Fuel Injection Conversion

[grey899]

Hey Everyone,

Let me start by saying that this group of individuals that participate on this forum are some of the greatest ands most knowledgable folks I've ever come across.



I hadn't been to involved with my car or this website because of starting a new business, but have found myself re-motivated after lurking around for a the last few months as the business is starting to settle into it's own (plus taking on a partner always helps...LOL).

Anyway, I thinks it's time to make the car "better" and have decided to start the process by going to fuel injection

I realize the suject has been brought up many times in the past on what's best (product wise and how to do it), but as we all now, technology keeps changing and getting better and was hoping that some here could lead me in the right direction as to what to get and from who.

The current engine is a moderatly built-up 350 with vortec heads.

Any help would be greatly appreciated!!

Dave

ps- Below are some pics of the car.

http://www.infamouscamaro.com/Daves1.JPG

http://www.infamouscamaro.com/Daves3.JPG

http://www.infamouscamaro.com/Daves2.JPG

[andrewb70]

We should probably move this to the EFI forum.

For your combination the new Holley Stealth Ram Vortec system would be great. It should be available in about 30-60 days.

Andrew

[Richz68]

Dave,


Here is what I have decided upon since my build is a budget minded effort. I have a complete LT1 intake, throttle body, fuel rails, injectors, etc. from a 1995 Z28 that I would sell for $750.00

You can convert the LT1 yourself or have it done by a guy named John Millican who started this whole idea.

Here are two great links to look at:


www.lt1intake.com


Popular Hot Rodding August 2003 feature

[grey899]

I'm going to claim ignorance here, so bare with me.

With this system, will I only need to replace carb and intake, or are we talking cam ands other things.

I do realize that making the conversion is more elborate than simply swapping carb and intake, but wondering if the rest of my current engine set-up is sufficient.

thanks again,

Dave

[Richz68]

Dave,



To switch to fuel injection you do not need to change cam or necessarily "upgrage" anything. You will need to "tune" the system or tweak it to match the specs of your motor as it stands to optimize performance and drivability just as you would "tune" or adjust a new carb and/or intake combination.


Here are some photos of my intake at this time:


My intake mods

[andrewb70]

Rich,

Dave has Vortec heads, so the LT1 intake is not going to work for him.

Here is a link to the Holley EFI install manual. It can be very beneficial to read it as it covers a lot of general topics that apply to any EFI system.

http://www.holley.com/HiOctn/ProdLin...Cmdr%20950.pdf


Andrew

[Richz68]

It's actually an easier conversion with the Vortec heads since the bolt patern is the same as the LT1 head.

Take another look at the www.lt1intake.com site.

[grey899]

Thanks for all the info. Its very much appreciated.

Dave

[Q ship]

It's actually an easier conversion with the Vortec heads since the bolt patern is the same as the LT1 head.

Take another look at the www.lt1intake.com site.

Ummm, if you look at the FAQ section on your link is says the Vortec heads will not work, along with a pic showing why not.

[nancejd]

Why not raise the ports on the LT1 Intake? You should be able to add material to the manifold and then port match. If it physically bolted to the head you'd be set. This is a lot of fab work though.

[Q ship]

Why not raise the ports on the LT1 Intake? You should be able to add material to the manifold and then port match. If it physically bolted to the head you'd be set. This is a lot of fab work though.

From that link-

The LT4 intake will not fit Vortec heads either. This is due to the Vortec bolt pattern is way too high on the head for the intake.

The LT4 is a raised port LT1, no?

[nancejd]

Not exactly. The LT4 manifold has flanges that are taller, but internally it is the same as an LT1. In order to actually enlarge the ports, you have to add material to the outside of the manifold, and then port to get the match.

[andrewb70]

The ports have nothing to do with it. The Vortec heads used a unique bolt pattern for the intake manifold. The pattern is easy to spot, it uses 8 bolts that are vertical.

Andrew

[nancejd]

If you're doing that much fab work anyway, you could always redrill the manifold for a different pattern. It definately isn't a bolt on by any stretch, but it could be made to work though, but how much would you have into a "cheap" manifold by then anyway. Is there any advantage to using that style of intake in comparison to a four barrel style manifold converted to injection? There are plenty of Vortec manifolds out there.

[Nova-Mann]

My queastion, while you're on the subject, is can you use the GM Vortec manifold 12496822 which is the recommended carb setup to achieve the 425 hp rating on the ZZ383, and add the bungs for the injectors? This was a combo that I was considering, but had not researched yet.