LT4 porting - Supercharger - please school me.

Gary H · 12-19-2019, 09:41 AM

Hi all

Just about to start the install on all the parts in my sig, but have a question about porting the supercharger - What exactly is smoothed? And will there still be benefits to porting the Snout only, if you're running a standard sized (albeit already ported ) throttle body?

So the path is: Rotofab - TM ported throttlebody - LT4 (with 2.3" upper and ported NX Lid + Water/meth injection) - TSP 1 7/8" longtubes (no cats).

Would appreciate your advice and opinion

*radz28* · 12-19-2019, 11:21 AM

Porting only the snout will not likely net as much of an increase as the whole (when I say whole, I mean snout and front section). There are multiple tests showing considerable gains, and if you're sending the snout, sending the whole blower will be worth it, IMO. You gain more efficiency which lowers temperatures so you can run more timing. The blower is just fighting itself less.

IMO - if you're going to port the snout, I'd port the whole. You'll probably stand to gain 40-60 RWHP with the set-up you're going with and making the blower more efficient will maximize your pulley selection even more. That pulley is going to be making more heat, so the more efficient that blower is, the less heat, more advance, and more power you'll make.

JMVHO.

EDFHOBBIES · 12-19-2019, 12:26 PM

Na.. the most important thing is to open the area in front of the rotor pack and clean the diverter area.. That's where the bottle neck is! ck out the pics.. smoothing the snout adds minimal and does let you run a larger TB though I guess it all helps.. but look at this difference!

This is why the maggi 2650 has the edge its nothing to do with brick performance its all this area, the velocity and volume is increased and in return it lowers the temps making the blower more efficient making more power with smaller pulley combos hence being able to turn the bower slower speeds to make the same power if not more!

The oem LT4 same principal

full tilt porting should net 45 hp gain on a 2650 100 hp an this make the eforce equal to if not better than the maggi especially when you factor the use of port injection capability for fueling!

Gary H · 12-19-2019, 01:36 PM

Awesome thanks guys. So it is 'go large, or go home'

HDRDTD · 12-19-2019, 05:15 PM

OK here's a real stupid question, but what's that round plastic item that protrudes down into the SC??

LiqTenExp · 12-19-2019, 05:28 PM

Its not plastic, just a reflection, that is the bypass path

HDRDTD · 12-19-2019, 09:01 PM

Quote:

Originally Posted by LiqTenExp

Its not plastic, just a reflection, that is the bypass path

AHA......

Thanks. Told you it was a stupid question.

*radz28* · 12-20-2019, 08:51 AM

There are no stupid questions

12-19-2019, 09:41 AM	#1
Gary H Drives: Camaro ZL1 Join Date: Apr 2019 Location: London, UK Posts: 304	LT4 porting - Supercharger - please school me. Hi all Just about to start the install on all the parts in my sig, but have a question about porting the supercharger - What exactly is smoothed? And will there still be benefits to porting the Snout only, if you're running a standard sized (albeit already ported ) throttle body? So the path is: Rotofab - TM ported throttlebody - LT4 (with 2.3" upper and ported NX Lid + Water/meth injection) - TSP 1 7/8" longtubes (no cats). Would appreciate your advice and opinion Attached Images __________________ Made in the USA. Refined in Great Britain - insta: zl1uk Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving...

12-19-2019, 11:21 AM	#2
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,201 View My Garage	Porting only the snout will not likely net as much of an increase as the whole (when I say whole, I mean snout and front section). There are multiple tests showing considerable gains, and if you're sending the snout, sending the whole blower will be worth it, IMO. You gain more efficiency which lowers temperatures so you can run more timing. The blower is just fighting itself less. IMO - if you're going to port the snout, I'd port the whole. You'll probably stand to gain 40-60 RWHP with the set-up you're going with and making the blower more efficient will maximize your pulley selection even more. That pulley is going to be making more heat, so the more efficient that blower is, the less heat, more advance, and more power you'll make. JMVHO. __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

12-19-2019, 12:26 PM	#3
EDFHOBBIES Dyno Show Queen LOL Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014 Location: Houston Posts: 4,345 View My Garage	Na.. the most important thing is to open the area in front of the rotor pack and clean the diverter area.. That's where the bottle neck is! ck out the pics.. smoothing the snout adds minimal and does let you run a larger TB though I guess it all helps.. but look at this difference! This is why the maggi 2650 has the edge its nothing to do with brick performance its all this area, the velocity and volume is increased and in return it lowers the temps making the blower more efficient making more power with smaller pulley combos hence being able to turn the bower slower speeds to make the same power if not more! The oem LT4 same principal full tilt porting should net 45 hp gain on a 2650 100 hp an this make the eforce equal to if not better than the maggi especially when you factor the use of port injection capability for fueling! Attached Images __________________ Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber Last edited by EDFHOBBIES; 12-19-2019 at 01:12 PM.

12-19-2019, 01:36 PM	#4
Gary H Drives: Camaro ZL1 Join Date: Apr 2019 Location: London, UK Posts: 304	Awesome thanks guys. So it is 'go large, or go home' __________________ Made in the USA. Refined in Great Britain - insta: zl1uk Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving...

12-19-2019, 05:28 PM	#6
LiqTenExp Drives: 2017 ZL1 Join Date: Jan 2017 Location: NJ Posts: 905	Its not plastic, just a reflection, that is the bypass path __________________ 2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)

12-19-2019, 05:15 PM	#5
HDRDTD Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011 Location: Trenton, Michigan Posts: 7,047	OK here's a real stupid question, but what's that round plastic item that protrudes down into the SC??

12-20-2019, 08:51 AM	#8
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,201 View My Garage	There are no stupid questions __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

User Name		Remember Me?
Password