FMIC installed , now boost problem
06-23-03, 08:06 AM
#1
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FMIC installed , now boost problem
my car need to takes longer time to hit 7 psi ,( my boost controller set at 7psi)
is it normal?
is it normal?
06-23-03, 11:02 AM
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Former Moderator. RIP Icemark.
yeah, I too have found there is a slight bit more lag using a FMIC, you learn too get used to it.
Last edited by Icemark; 06-23-03 at 11:38 AM.
06-23-03, 08:31 PM
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Originally posted by 1FastT2
Of coarce there is going to be more lag, theres alot more tubing to fill up with pressure before it gets to your TB.
Of coarce there is going to be more lag, theres alot more tubing to fill up with pressure before it gets to your TB.
Additionally, all that extra tubing (and possibly the IC itself) is going to create more of a pressure drop, which means that the turbo needs to spool faster to make the same boost at the manifold. It takes time for the turbo to spool faster, which could also be part of the problem.
06-27-03, 12:21 PM
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Assume the following -
1) Original setup was a small SMIC
2) New setup is a large FMIC
3) You still measure boost at the UIM
Question -
1) There is now more of a pressure drop, right?
2) So if you want the same boost at your UIM, the turbo has to work harder, right? (I.E. shorter turbo life)
1) Original setup was a small SMIC
2) New setup is a large FMIC
3) You still measure boost at the UIM
Question -
1) There is now more of a pressure drop, right?
2) So if you want the same boost at your UIM, the turbo has to work harder, right? (I.E. shorter turbo life)
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06-28-03, 07:53 AM
#8
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right.....
I don't know your tubing route, but you gotta keep it simple and straight...Any bends will start the LAG process and make things worse as you go.
1fastII has the right idea for routing, and mine is the same as his, but you gotta get rid of alot of stuff to do it this way too... The best thing you could do is find a different TB elbow cuz the stock ones aren't real great...
I had a FMIC on a stock turbo at onetime and I didn't like it at all... Thats the point I decided to do things right and buy a real turbo and a real FMIC, etc..... I've been at that point so I feel your pain.... Brad
I don't know your tubing route, but you gotta keep it simple and straight...Any bends will start the LAG process and make things worse as you go.
1fastII has the right idea for routing, and mine is the same as his, but you gotta get rid of alot of stuff to do it this way too... The best thing you could do is find a different TB elbow cuz the stock ones aren't real great...
I had a FMIC on a stock turbo at onetime and I didn't like it at all... Thats the point I decided to do things right and buy a real turbo and a real FMIC, etc..... I've been at that point so I feel your pain.... Brad
06-28-03, 02:29 PM
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Damn so its prob a bad idea to get a FMIC for stock turbo's? What about the higher boost pressures some ppl are running like 12-14psi. I would think that with the larger volume of cooling the FMIC gives you it would outweigh any disadvantages a FMIC could have. No?
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