Correct me if I am wrong but I think you would need a 70mm MAF to go with your 70mm T/B. I mean you can only shove in as much air as the T/B will allow into the manifold. Does anyone else know? Would you also have to port your inlet to 70mm on your manifold to allow the use of a 70mm T/B an MAF Meter? I know you can buy a Speed Density to MAF conversion kit from Jegs online I think it's somewhere around $80 made by Granatelli. As far as a Cobra ECU goes it's around $550 and it comes with a 70mm MAF Meter and 24lb injectors, also from Jegs. Or you can get the FRPP MAF Conversion Kit which comes with an ECU, MAF Meter and electrical connections for around $550 I'm not sure of the size on the MAF Meter so you may have to ask. You may be able to find this stuff at a cheaper price but you'll have to research it.

STANG1LOV said:

I am looking to to convert my 88 gt convertible from speed density to mass air this winter. What exactly is needed to do this? I'm running a 70mm t/b. What size meter do I need? Since I'm doing this, if I change to 24lb injectors, should I go with a cobra ecu? Do I need a whole new harness? Need some details and advice. Thanks!

Click to expand...

Thanks. I'll check out Jegs. For $550, it seems I'll be better off than buying the cobra pieces off ebay.

Does anyone else have any more insight?? Is this a difficult swap? Do I need to change the whole harness? MAP sensor? Any hidden parts or tricks I need to know for this conversion??

PS- More info on the current fuel system: Typhoon polished upper/lower, EGR block off, cold air pipe (will modify for the MAF), upgrading to 190lph pump and adjustable pressure reg., new 19# injectors (will change if going cobra)

conversion

if you convert to cobra, you HAVE to have a MAF that is specific for the cobra computer. you'll need to get a harness from an 89. 90-93 have different connectors. you can use your stock harness and re-pin the MAF harness into it. if you have the money and patience, look for an A9L or A9P. both are extremely popular but usually run a minimum of 125. A9P is for an automatic but can be used for manual cars; it just has a stronger fuel curve. as for the injector matching and meter sizes, i'm not good with it but there are calculators online for that. hope this helps

I just put a mass air computer on the classified page