During low speed, I see the purpose of the overhang to direct the air past the secondary chamber/PV opening, however during high speed when the PV is open, the air from all the non-intake stroke cylinders has to be drawn over/around that which has to be bad for high-end flow.

Honestly, if I had a SC or turbo, I'd just remove the PV. I doubt it makes much difference on the low-end when you're forcing that much air, however no PV at all would really open things up on top.

You think you could simply pull out the PV for a few airflow % tests?

 

Yes, I could. Right now I have the SC off for maintenance and a pulley swap, though.

 

Oooh...2.87", right? You set your shift light sooner now?

I think with WI or an AWIC, someday you'll be the first to break 400whp on just SC.

 

Plus, if you removed/eliminated the PV, you could dremel/open up the square entrance area to the 2nd chamber and really help top-end.

 

I figure I can maybe get another 10-12 hp with the 2.87 pulley, but getting to 400 seems pretty ambitious.

I guess I have some good gains left in the exhaust, seeing as how my b-pipe diameter is a mere 50mm, and maybe some careful headwork might free up a few ponies.

Maybe raise compression? Or do the VQ3.5 swap.

 

Cams.....head work would really help, but I don't think they are as bad as everyone thinks.

Cams + some type of intake charge cooling would greatly increase power. The amount of heat that SC is generating at your boost levels is good for another 20-30whp easy.

Have you measured your compressor discharge temperature or anywhere along the charge piping?

 

Just with adiabatic heating at 13psi assuming 0psi pressure loss discharge to manifold(not realistic) your intake charge would jump from 80*F to 187*F.

Using a 72% efficient compressor, your intake charge would end up around 228.6*F.

If you could rig a low pressure drop IC/AWIC, you could drop to 117*F intake charge temperature.

Using 350whp baseline and old rule of thumb 10*F = 1% hp gain, you'd have ~390whp withOUT cams.

 

Ice and Stephen, you guys are smart. Are you both going to Maxus? If so it would be an honor to meet you both.

 

Wow...that's a compliment being lumped in with StephenMax, he's the pioneer here, I'm just riding coat tails. Thanks though....

Not me on Maxus....

 

You know your stuff, don't sell yourself short.

 

I need to locate an 00 VI with lower, larger injectors to fit the 00 VI fuel rails, and figure out what vortech powercooler I should use. Im hoping for a stout number once all this is together running off a T-trim blower.

 

Well I just installed the rpm switch, and good lord, does this car feel good.:grin:

 

If only you had listened to me in the first place.

 

Did you get a ready to bolt one or will you have to do the fab work? I don't think I'm up to the customization...hopefully someday this will become a bolt-on like the mevi.

 

do i need a rpm switch to activate my vi if so were can i buy one

 

summitracing.com

 

ok thanks ordered