I do not know if this is the the one you posted about or not. I bought this after kicking the ideal to use it for about 9 months. Then I pulled the trigger.

 

Not the same one but close

The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.


PART# 550-869
Are you tired of rebuilding the 50+ year old Rochester Quadrajet™ (Q-Jet) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet™. The first bolt on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Rochester Quadrajet™ (Q-Jet) system retains the same great features as the 4150 Sniper EFI version such as; four 100lb/hr Injectors, built in timing control, a 3.5" full color touchscreen and much more! The throttle body will support up to 500 horsepower naturally aspirated. In addition to all of these great tried and true features, the Sniper EFI Rochester Quadrajet™ (Q-Jet) system will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearing installation!

I was going see if they can upgrade the throttle body pass 715cfm and ask about that kick down part being the same on both models(nvm, Universal Throttle and transmission kickdown bracket included).

Good thing you posted after I seen this(Transmission 700R4/200R4). I need yours(870cfm) sized down a bit for me.

 

I am planning on taking pictures Monday. More parts have arrived.☺

 

New dashboard

Master cylinders will be deleted for better system.

The way it looks now.

 

Master cylinders will be deleted for better system.

What did you have in mind?

 

More stock and raised up to higher positioning. That dirt car peddle sucks.

 

New water pump showed up today. Stay tuned.

 

 

 

More parts are on the way. Stay tuned.😁

 

Nice parts!!

BHJ damper will work great!

Please keep up the pics and progress pics, otherwise, there isn’t much going on in the racing and performance section of the forum!!!

 

I've been following your build. Looks like the retirement fund has been taking a hit. Keep us updated. Thanks.

 

Just received this hydraulic roller cam. Thanks Mark. Stay tuned shifting into high gear to getrrrr done. Lifters should be here soon.

 

Thanks guys cam got here about 15 minutes ago.

 

ok, that cam looks nice and all, but can you post the spec card?

 

It is one of Mark's custom grinds. That being said if he wants to post it .

 

ok, Thanks

What heads/flow numbers and compression are you looking at?

Sorry if I missed it, I read back in the thread but didn’t see that info, other than it is a 480ci.

 

243/249@.050 on a 112. Lift is .587/.581 I believe with 1.6 rockers. However I think I used 1.7’s on the original build.

 

Thanks to both of you, just interested to see it all!

 

How quick are you looking to go?

 

The plan is new ebrock heads that gave not been bought yet . Flow? Gee port work will decide that. Unkown variable right now. The next thing to buy engine wise would be Pistons.

 

You are talking et. Again hard to say but my guess if I hit weight of car at 2500/2600 me in it. Then around a low ten/ high nine but that may be too lofty of a goal with pump gas of 91 octane . Lots of variables but I can dream. If I get high nine then this project is done and I go back to using slower cars that I own. I am limited by cash or I would have gone ***** to the wall build.

 

Sounds like a good plan on the E-brocks.

What compression and piston brand are you looking at?

 

This is a build that I am getting to copying that Mark did for Mad Max. The pistons are Mahle that were used so that is what I intend to use. I think that The build was below 10.50 on Max's engine. It was set up for 93 octane and all I can get at the pump is 91. That being said I will be talking to Mark for what he thinks compression should be to support. This will be mostly a drag race engine and maybe see a small amount of street time if I can tag the car. Big if because the car has very little of the original car left. The roof,rear quarter's and tail pan ,gutted deck lid. We will see if it can be done if not so be it.

 

Things getting tough on this end. The county is talking shut down covid 19. The shop working on car is dragging feet on headers. We will see how it goes this week .
I still need lexan glass ,shifter,transmission shield and blanket,engine blanket,distributor,heads,pistons,block bored, bearings.transmission,drive shaft. Now I can use a alternate engine and transmission temporarily till 480 is done. This car is going down track even if I rent the track for test. That is if I don't die.
ps chassis cert will need done before any runs.

 

Line lock located.

 

Temp installed for fit.

Test fit.

Test fit.

 

Well that is all right now for this week. Should have more next week. Stay tuned for more pictures and progress.

 

Looking good, following along.

What fuel pump and system are you going to run?

 

The fuel pump is the one furnished in the master efi kit. The system is a fuel line that is aluminum with a fuel filter that can support the fuel pump. When system is installed i will take pictures. This is not a cheap venture. I am trying to set car up for a 7.50 cert on everything so when I decide to sell car next guy can go faster than me.Stay tuned for more progress.

 

I should have some more pictures this coming week. Stay tuned.

 

Covid19 got in the way of this build but may get back to it this week i hope.😷

 

Wuhan virus

 

LOL yeah😂

 

Here is custom header for driver's side. It isn't finished yet and they are back to working on the car again.

 

Well.......no one can say there lazy.

 

That's for sure!!! Talk about a nice bundle of snakes!!!

 

I hope to have more pictures Monday.

 

Those headers are nothing less than fine art. Her name is “Medusa”.. I’m enjoying your progress and tenacity. Keep forging on, your passion is keeping you young for the next bucket list item!

 

Tube one is not as close to grease zert as it appears in the picture. I will show a different shot of it when I go back down. Thanks for all the kind words guys on this build.