Hey everyone,

Since my AP2 is asleep in the garage for the winter, it seems like as good of a time as any to start trying to suck some more power out of SoS kit. I have a short list of parts that I've decided on, and just want to be sure I'm not missing anything. I'd like to crack into the 400's while maintaining 100% stock look and sound and being able to pass VA emissions without modification.

Here is my current setup:

1) ScienceofSpeed high boost kit w/ the NOVI 1200, the Hondata FlashPro, and RC 650 cc injectors
2) 4.2" pulley (9psi)
3) Upgraded heat exchanger
4) Walbro 255 pump
5) SoS Clutch kit

With this setup the car was tuned to 330whp/215lb/ft of torque at PTuning. Keep in mind this was stock exhaust and cat.

Here is what I plan on upgrading/adding before a re-tune in the spring:

1) Berk 70mm HFC
2) ScienceofSpeed 4 bar P&P map sensor
3) 3.6" pulley (~13 psi) w/ properly sized belt
4) ID1000 injectors

My questions:

1) Is there anything that I'm missing that should add to my list that will net some extra power (without sacrificing the stock look/sound, or at a large expense)?
2) Is the 70mm HFC the best option, given that I will be using stock header and exhaust? I'm concerned about going from stock sized header outlet to 70mm, then back to stock exhaust size. Would the 63mm cat be a better for me?
3) The 3.4" pulley runs about 14.5" psi; should I consider this pulley instead of the 3.6" for my power goals? Would this be perfectly safe to run on 93 octane pump gas for weekend/occasional weekday driving?
4) Should I consider an upgraded blowoff valve? I'm still using the included bosch unit and still recirculating to the intake; how much of a problem is compressor surge for superchargers at the boost levels I'll be running?

Any advice would be appreciated. Thanks!

 

You should break 400whp with those added parts listed. I wouod switch to a larger blow off valve, but that requires welding on the aftercooler.

Sent from my Samsung Galaxy S4

 

If out get a HFC get the smaller diameter option. I personally would go with a test pipe with CEL fix and bolt on the cat heat shield over it for inspection purposes.

You should reach the 400 level with the 1200 at that 13ish PSI level. Upgrade the pulley if you want, I think you would still be fine on 93 octane with the 3.4" pulley if you want to go for broke.

An upgraded BOV would help alleviate compressor surge because you will have some at that boost level trying to still use a 1" diameter port. But expect more noise if you do so. You could add a second Bosch BPV to the other port on the aftercooler and run dual BPV's. It would still be quiet but help to vent a bit better.

 

Thanks for the replies. I'll be getting the 63mm HFC and probably the 3.4" pulley.

Not sure about the BoV yet though; I can just upgrade that later on, no tune required, correct?

 

If you keep the stock 1in port with an upgraded BOV, you shouldnt have to retune. If you gte a bigger opening, such as a 50mm Tial, you may want to retune the car. We might be splitting hairs at this point, but any change can make a difference on a car.

A tial bov will do the same thing, but it will act differently than a small 1 in sized bov/diverter. Same goes for any larger diameter blow of valve compared to a stock 1in valve

 

can i ask what dyno your numbers came from?

i have the same set up minus the heat exchanger and sos clutch but i have a 63mm berk hfc and i made 360wph and 220 torque dyno dynaimics dynameter on 91 octane.

reason i ask is ive been thinking about eventually getting a smaller pulley and larger injectors. my tuner was telling me not get 13 psi pulley since i only access to 91 here and i dd my car

( I want to get into the 400wph range as well)

 

Desii I think you are in So. Cal add a couple gallons on 100 oct or Autowave sells Torco
or a couple cities sell E85 and you can boost higher and safer



link to So cal 100oct retailers....
http://www.davebarton.com/Unleaded_Racing_Fuel_in_SoCal

 

Hey thanks for the links. Mike at autowave is also my tuner and we spoke about you options which he did mention torco being one of them. I might end up doing this or possibly looking into sos flex fuel kit.

 

Those are some really good numbers.

PTuning has a DynoDynamics dyno I think; the tuner there told me it is one of the lowest reading dynos in the area - lower than dynojet for sure. Also, when the car was tuned it didn't have the upgraded heat exchanger yet, although I don't think that makes a huge performance improvement; more like making the power more consistently and reliably. Unfortunately I won't be able to see the improvement with just the HFC, since I'm upping the boost at the same time.

Did you adjust the redline any to increase the boost a bit?

 

Yeah, like RAIN H8R said, your transient throttle stuff might be affected by a different BOV... Rolling into throttle gently might result in a more rich/lean condition than before. But your WOT stuff should remain unaffected.