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05-28-2009, 07:45 PM | #1 |
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Vehicle:2006 STI Matte Black |
BSP Build
First off, I am not sure this is the right spot to post this, so please let me know if I should move it or whatever.
So I have been autocrossing in AS for almost 3 years now (since my 2006 STI was brand new). I did: - front sway bar (whiteline adjustable 24mm) - Koni inserts (let me tell you that was a PITA) - 4 point harness - SPT cat back exhaust - 1/4 spacers so I can run Kumho V710 275/40/R17 on my stock 8" BBS rims - K and N air filter - Hawk Brake HP+ pads I am now ready to jump to BSP and this is where I need your feedback. I am thinking of doing the following mods where the goal is to have a car with the potential of being competitive in BSP where the limitation is the driver and not the car. - Engine Management: AccessPORT - Downpipe: 3" SS Street Downpipe w/ Cat - Uppipe: Grimmspeed Up Pipe - Intake: Short Ram SF Intake System - Pulley: COBB Lightweight Pulley - Plugs: NGK IX Iridium Spark Plug - Injectors: Deatschwerks 1000cc Top Feed Injectors - Pump: Walbro Fuel Pump 255LPH - Headers: Gruppe-S Unequal Length Header (i want to keep the boxer sounds so i am going with unequal length) - TGV Delete: JDM TGV Delete Risers- Top Feed - Coilovers: Racecomp Engineering spec RZ RS Pro's with 700lbs springs up front and 600lbs springs in the rear. - Cambers plates: included with the above coilovers - Misc: Exhaust Wrap - Tune: 4 Custom Dyno Tunes - Pump,Race Gas,E85, E95 (I will mainly be running E85 for street and track even though i dont really drive this car on the street much anymore) I also have a clutch and pressure plate sitting at my house so no need for feed back there. I did not include prices since i am looking for parts feedback and not where to buy the parts. Thanks in advance.
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Last edited by sti4rs; 06-03-2009 at 05:38 PM. Reason: Updated part list |
05-28-2009, 07:56 PM | #2 |
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I would think the RCE T2 coilovers would not be able to handle enough spring rate for an STI to be competitive in BSP.
I'd go with 1000 cc injectors if you are even considering running E85 and a upgraded turbo. I am also very interested to see what the difference (HP and torque curves) between C16 and E85 is when properly tuned for each. For the up pipe I'd go with an external wastegate if the rules allow it, and the new Grimmspeed ones are very nice. More important than all that other stuff- what spring rates are you going to run, with what swaybars, on what tires and wheels. |
05-28-2009, 08:27 PM | #3 |
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05-28-2009, 09:34 PM | #4 | |||||
Scooby Newbie
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Vehicle:2006 STI Matte Black |
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Regarding spring rates, I have no idea... looks like I need more research. Tires, I was going to stay with the V710 or maybe switch back to the A6 (I used the A6s before and they are great but wear very fast - I currently go through about three sets of V710s a year - I do about 25 events or so a year and planning on more this year and next and I have a co-driver). I was thinking about getting a 9.5 or 10 wide rim and trying to run up to 315s at the beginning of next year. Thanks for the tips... keep them coming. |
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05-28-2009, 10:38 PM | #5 | |
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15.10.4.b Says: No changes are allowed to waste gate(s) size, number, or location. No changes are allowed to variable-geometryturbine (VGT) hardware. |
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05-28-2009, 11:52 PM | #6 | |
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The STI is overmatched in BSP by the EVO at the national level. It may do well locally but the EVO has many advantages over it and it shows in results from national events. Honestly, save some of your money and go to STU or buy an EVO for BSP. You will stand more of chance in either one of those. Oh and I don't know where the other poster got his information about the RCE T2 not being valved correctly to handle a high spring rate. Get your own info, talk to RCE and get a dyno graph from them. |
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05-29-2009, 12:48 AM | #7 | ||
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Mainly locally, but I am very likely to do the packwood event and possibly the san diego event (and thats where national champ evo is)
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I am not sure I can say thanks enough. BTW, I am planning on doing this the week after the 4th of July and going to Packwood the 11th and 12th with the new setup. |
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05-29-2009, 01:16 AM | #8 | |
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also, i'm not really sure how having a highly tuned car with loads of set up adjustment makes the driver the limitation |
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05-29-2009, 01:49 AM | #9 |
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05-29-2009, 06:50 AM | #10 |
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05-29-2009, 07:52 AM | #11 | |
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Karen |
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05-29-2009, 08:42 AM | #12 |
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05-29-2009, 09:16 AM | #13 | |
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05-29-2009, 10:45 AM | #14 | |
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The cars have different strengths and weaknesses (same with the BMW M3; I have also driven Lee Piccione's M3). I still think that a good chunk of the Evo's "dominance" is driver and lack of equivalent drivers in equivalently prepped STis. I'm done with the thread hi-jack. The OP asked about BSP setup for his STI. I'm currently building an ESP WRX, using a lot of the same setup from Fehrman's STi. I'll be taking it out for the first time on Sunday, but this is what I'm starting with : * 800lb front/650lb rear Hypercoil springs mated to AST 5200 struts (from Vorshlag Motorsports. Joel had the zzyzx coilovers on his car, but Steve is on hiatus right now so I couldn't get a set made for me. * Vorshlag camber plates (with the coilover package) * 27/29mm Whiteline adjustable front bar -- this is a holdover from the DS setup, and I might be disconnecting it to see how that works (and if it does work, I would end up just removing it) * stock rear bar -- I might be changing this based on how this weekend goes * 295/30R18 A6s -- I can't afford to do all three diffs, so I'm trying to compensate with more tire. * STi intercooler * Cobb AP * upgraded pitchstop/engine mount, strut tower bars, intake, downpipe, and probably some other stuff I'm not remembering (not sure what kind IAG decided to put on the car) When you say "turbo upgrade," you do realize that you can't change turbos except through update/backdate, and even then, you can only change the turbo alone if the block is the same part number. Otherwise, you have to swap the engine and turbo as a package. For instance, if I wanted to use the turbo from a 2003 WRX (just an example), I would also have to switch to the 2.0L motor with the turbo. You should consider upgraded differentials. Seriously, that one mod made a huge difference in the ability to put down power in Joel's STi. Karen Last edited by CamaroFS34; 05-29-2009 at 12:50 PM. Reason: speeling misstake |
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05-29-2009, 11:06 AM | #15 |
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To emphasize Karen's point.....good differentials will make more impact on the performance than power or torque will. Tires/wheels are a given. Well damped struts and springs are a given. Diffs are sometimes given the lowest priority, but they really do make a world of difference.
Jay |
05-29-2009, 12:37 PM | #16 |
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thanks for the good posts guys. i am running off to work (can't work on cars all the time) but i wanted to clarify one thing, i am not doing the turbo upgrade for at least a couple years but just wanted to keep in mind what i can do now at no extra cost or disadvantage that would save me from replacing parts later.
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05-29-2009, 01:08 PM | #17 | |
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getting rid of your push (stiffer rear springs/bars) and bigger tires are going to make the lack of diff problem worse (more lateral grip means less load on the inside tires at corner exit). At the very least you HAVE TO HAVE a rear diff. ...but what do I know, i'm just guessing. |
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05-29-2009, 01:13 PM | #18 |
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05-29-2009, 01:15 PM | #19 |
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05-29-2009, 01:16 PM | #20 |
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If you multiply 55.88 by the number of kilograms you will get your lbs per in.
Packwood Wa June 13th and 14th ? I'll be there on the 13th, perhaps I will see you there. Travis |
05-29-2009, 05:07 PM | #21 |
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05-29-2009, 07:00 PM | #22 | |
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Just build for SM and have fun! Last edited by crystalhelix; 05-29-2009 at 07:05 PM. |
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05-29-2009, 08:07 PM | #23 | |
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I have also read a few posts about people running 700 lb/in (or higher) on them, so the valving is pretty flexible. Myles will definitely be able to help you out with technical details and provide different spring rates if that's the route you choose. |
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05-29-2009, 09:05 PM | #24 |
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05-29-2009, 11:40 PM | #25 | |
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