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Old 07-06-2014, 11:32 PM   #1
mike1965
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Default EFI With no IC

I see some people don't run an IC with EFI and I was thinking of doing this , will I have problems and what kind of problems will I have or can it be done with no problems

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Old 07-07-2014, 01:22 AM   #2
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Default Re: EFI With no IC

Impossible
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Old 07-07-2014, 02:16 AM   #3
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Default Re: EFI With no IC

It depends on power goals, fuel type, meth/water injection yes/no etc. More details needed on combo and goals.
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Old 07-07-2014, 11:16 AM   #4
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Default Re: EFI With no IC

Quote:
Originally Posted by TurboII View Post
It depends on power goals, fuel type, meth/water injection yes/no etc. More details needed on combo and goals.
- 800-1100hp
- pump gas
- Meth/water inj. Yes
-BB Dodge 512ci stroker
- street drivin 2 maybe 3 times a week to a cruz nite
- track time maybe once a year
- auto trans

If you need more let me know

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Old 07-07-2014, 11:19 AM   #5
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Default Re: EFI With no IC

If compression is below 9:1 and your Cam isnt a Tow Cam. YES you can skip an intercooler with V/M
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Old 07-07-2014, 11:25 AM   #6
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Default Re: EFI With no IC

Quote:
Originally Posted by Brillko View Post
If compression is below 9:1 and your Cam isnt a Tow Cam. YES you can skip an intercooler with V/M

Cam is a 528 mopar performance with 112

Comp will be inbetween 9.0 and 9.5
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Old 07-08-2014, 10:04 AM   #7
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Default Re: EFI With no IC

Anyone else
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Old 07-08-2014, 11:05 AM   #8
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Default Re: EFI With no IC

This sounds doable, but I'd expect it to perform a bit better if you added an intercooler.
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Old 07-08-2014, 11:12 AM   #9
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Default Re: EFI With no IC

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Old 07-08-2014, 11:21 AM   #10
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Default Re: EFI With no IC

Pump gas no IC 9.5 to 1 guessing 10 psi max ?????
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Old 07-08-2014, 12:32 PM   #11
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Default Re: EFI With no IC

We have run up to 14psi on a SI trim Vortec SC and straight methanol injection, 9.6CR, forged piston LS1 WITH A2A IC. Made 700hp with no methanol and 18-20* timing. I would really consider E85 if possible for those hp goals. I think it would be on the ragged edge of total destruction if there was one little hiccup on the methanolmethanol and you are done. I think it would also take more than one nozzle as well.
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Old 07-08-2014, 12:53 PM   #12
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Default Re: EFI With no IC

You're just leaving power on the table omitting the aftercooler. Like everyone else says, you're going to be walking a fine line as well. When you get greedy (and you will), there will be no where to go except up in smoke. Make plans for it, and leave yourself some headroom.
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Old 07-08-2014, 01:07 PM   #13
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Default Re: EFI With no IC

yes, its easily doable and I have done this with a few cars. My brothers car is non-IC 93 pump gas single turbo EFI set up. Its been 135 in the 1/4 with a mix of 110 & 93.

My car was a 110 octane non-IC single turbo windsor for 3 years....no issues. went 142 in the 1/4 on 17's.

Eventually I ended up switching to E85 and haven't looked backed.

The IC is not necessary, but you need to keep timing in check. In the end you will make the most power with a good IC...but you will need to factor heat soak.

It depends on what you want. I didn't want the extra weight/obstuction and was willing to run conservative.

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Old 07-08-2014, 04:59 PM   #14
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Default Re: EFI With no IC

Im going to run 5psi on the street and if I want to play I will do a 110 or 112 mix to be safe .

My AIS has 3 nozzle's any recomendations on were to put the nozzle's.

I was thinking of having the meth come on at 8psi to be safe.

What do you guy's think

Thanks for all the info so far great stuff

Mike
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Old 07-08-2014, 11:16 PM   #15
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Default Re: EFI With no IC

I ran an 88mm S400 non-intercooled on a 454 for a while at 11psi and in 90-100 degree days it would only run 120-130 intake temps with 50/50 water/alc injection. On low boost like that if you inject enough methanol you'll take most of the heat out. My concern is if it failed and you're engine is right on the edge you'd be in trouble. I have another car with an intercooler and run a small amount of water/alc injection and had the relay fail one day and not spray.

If you're only going to run 5-8psi on the street then pretend like its an old roots blower and tune accordingly (low timing).
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