Yellow Bullet Forums banner

21 - 34 of 34 Posts

·
Registered
Joined
·
4,906 Posts
Bob, I have the little brother for this going on my new motor this year. I think it's 550-518 that's rated at 650Hp, but heard from a guy on Team Chevelle's that those can support about 680Hp. This will be on my daily-driver style 427 BBc. Should be right in the 670/680Hp range were figuring.

Now this 4500 series is rated at 800-1500Hp and your going as much as 1325 as stated above. Wonder if they can also go a tad bit more, like 1575Hp?

Reason I'm asking is I also have a 475"BBc that made 785Hp, but was sucking back 1030+CFM at 7200RPM. The Sniper Xflow is rated to 800Hp, but only 900CFM? Do you see this being a issue on my engine that was using 1030+CFM on the dyno? It's sorta a F.A.S.T. style deal we did to try and retain some OEM appearance while at the same time, making some nice power. Was thinking the 800Hp kit could be fun for this streetcar too. Well there all going on the street.

I DO see they are offering the 2X4's 4150 now rated at 1250Hp. So I figure the 2X4 4500 should not be to much longer. I hope they also get the E85 stuff a bit better sorted out for the 800 and 1500Hp deals.
 

·
Registered
Joined
·
1,338 Posts
Bob, I have the little brother for this going on my new motor this year. I think it's 550-518 that's rated at 650Hp, but heard from a guy on Team Chevelle's that those can support about 680Hp. This will be on my daily-driver style 427 BBc. Should be right in the 670/680Hp range were figuring.

Now this 4500 series is rated at 800-1500Hp and your going as much as 1325 as stated above. Wonder if they can also go a tad bit more, like 1575Hp?

Reason I'm asking is I also have a 475"BBc that made 785Hp, but was sucking back 1030+CFM at 7200RPM. The Sniper Xflow is rated to 800Hp, but only 900CFM? Do you see this being a issue on my engine that was using 1030+CFM on the dyno? It's sorta a F.A.S.T. style deal we did to try and retain some OEM appearance while at the same time, making some nice power. Was thinking the 800Hp kit could be fun for this streetcar too. Well there all going on the street.

I DO see they are offering the 2X4's 4150 now rated at 1250Hp. So I figure the 2X4 4500 should not be to much longer. I hope they also get the E85 stuff a bit better sorted out for the 800 and 1500Hp deals.
i wouldnt think 1575 would be an issue. you can run more fuel pressure and "trick" it into not knowing what its doing....lol. i think its got enough fuel to support that. they typically make sure they are on the safe side. it of course isnt going to flow enough fuel for 1500 on e85, thats a lot more injector than it currently has.
 

·
Registered
Joined
·
4,906 Posts
Thank you very much Bob. I haven't looked into these Snipers since I ordered mine in Sept. Seems like they pretty much have everything BUT the 2X4500 covered now. I recall that there seemed to be a gap in Snipers EFI Hp coverage back in the summer. Something about car with about 700 Hp being not supported as the basic kit covers to about 650/680Hp and the next was 800/1500Hp with the 4500. Now they have the 800Hp 4150.

Do you know anyone who has done real-world back to back track test to see how the Snipers compare to a well tuned carb deal? I have seen some on slower, 10 sec. stuff, but be nice to see what the 1300Hp motor would be like ET wise with the carb?

With my stuff ALL going to be on the street just to get some use/time on them, the 2 milder cars are fine. My 706 is getting destroked from 5.3 to 5.0 stroke. Still hoping to be well over 1300Hp N/A. So that single 4500 should be enough. Just curious with 3 guns I'm thinking the WET nitrous systems can supply all the fuel needed?

Your the ONLY I have seen using these on some big Hp engines. THANK YOU.
 

·
Registered
Joined
·
3 Posts
Im wanting to put a 2x4 x4500 dominater flange sniper system on my 565 BBC but just got off phone with holley . Don't have one. BUT they do sell a 2x4 x4500 fuel injection intake for it! part#835061 Why they sell if no system for it?
 

·
Registered
Joined
·
4,804 Posts
Im wanting to put a 2x4 x4500 dominater flange sniper system on my 565 BBC but just got off phone with holley . Don't have one. BUT they do sell a 2x4 x4500 fuel injection intake for it! part#835061 Why they sell if no system for it?
Probably for running 2 dominators? Holley makes intakes for carbs too.
 

·
Registered
Joined
·
1,238 Posts
Did you see above that Bob has done over 1300Hp already without an issue. He even went on to say he think they could support 1575Hp....
Q16 needs a lot more volume than regular race fuel. Not as much as alcohol, but quite a bit more. I don't think Bob is using Q16. Big difference.
 

·
Registered
Joined
·
4,906 Posts
Q16 needs a lot more volume than regular race fuel. Not as much as alcohol, but quite a bit more. I don't think Bob is using Q16. Big difference.
Yes, well ran the older Q years ago. But still think that 4500 would support it.

I looked into those intakes. I was told that a cast single would run better then the 2x4 sniper intake. And that was on a 600+hp bbc. And this was directly from a factory sponsored Holley car/guy.

Your closer with the 4500 EFI then the 2x4 sniper intake on that 565. My thoughts anyway. Could be wrong, but that could happen, just not offen.

Good luck.
 

·
Registered
Joined
·
689 Posts
Been running the stealth 4500 since October on my 34 ford roadster. Engine was a 555 with dart 355 heads. Car weighs 2400 with me in it. Car ran flawlessly. After the learning curve, transferring the learn and smoothing the fuel map twice it was pretty nasty. Just got a new 565 with brodix cnc 3xtra heads that i installed yesterday. Best et with 555 was [email protected] with a 1 14 sixty ft. That motor had a nitrous cam that was done at 6500. Hoping for some 4 90's with new motor and 5.30's leaving in high gear . Also going to the Holley efi training in march.
61363
 

·
Registered
Joined
·
71 Posts
Been running the stealth 4500 since October on my 34 ford roadster. Engine was a 555 with dart 355 heads. Car weighs 2400 with me in it. Car ran flawlessly. After the learning curve, transferring the learn and smoothing the fuel map twice it was pretty nasty. Just got a new 565 with brodix cnc 3xtra heads that i installed yesterday. Best et with 555 was [email protected] with a 1 14 sixty ft. That motor had a nitrous cam that was done at 6500. Hoping for some 4 90's with new motor and 5.30's leaving in high gear . Also going to the Holley efi training in march. View attachment 61363
Beautiful car!
 
21 - 34 of 34 Posts
Top