Hi All,
getting ready to covert my 70 LS5 to fuel injection and its back to that same old question on intakes for this car. The spreadbore iron intake is a limiting factor due to hood clearance. I really want a different intake without going to a high rise hood. 2 options I'm seeing is the Torker 2 intake or a repro or original aluminum square intake. I dont want to go to the lower performing and more expensive quadrajet replacement EFI.
engine has stock heads and exhaust.

thanks for your input

 

I've used Torker 2 and its predecessor Torker on my SBC '75 w/efi with out any clearance issues, ,, , both seem to perform well,,,

 

did you notice a drop in low end torque?

 

I did not. The EFI throttle bodies seem to like the single plane, and work well throughout low to high RPM.

 

Just throwing this out there, I have done numerous Sniper installs for various customers. Many complained about the throttle being too sensitive for casual street driving. Several insisted on modifying the throttle linkage ratio to decrease sensitivity. The reason Sniper is so throttle sensitive in my opinion is that the primary and secondaries are not progressive, you are opening all four blades at the same time and at same rate. A neat thing about the quadrajet Sniper is that the primary and secondaries are progressive.

 

The Torker 2O gets no love....but it works extremely well up to about 480 horsepower...a little more if ported.
EFI does not require a signal like a carb does.....so they work VERY well with single plane intake and a lot of cases better than a dual plane......
If it were my car...it would get a Torker 2O....it also shaves about 50 lbs.

Jebby

 

I have one of the Holley Sniper EFI systems on my 1968 427 Corvette. The original throttle linkage is not the greatest for a low weight, High Horsepower combination so I put the progressive linkage on it and it is much easier to start off. I am using an Edlebrock RPM Air Gap (tall) intake on my BB and with the Sniper on top it is getting a bit to tall. I am using a factory L88 Hood and with the base-plate sealing to the hood the metal plate on top of the round intake screen it is just a fraction of an inch below the hood.

The best part of the Holley system was the OEM In-Tank Fuel pump module. I used one of these and it took 20 minutes to have the fuel pressure at the throttle body. They also put the Fuel pressure Regulator inside the fuel tank so you don't need a fuel return line. This makes the installation really easy and you don't need to buy a new fuel tank.

If you are still looking I would strongly suggest you speak with the folks at EFISYSTEMPRO.com as they are a Holley Dealer but offer two years of (awesome) support from a Highly trained individual. With that kind of support I was willing to try and convert my C3. I am tired of playing with carburetors and all the fun keeping them working. I am a big supporter of the Holley Sniper systems, mine is the Sniper Stealth and you can't tell the engine is fuel injected unless you look hard.

 

Thanks everyone for your input. I located a reproduction LS6 low rise aluminum manifold. believe it or not Torker 2 seems to be out of stock everywhere. I did order my EFi from EFI system pro. good pricing and i like the after sale support. i purchased the fuel tank from Tanks Inc. I believe they manufacture for most of the aftermarket. Had a good deal on fuel tank, pumps etc specifically for my car.
this is my 16th Corvette but the first i will be going the updated mod route. its a 2 top 4 speed roadster, LS5 all matching numbers. Everything can go back to stock but im not worried about that. Im 65 years old so this will be my last project but I want it right for me. I am also installing tubelar a arms and offset trailing arms with coil overs, a large aluminum DeWitts radiator with dual fans as well as upgraded ignition from MSD. with the urging of my brother i will probably video document my progress but im not in a hurry as I plan to retire at the end of next year and will need something to work on. Just too busy right now. Oh yes I did buy the Borgeson power steering upgrade and will get rid of the leaky ram etc.

 

I wouldn't use an LS-6 intake....it is rec port and an LS-5 is oval port. Some say it is fine but I don't like it.......it will cause reversion just before the intake port.
See if you can find a clean Torker 2O used on E-bay or something.......they are out there.

Jebby

 

EXACTLY,, I got my Torker 2 for free cause no one wanted it,,, Bead blasted it,, its like new now,,,,

 

If you are upgrading the ignition, I have heard it is much better to go with the Holley Distributor and CD box than trying to wire in with an existing system. Yep, I recognize that is problematic with your tach drive, but just wanted to mention it.

I've got all my parts, and will be converting mine over to EFI this winter.

 

FYI.
https://www.corvetteforum.com/forums...r-install.html

 

Here is the tach conversion
https://www.corvetteforum.com/forums/c3-tech-performance/2291856-tach-conversion-mechanical-to-electric.html

 

Anyone using this with a Dual Plane intake. Was reading the forums on tuning issues with the dual plane and Sniper.

 

I'm just in the process of doing this exact thing to my '68 427. Removing the Tri-power set ups and going to Sniper. I did order the FiTech Tai-power replacement FI set up - it does not fit the Corvette intake even though they claim it does

 

That's frustrating.

 

I was using the Holley Sniper and the RPM air gap dual plane manifold. I had some tuning issues at first, but it wasn't due to the manifold, it was some other issues. Once I resolved the other issues, I had no issues with tuning the sniper with that particular dual plane manifold. So, in my experience it works fine, but I have also read some folks on the internet didn't have a good experience with them. Most of the folks who have various EFI systems and have swapped manifolds say many of the same things: It's not the EFI system that prefers the dual or single plane setup, but what the engine prefers. I personally haven't tried the swap, but my car runs fine on the dual plane and sniper system.

KT

 

i did it and had no problems, even tho my dual had a divider.

 

I'm still waiting on my FiTech EFI system, still on backorder. I asked specifically and they said it works fine with a dual plane intake. If it has issues, I figure I can just run a small open spacer to get some crossover.

 

Hello there bluthundr,

Why wait for an FITech system when the guys at EFISYSTEMPRO.com can offer you a Holley System with an amazing software package. You don't need to replace the fuel tank and it fits under the hood. No under hood tanks of gasoline either.

I was looking for an EFI system for a couple years and when I met up with Chris at EFISYSTEMPRO I "knew" I found the right place to order my system from. They give you 2 years of a Holley Tier 3 technician to support you. He called me and gave me his contact information and told me to call him any time. Nobody else can give you that kind of help and knowing the complexity I wanted to have help available.

They told me the same thing about the single plane versus Dual Plane as I have an Edlebrock RPM Air gap under my Sniper Stealth system. My dual plane manifold does not even whistle or anything which is a occasional problem

My only complaint was that Holley needs to do something about the throttle linkage. I bought a progressive kit (from Holley) to keep my wheels from going up in smoke when I let out the clutch. The stock configuration opens all four barrels up at once which is a bit much.

I like the FiTECH as it is a nice simple system. I almost bought one early on. When I look at the software that Holley has with their products like the Sniper I am amazed at the potential, it will control a Nitrous, wet or dry system as well as the water/methanol injection for me. I have not switched my system over to use the timing control as well, but that is in the works. I can't wait to have it control everything automatically for me.