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View Full Version : why new FP big16g no make power?

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FattyBoomBatty
05-20-2009, 11:09 PM
So, my friend with a very nearly stock conquest just upgraded from the 12a to an FP-made big 16g turbo.

At the same boost level as before (13psi) there was no difference from stock. We were both expecting it to be at least noticably faster, yet it was not. So we turned it up to 15psi, pretty much the same thing, almost imperceptibly faster. We looked under the hood, and one of his couplers wasn't holding the pipe in, we though that might be contributing to the slowness, and we replaced the pipe with the stock cloth-wrapped rubber hose. No change.

I had peered into the exhaust and inlet of this new turbo, and it is slightly different, a little bigger, but there looked to be a larger-than-normal gap between the blades and the housing walls. He didn't take great pictures, but could even a slightly too-large gap cause a turbo to perform so badly?

here are his pictures, plus one of my 61 for comparison:
http://www.mitsustyle.com/photopost/data/529/medium/Resize_of_FP_Conquest_Big_16G.jpg
http://www.mitsustyle.com/photopost/data/529/medium/Resize_of_FP_Conquest_Big_16G_2.jpg
http://www.mitsustyle.com/photopost/data/529/medium/P5170005.jpg

Just looking at the stock turbo, the gap was significantly smaller on both intake and exhaust wheels. Could FP have messed this up?

Also, he has the stock exhaust with a downpipe and different muffler, but even so, I'd think we'd be able to tell a difference just switching out turbos.

His exhaust made an incredibly loud hissing sound when he'd get on it. It's kindof like stock cars flooring it, but just a lot louder.

Any ideas about this?
jrohner
05-21-2009, 12:06 AM
16g's are slow at only 15psi.
FattyBoomBatty
05-21-2009, 12:16 AM
I'm really thinking now that the exhaust wheel is normal and the housing is an H housing, since it's different and the blades aren't as close as they should be to it.

jrohner, that's a precious piece of commentary. Too bad it's retarded. Now try again but use your brain.
CVD
05-21-2009, 05:24 AM
He might have a point. When my talon was stock the very first thing I did was swap the blown 14B for a 16G. I couldn't tell the difference, even at slightly higher boost levels. That said, I would start with a boost leak test.
95tsi
05-21-2009, 05:53 AM
jrohner, that's a precious piece of commentary. Too bad it's retarded. Now try again but use your brain.

This is why I love this board. The nice way people treat each other. Are you expecting to make 75whp more with a little bit bigger turbo at the same boost level?
scheides
05-21-2009, 06:32 AM
Fatty, he's right. 16g vs 13g vs 14b is not going to make much difference at 13psi or whatever. First question, are there any boost leaks? Was there an actual boost leak test done? Next question, what other mods are done? Spaz's car is a prime example of why a 16g won't make any power over a T25. He's running it with literally everything else stock. Remember, making power is all about the combo, not just one particular part (remember at the dyno day when an hta88 made the same power as my 16g-sized turbo?).
FattyBoomBatty
05-21-2009, 09:08 AM
I thought that was because it had some really small exhaust housing? We fixed an obvious boost leak by switching back to the stock I/C tube, and I checked all the clamps I could reach. And "16g's are slow at 15psi" is a retarded answer, I had to say something.
CVD
05-21-2009, 09:18 AM
Do an actual boost leak test. Myself and lots of others here have testers you can probably borrow. But I still say you wont feel much difference at those boost levels without additional mods
jrohner
05-21-2009, 09:23 AM
I'm really thinking now that the exhaust wheel is normal and the housing is an H housing, since it's different and the blades aren't as close as they should be to it.

jrohner, that's a precious piece of commentary. Too bad it's retarded. Now try again but use your brain.

You really think you'll be fast just by swapping in a 16G, and I'm the retarded one? Too bad everyone else here agrees with a retard then :rolleyes:. Yeah you'll have slightly more power, but feeling it depends on how sensitive your butt dyno really is. My car has over 400hp at 22-23 psi on a 16G, and it's still Fn slow at 15. These are little 4 cylinder's, they can't do :crapper: without boost.

:wank: People like you on here really make me appreciate the people on the EvolutionM board, I don't think I've seen anyone on there like that -- people just help each other without the attitude.
jrohner
05-21-2009, 09:34 AM
this is why i love this board. The nice way people treat each other. Are you expecting to make 75whp more with a little bit bigger turbo at the same boost level?

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