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Milovius
10-20-2002, 12:42 AM
I want to get up to about 170-190hp without worrying about my rods or crank. All advice is welcome and appreciated.

Milos Djuric
1984 318i

Pat Allen
10-20-2002, 10:21 PM
t3 is better suited for higher horsepower needs, the t25 smaller, so less power at the end, it will be close to its limit at 190hp...but could yield better response in a daily driver or in town commuter.

jim
10-23-2002, 03:20 PM
the t25 will ptrobibly overspool at high rpms. but it would spool very quickly. i think you could safely run about 9-11 lbs on the t25 on stock internals to make the target hp. however if you ever put in forged componets and uped the boost, you would find the limitations of the t25 very quickly. 2nd generation eclipse\'s use the same turbo and they fuel cut at 7000 rpm because the turbo is to small for the 2.0l motor. the 1.8 wouldnt make that much of a difference. but a t25 would make a great autocross turbo. quick spooling, instant power, smaller, lighter, and cheeper than a t3.

the t3 is a larger turbo, the spool time would be slower, but i beleve the turbo can be had in a ceramic ball barring to reduce lag. becasue a t3 is larger i think you could safely rin 4-5 lbs of boost to make your target hp. this turbo would spool slower but it would make a vishously stong 3rd and 4th gear car. plus, if you ever forged the internals, you could up the boost to 14 or 15 lbs and the turbo would be in its efficency range. maybe 250 hp.

just my $0.02

<br><img src="http://www.caustic.org/~derek/jim-sig.bmp">
Jim
89' 325i 160k mi
14.365 @ 95.04 mph


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