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09-13-2013, 02:21 PM
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#31
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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Shifting the Boss at 7750 right now and plan on staying there until the winter when I do the crank trigger wheel, Boss springs and tensioners, and the 11mm/290° Cobra Jet exhaust cams...then I'll go to 8000
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2010 GT500
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09-13-2013, 02:29 PM
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#32
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Senior Member
Join Date: Jun 2012
Posts: 5,594
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Originally Posted by SlowGreyGT
I'm interested in seeing your results. That kind of power with bolt ons and a stock longblock would be impressive. The problem with it is having to rev the hell out of the stock valvetrain. In a couple more years I bet we start seeing a lot of cars running the Boss intakes spinning them in the upper 7k range starting to have valve/springs issues.
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Originally Posted by Yagermeister
Shifting the Boss at 7750 right now and plan on staying there until the winter when I do the crank trigger wheel, Boss springs and tensioners, and the 11mm/290° Cobra Jet exhaust cams...then I'll go to 8000
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Yeah, I would just wait and do all that at once just to avoid any potential headaches.
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09-13-2013, 02:36 PM
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#33
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Banned
Join Date: Apr 2013
Location: Gainesville,Tx
Age: 38
Posts: 2,405
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Originally Posted by SlowGreyGT
I'm interested in seeing your results. That kind of power with bolt ons and a stock longblock would be impressive. The problem with it is having to rev the hell out of the stock valvetrain. In a couple more years I bet we start seeing a lot of cars running the Boss intakes spinning them in the upper 7k range starting to have valve/springs issues.
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I agree.
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09-13-2013, 02:38 PM
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#34
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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People are not having any headaches shifting at 7750 and are making the numbers mentioned without having to spin it higher right now so I'll be happy for awhile
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2010 GT500
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09-13-2013, 02:55 PM
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#35
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I> /\/\
Join Date: Jun 2012
Location: A fender ahead of BlownAltered
Posts: 7,562
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Originally Posted by Yagermeister
People are not having any headaches shifting at 7750 and are making the numbers mentioned without having to spin it higher right now so I'll be happy for awhile
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Stock longblock including cams/valvetrain, stock heads, through an auto making 490rw? LOL, you're asking an aweful lot of that lil smallblock and expecting to it live.
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09-13-2013, 03:01 PM
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#36
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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Steve I said 450-490 depending on choices of parts and fuels. I never said I will get 490. If I get 450 on 93 I'll be happy...however...my car will not see a dyno so we won't know numbers but we will see track times...shooting for 10's in cool and warm weather like wbt
:beers:
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2010 GT500
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09-13-2013, 03:27 PM
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#37
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Member
Join Date: Aug 2012
Location: Burleson
Posts: 30
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Originally Posted by Yagermeister
Steve I said 450-490 depending on choices of parts and fuels. I never said I will get 490. If I get 450 on 93 I'll be happy...however...my car will not see a dyno so we won't know numbers but we will see track times...shooting for 10's in cool and warm weather like wbt
:beers:
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I'm interested to see how it turns out for you. I might do this early next year. I have the pulse ring, upgraded valvetrain, built motor with billet gears and stage 3 cams. I haven't had mine on the dyno yet but hopefully will be attending the dyno day at TS. Keep ua posted!
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2012 base GT MT, 3.73s, Steeda shifter, Boss intake, jba LT headers Roush wheels
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09-13-2013, 07:35 PM
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#38
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Senior Member
Join Date: Jul 2012
Location: Roanoke, Texas
Age: 39
Posts: 818
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I've heard the CJ manifold picks up more power earlier than the boss maybe a 1000 rpm difference? Not sure if that power is more than stock at 4500-5500 but the losses are less in that range than t he boss manifold and it has more potential for peak horse power due to revving super high.
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Airaid CAI | Borla S-Type Catback | Amsoil 10w30 and MTG Trans. Fluid
382hp 387ft/lb | 1/4: 12.9 @ 112mph
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09-14-2013, 03:25 AM
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#39
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Senior Member
Join Date: Aug 2013
Posts: 186
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Originally Posted by Yagermeister
Shifting the Boss at 7750 right now and plan on staying there until the winter when I do the crank trigger wheel, Boss springs and tensioners, and the 11mm/290° Cobra Jet exhaust cams...then I'll go to 8000
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You won't get 8K out of the auto processor. The only way you are going to get there is with a non-computer controlled auto and a Boss processor.
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09-14-2013, 09:21 AM
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#40
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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For a test, a tuner gave me a tune last year that had some special work done that let the auto shift at 8100 but I felt valve float or the car missing due to no trigger wheel. After three passes we took it off my car...so it is possible but not recommended until the trigger wheel and valvesprings are upgraded.
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2010 GT500
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09-14-2013, 09:51 AM
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#41
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I> /\/\
Join Date: Jun 2012
Location: A fender ahead of BlownAltered
Posts: 7,562
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I will never understand why some people feel the need to spin a stock motor out of its effiency range when there is so little power to be found there and ends up doing more damage than anything else.
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09-14-2013, 09:58 AM
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#42
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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With the exception of rods and pistons along with heads that flow only marginally better, our GT engines with a Boss intake are NEARLY identical to that of a Boss engine. The Boss 302S and 302R teams spin it that high for hours on end. For a quick 10-11 seconds we are good. Those race teams must not know what they are doing spinning it that high
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2010 GT500
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09-14-2013, 10:04 AM
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#43
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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The Boss intake changes where the GT motor is efficient by moving the powerband higher. The CJ does the same but even higher than the Boss
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2010 GT500
Last edited by Yagermeister; 09-14-2013 at 10:06 AM.
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09-14-2013, 10:24 AM
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#44
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Banned
Join Date: Apr 2013
Location: Gainesville,Tx
Age: 38
Posts: 2,405
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Originally Posted by Yagermeister
With the exception of rods and pistons along with heads that flow only marginally better, our GT engines with a Boss intake are NEARLY identical to that of a Boss engine. The Boss 302S and 302R teams spin it that high for hours on end. For a quick 10-11 seconds we are good. Those race teams must not know what they are doing spinning it that high
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Rods and pistons can have a big affect on Rpms espeically if the weight is different.
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09-14-2013, 10:31 AM
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#45
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Senior Member
Join Date: Jun 2012
Location: Plano TX
Posts: 383
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re-rx7, you are correct but have you seen the Boss rods and pistons? They look and are nearly identical to a GTs except for the process in which they are made. They are also nearly the same weight so I don't think that argument can be used here...but I've been wrong before as my wife tells me
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2010 GT500
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