Aftermarket ECU Needed With Big Mods on NA Engine?

1. boylin Infrequent Poster Joined: Jun 2013 Hall Green / Birmingham Posts: 139 VTS Track Car

   #1 14th September 2014, 21:27

   As title really, do we need an aftermarket ECU like an Omex etc with the following mods, or can the standard ECU cope with a remap?
   
   I thought an aftermarket ECU was needed for things like a turbo, supercharger, carbs etc?
   
   Mods:
   
   Polished & ported head
   Larger inlet valves (+1.5mm)
   Larger inlet ports
   Throttle bodies
   BP285H or BP320 cams
   Hard valve springs and solid lifters
   Forged rods + arp bolts
   Forged high comp pistons
   Rev limiter at 8500
   4-2-1 with decat and non res
2. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #2 14th September 2014, 21:28

   With that spec it'd be best to use an aftermarket mappable ECU like DTA or OMEX.
3. user_64763 Established Member Joined: Jun 2013 York Posts: 2134 Citroen Saxo VTR (2001)

   #3 14th September 2014, 22:50

   How have you got the rev limiter to 8500rpm with a standard ecu and map?
   
   
   Sent from my iPhone using Tapatalk
4. boylin Infrequent Poster Joined: Jun 2013 Hall Green / Birmingham Posts: 139 VTS Track Car

   #4 15th September 2014, 06:50

   I haven't, thats what we want the rev limiter at when we fit the new rods and pistons along with some other bits like the cams, throttle bodies, head etc.
   Got all the bits almost ready to fit and don't want to find out we cant get it remapped until we get another ecu, wanted to make sure.
5. welshpug Saxperience Forum Bum Joined: Jul 2010 South Wales Posts: 3078 ZX 16v, 205 GTI, 309 Goodwood, 405 MI16.

   #5 15th September 2014, 07:35

   You dont set the limiter to 8.5k just like that, you set it just past where it makes power, if built properly itll be lower and if you want it to last itll be lower.
6. Alex-W Newbie Joined: Apr 2013 Durham Posts: 10 BMW 1 Series

   #6 15th September 2014, 10:38

   Wayne at Chip Wizards 'can' map the standard ECU for use with throttle bodies but in my opinion it would be a serious restriction and compromise not worth taking.
   
   A standalone will be much more advanced and a safer, more comprehensive solution. As people always say, determine which ECU to use by asking what your chosen mapper prefers.
   
   I know Sandy Brown who is probably the best NA mapper in the country for these engines likes to use the DTA S40.
   
   ATSpeed have plenty of experience with Omex.
   
   Northampton Motorsport- Emerald.
   
   etc etc...

   1 user thanked this post: raunchz