FD Daily Drivers: How much boost do you run?
#1
Senior Member
Thread Starter
Join Date: Jul 2002
Location: TX
Posts: 653
Likes: 0
Received 0 Likes
on
0 Posts
FD Daily Drivers: How much boost do you run?
How much boost can one run on the stock twins for everyday driving reliability and still have a nice punch?
I currently have Intake, DP, and Catback. Boost gauge shows 10-8-10 pattern. I'm about to get Pettit ECU, SMIC, Hi flo cat. To take advantage to these mods I would like to run 12-10-12 boost if possible. My turbos have 88K miles on them and I got a new motor installed at 77K miles (coolant leak). Would that be too much for my turbos? I will still be driving the FD everyday so reliability is the priority. Please advise.
Thanks
I currently have Intake, DP, and Catback. Boost gauge shows 10-8-10 pattern. I'm about to get Pettit ECU, SMIC, Hi flo cat. To take advantage to these mods I would like to run 12-10-12 boost if possible. My turbos have 88K miles on them and I got a new motor installed at 77K miles (coolant leak). Would that be too much for my turbos? I will still be driving the FD everyday so reliability is the priority. Please advise.
Thanks
Last edited by gohorns; 09-15-02 at 04:50 PM.
#2
i am not a girl
iTrader: (13)
Join Date: Aug 2001
Location: CT
Posts: 1,916
Likes: 0
Received 0 Likes
on
0 Posts
depending on what condition your turbos and motor are in 12 shouldnt be a problem...if thats your original engine i woudl be a little afraid to run higher boost...a lot of motors give after 70k some run for 130k....
#6
Just an idea, but if you were to get the profect B boost controller (after you purchase your ECU) then you could run 10 psi in daily driving situations and then, with the punch of a button, run 12-13 psi for those special occasions when you want a bit more boost.
Trending Topics
#8
Rotary Enthusiast
8 lbs of boost everyday, tooling around town.
12 lbs of boost to add some spice.
14 lbs of boost to remind myself why I keep it at 8 lbs of boost.
I have the switch for the different maps on the EFI PMC in the ashtray, so it is subtle, accesible, and hidden
With 8 lbs of boost, it is enough to spin the tires through 2nd, break them loose in 2nd, and enough to beat most cars on the street.
It is also much better for gas mileage, about 20% improvement versus driving at 12 lbs of boost. (but you shouldnt be driving an FD if you are concerned about gas costs).
I figure the lower boost and stress will be good for the turbos and engine, but since I can change on the fly, why not do it that way.
Cheers
thesaint
12 lbs of boost to add some spice.
14 lbs of boost to remind myself why I keep it at 8 lbs of boost.
I have the switch for the different maps on the EFI PMC in the ashtray, so it is subtle, accesible, and hidden
With 8 lbs of boost, it is enough to spin the tires through 2nd, break them loose in 2nd, and enough to beat most cars on the street.
It is also much better for gas mileage, about 20% improvement versus driving at 12 lbs of boost. (but you shouldnt be driving an FD if you are concerned about gas costs).
I figure the lower boost and stress will be good for the turbos and engine, but since I can change on the fly, why not do it that way.
Cheers
thesaint
#9
Senior Member
Thread Starter
Join Date: Jul 2002
Location: TX
Posts: 653
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the info everyone. I think I will get an electronic boost controller (thanks chaz) to keep my boost at 10 psi for everday driving and 12 psi max for messing around. Does anyone have the pettit boost controller? Any reviews on it? I think they make their own?
#10
Senior Member
Join Date: Dec 2001
Location: The Land Of No Pistons
Posts: 691
Likes: 0
Received 0 Likes
on
0 Posts
My daily driven FD I had 113k miles on the car when it was stolen.
First set up- 1 Bar of boost, Stock Twins, stock motor, GReddy FMIC, XS ECU, HKS EVC IV, DP, MP, HKS Hiper, KnightSports Pulley kit,
Second set up- 1 Bar of boost, XS T04S, stock motor(#2), HKS Type S FMIC, PFC, HKS EVC IV, DP, MP, HKS Hiper, HKS Twin Power, KnightSports Pulley Kit, 1300cc secondaries
I drove the car everyday as it was my only means of transportation...I never turned the boost down it was always at 1 bar.
First set up- 1 Bar of boost, Stock Twins, stock motor, GReddy FMIC, XS ECU, HKS EVC IV, DP, MP, HKS Hiper, KnightSports Pulley kit,
Second set up- 1 Bar of boost, XS T04S, stock motor(#2), HKS Type S FMIC, PFC, HKS EVC IV, DP, MP, HKS Hiper, HKS Twin Power, KnightSports Pulley Kit, 1300cc secondaries
I drove the car everyday as it was my only means of transportation...I never turned the boost down it was always at 1 bar.
#11
Full Member
Join Date: Sep 2002
Location: chicago
Posts: 77
Likes: 0
Received 0 Likes
on
0 Posts
my car is set at stock boost levels, it goes to 12 then to 10 on the secondary, i drive it evry day with 68 k, the motor was replaced at 56 k, i dont know about when the turbos were serviced
#13
Granted I haven't searched on this, but what are the limitations of high boost? My understanding is that the first major limitation is fuel, but once that is taken care of, detonation on pump gas is the next major concern, right? That one's scary cuz I don't see how you know you're doing it until it's too late. The engine itself, will take most any reasonable amount of boost you throw at it, right?
The reason I ask is that I should be picking up my car with a newly rebuilt engine complete with a Apex RX6 single this Friday! I figured I'd run 13 or so on the street just to be safe, and 15 at races, but I wasn't sure where the limit is.......
Also, for what it's worth, my last engine/orig turbos were run at 12-13psi for their life. The turbos had survived without smoking for 120+k miles. The engine died because of a failed rear bearing, which shouldn't have been boost related. I think 12psi or so is pretty much the rule of thumb for a safe amount to run without having to worry about any damage.
The reason I ask is that I should be picking up my car with a newly rebuilt engine complete with a Apex RX6 single this Friday! I figured I'd run 13 or so on the street just to be safe, and 15 at races, but I wasn't sure where the limit is.......
Also, for what it's worth, my last engine/orig turbos were run at 12-13psi for their life. The turbos had survived without smoking for 120+k miles. The engine died because of a failed rear bearing, which shouldn't have been boost related. I think 12psi or so is pretty much the rule of thumb for a safe amount to run without having to worry about any damage.
#16
The Ricer Eliminator
I've run 12 psi for the entire time that i've had the car(3 years). I have a 10psi setting, but i'm really addicted to the higher power. I would probably be better off running 10psi.
Good luck
Jim
Good luck
Jim
#17
Senior Member
Join Date: Jun 2002
Location: Cincinnati
Posts: 415
Likes: 0
Received 0 Likes
on
0 Posts
I drive mine daily. Its a 94 touring. The car has 92k miles, the engine and turbos have about 38k. About 5k ago the previous owner had the turbos taken apart and seals replaced. I think they were leaking oil.
The car has a downpipe and greddy SP exhaust. It runs about 10-8-12 depending on what gear I am in. So far no troubles.
-Charlie
The car has a downpipe and greddy SP exhaust. It runs about 10-8-12 depending on what gear I am in. So far no troubles.
-Charlie
#18
Full Member
Join Date: Mar 2001
Location: sunnyvale, Ca
Posts: 222
Likes: 0
Received 0 Likes
on
0 Posts
My numbers
I have the PFC set for .9 bar but it seldom makes it that high. Typically it will boost about .85-.87. The boost gage will usually hit 12 on the primary and 11 on the secondary. When I went over Tioga pass (9965 ft) it would still make over 10 psi
Mods shown in sig.
Mods shown in sig.
#19
Senior Member
Thread Starter
Join Date: Jul 2002
Location: TX
Posts: 653
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by TailHappy
Granted I haven't searched on this, but what are the limitations of high boost? My understanding is that the first major limitation is fuel, but once that is taken care of, detonation on pump gas is the next major concern, right? That one's scary cuz I don't see how you know you're doing it until it's too late. The engine itself, will take most any reasonable amount of boost you throw at it, right?
Granted I haven't searched on this, but what are the limitations of high boost? My understanding is that the first major limitation is fuel, but once that is taken care of, detonation on pump gas is the next major concern, right? That one's scary cuz I don't see how you know you're doing it until it's too late. The engine itself, will take most any reasonable amount of boost you throw at it, right?
#24
Constant threat
While not a "daily driver" since I usually only take mine out once or twice a week, with only the minor mods listed below I hit fuel cut in cold weather, so I am boosting to 12 psi or a little above fairly regularly.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM