How much hp will be gained w/ greddy fmic on t-25?

[MaineDSM]

Originally posted by igs

From this I can conclude that T25 failure from "overboosting" is a myth just like T25 blowing hot air after x psi is a myth. False myth I might add.

And that would be a wrong conclusion. As I just pointed out above, people do often kill the T25 by "overboosting", and the stuff you quoted supports that possibility.

As for overheating, please do some more reading. Do you know what a compressor map is? It shows where a turbo is most efficient as far as boost levels go. When you go above that boost level (like 16psi on a T25) the turbo just starts heating up the air. This doesn't make a turbo BAD, all turbos blow hot air when you boost them too high. It just means you should get a bigger turbo.

 

[greyforestgst]

Originally posted by kpt4321
greyforest: You cannot make it NEARLY that simple. The gains from a FMIC will vary a LOT depending on the turbo, the rest of the mods, the car, the test conditions, the boost level, the tuning, etc, etc.

To all: A FMIC will not create as much lag as everyone thinks it will. At 2500 rpm, the turbo has to fill over 20 liters with air, PER SECOND. A FMIC is not going to increase that a whole lot.

A FMIC is an effective upgrade on any car that is pushing enough boost to use it properly. It does not matter what turbo it is, the main question is twhat are the other mods. Like JayHass said, do it as a last mod, not a first more.

....Kyle T.

30.6 hp
32.3 torque
stock turbo
http://www.turbomagazine.com/tech/0209tur_dynocell/index.html

 

[DSMJim]

Originally posted by greyforestgst


30.6 hp
32.3 torque
stock turbo
http://www.turbomagazine.com/tech/0209tur_dynocell/index.html

On a Gallant with a 14B not a T-25. It would be around half that number with a T-25 if not less.

 

[Slow99x]

I did my turbo upgrade last and I could feel a huge amount of lag with the T-25 and still had the same type of lag with the fully ported 14b. It was not till I put on the 16g did this intercooler lag get resolved. I started really noticing it when a friend of mine drove my car and told me that something wasn't right. He drove it again and the only change was the 16g and said the car was much more responsive. The only reason that I left the turbo for last was that I didn't want to be forced to upgrade around the turbo so I did all the support mods first. You WILL loose power going this route untill you get a bigger turbo.

 

[greyforestgst]

Originally posted by DSMJim


On a Gallant with a 14B not a T-25. It would be around half that number with a T-25 if not less.

read my first post

 

[igs]

Originally posted by MaineDSM

As for overheating, please do some more reading. Do you know what a compressor map is? It shows where a turbo is most efficient as far as boost levels go. When you go above that boost level (like 16psi on a T25) the turbo just starts heating up the air. This doesn't make a turbo BAD, all turbos blow hot air when you boost them too high. It just means you should get a bigger turbo.

Anytime you compress air it will heat up. Air at 10 psi is hotter than air at 5 psi. Does that mean you should not run 10 psi? And please define overheating. At what efficiency do you consider overheating? What one person considers overheating may not be what another person considers overheating, so that argument is completely moot unless you are more specific.

 

[igs]

Originally posted by MaineDSM

And that would be a wrong conclusion. As I just pointed out above, people do often kill the T25 by "overboosting", and the stuff you quoted supports that possibility.

Do you have any personal first hand experience? People BS all the time, so you shouldn't take what they say as gospel. I've been on the T25 for 70k miles and have been "overboosting" according to your definition this whole time, and I autocross, in 100 degree weather, and my T25 has not died. Maybe it's because I know how to take care of a turbo and know what really causes turbo failures? Maybe?

 

[igs]

Originally posted by MaineDSM

But the fact is, overspinning a turbo DOES kill them.
From the tome you posted:

Please don't quote out of context, and please re-read the entire posting so you will have a better understanding. It is talking about turbo failure due to hot exhaust gasses, not overboosting.

 

[paul s]

Back in 1998 I had the greddy FMIC and t-25 and with 3 inch turbo back and i/c pipe and bov and 190 pump on 18psi did 14.1 at 95mph....worked for me

 

[DSMJim]

quote:
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Originally posted by DSMJim


On a Gallant with a 14B not a T-25. It would be around half that number with a T-25 if not less.
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read my first post

 

[doug]

I met a local DSMer a couple weeks ago that has a big Greddy FMIC on his T-25. I asked him about the lag and pressure drop, and he told me it's only slightly noticeable, and not a problem. I didn't ask him if he's dynoed the car with it, though. But he did say that overall, he was happy with it.

 

[vertGST]

Originally posted by doug
I met a local DSMer a couple weeks ago that has a big Greddy FMIC on his T-25. I asked him about the lag and pressure drop, and he told me it's only slightly noticeable, and not a problem. I didn't ask him if he's dynoed the car with it, though. But he did say that overall, he was happy with it.

doug i believe i know who you are talking about. he told me the car just pulls harder and there was really no difference in lag or anything. i am gonna try and go for a ride in his car next meeting. he is automatic though so the car continues to boost while the tranny is shifting.

Brendon

 

[Chadillac2000]

is the guy on dsmtuners and if he is whats his user name cause i wanna talk with him cause i was wantin to put a greddy fmic on my auto

 

[doug]

98autogstspyder

And since my last post in this thread, he's taken the car to the dyno and hit 195 WHP and 204 torque. I don't know if his mod list is in his profile, but from what I can remember, it's Injen intake, 3" catback, MBC at 15 psi, and the FMIC.