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Forum nameTurbo/Nitrous Tech
Topic subjectWhat boost level do you run?
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=30456
30456, What boost level do you run?
Posted by pcaso1, Sep-04-02 12:05 AM
I recently upgraded to forged pistons(8.5:1) and Crower rods? I'm running the HRC FPR and fuel pump. I've noticed that I no longer get detonation at 10psi, like I did before the upgrade. How much higher can I go safely with this set-up?
30457, RE: What boost level do you run?
Posted by mcgyvr, Sep-04-02 12:41 AM
not much higher, you should probably stay at 10 for daily driving and could possible bump it up to 12-15 or so for a race but I wouldnt until you have something to adj. timing. You really need to hit a dyno with wideband tuner to see what else you can do. but Hahn recommends 8-10 with stage 2 and forged internals
30458, RE: What boost level do you run?
Posted by fly1, Sep-04-02 01:22 AM
You shouldn't run more than 10 psi, until you upgrade you fuel system -- injectors, pump, fuel controller. Even with forged internals, the engine won't last too long if you're not retarding timing, and have the above setup.
30459, RE: What boost level do you run?
Posted by XtremeRS, Sep-04-02 03:27 AM
Just upgrade your injectors to 30lbs(315cc). With that you should be able to run 13 psi with the HRC regulator and pump. I'm gonna be running 10 psi on stock internals with 315cc injects and it will be all tuned perfectly with the SFMU. I'll see how long the motor lasts with it like this..the first thing to go will be the head gasket i'm sure..just keep it tuned real good.
30460, RE: What boost level do you run?
Posted by Erik, Sep-04-02 05:24 AM
Hey XtremeRS, did you make some sort of shield for your 1G SMIC? The IC pipes on mine are not very cool and I wanted to know if you have the same problems. I think that maybe my underhood temp is too high and that's part of my problem. I just want some more input on how your 1g is holding up. BTW I'm 5psi w/ 1500-1600 on the EGT on top of 3rd gear.
30461, RE: What boost level do you run?
Posted by Creamo3, Sep-04-02 05:32 AM
I wouldn't boost much higher than 10psi until you upgrade your injectors, and have some sort of controller for them ie. s-afc. I am always a little on the conservative side though because I hate replacing stuff before I am ready.
30462, RE: What boost level do you run?
Posted by brynden29, Sep-04-02 06:55 AM
I have everything (see my sig) and I am running 11 psi daily driving. Just to be safe. As soon as my head gets done and we redo my fuel setup and exhaust I will put it at 15 for daily driving, or maybe more.
30463, RE: What boost level do you run?
Posted by pn0ymahal, Sep-04-02 09:09 AM
with a built motor, you need more fuel, and with more fuel you can boost it up past 10psi... also need to retard timing once it occurs from blowin your pretty motor... i got 315cc injec now(will upgrade to 440cc later) and ignition to retard timing, i am doing 9psi mostly all the time with stock internals.. i think im going to boost it up to 12psi max and if i blow, oh well im tired of being slow =(... but yah fuel and timing with a built motor is what you need...




Michael 99gs
HRC Stage 2
http://www.dreamwater.net/purplebeast
30464, RE: What boost level do you run?
Posted by XavierS, Sep-04-02 09:32 AM
Brynden, your website is pretty cool. What part of texas you from? I'm from San Antonio. And I have some question with the MSD hookup. I just can't get it right. If you're close maybe we can hook up one day and you can show me where and how exactly to wire it up.
30465, RE: What boost level do you run?
Posted by XtremeRS, Sep-04-02 11:44 AM
>Hey XtremeRS, did you make some sort of shield for your 1G
>SMIC? The IC pipes on mine are not very cool and I wanted to
>know if you have the same problems. I think that maybe my
>underhood temp is too high and that's part of my problem. I
>just want some more input on how your 1g is holding up. BTW
>I'm 5psi w/ 1500-1600 on the EGT on top of 3rd gear.

Yeah, actually I did make some metal air sheilding on my IC. The way the IC mounted in there, it was kind of inbetween the fog opening and the other bumper opening. So since I am an RS, with no fogs, i took off the black fog housing, and put some mesh in that opening, along with mesh in the other opening. Then i took some roof flashing and constructed some air deflectors so that air coming into those openings is getting directed to the IC. I have this metal on both sides of the openings, and it leads to each side of the IC, then another piece at the top of the IC. So this makes all air go directly into the IC, instead of going over part of it, or around it. Its working great, and my outlet pipe of my IC is always pretty cool, at least always cooler then the intake pipe. Before i did any of this, my outlet and the whole IC was getting heat soaked...I can try and take some pics, its hard getting in there though...let me know..
30466, RE: What boost level do you run?
Posted by Erik, Sep-04-02 12:05 PM
I thought I could get away w/o making something b/c my WW Agressor front is pretty open. I think that I'll make something anyway as soon as I can find time.
30467, RE: What boost level do you run?
Posted by Dave_FL, Sep-05-02 03:58 AM
I am running 15 psi on mine but I keep braking stuff. first it was the clutch now it is the headgasket. But I used the stock used head bolts when I did the rebuild because I didnt know better. My ARP's and new gasket should be here this weeek though. Once you run 15 psi you cant run anything less. I will run atleast 15 psi on my car and nothing less. I also have 440cc injectors and s-afc on 8:6 compression.
30468, RE: What boost level do you run?
Posted by 992gnt, Sep-05-02 07:05 AM
Wait til you hit 20psi. I want to run race gas all the time now, so I can jet around at 28 psi. :7


30469, RE: What boost level do you run?
Posted by Super20G, Sep-05-02 07:14 AM
Yeah, high PSI is nice, but remember kids, high psi = high dollar fixes ;-) I am just boosting 15psi around town right now with no retard setup.. till I can work out the current kinks I have, i.e. stripped exhaust manifold bolt hole threads = boost leak(but the turbo screams like a deamon cause it has to work harder)... and an intermitten starting problem,sometimes she starts, sometimes she doesnt, gotta love the world of high performance.
30470, RE: What boost level do you run?
Posted by Avenger EST, Sep-05-02 07:22 AM
me and chris both had the starting problem. I think chris is right. havign that dfi in there does affect the coltage regulator in some way. I just put in an external voltage regulator. fixed the problem righ tup. a constant 14.6 volts "at all times"........even when the stereo is blasting my brains out.

A.D.P.
"...If you do too much, people become dependant. If you do to little, people loose hope. If you do it right, people won't be sure you've done anything at all."
bring it on............
30471, RE: What boost level do you run?
Posted by MuRiX, Sep-05-02 08:48 PM
Armond grabbed a voltage regulator from a bigger ford and now has none of the electrical problems associated with it. Makes a difference and cheap.
30472, RE: What boost level do you run?
Posted by Super20G, Sep-06-02 04:12 PM
I am gonna have to try that out, cause I have went through 3 Optima red tops the past few years and alts cause of the batteries wearing out or some shit... Guess only the accel crowd is having this prob it seems. I have no clue what I am looking for at Autozone, but hopefully they will, haha.
30473, RE: What boost level do you run?
Posted by MuRiX, Sep-07-02 02:52 AM
Go to a junkyard and dig one up from a ford truck. You just need something bigger than what you have now.