Boost Numbers with 10% Lower on a TVS

[Red-GT500]

So i've been searching for a while and cannot come up with a solid number about how much boost at 10% lower will net on my set up. I currently have the VMP TVS running a 2.4 pulley and LT headers (other mods in sig) I usually see around 15-16 PSI on my Autometer gauge. I was looking to add the lower and use the 2.6 pulley i have on hand to bring the pressure up to the mid 17's. Is there anyone out there with a similar set up that can chime in on how much boost i would actually be seeing? Im running on 91 octane and safety is always a concern with that garbage. I would be going back in for another dyno tune before i started applying boost but not sure if this combo would be pushing it to far and i would need to drop to a 2.8 pulley to keep it safe.

Also, what size belt would i need for the 10% and 2.4/2.6 set ups? I have a 90MM idler.

Any help would be appreciated. :beer:

 

[RSAGT500]

You should talk to Justin or BJ at VMP.

I just got off the dyno (dynojet) today and I laid down 675hp 697tq on 91 octane. However, I put Torco in the tank just to be over safe. They connected a boost sensor and I was seeing right around 21psi.

My mods:

VMP TVS 2.3 with highflow elbow
2.4 Upper
10% Lower
90mm idler
2013 GT500 Injectors
VMP Single BAP
Kooks L/T with highflow cat x-pipe
JLT 123mm intake
CJ 65mm TB
AFCO H/E
3.73 gears
1 piece aluminum driveshaft

 

[VNMOUS1]

So i've been searching for a while and cannot come up with a solid number about how much boost at 10% lower will net on my set up. I currently have the VMP TVS running a 2.4 pulley and LT headers (other mods in sig) I usually see around 15-16 PSI on my Autometer gauge. I was looking to add the lower and use the 2.6 pulley i have on hand to bring the pressure up to the mid 17's. Is there anyone out there with a similar set up that can chime in on how much boost i would actually be seeing? Im running on 91 octane and safety is always a concern with that garbage. I would be going back in for another dyno tune before i started applying boost but not sure if this combo would be pushing it to far and i would need to drop to a 2.8 pulley to keep it safe.

Also, what size belt would i need for the 10% and 2.4/2.6 set ups? I have a 90MM idler.

Any help would be appreciated. :beer:

Uh????:beer:

21-22 at sea level



bj

 

[Red-GT500]

Not me BJ... im showing 15ish

 

[Rob_03Mach]

I have DynaTech LT's, 67mm VMP TB, L&M High flow Elbow....Other mods in signature...

-10% lower, 2.6 upper - 18lb, peaks @ 19lb boost. Belt SIze: Micro V - K100852

 

[Red-GT500]

Thanks. I may need to find a 2.8 pulley just to be safe with this 91 octane.

 

[crazy4life]

TVS with stock pulley (2.71) and the 10% lower with longtubes gives me 17.23 lbs of boost at sea level.

 

[8urV8]

2.3 Ford Racing TVS with L&M elbow.2.5 upper/10% lower, 90mm idler, long tubes pushing 19lbs of boost with the 82.5 green belt. As well as all the other goods I have on the car as well.

 

[VNMOUS1]

Not me BJ... im showing 15ish

Please call me Friday and let's discuss.


bj

 

[ZX6Ray]

Not me BJ... im showing 15ish

You are 2,000 feet above sea level... So what BJ is saying is your current setup is actually a little higher if you were at sea level.

:read: