Mark VIII MAF and blue top injectors?

Topic: Mark VIII MAF and blue top injectors? (Read 1326 times) previous topic - next topic

Mark VIII MAF and blue top injectors?

January 05, 2007, 11:36:36 PM

I'm just trying to figure out if these are going to work on my HO swap. The engine is a GT40p explorer and I'm going to be running an E-303 cam, 1.6 RR's with MAC headers and maybe a ported lower intake . I know that the on the MAF will either have to be ground off or have an adapter built, I just want to know if it will function properly.

I found this auction for a Mark VIII MAF (80mm):
http://cgi.ebay.com/ebaymotors/80mm-MAF-Taurus-SHO-Mustang-5-0-Thunderbird-Mark-VIII_W0QQitemZ160070763760QQihZ006QQcategoryZ38634QQrdZ1QQcmdZViewItem
And these two for 24# injectors:
http://cgi.ebay.com/ebaymotors/ford-mustang-4-6-5-0-bluetop-fuel-injectors-24lbs-24_W0QQitemZ270074735177QQihZ017QQcategoryZ33554QQrdZ1QQcmdZViewItem
http://cgi.ebay.com/ebaymotors/FORD-24-FUEL-INJECTORS-MUSTANG-86-95-LOOK_W0QQitemZ290067700580QQihZ019QQcategoryZ33554QQrdZ1QQcmdZViewItem

Mark VIII MAF and blue top injectors?

Reply #1 – January 06, 2007, 04:32:09 PM

Got the injectors now I think, does anyone have any ideas on the Mark VIII MAF?

Mark VIII MAF and blue top injectors?

Reply #2 – January 08, 2007, 01:15:20 PM

Anyone?

Mark VIII MAF and blue top injectors?

Reply #3 – January 08, 2007, 02:01:06 PM

According to the ACCel chart here: http://go.mrgasket.com/pdf/DFIFuelInjectors.pdf , the stock replacement for a Mark VIII would be a 26 pound injector. Running that particular MAF with 24's may make you run a tad leaner than normal if it were on a DOHC 4.6. With your setup that you have mentioned that combo SHOULD be OK. A lot depends on your fuel pump size and fuel pressure as well.

Here's some food for thought. On my TFS head/cam/intake motor I run a 255 lph pump and a regulator set at 62 PSI through 19 pound injectors and a 73 MM MAF. No check engine codes and great idle characteristics and part throttle response. Also, this feeds the motor adequately all the way to redline (6000 RPM). 62 PSI makes a 19 pound injector flow as a 24 would at 40

Mark VIII MAF and blue top injectors?

Reply #4 – January 09, 2007, 12:10:08 AM

Yeah, I like that chart. Well I got the 24s on the way. I have a Kirban pressure regulator and Walbro 255lph pump in the garage so I should be able to get it running well right away. I also plan on a custom tune eventually. I guess I better get moving on this first, the engine is still sitting on the stand and I can't decide if I want to have the lower intake ported.

Mark VIII MAF and blue top injectors?

Reply #5 – January 09, 2007, 12:22:19 AM

Stock HO intake or Explorer intake? If an HO, I would absolutely port it.

Mark VIII MAF and blue top injectors?

Reply #6 – January 09, 2007, 07:02:07 PM

It's the explorer intake. I got the whole engine with accessory brackets, some wiring, injectors, fuel rails, upper and lower intake, headers, and flywheel for $450. 83k miles

Tmoss said it probably wouldn't be worth a huge gain and wouldn't be woth porting unless I was porting the heads also