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Timing retard with ATI & intercooler

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Old Jun 9, 2005 | 01:41 PM
  #1  
anesthes's Avatar
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From: SALEM, NH
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Timing retard with ATI & intercooler

Folks that have ATI intercooled blowers. Does ATI give you a device like a BTM to retard ignition timing, or do you run normal stock timing and just add fuel via FMU ?

Just trying to compare how ATI does it, vs Vortech, vs OEM.

-- Joe
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Old Jun 9, 2005 | 03:09 PM
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From: Gambrills, Md
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No timing retard, just the FMU.
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Old Jun 9, 2005 | 03:20 PM
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From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Originally posted by Lo-tec
No timing retard, just the FMU.
Thats really interesting.

OEM stuff retards timing, and vortech uses a BTM.

Retarding timing under boost spikes cylinder temperature. I'm wondering if ATI has the right approach. Since i'm intercooled, I'm thinking of ramping out timing to max around 3200rpm and leaving it there.


-- Joe
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Old Jun 9, 2005 | 04:24 PM
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From: albuquerque
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Those air to air intercoolers allow you to run full timing all day long. ATI has got some quality parts. Btw Im still using the FMU
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Old Jun 9, 2005 | 05:02 PM
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From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Originally posted by CRZYTRN-92Z28
Those air to air intercoolers allow you to run full timing all day long. ATI has got some quality parts. Btw Im still using the FMU
Thats why I put an intercooler in for this year.

In regards to the FMU, I ditched that a while back. I like being able to tune fuel, rather than assuming the fuel requirements will be linear with boost.

-- Joe
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Old Jun 9, 2005 | 07:27 PM
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From: Gambrills, Md
Car: clapped out 84Z
Engine: 355 efi roller
Transmission: tremec TKO
In regards to the FMU, I ditched that a while back. I like being able to tune fuel, rather than assuming the fuel requirements will be linear with boost.

-- Joe [/B]
FMU works, but tuning it yourself will allow you to get the most out of your combo. I've never done a WBO2 on one, but I'm sure they err on the safe side with the FMU.
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