sbc intake on a lt1 engine

[sonofgto]

i built a 355 lt1 for my formula well when i put the engine in my car. i am putting a edlebrock super victor intake on it. i know i have to redrill the heads for the intake but what else do i have to do to the heads to put the intake on my engine. can anyone tell me what i need to have my engine shop to the heads

thanks
greg

[joelster]

You don't have to do anything to the heads. You will have to re-drill the intake manifold bolt pattern. The angles on the Lt1 are different. You can also cut off the water filler neck on the front of the manifold and weld up the holes. You will have to also plug the rear distributor hole in the back.

Edelbrock Super Victor is an excellent manifold. It will flow WAY better than the stock manifold especailly at 4000+rpm.

[sonofgto]

thanks man

i am going to put the distributor in the back of the engine. i am going to also be putting a carb on it and getting away from efi because i don't have the money to do all the efi stuff to get it to work right and the know how so i am going to old school with it.

[Fire67]

You don't have to do anything to the heads. You will have to re-drill the intake manifold bolt pattern. The angles on the Lt1 are different. You can also cut off the water filler neck on the front of the manifold and weld up the holes. You will have to also plug the rear distributor hole in the back.

Edelbrock Super Victor is an excellent manifold. It will flow WAY better than the stock manifold especailly at 4000+rpm.

Actually, alot of people prefer to drill the heads. Im not aware of one way being better than the other, but IMHO, it would be easier to re-drill and tap the heads.

[jakesz28]

One advantage to drilling the heads for a sbc bolt pattern is there are a bunch of intake gaskets available in different port sizes and thicknesses. Different thicknesses may help line up the ports or prevent leaks.

[Fire67]

One advantage to drilling the heads for a sbc bolt pattern is there are a bunch of intake gaskets available in different port sizes and thicknesses. Different thicknesses may help line up the ports or prevent leaks.

Very good points there! To elaborate on the different thicknesses helping to line up ports: Thicker would raise the intake in relation to the heads, thinner would lower it.

[95LT1Z28]

If anyone is looking for a sbc intake manifold I have one. It is a brand new edelbrock performer rpm airgap with the endurashine finish brand new in box. Contact if interested, i was going to go this same route but decided with maybe putting a supercharger on it in the future. pm if interested

[Ninety5PoloZ]

How hard would it be to redrill and tap the heads? Do you have to weld up the stock head holes and drill and tap new ones? How about the intake? Weld up the SBC holes and redrill the LTx holes or just change the angle of the holes?

My intake doesn't fit worth a crap due to the heads being shaved too far and I had to modify the holes in it to get everything to line up right, but it doesn't leak or anything like that. I have been thinking about the Vic Jr though since it cleanes it up and helps performance alot. I only have a 355 but it spins to 7K and I know I could see a difference in the Vic Jr setup.

[jakesz28]

No need to weld up the stock holes in the heads you can just transfer the pattern and drill them.


But if the heads have been milled enough to throw off the bolt holes the ports are going to be way out of position too. The intake will have to be machined on 3 sides to correctly line up the ports.

[Ninety5PoloZ]

No need to weld up the stock holes in the heads you can just transfer the pattern and drill them.


But if the heads have been milled enough to throw off the bolt holes the ports are going to be way out of position too. The intake will have to be machined on 3 sides to correctly line up the ports.

Ya I realize that. How hard is it to redrill the heads? I mean getting the angle right. What would be the easier route to go, drilling the intake or the heads? Once I swap inakes it will stay there, and that way if I get new heads I don't have to worry about redrilling those and tapping them.

I plan on having some dart heads ported for me in the future if I ever have any money LOL and it would be nice to just bolt the intake setup on and be done with it

[jakesz28]

If anyone is looking for a shop to fix the bolt holes in the intake or heads Late Model Engines can do this. On one of my last calls down there talking to Brian he also said they have a guy that ports intakes and heads. He also said they could convert a sbc head to run on the LT1 block like what I'm running.




http://i97.photobucket.com/albums/l211/jakesz28/21608011.jpg

[HITN94]

what degree head is on your car jake?

[jakesz28]

Just a 23* head. It is hard to run a better head on the small 4.030 bore. If your doing a n/a deal it is easier but the valve relief get pretty big. Not much material left above the ring with this bore.

[HITN94]

ok cool

[dsmawd350]

so whats involved with putting a single plane on in place of a stock manifold? does the motor need to come out or the heads off to go the the machine shop to be matched with the manifold? if the manifold is drilled instead of the heads can everything stay on and just quikly swap manifolds vs pulling the heads to have them drilled then doing headgaskets and everything

[jakesz28]

It can be done many different ways. A lot of what your asking will depend on how the ports line up. It is possible to just have the sbc intake's bolt pattern changed to the LT1 positions. But if the ports don't line up quite right you will most likely have to pull the heads to do a gasket match on both the intake and heads. This could be a lirttle different for each combo.

[dsmawd350]

Got it! thanks for the reply

[dsmawd350]

is there a specific part number for the best Single Plane for the LT1? is it just the edelbrock super victor efi for a 350 sbc?

http://www.summitracing.com/parts/EDL-29135/?image=large

[Jay_rich]

is there a specific part number for the best Single Plane for the LT1? is it just the edelbrock super victor efi for a 350 sbc?

http://www.summitracing.com/parts/EDL-29135/?image=large

there isnt a lt1 specific just the SBC, look in the forced induction forums under my build I am going to be doing my conversion soon.

Jay