What is your combo?How do I determine what size injectors to use?
Ding ding dingEarly EGR style explorer intake. Circa 1996/1997.
the heads are standard GT40 heads. Flip them over and there might be a part number cast to the underside near the pushrod guides. F1ZE would indicate early 1996 explorer GT40 heads.
that casting number on the heads indicates 1995 manufacturing dates. One in Jan and the other Dec.
As noted in the post above, GT40 heads with explorer intake IIRC. Ill post pics again for reference:What is your combo?
For the next upgrade, it’s trivia time:
Who can tell me the types of vehicles these are from?
How do I get to 24#'s?19#s are fine for that.
Are their mobile auto ac evac services?
Thanks for the response.With just what you have,you don't need a bigger injector. If you haven't already,a fuel pump upgrade wouldn't hurt,just a 110 or 155lph and an adjustable fuel regulator wouldn't hurt. You are correct in if you change injectors,you need to change MAF as well. I went 13.20 on a STOCK 5.0 engine over 20yrs ago.
Something like this Im assuming: https://lmr.com/item/M9486A50/1986-95-Mustang-Ford-Racing-50L-Gt40-Cobra-Upper-Intake-GaskI dont want to ask a stupid question, but how do I find the right gasket for this upper/lower combo?
The GT40/Cobra/Explorer intake entrances can easily be ported to 70mm, which brings us to our next throttle body size, the 70mm. If you don't want to do any porting whatsoever, stick with a 65mm throttle body on your GT40 style intake. Most aftermarket intakes have at least a 70mm entrance, and usually 75mm. The 70mm throttle body has an effective area of 3,149 mm², a 52.7% increase over stock.
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