Inconsistent startup on street ported 12A

mattallac · 02-11-2012, 04:36 AM

Ok well your coils need to be checked for starter , and the specs for your carb are : venturi : 37mm ,Fuel jet no.170 ,air jet no.150,emulsion tube :f-11 and needle valve -no.250 . This is racing beat specs , I have worked with them a lot and for sea level this is a good starting point .RB tends to set the top end of they're tune a little lean ,but a dyno will tell you what you need to add or subtract. Back to your dlidfis :ditch that shit ,use the cap or run DIS . The dlidfis system is a cluster fuck and if it worked that great mazda would have used it to help with its early emission problems. And last of all kill the by pass ,turn it into a dead head system and this will simplify your fuel system ,fuel return systems in carb situations can cause problems ,check your fuel PSI when running .

dr.occa · 02-11-2012, 01:38 PM

Quote:

Originally Posted by mattallac

Ok well your coils need to be checked for starter , and the specs for your carb are : venturi : 37mm ,Fuel jet no.170 ,air jet no.150,emulsion tube :f-11 and needle valve -no.250 . This is racing beat specs , I have worked with them a lot and for sea level this is a good starting point .RB tends to set the top end of they're tune a little lean ,but a dyno will tell you what you need to add or subtract. Back to your dlidfis :ditch that shit ,use the cap or run DIS . The dlidfis system is a cluster fuck and if it worked that great mazda would have used it to help with its early emission problems. And last of all kill the by pass ,turn it into a dead head system and this will simplify your fuel system ,fuel return systems in carb situations can cause problems ,check your fuel PSI when running .

I've already picked up another holley 1-4 psi. It's what I use for my dual side draught set up in my other car and it's always good (knock on wood right).

The DLIDFIS setup is neatly tucked and non-confusing. If anything, I may just go 6AL.

I'm going to go over the IDA jettings just to make sure.

Appreciate ya mattallac

mattallac · 02-11-2012, 01:48 PM

no problem,do yourself a favor and don't waste your time or money on 6al boxes.They only multi spark to 3k ,I Had 2 boxes on my repu and they did absolutely nothing but clutter my engine compartment .

dr.occa · 02-13-2012, 09:01 AM

Quote:

Originally Posted by mattallac

no problem,do yourself a favor and don't waste your time or money on 6al boxes.They only multi spark to 3k ,I Had 2 boxes on my repu and they did absolutely nothing but clutter my engine compartment .

What do you recommend as far as DIS is concerned mattallac? What I currently have at my disposal is a "distributor" from an 87 FC and RX8 COPS and then I have a spare Megajolt Lite Jr. programmable ignition box by AUTOSPORTLABS that uses the ford EDIS modules (<- I can't say for certain if it's proper operation is contingent solely on a 36-1 Trigger wheel).

I'm still learning my way around the rotary ignition which is contributing to my indecision.

mattallac · 02-14-2012, 12:54 AM

I'm gonna use the AEM smart coils (78.00 each).I have a turbo fc in my rx2 so the AEM smart coils have the built in igniters and a small package .I have a Haltech sprint re for the ecu. Im just a big fan of inductive coils ,Its simple and effective .The msd boxes didn't make any difference ,so theye were a big waste of money . I started a coil thread a while ago and a lot of educated guys had some great info about coils .I will admit I am no coil guru ,but simplicity is usually in my best interests .Have you sorted out your hard starting issue?

02-11-2012, 04:36 AM	#1
mattallac Rotary Fanatic Join Date: Aug 2011 Location: crockett ca. Posts: 176 Rep Power: 0	Ok well your coils need to be checked for starter , and the specs for your carb are : venturi : 37mm ,Fuel jet no.170 ,air jet no.150,emulsion tube :f-11 and needle valve -no.250 . This is racing beat specs , I have worked with them a lot and for sea level this is a good starting point .RB tends to set the top end of they're tune a little lean ,but a dyno will tell you what you need to add or subtract. Back to your dlidfis :ditch that shit ,use the cap or run DIS . The dlidfis system is a cluster fuck and if it worked that great mazda would have used it to help with its early emission problems. And last of all kill the by pass ,turn it into a dead head system and this will simplify your fuel system ,fuel return systems in carb situations can cause problems ,check your fuel PSI when running . Last edited by mattallac; 02-11-2012 at 04:40 AM. Reason: add

02-11-2012, 01:48 PM	#3
mattallac Rotary Fanatic Join Date: Aug 2011 Location: crockett ca. Posts: 176 Rep Power: 0	no problem,do yourself a favor and don't waste your time or money on 6al boxes.They only multi spark to 3k ,I Had 2 boxes on my repu and they did absolutely nothing but clutter my engine compartment .

02-14-2012, 12:54 AM	#5
mattallac Rotary Fanatic Join Date: Aug 2011 Location: crockett ca. Posts: 176 Rep Power: 0	I'm gonna use the AEM smart coils (78.00 each).I have a turbo fc in my rx2 so the AEM smart coils have the built in igniters and a small package .I have a Haltech sprint re for the ecu. Im just a big fan of inductive coils ,Its simple and effective .The msd boxes didn't make any difference ,so theye were a big waste of money . I started a coil thread a while ago and a lot of educated guys had some great info about coils .I will admit I am no coil guru ,but simplicity is usually in my best interests .Have you sorted out your hard starting issue?