the tip is too small and can't conduct the added heat away easily enough, causing a preignition point. Use single electrode platinum or copper plugs. Yes, I just said copper, they are a great choice for turbo and N20 and are cheap to replace.

Class Dismissed!

This post has been edited by Dr_Tweak: Dec 5, 2005 - 12:06 AM