Tuning a 383 to start easier

***popo8*** · 05-10-2016, 07:45 PM

Originally Posted by SSlowBoat

Car runs like a raped ape now and starts alot better. Basically prime key twice bump it'll spin over catch and die, prime key once more crank and fires off, idles a little rough until plugs get warm enough. Once the car is warm it'll fire right up barely bumping the key

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Thats one hell of a sequence...

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**Ltconvert** · 05-11-2016, 03:24 AM

I'm afraid to have any changes made don't want to lose anything that I've gained

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**Injuneer** · 05-17-2016, 10:59 AM

Cycling the key is the typical cure for a fuel system that bleeds off pressure too fast after the pump stops priming.

**Ltconvert** · 05-17-2016, 11:00 AM

Tried that seems to make it worse

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**firebird_1995** · 05-17-2016, 11:42 AM

Osie I think what you are doing that may be helping the car to start by priming so many times is adding fuel to the cylinders. I would try to increase the start volumetric efficiency cells to richen it up and see it that helps (without the key cycle sequence )

**Ltconvert** · 05-17-2016, 12:05 PM

Shaun and I have been working with Jeff he's got it better and she's still happy on the wot side

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**SSlowBoat** · 05-17-2016, 02:28 PM

Originally Posted by firebird_1995

Osie I think what you are doing that may be helping the car to start by priming so many times is adding fuel to the cylinders. I would try to increase the start volumetric efficiency cells to richen it up and see it that helps (without the key cycle sequence )

Worked with Jeff creech from Carolina auto masters and he squared it away so it's alot better. I kinda gave osies spare computer to @Catmaigne at dyno day since he bricked his, so once he returns a good one then we will play with the tune some more. But now, the car is very driveable and he is putting a few miles on it. He needs a tire baaaaaad, so can we all push the issue for @Ltconvert to get some tires asap LOL

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**SSlowBoat** · 05-17-2016, 02:29 PM

Originally Posted by Injuneer

Cycling the key is the typical cure for a fuel system that bleeds off pressure too fast after the pump stops priming.

That's a possibility, the shop it was at changed the secondary fuel pump and who knows if they maybe messed something up with the primary.

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**Injuneer** · 05-17-2016, 04:52 PM

Originally Posted by Ltconvert

Tried that seems to make it worse

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My response was for the original poster (SSlowBoat). Process he described seemed to involve cycling the key 3 times (2 + 1), and it helped???????

***popo8*** · 05-17-2016, 05:17 PM

Originally Posted by SSlowBoat

Worked with Jeff creech from Carolina auto masters and he squared it away so it's alot better. I kinda gave osies spare computer to @Catmaigne at dyno day since he bricked his, so once he returns a good one then we will play with the tune some more. But now, the car is very driveable and he is putting a few miles on it. He needs a tire baaaaaad, so can we all push the issue for @Ltconvert to get some tires asap LOL

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Whats wrong with the tires on the new vette wheels?

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