Just getting the parts and tools to retune my TBI was going to be more than half the cost of a Sniper. That made the decision for me. Then I discovered the nickel-and-dime approach Holley uses on selling the bits.
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What all is needed and where can I buy it. I have a manual btw so do not need stand alone tranny controllerJust getting the parts and tools to retune my TBI was going to be more than half the cost of a Sniper. That made the decision for me. Then I discovered the nickel-and-dime approach Holley uses on selling the bits.
What would be needed to build my stock TBI systemBuy the basic Sniper kit, not the master kit. Holley sells the original Snipers refurbished for just under a grand, but now they're selling the Sniper 2 for just a couple hundred more. If you're competent at wiring, skip the PDM kit.
Holley Sniper EFI 550-511-3XX Holley Sniper 2 EFI - Black
The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI...www.holley.com
Upgrade your stock fuel pump to the Vortec fuel pump - it plugs right in place of the TBI pump and can support 400+ hp.
www.amazon.com/ACDelco-EP381-Original-Equipment-Electric/dp/B000C9SHOU
You'll need the $16 throttle arm extension or if you mash the pedal too hard you can bend the throttle arm. Without it the throttle action is too fast and you'll be smoking the rear tires at every intersection. Note: I just discovered that Summit's selling the same arm for $13.
Summit Racing SUM-200284 Summit Racing™ Carburetor Throttle Lever Extensions and Adapters | Summit Racing
Free Shipping - Summit Racing™ Carburetor Throttle Lever Extensions and Adapters with qualifying orders of $109. Shop Throttle Lever Adapters at Summit Racing.www.summitracing.com
You'll need AN-to-metric adapters so you can adapt your factory fuel lines to the AN fittings on the Sniper. I believe these are the two I used.
Russell Performance 640833 Russell AN to Metric Adapter Fittings | Summit Racing
Free Shipping - Russell AN to Metric Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.www.summitracing.comRussell Performance 640823 Russell AN to Metric Adapter Fittings | Summit Racing
Free Shipping - Russell AN to Metric Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.www.summitracing.com
I used two female AN-to-AN to go from the adapters to the Sniper, but the Sniper 2 moved the fuel inlets to the passenger side, so you'll need two short female AN-to-AN hoses. That'll be a DIY exercise, and if you've never assembled braided hose and AN fittings, it's a learning experience. Tightly tape the braided hose and cut it with a hacksaw.
You'll also need the throttle stud for the throttle arm. I believe this is the one I bought. No guarantee.
Summit Racing SUM-G1427 Summit Racing™ Carburetor Throttle Lever Studs | Summit Racing
Free Shipping - Summit Racing™ Carburetor Throttle Lever Studs with qualifying orders of $109. Shop Throttle Lever Studs at Summit Racing.www.summitracing.com
Then you'll also need a throttle bracket. Summit's generic Holley bracket is a bit fiddly, but works good.
Summit Racing SUM-G1514 Summit Racing™ Adjustable Throttle Cable Brackets | Summit Racing
Free Shipping - Summit Racing™ Adjustable Throttle Cable Brackets with qualifying orders of $109. Shop Throttle Cable Brackets at Summit Racing.www.summitracing.com
You can run the factory distributor, but I couldn't get the timing control to work with it, so I upgraded to the Sniper Hyperspark distributor. Then I discovered you need a separate coil and ignition box to make it plug-and-play with the Sniper.
Here's the build thread for WCJr where I jumped to the Sniper.
'89 Stepside "Way Cool Jr."
Doh! Just realized both my Holley FPRs are deadhead. I need a $55 bypass FPR. Screw that. The truck's sitting until I get the Sniper. F* me.www.gmt400.com
I'm sure you've seen this elsewhere but, here it is in a nut shell.What would be needed to build my stock TBI system
Buy the basic Sniper kit, not the master kit. Holley sells the original Snipers refurbished for just under a grand, but now they're selling the Sniper 2 for just a couple hundred more. If you're competent at wiring, skip the PDM kit.
Holley Sniper EFI 550-511-3XX Holley Sniper 2 EFI - Black
The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors. We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI...www.holley.com
Upgrade your stock fuel pump to the Vortec fuel pump - it plugs right in place of the TBI pump and can support 400+ hp.
www.amazon.com/ACDelco-EP381-Original-Equipment-Electric/dp/B000C9SHOU
You'll need the $16 throttle arm extension or if you mash the pedal too hard you can bend the throttle arm. Without it the throttle action is too fast and you'll be smoking the rear tires at every intersection. Note: I just discovered that Summit's selling the same arm for $13.
Summit Racing SUM-200284 Summit Racing™ Carburetor Throttle Lever Extensions and Adapters | Summit Racing
Free Shipping - Summit Racing™ Carburetor Throttle Lever Extensions and Adapters with qualifying orders of $109. Shop Throttle Lever Adapters at Summit Racing.www.summitracing.com
You'll need AN-to-metric adapters so you can adapt your factory fuel lines to the AN fittings on the Sniper. I believe these are the two I used.
Russell Performance 640833 Russell AN to Metric Adapter Fittings | Summit Racing
Free Shipping - Russell AN to Metric Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.www.summitracing.comRussell Performance 640823 Russell AN to Metric Adapter Fittings | Summit Racing
Free Shipping - Russell AN to Metric Adapter Fittings with qualifying orders of $109. Shop Fittings and Adapters at Summit Racing.www.summitracing.com
I used two female AN-to-AN to go from the adapters to the Sniper, but the Sniper 2 moved the fuel inlets to the passenger side, so you'll need two short female AN-to-AN hoses. That'll be a DIY exercise, and if you've never assembled braided hose and AN fittings, it's a learning experience. Tightly tape the braided hose and cut it with a hacksaw.
You'll also need the throttle stud for the throttle arm. I believe this is the one I bought. No guarantee.
Summit Racing SUM-G1427 Summit Racing™ Carburetor Throttle Lever Studs | Summit Racing
Free Shipping - Summit Racing™ Carburetor Throttle Lever Studs with qualifying orders of $109. Shop Throttle Lever Studs at Summit Racing.www.summitracing.com
Then you'll also need a throttle bracket. Summit's generic Holley bracket is a bit fiddly, but works good.
Summit Racing SUM-G1514 Summit Racing™ Adjustable Throttle Cable Brackets | Summit Racing
Free Shipping - Summit Racing™ Adjustable Throttle Cable Brackets with qualifying orders of $109. Shop Throttle Cable Brackets at Summit Racing.www.summitracing.com
You can run the factory distributor, but I couldn't get the timing control to work with it, so I upgraded to the Sniper Hyperspark distributor. Then I discovered you need a separate coil and ignition box to make it plug-and-play with the Sniper.
Here's the build thread for WCJr where I jumped to the Sniper.
'89 Stepside "Way Cool Jr."
Doh! Just realized both my Holley FPRs are deadhead. I need a $55 bypass FPR. Screw that. The truck's sitting until I get the Sniper. F* me.www.gmt400.com
Thanks. Do you think this setup would work good with a 377 stroker (383 crank and rods with stock bore pistons.) and AFR heads?I'm sure you've seen this elsewhere but, here it is in a nut shell.
If you're using the 454 TB, depending on what year it's off, you can try its original injectors at 13 PSI. Or use the stock 61 LB/Hr ones from your 350 and an 18 LB spring. Otherwise get your TB bored out to 46mm and get the 18 LB spring.
SPR Performance
SPRPerformance also known as TBIParts located in Jacksonville, Illinois and servicing customer all around the United States.www.sprperformance.com
Either way, you'll want to have your intake bored to 50mm, for the 454 TB, or at least 48mm for the 46mm one (I paid $50).
The Edelbrock 3704 intake gives you better flow and more torque than the OE one. It's made to fit the TBI heads slanted center bolts. It gives you better flow and more torque than the OE one. It's made to fit the TBI heads 2 inside (on each side) slanted center bolts too. Pre-COVID, I paid $351.95 for it
Edelbrock 3704 Edelbrock Performer T.B.I. Intake Manifolds | Summit Racing
Free Shipping - Edelbrock Performer T.B.I. Intake Manifolds with qualifying orders of $109. Shop Intake Manifolds, Fuel Injected at Summit Racing.www.summitracing.com
Or get a 4 barrel intake and use an adapter ( see www.SPRPerformance.com for that too).
The EBL Flash-II is self learning and has expanded tables, including the capability of boost and the bottle if you want.
With TunerPro RT which is free (unless you wanna make a contribution, suggested) you can modify your .bin AND data log as long for as you want, there's no space or time limit on your log.
And a 12 pin USB to ALDL cable. With your laptop, you're good to go tuning.
OBD Diagnostics
aldlcable.com
Yep, that's what I'm running now on my 377 Blue Print short block with 08-432-8 Comp Cams and their 986-16 springs on Summit Racing aluminum heads. I'm currently running it up to 5700 RPM. Better HP and TQ throughout the power range over a 350 all day long.Do you think this setup would work good with a 377 stroker (383 crank and rods with stock bore pistons.) and AFR heads?
This is probably a dumb question, but this is my first time messing with anything carbureted. Anything iv ever touched has had modern fuel injection and therefore all the parts are made for it.Yep, that's what I'm running now on my 377 Blue Print short block with 08-432-8 Comp Cams and their 986-16 springs on Summit Racing aluminum heads. I'm currently running it up to 5700 RPM. Better HP and TQ throughout the power range over a 350 all day long.
GM SB Compatible 383 c.i. Engine - 436 HP - Short Block Plus
Description: HP & Torque: 436 HP / 443 FT LBS Compression Ratio: 10.0:1 Hypereutectic Pistons Cast Steel Crank Block: 4 Bolt main 4.00" bore Passenger side dipstick Align honed main bearing bore Cylinders honed on computer controlled machine to within .0002 straightness and roundness Cylinders...blueprintengines.com