Repairing intake manifold fuel distribution issues

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jmarkaudio
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Re: Repairing intake manifold fuel distribution issues

Post by jmarkaudio » Mon Apr 16, 2018 9:39 am

pamotorman wrote:
Sun Apr 15, 2018 9:07 am
swampbuggy wrote:
Sun Apr 15, 2018 8:47 am
Thanks PAMOTORMAN !!! :D
i remember a dyno test at the GM tech center on a NASCAR engine to get equal fuel distribution. the same engine in the race car at Daytona the plugs looked like they came out of 8 different engines. the G forces in the turns have a lot to do with the fuel distribution when using a carb. now you know why NASCAR went to electronic FI
NASCAR teams went to FI because they were forced to, Ask Warp Speed if that was a choice they would have made willingly...
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Re: Repairing intake manifold fuel distribution issues

Post by pamotorman » Mon Apr 16, 2018 11:18 am

jmarkaudio wrote:
Mon Apr 16, 2018 9:39 am
pamotorman wrote:
Sun Apr 15, 2018 9:07 am
swampbuggy wrote:
Sun Apr 15, 2018 8:47 am
Thanks PAMOTORMAN !!! :D
i remember a dyno test at the GM tech center on a NASCAR engine to get equal fuel distribution. the same engine in the race car at Daytona the plugs looked like they came out of 8 different engines. the G forces in the turns have a lot to do with the fuel distribution when using a carb. now you know why NASCAR went to electronic FI
NASCAR teams went to FI because they were forced to, Ask Warp Speed if that was a choice they would have made willingly...
the OEM wanted FI because their race team engineeers were not learning any thing new while NASCAR used carbs but FI did make it easier to tune the engines for performance and durability. it made the adjustmens for ignition timing and fuel flow for each cylinder a lot easier...

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Re: Repairing intake manifold fuel distribution issues

Post by Tuner » Mon Apr 16, 2018 12:16 pm

Did you ever think of this? With EFI, the NASCAR version of OnStar gives Brian France et al a joystick with live control of who has power or not during the progress of a race, a virtual restrictor plate adjustable on the fly.

All else equal, carburetors still make more power.

:lol:

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Re: Repairing intake manifold fuel distribution issues

Post by BILL-C » Mon Apr 16, 2018 12:47 pm

Big Speed wrote:
Sun Apr 15, 2018 6:51 pm
WE dyno with 8 o2s on most builds.Will shape runner entry to grab or shear off more fuel.Sometimes will put dam in adjacent port if it is much richer..Firing order does influence distribution.Bill C.
I agree 100 %
Carlquist Competition Engines

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Re: Repairing intake manifold fuel distribution issues

Post by pamotorman » Mon Apr 16, 2018 1:23 pm

Tuner wrote:
Mon Apr 16, 2018 12:16 pm
Did you ever think of this? With EFI, the NASCAR version of OnStar gives Brian France et al a joystick with live control of who has power or not during the progress of a race, a virtual restrictor plate adjustable on the fly.

All else equal, carburetors still make more power.

:lol:
i believe were the nozzles are placed determines the HP and that is why NASCAR has a spec for that.

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Re: Repairing intake manifold fuel distribution issues

Post by pamotorman » Mon Apr 16, 2018 4:36 pm

Tuner wrote:
Mon Apr 16, 2018 12:16 pm
Did you ever think of this? With EFI, the NASCAR version of OnStar gives Brian France et al a joystick with live control of who has power or not during the progress of a race, a virtual restrictor plate adjustable on the fly.

All else equal, carburetors still make more power.

:lol:
i would think that NASCAR would worry that the crew chief could do this. maybe that is why it took so long for NASCAR to agree to FI

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