202 Turbo Tuning Gremlins - Cleanup Help

[FXST02]

I will try those values this morning and see how things change
What is your flow rate with these injectors? Mine is at .650

It may clean up the lower rpm idle but I imagine it won't make a difference to the partial throttle free-rev nonsense I'm getting between 1200-2000rpm
I will report back soon

May want to check your injector flow rate, in the above message you stated .650 but in the BIN it's 0.065

[antus]

.650 is out of range, it definitely should not be that.

[VK_3800]

0.065 is too high also isn't it, should be under 0.040 for a 202 six cylinder with 60lb injectors if my calculations are right?

[FXST02]

0.065 is too high also isn't it, should be under 0.040 for a 202 six cylinder with 60lb injectors if my calculations are right?

My calcs figure it out as 0.032

[antus]

According to Holden202T's kinjflow calculator here viewtopic.php?f=3&t=334

Lb/hr=60
Cyl Size= 0.55 (550cc, but possible small rouding error here from 202ci)
Fuel type=Petrol

Its:
.036 for 12P, .066 for Kalmaker (perhaps thats the source of the .065 number?)

[RedWagonVC]

Some good suggestions guys
Here are some more logs and the bin prior to the last one i posted

Myself and budwizer are fairly new to all this (me hugely so, i'm only really starting to understand the roles of the tables other than main VE and spark).
The .650 is .0650 of course my apologies.

At this point, what is the consensus on what to change first?
If the injector rate is wrong, maybe i change that and the v offset table to match vk3800's (and subsequenty i'd have to recalc the VE tables to account for the % change in inj rate).
Since the bin is 12P, this means changing to .036 per Antus' post which is a 44.62% decrease
Maybe also replace the lower end of the spark map with stock v6 values, reset the closed throttle VE table to all 50, idle spark to match main spark table and see how it is?


Holden202t did you also see the boost spark table and est boost charge temp offset table? At normal everyday charge temps there is quite a bit of timing commanded out vs main spark table, and it is choppy. Should the reduction be reflected in the main table instead..
I'm thinking surely until charge temps say 65deg plus there shouldnt be anything taken out, then pull it back from there?

[RedWagonVC]

I will also just note a bit more detail on the physical configuration:

202 is .060 OS
Clive cams '174' grind, requested for boost at 2000rpm onward
Comp unsure, but has hypatec dished pistons and 1.2mm head gasket
Gt3076r with .64 ex housing - ramps up from 2000-2800rpm or so
Manual
CTS is currently in the factory VK EFI position which is on the top hose side of the thermostat
Standard HEI ignition (except for the dissy mod and ign module mod to run delco)
LPG plugs gapped .9mm
Walbro gss342 pump and turbosmart boost fuel reg 1:1. 43psi at 0 vacuum

The tune was originally done when the motor was NA with i think 17/19lb injectors and factory VK fuel reg. Then redone with turbo, 60lb deka injectors and factory VK fuel reg. Then again just recently after changing the fuel reg

[v6bucket]

You might find the cold start tuning difficult with the CTS above the thermostat, it would be better located so that it gets the coolant warming with the rest of the engine.

[FXST02]

This may be a bit down the road in tuning but: The 100 columns in:
VE - 20-100kPa Volumetric Efficiency (VE) as a function of MAP and RPM and
VE - Boost Volumetric Efficiency (VE) as a function of MAP and RPM
Should be the same.

Map A: EST - 20-100kPa Main Spark Advance vs MAP and RPM and
EST - Idle Spark Advance as a function of MAP

in the 20 - 40 Kpa column and 800 row should show the same numbers

in the idle spark (MAP A Spark), you have it as
20 22.85 (24.96)
30 29.88 (32.70)
40 34.10 (37.62) and
50 35.16 (37.62)

[Holden202T]

yeah I would definitely start by getting the inj rate right .....

202 + 060 works out to be approx. 0.5674 for cylinder size and I get a .038 inj rate .... and that will offset the ve table approx. 58%.....

ummm .... closed throttle VE shouldn't be in use ?

I normally fit my CTS in the bottom of the thermostat housing, but I also don't have a heater which is what normally uses that port but I don't think that is going to cause any major issues, once the system is up to temp and thermostat regulating flow it should be pretty accurate ....