I have a 4.6 with standard bottom end 9.5:1 cr, top hat linered block.
Piper V846BP270 cam dur INL280° EXT268°
Procharger supercharger 'hybrid! (after the first one failed!)'
I've been slowly tuning and now runs well.
My latest log can be found here:
What do you think?
Very rich - 9:1 AFR at 6.5psi and 4470rpm, 61% duty cycle and spark at 26degs.
My AFT target was 12.2 at that boost and RPM - does this seem reasonable?
How about the timing - very conservative / ok / or too much?
Any thoughts welcome.
Tom.
Tuning - next steps - 4.6 supercharged RV8
Moderator: phpBB2 - Administrators
Tom
Suggestions are:
In all tables when coolant temp in used, create even entries across the entire engine temp range..I.e. -15 to 105
Smooth your VE table. Autotune has made it look very spikey
WUE needs to be more linear
Tuning with 2 squirts is a lot easy than 4..
You do seem to have very big injectors for a 4.6. 440s would cause lots of flow. .2 squirts would help.
Hope that helps
Suggestions are:
In all tables when coolant temp in used, create even entries across the entire engine temp range..I.e. -15 to 105
Smooth your VE table. Autotune has made it look very spikey
WUE needs to be more linear
Tuning with 2 squirts is a lot easy than 4..
You do seem to have very big injectors for a 4.6. 440s would cause lots of flow. .2 squirts would help.
Hope that helps
Funny enough just changing the 440cc injectors in my supercharged 4.6 to 412cc inuectors
Regards Tony C (COOPS)
![Image](https://www.v8forum.co.uk/images/forumimages/siggypic3a.gif)
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts.![Very Happy :D](./images/smilies/icon_biggrin.gif)
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
![Image](https://www.v8forum.co.uk/images/forumimages/siggypic3a.gif)
MS2 V3.57 Ecu mapable efi and wasted spark ignition.
Procharger D1SC supercharger and Cossie RS500 Intercooler @ 14psi of Boost. 416 RWHP, (boost leak)
Forged 4.8 V8 kitted out with the dogs Cajones of parts.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Sponsored by: www.v8performanceparts.co.uk, www.interpart.biz, www.caprisport.com & www.baileyperformance.co.uk
-
- Forum Contributor
- Posts: 3979
- Joined: Sat Nov 18, 2006 6:22 pm
- Location: Northern Ireland
9.6 is mega mega rich, dont keep running it like that.
440's are not big by any stretch of the imagination, especially considering you are seeing 90% IDC ( although yes this is also insanely rich at the same time )
Get it tuned properly, running excessively rich can hurt the rings, and whilst it says 9.1, I'm presuming that is pegged at that, so could well be richer.
And yes, 12.2 at those low pressures shouldnt be a problem at all.
Timing, dont see any issues with such low boost, so dont see it as needing any more or less for now.
Also a cam with either same as intake or more exhaust duration would do no harm.
440's are not big by any stretch of the imagination, especially considering you are seeing 90% IDC ( although yes this is also insanely rich at the same time )
Get it tuned properly, running excessively rich can hurt the rings, and whilst it says 9.1, I'm presuming that is pegged at that, so could well be richer.
And yes, 12.2 at those low pressures shouldnt be a problem at all.
Timing, dont see any issues with such low boost, so dont see it as needing any more or less for now.
Also a cam with either same as intake or more exhaust duration would do no harm.