Porting throttle body or intake manifold?
Pro
Joined: Apr 2020
Posts: 637
Likes: 221
From: Irvine CA
Melting Slicks
Joined: Aug 2000
Posts: 2,425
Likes: 1,198
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
On GPI went with the contained LT2 Intake Manifold Package $638 (12697714) which is a new Manifold with the contained ported 95mm Throttle Body Matching.
Suppose GPI would possibly do some sort of core manifold swap out but didn't inquired.
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Pro
Joined: Apr 2020
Posts: 637
Likes: 221
From: Irvine CA
Per my long conversation with GPI the $638 is for a the mainfold ported to 95 but DOESNOT come with the TB so he say if you are going with a TB that is stock or stock ported to 91 or so then you don’t need the other charge for the 95
Heel & Toe
Joined: Nov 2020
Posts: 15
Likes: 1
From: VA
Received my 95mm tb and ported intake this past week they shaved some of the bottom of the intake and installed a port fitting in the back corner as well. pretty sure i didn't order it to have a port/ bung... did yours come with that ? if it's not supposed to have the bung hole wonder if i can plug it. there site now shows they are on back order.
thanks
thanks
Instructor
Joined: Feb 2017
Posts: 232
Likes: 50
From: Oakland CA
I want to believe that bolt on after market parts generate actual performance improvement but are there any actual HP gains or is this just another rabbit hole? Without proof, Im of the school that the manufacturer would pretty much do all they can within reason to get better numbers for sales and well bragging rights. Has the speed limit gone up?
I know gear heads that belive every part gets x% improvement, but in reality you don't get 10% for this and 5% for that and 10% for that - well thats a 25% increase in HP If this were true, then you just got your C8 up to 600HP (+ or -) or is it all about aftermarket sales & dreams? ...
be safe out there...
I know gear heads that belive every part gets x% improvement, but in reality you don't get 10% for this and 5% for that and 10% for that - well thats a 25% increase in HP If this were true, then you just got your C8 up to 600HP (+ or -) or is it all about aftermarket sales & dreams? ...
be safe out there...
Racer
Joined: Feb 2020
Posts: 392
Likes: 583
From: Philly
Received my 95mm tb and ported intake this past week they shaved some of the bottom of the intake and installed a port fitting in the back corner as well. pretty sure i didn't order it to have a port/ bung... did yours come with that ? if it's not supposed to have the bung hole wonder if i can plug it. there site now shows they are on back order.
thanks
thanks
Racer
Joined: Feb 2020
Posts: 392
Likes: 583
From: Philly
I want to believe that bolt on after market parts generate actual performance improvement but are there any actual HP gains or is this just another rabbit hole? Without proof, Im of the school that the manufacturer would pretty much do all they can within reason to get better numbers for sales and well bragging rights. Has the speed limit gone up?
I know gear heads that belive every part gets x% improvement, but in reality you don't get 10% for this and 5% for that and 10% for that - well thats a 25% increase in HP If this were true, then you just got your C8 up to 600HP (+ or -) or is it all about aftermarket sales & dreams? ...
be safe out there...
I know gear heads that belive every part gets x% improvement, but in reality you don't get 10% for this and 5% for that and 10% for that - well thats a 25% increase in HP If this were true, then you just got your C8 up to 600HP (+ or -) or is it all about aftermarket sales & dreams? ...
be safe out there...
No doubt their are some snake oil products out there and you have to do some research before you buy. I have always been taught that nickels add up to dimes and dimes to quarters etc. and the C8 is no exception in regards to the aftermarket, yes GM has done a great job putting out a powerful and efficient product but their is still room for improvement imo. I saw approx 15hp from the ported combo on the dyno as stated earlier in this thread.
I am one of those so called gearheads and went down the bolt on rabbit hole, my efforts have netted 500whp on a dyno and a best e.t. of 10.52 and best mph was 129.85...naturally aspirated. I'm not done, more to come.
Pro
Joined: Apr 2020
Posts: 637
Likes: 221
From: Irvine CA
Pro
Joined: Apr 2020
Posts: 637
Likes: 221
From: Irvine CA
Lets get back on topic!!!!