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07-18-2023, 06:55 PM
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#1 |
 Drives: 2022 summit white Chevy Camaro 2SS Join Date: Mar 2023
Location: Port St. Lucie, florida
Posts: 65
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LT5 (95mm) throttle body port or no
Is it worth porting an LT5 throttle body or could I get away with an unported 95mm? I’m planning on just doing a simple bolt on build for now, that being lt2 manifold 95mm tb and possibly a rotofab, also would I need a spacer for it or would it bolt right up?
Last edited by Dmoney2SS; 07-18-2023 at 09:38 PM. |
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07-18-2023, 07:26 PM
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#2 |
         Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,678
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I run unported lt5. I tried a few different ported lt5s.
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
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07-18-2023, 09:37 PM
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#3 | |
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Drives: 2022 summit white Chevy Camaro 2SS Join Date: Mar 2023
Location: Port St. Lucie, florida
Posts: 65
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07-19-2023, 06:37 AM
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#4 |
 
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,760
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Run the unported 95. Ported versions can be a nightmare to tune and aren’t worth the aggravation. If you need more airflow than a 95 then simply buy a 103.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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07-19-2023, 06:31 PM
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#5 | |
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Drives: 2022 summit white Chevy Camaro 2SS Join Date: Mar 2023
Location: Port St. Lucie, florida
Posts: 65
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Quote:
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07-19-2023, 06:52 PM
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#6 |
 Drives: 2019 Summit White ZL1 Join Date: Mar 2020
Location: ZL1 Nirvana
Posts: 103
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189 bucks on Rock Auto....genuine GM part
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07-19-2023, 07:10 PM
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#7 |
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Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,678
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U need a spacer unless you widen the holes on the throttle body and then port the throat of the intake and cut beyond the o-ring
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
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07-19-2023, 08:27 PM
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#8 |
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Drives: 2019 Summit White ZL1 Join Date: Mar 2020
Location: ZL1 Nirvana
Posts: 103
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Ok to try to provide some clarification. I have a stock LT5 throttle body from Rock Auto it is a GM Stock part on a ZL1. I used an adapter plate from
https://www.solerengineering.com/generalmotors. Car runs great....still in the process of tuning and I have not had the car on a dyno yet as I am still adding a few things. Listen to Josh....he knows what he is talking about. |
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07-19-2023, 08:45 PM
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#9 | |
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Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,760
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Quote:
 I think that adapter actually looks pretty good…less restrictive than others I’ve seen.
__________________
2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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07-23-2023, 11:37 PM
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#10 |
Drives: 2018 Camaro 1SS 1LE Join Date: Sep 2019
Location: IL
Posts: 117
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Just curious, is there any benefit at all with a 95MM LT5 TB mated to a LT1/2 IM? Both have to be choked back down to 87mm so I wonder what is the point of the 95MM TB?
I just picked up a LT2 IM manifold myself and am in this similar debate on if I run my stock TB or a LT5, but failing to find any reason to run the LT5 on a stock LT2 IM.
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2018 1SS 1LE - DSX E85 Kit | Full ARH Exhaust | RotoFab CAI | Tuned - 462HP/469TQ
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07-24-2023, 06:15 AM
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#11 |
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Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,678
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If the lt2 is ported, the throat should be larger than 87mm
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) Last edited by 6spdhyperblue; 07-24-2023 at 11:42 AM. |
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07-24-2023, 07:43 AM
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#12 |
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Petro-sexual
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I can attest to ported LT5s can be over-ported pretty easily and the resulting tuning necessary to get it to behave can be not fun...
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 '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 |
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07-24-2023, 09:10 AM
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#13 | |
 
Drives: 2022 Camaro LT1 Join Date: Mar 2022
Location: Detroit
Posts: 22
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mm
Quote:
My logic (shoutout to EssMotorsports on youtube) is that for any throttle position besides WOT, the larger throttle body will allow more air to flow. For example, you will get more airflow with a 95mm TB at 50% throttle than you would get with an 87mm TB at 50% throttle. Probably more of a throttle response benefit in this case At WOT, the 87mm TB still has the plate and shaft blocking part of the opening (effectively reducing airflow below a true 87mm opening), while the IM opening is always the full 87mm diameter circle. In this case the TB is the limiting factor for airflow. Going to a 95mm would make the IM opening the limiting factor Unless I'm misunderstanding how they measure the TB, this makes sense to me. But I don't have any comparison numbers isolating only the TB differences |
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