LT Intake gurus....casting # list
Thread Starter
Launching!
Joined: Jul 2004
Posts: 205
Likes: 3
From: Valencia Ca
LT Intake gurus....casting # list Have a few PNs here trying to decipher what they are all for as I am trying to get cores but the right ones
LT1 vettes
10108476 92-93 Vette w/o crossover
10108630 94-96 Vette w/crossover
LT4 vette
12552138 & 12550631
10208145 no crossover fits ????
Add to the list what you have....what were they off of what can they interchange to. Which ones to avoid if any
Thanks
LT1 vettes
10108476 92-93 Vette w/o crossover
10108630 94-96 Vette w/crossover
LT4 vette
12552138 & 12550631
10208145 no crossover fits ????
Add to the list what you have....what were they off of what can they interchange to. Which ones to avoid if any
Thanks
Thread Starter
Launching!
Joined: Jul 2004
Posts: 205
Likes: 3
From: Valencia Ca
Guess then its a matter of what yrs had the crossover and which didnt?
Are the camaros vettes caprice all about the same externally other than that?
Guessing the crossover ones more desirable?
Are the camaros vettes caprice all about the same externally other than that?
Guessing the crossover ones more desirable?
The non-crossover intakes and the 94-95ish intakes have relatively larger rectangular ports, usually larger than the head ports.
The non-crossover intakes have a rail with poor distribution of fuel but the airflow is fine if the head ports are big enough, the lack of a crossover trough right behind the TB in the airflow gives it a slight advantage.
The -138 intake I referenced and the LT4 intake have slightly smaller trapezoidal ports that match as cast stock LT1 heads better.
The LT4 intake has more material above the port to seal to the taller LT4 head port, which also leaves more room for porting if you need it.
Other than the LT4 having enough material to open up to a big head port I don't believe any of this is a big deal.
At one point I supplied a -138 intake to GIZMO because he wanted another for stock eliminator racing, as in no porting and it's smaller ports compared to the earlier intakes match an as cast head better.
Once you are porting though I really think this is all immaterial, the biggest difference is the fuel rail crossover which is a PITA to have to deal with if trying to put the early intake on a later car. Like welding fittings to the rails to run the crossover up and over.
The non-crossover intakes have a rail with poor distribution of fuel but the airflow is fine if the head ports are big enough, the lack of a crossover trough right behind the TB in the airflow gives it a slight advantage.
The -138 intake I referenced and the LT4 intake have slightly smaller trapezoidal ports that match as cast stock LT1 heads better.
The LT4 intake has more material above the port to seal to the taller LT4 head port, which also leaves more room for porting if you need it.
Other than the LT4 having enough material to open up to a big head port I don't believe any of this is a big deal.
At one point I supplied a -138 intake to GIZMO because he wanted another for stock eliminator racing, as in no porting and it's smaller ports compared to the earlier intakes match an as cast head better.
Once you are porting though I really think this is all immaterial, the biggest difference is the fuel rail crossover which is a PITA to have to deal with if trying to put the early intake on a later car. Like welding fittings to the rails to run the crossover up and over.
