Pro Systems SV1

Discussion in 'Race 400/430/455' started by Philip66, Jul 16, 2017.

  1. Philip66

    Philip66 Well-Known Member

    Just wondering if anyone has tried the Pro Systems SV1 carb? I did a search on here and didn't get any hits. It's been out for a couple years now and they may have the bugs worked out of it. It's a single Venturi carb similar to a Flying Toilet that is supposed to eliminate any "clean air" which is air that passes through without mixing with any atomized fuel. It looks like there are some positives and negatives listed in reviews online and I was just wondering if anyone on here has tried one or if you know someone who has.

    Thanks!!
     
  2. standup 69

    standup 69 standup69

    two of my furd buddies run them . both swear by them on the dyno and track
    one is a 394 sbf makes around 800, the other has run it on both a 471" Windsor around 880 hp and on his 400sbf comp engine makes just shy of 1000hp
    some love them others not so much
     
  3. BrianTrick

    BrianTrick Brian Trick

    Dale Cubic is the only place I get carbs anymore. Very happy with all of his builds.
     
  4. Bens99gtp

    Bens99gtp Well-Known Member

    I have one for my 464 build, te2 cnc ported heads. Motor is going together now, looking to make 750ish maybe a little more. Heads going on my refresh 464 with 11.5 compression, new block being built with girdle and good rods looming for 13.5 to 14 for block.

    I loved my prosystems 4150 I had and have all the confidence my sv1 with work as Patrick says
     
  5. Philip66

    Philip66 Well-Known Member

    Well I took the plunge yesterday and ordered one from JEGS to put on Rick Millers old car. I've been chasing gremlins every time I take it out.
    First it was the spark plugs, it looked like they had almost closed up while sitting over the winter. (Never seen that before!!) Then it would miss and break up after going into 2nd. That ended up being a corroded magnetic pick up in the MSD distributor. Then the MSD 7 ignition box decided it was overworked and underpaid so it quit!!
    Rick said it was always a 9.7-9.8 car and others have said the same thing, but the best I've been able to manage is a 10.23 at 139 mph. So I'm gonna replace the Quick Fuel 1250 with the SV1 and try to find the lost 4.5 tenths.
    If the weather looks good I'm thinking of heading to Norwalk this weekend to try it out! Anyone else heading out there??

    Thanks!!
     
  6. Bens99gtp

    Bens99gtp Well-Known Member

    Let me know how you like it, if you need assistance you won't find a better company than prosystem. I have even called them on Sat from the racetrack. The av1 is not tuned lime like a regular domint or 4150 in the fact you can actually tunexpected certain rpm ranges not just main metering.

    What size butterfly dud you get mine is the 110mm I had to open my sp2 intake a lot to get the butterfly to even open up
     
  7. BrianTrick

    BrianTrick Brian Trick

    I should be there
     
  8. Todd69GS

    Todd69GS Silver Level contributor

    MPH is definitely there. Those MSD pickups are notorious for rusting. Good luck with the SV1
     
  9. Philip66

    Philip66 Well-Known Member

    I thought I was getting the 110, but when it got here there is conflicting info on the paperwork. In one place it says 110mm and then in another spot it says the "plate opening" is 98mm. I'm interpreting the plate opening as the butterfly and maybe I'm wrong in doing so.
    It's interesting to me that it came in a plain brown wrapper. Unmarked cardboard, no owners packet or info, not even any basic instructions or guidelines. The only thing that came with it is a build sheet showing an order number and the jets used.
    I bought a new Quick Fuel 1050 for my 70 GS455 last year and it came with a book in three languages, notices of all kinds, various pamphlets, decals, warranty card, etc... The SV1 looks brand new and doesn't smell like gas or have any bolt marks on it where it might have been bolted on and returned. Who knows?
    I think I may try to call Patrick tomorrow just to make sure everything sounds alright to him before bolting it on.

    Philip T.
     
  10. Philip66

    Philip66 Well-Known Member

    I have an HVH Super Sucker on it now but that's gonna have to go with the SV1.
    I figure I will just get an open plenum spacer to isolate the carb from the intake a little.
    Hey Bens99gtp, were you going to use a spacer on yours at all? I don't know if that would alleviate the need to do any re-shaping on the intake opening...or maybe using a spacer is not recommended for use with the SV1....but how would I know since I didn't get any information with mine!! LOL

    Philip T.
     
  11. Bens99gtp

    Bens99gtp Well-Known Member

    I am using the sp2, I had a lot of work done to by Bob at finish line when he did my heads pic 1 is how I received it from him with a 4500 gasket on top, my 110mm would not open at all, I ended up taking the intake and having the rest of those pads cut off. I have an old .038 piston which is slightly bigger than my butterfly, it now fits all the way to the floor of my intake.

    I plan on running a spacer, when I talked to Patrick he said a normal dominator gasket and spacer works. I plan on getting the mach 2 spacer from them along with their throttle bracket.

    Be aware the bowl and metering block gaskets are not 100% the same as normal holly stuff. But the gaskets are very reasonable from them at under 2 bucks each.

    I did not get a lot of stuff with either carb I bought either, just a build sheet showing jetting range and all the info I can't read but means something to them..

    I will add a pic tomorrow of my opening now after machining
     

    Attached Files:

  12. Bens99gtp

    Bens99gtp Well-Known Member

    I will be looking forward to hearing how you like it. I am guessing it will take me some tinkering to get it fully tuned on my car, I only wish I had a a good dominator to swap and see what the difference is between them.
     
  13. Bens99gtp

    Bens99gtp Well-Known Member

    Intake now after finial machining
     

    Attached Files:

  14. Bens99gtp

    Bens99gtp Well-Known Member

    Though if this weather does change nothing is going run what it should or could, Norwalk will be greasy and the DA has got to be terrible.
     

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