Im new here, with a noob question...

Anyone have their SC with the boost pulley?
whats the pros & cons about the boost pulley?

how much are they running?
anyone have one for sell?

thanks

 

if you are referring to the High Boost Pulley, there is pros and cons.
pro:
More boost

con's:
hotter air (reduces power)
tuning from hondata needed 600 dollars
440cc injectors from rsx-s needed. more than 200 for sure.

it will cost a bunch of money to run it safely, though you can run it without the tuning and injectors, but it will cause some damage.

 

Thanks!

 

But then whats the point to get the boost pulley then?

more boost = more power
hotter air = reduces power

then isnt it the same O.O?

 

if you have an intercooler or methanol injection, it can cool down the intake considerably. with he pulley and methanol injection with good thermal gaskets, you can make more power, and that to, a considerable amount.

 

ive been sitting on my HBP since dec and still waiting to install it. IMO, the only way to make it work effectively is adding an external fuel pump, change out FPR, bigger injectors preferably 370cc (s2k's are direct bolt on), but i also heard rsx 290cc will do the job, getting some type of intercooler, either custom air to air or methanol injection, and most importantly engine management. i think you said you had emanage ultimate right?

without those things, HBP will actually hurt you more than it will help.

 

It's really simple conceptually...
Getting more power requires 2 things - more air and MORE FUEL.

Adding a bigger pulley to the SC will make the SC move MORE air into the engine, becasue it make the the SC paddles move at a higher rpm...

Whoop te do... more air. Now you're running leaner (too much air in combustion).

Without retuning the ECU to tell the fuel injectors to spray in more fuel to combine with this extra air... nothing happens. BTW, the stock injectors are running near 95% duty (max capcity) with the SC. As noted, you'd need bigger FI and a new tune to make it right.

Those folks that ARE running the HBP aren't accomplishing anything other than making thier engine run lean... Dan...k blew his head gasket runnin the hbp. First SC engine failure I've seen here in over a year.

 

I picked mine up for 150 i think or maybe less?!? i have the high boost pulley on my sc, and runs great! if your at high altitude than your be perfectly fine like i am
~Jason

 

I wouldn't run the HBP until the Hondata reflash is available. Like Kennedy said, I really fucked up my motor running the HBP.

BTW, my new motor is a BEAST!!!!!!!!!!!!

 

Details please!

 

what does it feel like to have a blown head gasket? what caused the problem? was it because you were running too lean with the HBP?

 

nicepeta,

More boost does not equal more power. Boost is made when you flow air through a restriction. The more boost you have on the guage, the more air is stacking up and not being used.

You can only pack some much air and fuel into the combustion chambers. Keep in mind what determines power outout of ANY gasoline engine is how efficiently it burns fuel. Air is a limiting factor in power production.

Speaking Comptech supercharger only it is based off an Eaton M62 supercharger and no intercooler. Adiabatic efficiency of the Eaton M62 is around 65% at 4-5 psi. Most Eaton's postive displacement hybrid roots blowers work like this. They offer tons of air flow down low with little boost.

Spin the blower faster and create more boost and you start to leave the efficiency range. At 9-psi and 18,000 rpm the M90 turns towards the 55% range. 55% air and the rest is unwanted HEAT. At 12-psi it is around 50% and working against you.

More heat in the air charge means less oxygen is present. The overall potential to make power is reduced. If air is denser it packs more oxygen which can be mixed with the right amount of fuel.

The second whammy is more heat means more spark resistance or the reduction of the ability for the spark to ignite the air fuel mixture. Since electricity is lazy it flows to the path of less resistance. Many supercharged engines with stock ignitions have blown the spark out under boost (as little as 6-psi). I have seen many cars with distributorless ignitions lose power from spark blow out under boost.

The easy cure is to reduce the gap on the spark plugs.

Moving on, since more boost changes the air charge compression ratio (not the static compression ratio) it always means you will be more knock constrained. This means the actual spark advance must be retarded or spark is pulled (reduced) to avoid knock.

In all my testing the rule of thumb is, 1 degree of spark on a supercharged car is worth 4-5 HP and 8-10 lb.-ft. of torque. Pull back 4 degrees of spark but add 2 psi of boost and what have you gained? You lost 18 HP and 36 lb.-ft. of torque.

Can more boost increase power output? Yes and no.

If it were always yes, then you could add 100 psi and make "X" amount of power right? Again, only so much air/fuel can be compressed into the combustion chamber and cylinders.

The key to adding more boost is to make sure you are still within the range of adiabatic efficiency of the supercharger. Cooling the air charge is the best way to add more boost but wait there is another thought.

I have seen cars with and without intercoolers and the bottom line is the cars with I/C units always make more power than the cars without I/C units. Longevity is also increased with an intercooler as it keeps you less knock constrained.

Adding an intercooler (water-to-air) to the Eaton M62 would drop the discharge temps anywhere from 50-70 degrees F. on a 80 degree ambient day. Boost would drop off slightly, but more power would be available since you can add more spark timing without knocking.

You don't want boost, you want cool dense air flow and lot's of it. The ideal hybrid roots blower spins the snot out of the supercharger but makes little to no boost and lots of air flow.

A-Train

 

It feels like an exhaust leak. No power in low RPM's. It would bog down. The only thing that I can come up with is the HBP. The tech from Comptech told me not to put it on. Maybe because I was running leaner. Maybe I drove it too hard. No telling.

 

Stock J32A. I couldn't make traction the other morning in first through fourth.