Before i make the purchase- tell me

[Shiner]

I am looking to buy the Aeromotive 340 Stealth tank and Holley Sniper EFI for my 70 Chevelle.

Are there any issues with any of these items? I am also running an MSD eCurve and 6AL box, will i easily be able to control the timing inside the car with the controller?

If anyone wants a badass Steve Taylor PRC Holley 4150 650 Double Pumper let me know. Its teflon coated as well.

[dirty rick]

I would not consider any fuel injection setup that was not port injected.
The factories quit using Throttle Body injection 20 years ago for a reason, it sux.
Poor fuel distribution, wetted walls, fuel puddling, poor throttle response, fuel mileage suffers.
The fuel distribution issue is a motor killer, if you try to tune close to the edge (which you need to do for gas),
(the moving target of getting 8 cylinders fed the same amount of fuel is impossible) it will eat itself up tuned on the edge.
Lean misfires on some cylinders and other rich cylinders driving the O2 signal richer which makes the fuel delivered leaner.
Given this a TBI system is not going to be able to deliver full potential of your combination especially in the part throttle zone.
At full throttle depending on your combination (manifold, cam, exhaust) you may be leaving as much as 25% on the table or hurting your motor.

A proper EFI will do timing control for you, you don't need/want a knob on the dash to twist.

I would not use an MSD, it offers little if any benefit and introduces another point of failure.

I would want to hear and see a good number of happy users with finished installs of a sniper before I would consider buying one.
(In my eyes that solution is like sticking it in half way) To an experienced fuel injection technician the claims seem far fetched.

My favorite system is factory port injection with a MegaSquirt MS2 or MS3 controller, crank triggered with coil on plug or a wasted spark coil.
I have passed Pre-OBDII emissions testing in Oregon on many cars using MegaSquirt systems on mild built motors with and without superchargers.

A swirl pot may be a better solution for fuel delivery depending on what you plan to do with the car (much cheaper).

[andrewb70]

I am looking to buy the Aeromotive 340 Stealth tank and Holley Sniper EFI for my 70 Chevelle.

Are there any issues with any of these items? I am also running an MSD eCurve and 6AL box, will i easily be able to control the timing inside the car with the controller?

If anyone wants a badass Steve Taylor PRC Holley 4150 650 Double Pumper let me know. Its teflon coated as well.

A 340 pump is overkill. A Walbro 255 is plenty.

Andrew

[rustomatic]

Isn't the Stealth tank just a Tanks Inc. tank with an overpriced pump? Just buy the tank, along with the Tanks Inc. fuel pickup (30 bucks) and gauge sender (35 bucks), and get the Walbro pump (less than a hundred on eBay). You'll save hundreds. If you must do a TBI, the FiTech (without that underhood fuel tank thing) seems to be the best deal (with lots of testing/online reviews), short of just cobbling together GM stuff from the 1990s through the Summit catalog . . .

[downl50]

Good topic, I'm installing something similar in a 70 Chevelle too! My application sounds similar to yours -- 550hp sbc. I went with Rick's repro tank with 5th gen ZL1 pump -- little more expensive but from all the issues I've read about with the pump on a stick design, seemed valuable insurance. Several people here said they would do this route if they were to do it again.

I was initially planning on FiTech but someone here (forget now) had swapped from FITech to Holley Sniper and highly recommended the latter. Not a lot of feedback on Sniper so far but I'm planning on trying it. I realize it's pretty low functionality but that's essentially what I want -- a simple, better alternative to an off the shelf carb. For fuel line, ordering stock pre-bent stainless lines with AN fittings from inline tubing, will do PTFE flexible segments for the ends.

What're you leaning towards?

[downl50]

http://www.chevelles.com/forums/89-efi/928770-holley-sniper-install-review-replaced-fitech.html