Ez efi - atomic etc for 500ci
#1562040
01/11/14 09:56 PM
01/11/14 09:56 PM
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Joined: Jan 2003
Posts: 738
Oh Canada
EV2CUDA
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 738
Oh Canada
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I would like to try one of the self learning efi systems.
I think my combo is on the edge for them. Will one support what I have?
500 cube, 11-1, 240 duration solid roller with max wedge stage 6 heads.
It should make 575hp. It's a street car.
It runs a msd digital 6al. Don't know if that matters.
I don't have the engine running yet, but its in its home.
I have an hp1000 Holley but my poor choice as it has no vac ports.
71 Barracuda 383 4spd (500ci)
69 camaro 598, NOS
69 barracuda bbc procharger
77 t/a 6.0 turbo project
78 t/a 400
77 corvette
1983 hurst/olds
03 Viper
79 360 macho
71 demon 360
78 Warlock 5.7 hemi project
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Re: Ez efi - atomic etc for 500ci
[Re: Dragula]
#1562042
01/12/14 12:02 AM
01/12/14 12:02 AM
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Joined: Jan 2003
Posts: 738
Oh Canada
EV2CUDA
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 738
Oh Canada
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My mistake, cam is 262@50 duration. Comp 308r. .575 lift.
71 Barracuda 383 4spd (500ci)
69 camaro 598, NOS
69 barracuda bbc procharger
77 t/a 6.0 turbo project
78 t/a 400
77 corvette
1983 hurst/olds
03 Viper
79 360 macho
71 demon 360
78 Warlock 5.7 hemi project
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Re: Ez efi - atomic etc for 500ci
[Re: EV2CUDA]
#1562045
01/12/14 01:15 PM
01/12/14 01:15 PM
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Joined: May 2004
Posts: 12,397
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,397
Taxes & Virus's R-US, NY
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Quote:
My mistake, cam is [Email]262@50[/Email] duration. Comp 308r. .575 lift.
That is a little tougher...I had trouble with a cam at 244 duration and to go to a custom curve on the distributer to get idle vacuum higher...Basically more timing at idle. This can also have the draw back of being tough to start if you go too far.
At 262 duration, I would be looking at the Sportsman XFI self learning system...you can still use a tbi, but it won't give you the headaches of trying to get the idle and transition to work.
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Re: Ez efi - atomic etc for 500ci
[Re: Dragula]
#1562049
01/13/14 05:16 AM
01/13/14 05:16 AM
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Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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Quote:
Quote:
My mistake, cam is [Email]262@50[/Email] duration. Comp 308r. .575 lift.
That is a little tougher...I had trouble with a cam at 244 duration and to go to a custom curve on the distributer to get idle vacuum higher...Basically more timing at idle. This can also have the draw back of being tough to start if you go too far.
At 262 duration, I would be looking at the Sportsman XFI self learning system...you can still use a tbi, but it won't give you the headaches of trying to get the idle and transition to work.
My 493 has the MP509 which is 248 @ .050. I'm running a Commander Pro TBI which is pretty stone age now and the only way we could make it behave at idle/low RPM was to set it to run alpha numeric under 1800 rpm. The Holley system will allow you to switch automatically. With a big cam there is so much reversion that it just drove the closed loop nuts. Once we went A/N it ran like nails. Starts instantly and idles well even tho the A/F indicates pig rich. If we lean the idle out it runs like crap so we just set the idle where it sounds happy and ignore the A/F.
Kevin
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