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  1. #1
    The Nitrous Outlet Junkie


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    Troy
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    Default Max rpm with 2 bolt main caps

    Okay so there's probably several factors so much I may leave out that are important to figuring out this question. But here is some of the info I have converted my LT1 to a carbureted and distributor setup. Short block is a balanced and Forged rotating assembly: forged Eagle crank, h-beam Manley rods, and probe Sportsman series forged pistons, all of it balanced. The main caps on my Pistons are ARP 2000 Hardware. And my main caps are studded ARP Hardware as well. ... top half is ARP head bolts, Factory heads ( not ported or polished), Weiand team G intake, cam spec by Lloyd Elliot is 235/247 .579/.600 112 lsa... Hardened pushrods, adjustable isky guide plates, 1.6 roller Pro Comp magunam roller rockers. And some beehive Springs match to that camshaft from Lloyd Elliot.

    The motor is still 350 cubes, about 11:1 compression ratio, Ignition is controlled by a MSD digital 6 Plus box.

    I'm sure that there's other pertinent information I'm leaving out but I was wondering what kind of RPM could I safely spin my motor to? ... I would like to go to about 7000 rpms and I know the camshaft should make power to that but I'm not sure if the short block can handle it?

    Yes of course the motors already built and in the car but I don't want to push it too high and wind up hurting it. That being said I also don't want to be shifting before im making good power.

    Last edited by zooguy; 01-24-2018 at 10:03 PM.
    94 Formula "budget build" #thebeaterbird
    10.177 @128.31 on a lil 250 shot
    350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s

  2. #2
    Lurker


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    Joel
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    1996 camaro Police interceptor
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    Default

    What kind of fuel will you be running? Do you have any dyno numbers? When you installed your cam did you set it advance or Retarded?

    Sent from my Moto Z (2) using Tapatalk

  3. #3
    LTX Master


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    Default

    I've spun my two bolt with ARP studs up to 7000 a few times at the track but it doesn't run any faster past 6600. So I've been shifting between 6300 and 6500 for the past 6 years without a problem. When I was pushing the stock short block years ago I would regularly spin that to 6800 and it lasted a couple years before it spun a bearing.
    1995 TA: Converted Nose...381 LT1...4L80E...Moser 12 bolt...Edge TC...
    Best 1/4 10.71 @126, 1.46 60ft, 3450lbs
    http://www.youtube.com/user/MysteryBird1?feature=watch

  4. #4
    The Nitrous Outlet Junkie


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    Default

    Quote Originally Posted by Camaro96 View Post
    What kind of fuel will you be running? Do you have any dyno numbers? When you installed your cam did you set it advance or Retarded?

    Sent from my Moto Z (2) using Tapatalk

    FUEL: VP 110* leaded cut in half with 91* unleaded 100% pump gas ........ so ~ 100* semi-leaded???
    no dyno numbers yet
    no advance or retard when cam installed ... dot to dot
    94 Formula "budget build" #thebeaterbird
    10.177 @128.31 on a lil 250 shot
    350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s

  5. #5
    Lurker


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    Default

    Quote Originally Posted by zooguy View Post
    FUEL: VP 110* leaded cut in half with 91* unleaded 100% pump gas ........ so ~ 100* semi-leaded???
    no dyno numbers yet
    no advance or retard when cam installed ... dot to dot
    I would not hesitate to spin it to 7000 rpm with the ARP studded main caps. Running 11.1 compression all your going to have to watch for is detonation Wich will determine witch will most likely be determined by the mount of timing you will be able to run.

    I'm at close to 6,000 ft in elevation. Hear I have seen two bolt main blocks with ARP studs hold 600 plus horsepower with track abuse. Anymore the 600 with track use on two bolt had a tendency to fail. Mixing the fuel 91 with 110 vp. I'm not sure what the octane rating​ is on VP 110 but it will increase the 91 to higher level.



    Sent from my Moto Z (2) using Tapatalk

  6. #6
    The Nitrous Outlet Junkie


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    Default

    Quote Originally Posted by Camaro96 View Post
    Mixing the fuel 91 with 110 vp. I'm not sure what the octane rating​ is on VP 110 but it will increase the 91 to higher level.


    VP110

    Not your standard 110! Highest rated MON of any 110 fuel on the market. Formulated for use in naturally aspirated engines with CRs up to approximately 12:1-13:1.

    SPECIFICATION


    R+M/2 (Octane) 110
    Size 5 Gallon Pail, 15 Gallon Drum, 30 Gallon Drum, 54 Gallon Drum
    Color Purple
    Oxygenated / Non-Oxygenated Non-Oxygenated
    MON 107
    RON 113
    RVP 6.6
    Specific Gravity 0.72
    Additional Information Spec. Gravity .between 720-.735
    Fuel Type Leaded
    94 Formula "budget build" #thebeaterbird
    10.177 @128.31 on a lil 250 shot
    350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s

  7. #7
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    Default

    Quote Originally Posted by zooguy View Post
    VP110

    Not your standard 110! Highest rated MON of any 110 fuel on the market. Formulated for use in naturally aspirated engines with CRs up to approximately 12:1-13:1.

    SPECIFICATION


    R+M/2 (Octane) 110
    Size 5 Gallon Pail, 15 Gallon Drum, 30 Gallon Drum, 54 Gallon Drum
    Color Purple
    Oxygenated / Non-Oxygenated Non-Oxygenated
    MON 107
    RON 113
    RVP 6.6
    Specific Gravity 0.72
    Additional Information Spec. Gravity .between 720-.735
    Fuel Type Leaded
    Thanks for the info on the VP fuel. I will look into it for my application. Running a sold roller with duration of 288 int 290 ext 110 lob separation running 15# of boost injection instead of carb

    Sent from my Moto Z (2) using Tapatalk

  8. #8
    The Nitrous Outlet Junkie


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    Default

    so 7000 rpm shift point with a rev limiter at 7300 RPM how crazy could that be?
    94 Formula "budget build" #thebeaterbird
    10.177 @128.31 on a lil 250 shot
    350, LT1, carb, LE grind cam, th400, 4k stall, ford 8.8 w/ 4.10s

  9. #9
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    Default

    7300:shift point is not on heard of I know small blocks can be turned 10,000 rpm and stay together I built my boost Motor to be able to 10,000 but my Machinest says if I want it to live for more then a season. With out rebuild to stay 6,500 to 7,000 RPMS but my build is completely different from your being 350. Mine is 385 with 6.0 rods.

    Sent from my Moto Z (2) using Tapatalk
    Last edited by Camaro96; 01-25-2018 at 03:51 PM.

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  11. #10
    LTX Regular


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    Brandon++S
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    Default

    You need to know where your cam makes the most power rpm wise. Sometimes more rpms is not going to make that much more power and you are just taking unnecessary risk.

    Sent from my SM-G930V using Tapatalk

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