Hey guys. First of all I'd like to thank all the regular posters on this forum. I have learned so much from almost everyone here in order to build my dream car. As it stands, I don't see myself moving on to another convertible or roadster anytime soon and that is a testament to how well this car was designed and performs, as well as the amazing minds that post here to make it even better.

With that being said, I am ready for a new challenge after almost 40,000 trouble free boosted miles putting down 378.5 rwhp / 236 ft-lb @ 8.3 psi DynoDynamics. Wanted to get some ideas together and post my build here as I move along. I read a lot of the threads and came up with some ideas on how to proceed. As of now, my setup is:



2008 DBW SOS II N1200
4.0 in pulley
Berk HFC
HKS Hi-Power Dual Exhaust
SOS Race Heat Exchanger / Intercooler
4-bar Map Sensor
Hondata FlashPro
AP1 Flywheel
ACT HD Pressure Plate
AP1 Slave Cylinder CDV Delete
ID1000 Injectors
NGK BKR8EIX Iridium IX Spark Plugs

I am wanting to get the car up to the 420 to 440 rwhp range. I am not too mechanically inclined and usually too busy for repeated trips to a shop to fix things. I want to run 93 octane, maintain reliability, and get everything done at one shot. I'm thinking of the following:

1.) SoS 3.0 or 3.2 in pulley (but worried about belt slip). Since my 4.0 nets me 8psi, I'm thinking this will put me close to 14psi
2.) Walbro 255 or AEM 320 or DW300 fuel pump (which one is better / more reliable?)
3.) Upgraded Bosch water pump
4.) In tank fuel pressure regulator or convert to return fuel system?
5.) Any suggestions on gauges and what to monitor and where to mount them discreetly? Was considering AEM failsafe.
6.) Turbosmart Kompact 25mm BOV vented to atmosphere (would this be plug and play or require manipulation or welding to work?
7.) Puddymod Stage II Diff
8.) Custom cold air intake (relocation to bumper / fender)
9.) Any other suggestions or input?

Thanks guys... Will keep thread updated as I move along.

 

For gauges, since you're running flashpro you could hook up the bluetooth on your phone to monitor several items. Admittedly, I haven't done this yet, but I know you can get the boost and IAT.

Also, several guys have dropped in oil coolers, not sure if that's something to consider while performing the other work.

 

The 25mm Turbo smart BOV is PNP. No mods needed.

The Full Blown 340 has proven to be a long term reliable fuel pump for me over the years and will be of the proper size to support your goal. The others you mentioned im not as secure with.

 

Does the SOS kit run 8-rib pulleys?

I would think a Walbro 450 fuel pump and much smaller pulley will benefit you a lot.

Why not run e85?

 

That's a good idea b-more. I actually always run Torque Android app which tells me AFR, boost, IAT, ECT, and a few other things I can't make sense of like ignition and timing. However, I always wondered if these readings are accurate enough for someone who doesn't really track the car.

The FB340 sounds like a good option but is it a drop in like the Walbro 255 or AEM 320? Is it quiet and does it have a good warranty? The Walbro 450 seems to be overkill for my application or will it be worth it?

I've considered e85 but I'm worried about not having e85 stations especially when I go out to the dragon with my buddies or when on long trips to unfamiliar areas. But maybe some input from others will convince me to do it anyway?

 

It is 100% drop in the stock hanger assy. I did mine myself. It is also quiet unlike the Walboro units. Don't know about the warranty, never needed it. Mines 6 years old now. One of the problems with the bigger pumps like a 450 is they can/do cavitate the fuel, heating it up. This will cause systems like vac lock if not further modifying the fuel system. The FB340 is a popular choice because they are easy and reliable and large enough to push enough fuel for any pump fuel SC/500whp or so. AEM320 would be adequate supply also for your goal, however I have never run that pump specifically. The walboro 255 is pretty low on the pic list with the alternatives available. I have run one of these and they are noisy, and I question the supply ability in the upper tier of the set up.

 

You may need a return system for that much power. I was close with a 3.8 pulley, although didn't upgrade the fuel pump and you'll be at a higher boost level than I was.

I may also have a brand new FB340 pump lying around I never installed if you were interested.

 

Thanks for the input so far. Been reading up on the FB340 and so far I like what I see...Please pm me a price for that FB340.

Now I'm trying to decide if the SoS fpr is sufficient or I need to convert to return fuel system... The new KW kit seems to make similar power with just a fuel pump upgrade and no fpr or conversion...

 

I'm on pump gas on the AEM 320 E85 pump. 440whp+ @16-17psi boost & 50-55psi base fuel pressure and at 82% duty cycle. AEM fuel rail and regulator. ID1000 injectors...and full SOS return system. I'd get the walbro 450 and be done with it. I'll be switching to that pump soon. If you EVER plan to up the boost or run E85 you'll need more. Do it once and be done! ...I wish I would have.

 

...and for reference S2000442 has all the same as me but ID1300's and the 450. He's at 80% dty at 55psi base pressure on E85...