Ecu on a 302 to a 306 - Mustang Evolution

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Old 05-13-2012, 11:21 PM   #1
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Ecu on a 302 to a 306

If I bore my motor out to a 306 what if any work will need t be done web it comes to the ecu?
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Old 05-13-2012, 11:42 PM   #2
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I would suggest a custom dyno tune, especially if it's for the sn95 5.0. Your stock computer will work, but adjustments to timing curve, A/F ratio, etc. must be made for it to run at it's full potential.
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Old 05-13-2012, 11:51 PM   #3
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Thanks ! How much does a dyno tune usually cost ?
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Old 05-14-2012, 12:17 AM   #4
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Quote:
Originally Posted by Storm13_5.0
Thanks ! How much does a dyno tune usually cost ?
Usually around 400-500 depending on who's doing it and what area
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Old 05-14-2012, 06:28 AM   #5
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That's not too hatefull, I thought it be worse ... I've herd it will make your car run better then ever
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Old 05-14-2012, 06:54 AM   #6
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Just boring will not require a tune. But with the other upgrades you have been talking about it may.
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Old 05-14-2012, 08:13 AM   #7
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I mean gotta be done gotta be done ! Long as its not a waste
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Old 05-14-2012, 08:29 AM   #8
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Like I said. If you did a stock rebuild .030 over. Then don't do it. If you do hci then well worth it.
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Old 05-14-2012, 08:36 AM   #9
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I plan on hci just to do it all at once ..
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Old 05-14-2012, 12:04 PM   #10
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For the time and money I would just do a 331 and cal it a day
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Old 05-14-2012, 02:04 PM   #11
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But I kinda have to worry about ffuel milage a lil bit
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Old 05-14-2012, 03:05 PM   #12
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If your motor is properly built with the right parts then I wouldn't worry to much about mpgs. They won't change to much.
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Old 05-15-2012, 10:18 AM   #13
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Sweet that's always good to hear lol

---------- Post added at 09:18 AM ---------- Previous post was at 09:17 AM ----------

I got 20 off my last tank
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Old 05-15-2012, 10:35 AM   #14
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Re: Ecu on a 302 to a 306

A better performing engine is usually more efficient.The big losses in fuel mileage are usually caused by poor tuning and/or a heavy right foot.


Driven conservatively I can eke around 24- 26 MPG out of my much modified 86' GT.
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Old 05-15-2012, 10:37 AM   #15
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So the HCI and 306 rebuild if it's done right won't kill my fuel milage ?
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Old 05-15-2012, 10:45 AM   #16
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Re: Ecu on a 302 to a 306

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Originally Posted by Storm13_5.0 View Post
So the HCI and 306 rebuild if it's done right won't kill my fuel milage ?
Nope.


I don't know what my car was capable of before all the mods, but I doubt it was much if any better.
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Old 05-15-2012, 10:46 AM   #17
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This is good to hear
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Old 05-15-2012, 04:28 PM   #18
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Quote:
Originally Posted by Trojan Horse
A better performing engine is usually more efficient.The big losses in fuel mileage are usually caused by poor tuning and/or a heavy right foot.

Driven conservatively I can eke around 24- 26 MPG out of my much modified 86' GT.
but you forgot to mentioned, with a more modified motor its harder to keep the foot out of it.
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Old 05-15-2012, 04:58 PM   #19
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Re: Ecu on a 302 to a 306

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but you forgot to mentioned, with a more modified motor its harder to keep the foot out of it.
Yeah, there is that issue to contend with.
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Old 05-16-2012, 10:19 PM   #20
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True that!
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Old 05-17-2012, 10:02 PM   #21
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Quote:
Originally Posted by Storm13_5.0
Thanks ! How much does a dyno tune usually cost ?
My car was dynoed 3 weeks ago and cost me $450 but I already had a chip from SCT so if you need to buy the chip too your looking closer to $600 for Chip and custom tune!!
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Old 05-19-2012, 01:47 AM   #22
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Damn.. Not too cheap..
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