https://www.homemadeturbo.com/forum/...;threadid=4289 ahh there we goso after reading this .....it sounds like by retarding ur timing at the dizzy u will be fine just loosing some low end power, from what i gather using a btm with a afc is a waist and wont work? i dont see why,josephexplained it but none of it stuck in my brain is there any other way of explaining this

 

I was getting some hesitation above 4500 RPM which I think is caused by my spark plugs.

Anyway, I was sick of getting the code 13 (barometric press) on my OBD2 set-up D16y8 VAFC DSM 450cc/resistor box. I decided to go ahead and try a conversion to P28 OBD1. The difference is amazing! It pulls harder. However my stock idle is acting up. I tried both enriching it all the way to -20% to leaning it to -42% at both Hi-Lo Wide and Narrow at 1000-4000 RPM but I still could not get it right. Any suggestions?

 

Maybe you have a seperate problem. Check the IACV.
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It wasnt doing it before with the OBD2 ECU. I did the conversion in a matter of minutes. I had to drive to my friend's house to pick up the ECU and did the conversion before I left his house. The car was idling fine with the OBD2 ECU. I may have to plug the OBD2 again to continue troubleshooting. I have another OBD1 ECU as well, I will try that too......

 

Fixed! I changed the setting to -25% on the low cam at the 1000 RPM range. I also changed my toasted spark plugs. Idles normal again.....

BTW: OBD1 P28 makes such a whole lot of a difference on this mod. My cars pulls harder than ever!

 

Does it sound like its going to stall when it idles then picks back up?

if so your running to rich at idle causing it to bog, same thing happen to me.

 

Yep. That should be the ECU trying to correct itself. No probelm now, except sometimes it takes 2-3 tries for me to start the car like the OBD2. I dont mind it tho.....

 

Spent the whole week reading through all the topics and I have a clear view at the possible boost options. I prefer the AFC-hack. I'm ordering my turbo stuff tomorrow, will or will not my setup work well?

B16, stock compression
T3/T4 super 60
tial wastegate @ 8 psi
KN filter
680x117x74mm Forge intercooler
BOV
2 degree colder plugs
retarded timing (~4 degrees)
Walbro 255 pump
FPR
370 or 450cc peak hold injectors
resistor box (stock)
V-AFC
New preheated lambda's
all the nesseary gauges

Is a BTM nessesary?

 

The BTM is not necessary but it will surely help you out for ease of timing adjustablilty once you start tuning your set-up.... the list looks good. Where are you buying your turbo?

 

The BTM is not necessary but it will surely help you out for ease of timing adjustablilty once you start tuning your set-up.... the list looks good. Where are you buying your turbo?


Why ..can you supply me cheaper? It's a t3/t4 with .57 compressor wheel and .50 compressor .63 turbine , should boost at ~3500rpm

I'm also still looking for injectors, RC doesn't sell 450 peak/hold