Rocket Vapor
March 12th, 2020, 07:46 PM
#82
Registered User
Join Date: Aug 2016
Location: Oklahoma
Posts: 152
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.
Last edited by Letsrunum; March 12th, 2020 at 08:18 PM.
March 20th, 2020, 08:38 AM
#91
Registered User
Join Date: May 2018
Posts: 764
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!!!
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!!!
Last edited by Battenrunner; March 20th, 2020 at 08:43 AM.
March 20th, 2020, 01:57 PM
#97
Registered User
Join Date: May 2018
Posts: 764
March 20th, 2020, 03:11 PM
#98
Registered User
Join Date: Nov 2008
Location: Central Fl
Posts: 7,888
March 20th, 2020, 07:51 PM
#101
Registered User
Thread Starter
Join Date: Sep 2013
Posts: 3,607
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.
March 20th, 2020, 08:00 PM
#102
Registered User
Thread Starter
Join Date: Sep 2013
Posts: 3,607
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.
March 20th, 2020, 08:38 PM
#103
Registered User
Join Date: May 2018
Posts: 764
Sounds like a good plan on the E-brocks.
What compression and piston brand are you looking at?
March 21st, 2020, 02:20 AM
#104
Registered User
Thread Starter
Join Date: Sep 2013
Posts: 3,607
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.
March 23rd, 2020, 03:10 AM
#105
Registered User
Thread Starter
Join Date: Sep 2013
Posts: 3,607
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.
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.
Last edited by wr1970; March 23rd, 2020 at 03:22 AM.
March 28th, 2020, 02:55 AM
#110
Registered User
Thread Starter
Join Date: Sep 2013
Posts: 3,607
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.
May 14th, 2020, 07:51 PM
#116
Registered User
Join Date: Aug 2012
Location: Colorado Springs Colorado/Thousand Oaks Ca
Posts: 1,721
