Throttle body
Drifting
Joined: Oct 2014
Posts: 1,802
Likes: 69
What ??? You can't find a better mod right now for C7 for $150 other than a ported T-Body----Waste of money ?? No way !!! a waste of money is spending $1200 on a cat back exhaust or $1000 for a set of long-tubes---
The stock C7 T-body as other GM TB's has a huge lip on the bottom of the port--about a 1/4" or more---removing that lip makes the air flow cleaner and ultimately lets more air in---As a tuner I could see the added air thru out the RPM band with my data logger that proves it works--and as mentioned I had to de-tune my car to make it drivable as it became too aggressive---- Also---after the install the car immediately idled like at 1500 for 3-4 minutes until the ECM learned out the idle airflow---
The stock C7 T-body as other GM TB's has a huge lip on the bottom of the port--about a 1/4" or more---removing that lip makes the air flow cleaner and ultimately lets more air in---As a tuner I could see the added air thru out the RPM band with my data logger that proves it works--and as mentioned I had to de-tune my car to make it drivable as it became too aggressive---- Also---after the install the car immediately idled like at 1500 for 3-4 minutes until the ECM learned out the idle airflow---
Advanced
Joined: Feb 2014
Posts: 65
Likes: 0
I installed it on my C7 auto car AFTER installing new ignition wires, aFe intake and the Diablo tune. Another words, it was the LAST item I did. No question the car ran smoother. Since new, my car had a slight ruffness for a min or two until it warmed up. That went away instantly. Car also felt more responsive. So would I install it again, yes, happy with it.
Race Director
Joined: Jan 2014
Posts: 10,709
Likes: 7,102
From: Fulshear, TX
The installation is very easy, anyone with a set of basic ratchet & socket set can do it. The trickiest part is disconnecting the wire harness plug...otherwise it's as simple as disconnecting the intake tube then 4 bolts which secure the TB to the intake manifold.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Just recently I have seen some who are porting the C7 intake manifold--Just as in the C5 and C6 yes there is some room for improvement---However not much on a stock cubed or stock cammed engine----same was for the C5 and C6----Maybe 5-8 RWHP -- so one of the last mods I would ever do as there is not much there--cam --hds- SC-- Yes you can increase the airflow--but on a stockish engine the stock C7 manifold is very good-- unless you have $500 just burning a hole in your pocket----
Safety Car
Joined: Jan 2012
Posts: 4,885
Likes: 486
From: Cin City
St. Jude Donor '14
Just recently I have seen some who are porting the C7 intake manifold--Just as in the C5 and C6 yes there is some room for improvement---However not much on a stock cubed or stock cammed engine----same was for the C5 and C6----Maybe 5-8 RWHP -- so one of the last mods I would ever do as there is not much there--cam --hds- SC-- Yes you can increase the airflow--but on a stockish engine the stock C7 manifold is very good-- unless you have $500 just burning a hole in your pocket----
I have something amazing in the works that I'm not ready to unveil just yet, but it will be a game changer!
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
I have ported lt1 manifold and it is actually very restrictive. Many pickup 15-20hp on the 376 motor. I picked up 30HP on my 427 when we swapped it. I'm in the process of an aftermarket manifold right now to see what else is left because I'm still seeing air restricted in the log at WOT.
I have something amazing in the works that I'm not ready to unveil just yet, but it will be a game changer!
I have something amazing in the works that I'm not ready to unveil just yet, but it will be a game changer!
After major modding all my C5's and C6's I have decided not to takes the heads off my new C7 so I would be interested in any bolt on new parts
These engines have a huge potential far beyond any previous Corvette
with stock hds cam---- Thanks Tom
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Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
For what you and I have been talking about, a ported intake manifold is a great secondary to this mod (especially with the direction you're leaning towards).
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
No 90/92mm TBs that I know of. Of course Ben might know of something custom, but once these OEs are shaved down, they flow quite well.
For what you and I have been talking about, a ported intake manifold is a great secondary to this mod (especially with the direction you're leaning towards).
For what you and I have been talking about, a ported intake manifold is a great secondary to this mod (especially with the direction you're leaning towards).
Are there any of these widely available yet? I know MSD is working on a new one.
Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
I called FAST a while back and they weren't (saying anyway) working on one yet.
Right now porting is a good (and cheap) option. I was hoping for a drop-in 90/92mm TB/manifold combo, but that would screw with the blower silicone, etc.
I showed a decent amount of pickup with the TB + manifold after throwing the SC on there. Not sure how it would wake up a stock NA car, but the more air you move, the less restriction you want.
I don't know if Ben is going to start porting these for customers, but that's one option. Lost of weird restriction points in the stock one.
Right now porting is a good (and cheap) option. I was hoping for a drop-in 90/92mm TB/manifold combo, but that would screw with the blower silicone, etc.
I showed a decent amount of pickup with the TB + manifold after throwing the SC on there. Not sure how it would wake up a stock NA car, but the more air you move, the less restriction you want.
I don't know if Ben is going to start porting these for customers, but that's one option. Lost of weird restriction points in the stock one.
I'm Batman..
Joined: Apr 2014
Posts: 6,142
Likes: 921
From: Lehigh Acres FL
Tech Contributor
I called FAST a while back and they weren't (saying anyway) working on one yet.
Right now porting is a good (and cheap) option. I was hoping for a drop-in 90/92mm TB/manifold combo, but that would screw with the blower silicone, etc.
I showed a decent amount of pickup with the TB + manifold after throwing the SC on there. Not sure how it would wake up a stock NA car, but the more air you move, the less restriction you want.
I don't know if Ben is going to start porting these for customers, but that's one option. Lost of weird restriction points in the stock one.
Right now porting is a good (and cheap) option. I was hoping for a drop-in 90/92mm TB/manifold combo, but that would screw with the blower silicone, etc.
I showed a decent amount of pickup with the TB + manifold after throwing the SC on there. Not sure how it would wake up a stock NA car, but the more air you move, the less restriction you want.
I don't know if Ben is going to start porting these for customers, but that's one option. Lost of weird restriction points in the stock one.
Pro
Joined: Oct 2014
Posts: 737
Likes: 15
From: oklahoma/arkansas
No 90/92mm TBs that I know of. Of course Ben might know of something custom, but once these OEs are shaved down, they flow quite well.
For what you and I have been talking about, a ported intake manifold is a great secondary to this mod (especially with the direction you're leaning towards).
For what you and I have been talking about, a ported intake manifold is a great secondary to this mod (especially with the direction you're leaning towards).
I was hoping to get a 90mm. Bc I wouldn't have to change it later on. I could get it and put it on now.
If Ben knows a secret or somthing maybe he can chime in.. also sean. I sent u a pm I think. I think I replied to my thread and sent u a return pm.
Safety Car
Joined: Jan 2012
Posts: 4,885
Likes: 486
From: Cin City
St. Jude Donor '14
I'm in the process of making a carbon injection molded high flow manifold with aluminum runners and a billet 102mm TB 
I'll have some CAD renderings up soon. While the OEM ported TB and manifold are good for increased gains, they are still very restrictive. My LT1 ported TB was a max port, so much the bottom is actually aluminum now and I picked up 30hp over a stock one and there are still restrictions.
I'll have some CAD renderings up soon. While the OEM ported TB and manifold are good for increased gains, they are still very restrictive. My LT1 ported TB was a max port, so much the bottom is actually aluminum now and I picked up 30hp over a stock one and there are still restrictions. 
Team Owner
Joined: Jul 2006
Posts: 97,155
Likes: 1,471
From: Calgary, AB. There's a reason why white was the only color offered on every year Corvette. Proud Canadian German Jamaican!
St. Jude Donor '09, '12-'13-'14-'15-'16-'17
just how much more throttle response can you get if you have a Diablo tune and have the driving mode set on Track?
Tech Contributor
Joined: Jan 2006
Posts: 4,761
Likes: 240
From: Saint Louis MO
St. Jude Donor '14-'15
The tune isn't somehow changing the way the air is entering. A physical modification will stack on top of the software 'trick'.
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
Ben, thanks for posting. I have done a lot of work on manifolds in the past, and I have a few questions if you don't mind answering.
Is the intake CSA smaller than the head CSA? IF so gains can be made there. How far up the runners is assessable?
I'm sure the factory intake as quite a bit of taper in the runners, but most of these intake are pretty rough inside due to casting so smoothing these areas help.
I've seen you added some epoxy in areas to increase volume area that can be ported, I bet this intake suffers from a lack of plenum volume too even at 376ci, much less at 427ci.
Is the intake CSA smaller than the head CSA? IF so gains can be made there. How far up the runners is assessable?
I'm sure the factory intake as quite a bit of taper in the runners, but most of these intake are pretty rough inside due to casting so smoothing these areas help.
I've seen you added some epoxy in areas to increase volume area that can be ported, I bet this intake suffers from a lack of plenum volume too even at 376ci, much less at 427ci.
