Throttle body for build - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

cc-rider · 11-13-2021, 09:20 AM

Getting around to thinking about the throttle body for my build. The short version of the build list is: forged internal 376, BTR stage 3 PDS cam, Frankenstein heads, Kenne Bell supercharger.

I know that twin screw superchargers like the inlet to breathe as freely as possible. I don’t know where I’ll end up on the dyno. Maybe 700-800 RWHP would be my guess.

I’m wondering how much a bigger throttle body would add? Are there any good quality aftermarket throttle bodies out there?

Shodown · 11-14-2021, 08:16 AM

For that kind of build and power I would suggest a Nick Williams 102mm boosted TB.

1JEWLDSSRS · 11-14-2021, 08:57 AM

Quote:

Originally Posted by Shodown

For that kind of build and power I would suggest a Nick Williams 102mm boosted TB.

^^^ This for sure. My buddy has one on his 2.9 Whipple, I and I bought one for my NA'd build to change out on my ported LOD manifold. They are a great looking and well made piece of equipment.

tartagliazl1 · 11-14-2021, 09:31 AM

Hands down NW 103. I tried the granatelli tb but they are junk plus there customer service is not that great.

ttshovel · 11-14-2021, 05:01 PM

On a pd blower the bigger the inlet/tb, the better. With that said the nw 103mm is where it's at

Js2fst · 11-15-2021, 12:12 AM

I saw a gain at the same power level. And I saw a loss with a centri on more power.

PoleCat2SSRS2010 · 11-15-2021, 08:38 PM

This is based on my current experience.
Supercharged SS in the early years with a TVS 2300 was plagued with TB problems with the only solution long time ago at that time being a very expensive TB.
TBs are an airflow manager. Too small to support the blower demand (blower size and max RPM and engine RPM and blower pulley ratio) and it will show up on the dyno or at the track.
LSAs from GM start with a mild cam and 1.9L pd blower with an 83mm TB. Folks with cams and blower mods manage to survive with the 83mm TB and it can be had as a ported TB by some aftermarket providers netting 90mm. With my journey I went from 83 to a NA LS3 90mm. It worked ok for low RPMs and cruising BUT it slammed shut and put the car into limp mode when being "spirited". We then put a ported blower and Boosted 102 NW and it worked fine. I put about 1100 miles on it. We then installed a Kong and the NW102 slammed shut. Makes sense, bigger blower more demand so we put on a Boost prepped NW103 works great but we had to go to a 5 inch intake to keep down the vacuum at WOT on the dyno. The Boosted prepped polished finish NW102 now sits on a shelf in storage.
Answer of what all to do is directly related to the sum of all the parts.
New Boosted NW102 TB are rumored to not be available and is now producing the better drive by wire motored 103mm TB. LS3 90mm TBs have reputed history of slamming shut and my personal experience confirmed it. I have no information on the ported 83mm but others do. Mine is sitting on the shelf new in the box next to my NW102. Depending on the end game and to save $$$ just go with the Boosted prepped NW103 and don't look back. From there it is all relative to your tuner's experience. Good luck.

cc-rider · 11-15-2021, 09:02 PM

Very interesting. Thanks for all that detail. Must be safeguards in the tune that can’t be overridden that control the TB. I guess I have no idea where to go from here. Thinking maybe just getting my stock LS3 ported and calling it a day. The NW102 may work. But seems like a crapshoot.

Not sure where to go.

ttshovel · 11-16-2021, 08:34 AM

Quote:

Originally Posted by cc-rider

Very interesting. Thanks for all that detail. Must be safeguards in the tune that can’t be overridden that control the TB. I guess I have no idea where to go from here. Thinking maybe just getting my stock LS3 ported and calling it a day. The NW102 may work. But seems like a crapshoot.

Not sure where to go.

Its not safeguards slamming it shut, it's the motor not being able to hold itself open under the volume of air running across it.

eLeSthree · 11-16-2021, 10:54 AM

https://dsxtuning.com/products/nick-...31754383163472

This or stock. I tried the Snake Eater Performance TB, which is said to work with boost, but my tuner didnt want to mess with so many new parts at once, so I used the stock TB. Sold the SEP before I really tried it, but they offer NO Tuning support, so that sucks.

cc-rider · 11-16-2021, 10:55 PM

After researching further, I’m actually thinking of going with the Nick Williams 112mm throttle body. The Kenne Bell charger came with a 4.5” intake tube and the manifold inlet is massive and will take the 112. So I might as well just go as big as I can since all the components are pre-built to be able to utilize it to the greatest extent.

11-13-2021, 09:20 AM	#1
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	Throttle body for build Getting around to thinking about the throttle body for my build. The short version of the build list is: forged internal 376, BTR stage 3 PDS cam, Frankenstein heads, Kenne Bell supercharger. I know that twin screw superchargers like the inlet to breathe as freely as possible. I don’t know where I’ll end up on the dyno. Maybe 700-800 RWHP would be my guess. I’m wondering how much a bigger throttle body would add? Are there any good quality aftermarket throttle bodies out there?

11-14-2021, 08:16 AM	#2
Shodown Drives: 2014 ZL1 Join Date: Jun 2009 Location: Tucson, AZ Posts: 314	For that kind of build and power I would suggest a Nick Williams 102mm boosted TB. __________________ 2014 ZL1 M6: Roto Fab Intake, LS3 TB, Long Tube Headers, NPP, Mild 2 Wild, JMS BAP, SMG aux pump, ID 1050X Injectors, DSX Flex Fuel Sensor, 10.5" DSX Lower Pulley, Killer Chiller, Tuned by Ted at JRE, Pedders XA Extreme coilovers, Mickey Thompson Street S/S on Weld S71s

11-14-2021, 09:31 AM	#4
tartagliazl1 Drives: 2013 zl1 vert Join Date: Dec 2018 Location: Rochester, New york Posts: 949	Hands down NW 103. I tried the granatelli tb but they are junk plus there customer service is not that great. __________________ 22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 850/ dsx aux kit/ 103mm throttle body/ RPM 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ brick mod/BMR toe and trailing arms/ 751hp 757 tq SAE @17.3lb on a loaded dyno.

11-14-2021, 05:01 PM	#5
ttshovel Drives: 12 camaro ss, 72 chevelle, 91camaro Join Date: Dec 2013 Location: findlay,oh Posts: 2,069	On a pd blower the bigger the inlet/tb, the better. With that said the nw 103mm is where it's at __________________ 12 camaro ss 427lsx, th400, f310 heads, crower shaft mounts, gpi specd solid roller, shearerfab 2k hp a/w, twin bullseye 88mm turbos, hughes pro ssx bolt together converter, holley dominator, 8.50 cert, backhalf, Ford 9", 33x17x16 tires, c16 fuel

11-15-2021, 12:12 AM	#6
Js2fst 2010 transformer Drives: 2010 ss camaro Join Date: Nov 2014 Location: Lee's summit mo Posts: 591	I saw a gain at the same power level. And I saw a loss with a centri on more power. __________________ 2010 transformer, vertical doors, 315nt05 rears, pedders supercar coilovers, hotchkis sway bars, links, adjustable, toe bars, bmr poly cradle bushings, 1le control arms, bmr tunnel brace, bmr subframe connectors. Cam 227/239-623-620@114 Mast medium bore heads, sw 1 7/8 headers, cat delete, x pipe, 3" dynomax true duals, fuel rails, fast 102 intake and NW 102 throttle body, catch can, rotofab cai, shifter, raptor custom shift light. Dss drive shaft, 3.91 gears. 492 rwhp

11-15-2021, 08:38 PM	#7
PoleCat2SSRS2010 R6P Marketing Lab Rat Drives: sometimes Join Date: Feb 2009 Location: Texas Posts: 339	This is based on my current experience. Supercharged SS in the early years with a TVS 2300 was plagued with TB problems with the only solution long time ago at that time being a very expensive TB. TBs are an airflow manager. Too small to support the blower demand (blower size and max RPM and engine RPM and blower pulley ratio) and it will show up on the dyno or at the track. LSAs from GM start with a mild cam and 1.9L pd blower with an 83mm TB. Folks with cams and blower mods manage to survive with the 83mm TB and it can be had as a ported TB by some aftermarket providers netting 90mm. With my journey I went from 83 to a NA LS3 90mm. It worked ok for low RPMs and cruising BUT it slammed shut and put the car into limp mode when being "spirited". We then put a ported blower and Boosted 102 NW and it worked fine. I put about 1100 miles on it. We then installed a Kong and the NW102 slammed shut. Makes sense, bigger blower more demand so we put on a Boost prepped NW103 works great but we had to go to a 5 inch intake to keep down the vacuum at WOT on the dyno. The Boosted prepped polished finish NW102 now sits on a shelf in storage. Answer of what all to do is directly related to the sum of all the parts. New Boosted NW102 TB are rumored to not be available and is now producing the better drive by wire motored 103mm TB. LS3 90mm TBs have reputed history of slamming shut and my personal experience confirmed it. I have no information on the ported 83mm but others do. Mine is sitting on the shelf new in the box next to my NW102. Depending on the end game and to save $$$ just go with the Boosted prepped NW103 and don't look back. From there it is all relative to your tuner's experience. Good luck. __________________

11-15-2021, 09:02 PM	#8
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	Very interesting. Thanks for all that detail. Must be safeguards in the tune that can’t be overridden that control the TB. I guess I have no idea where to go from here. Thinking maybe just getting my stock LS3 ported and calling it a day. The NW102 may work. But seems like a crapshoot. Not sure where to go. Last edited by cc-rider; 11-15-2021 at 09:31 PM.

11-16-2021, 10:54 AM	#10
eLeSthree Drives: 2011 Camaro SS 6sp Join Date: Nov 2016 Location: Drivers Seat Posts: 1,904	https://dsxtuning.com/products/nick-...31754383163472 This or stock. I tried the Snake Eater Performance TB, which is said to work with boost, but my tuner didnt want to mess with so many new parts at once, so I used the stock TB. Sold the SEP before I really tried it, but they offer NO Tuning support, so that sucks. __________________ 2011 Camaro SS---SOLD TMS Dart 427 FED M311s, ESS Tuning G4 Blower, DSX Triple FP Assembly, DSX FF, FIC1300, Mcleod RXT 1200HD, Edlebrock Pro Flo XT 1158whp 1017wtq. 2010 CTS-V A6 - "Stock" SOLD 630whp 658wtq 2024 F-150 RCSB 5.0 4x4 waiting for tunes...

11-16-2021, 10:55 PM	#11
cc-rider Drives: 2010 Camaro SS Join Date: Dec 2006 Location: MN Posts: 1,172	After researching further, I’m actually thinking of going with the Nick Williams 112mm throttle body. The Kenne Bell charger came with a 4.5” intake tube and the manifold inlet is massive and will take the 112. So I might as well just go as big as I can since all the components are pre-built to be able to utilize it to the greatest extent.