I need help with my NOS quick

302crew · 11-06-2001, 04:51 PM

i need to know if the jetting for a 150 shot is 67/42 and if it is what the hell is a shim i can never get a straight answer form the nos people i figured you guys probably could help alot more also they told me that 59/42 is a 75 shot and now to find out i think its about a 135 shot any help would be very apriciated. Also if you know how shims work please let me know

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306 edelbrock heads bcam full mac exuast 1.7 rr 373 rear hd clutch tremec holley fp reg (it sucks) extune honed upper intake 75shot of juice

Five0 · 11-06-2001, 05:31 PM

The jets are 67-nos and 42-fuel.

It's kind of hard for me to explain but I will try.

The shim you need is a 42-thousandths and you can get it from an auto parts store, not a shim but a washer that will work just as well.
The blue thing that has a vacuum hose that connects to your fuel pressure regulator; screw the bottom of that off and you will see a spring; put the washer at the bottom and put the spring back on. You will see what I am talking about when you unscrew it.
The correct washer will just barley fit around the post that the spring sets on and there is a rubber ring around the post, push it over that, it will be a little tight.
Then put it back together and your done.

If you know anyone that has a micrometer you can use that to find the correct size.

The only thing I would watch out for is the bottom of the regulator (the blue thing) has a bevel and I would make sure the washer you get fits flat on the bottom.

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James Cox
nochevy@hotmail.com
1991 Mustang LX

11-06-2001, 04:51 PM	#1
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	I need help with my NOS quick i need to know if the jetting for a 150 shot is 67/42 and if it is what the hell is a shim i can never get a straight answer form the nos people i figured you guys probably could help alot more also they told me that 59/42 is a 75 shot and now to find out i think its about a 135 shot any help would be very apriciated. Also if you know how shims work please let me know ------------------ 306 edelbrock heads bcam full mac exuast 1.7 rr 373 rear hd clutch tremec holley fp reg (it sucks) extune honed upper intake 75shot of juice

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11-06-2001, 05:31 PM	#2
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	The jets are 67-nos and 42-fuel. It's kind of hard for me to explain but I will try. The shim you need is a 42-thousandths and you can get it from an auto parts store, not a shim but a washer that will work just as well. The blue thing that has a vacuum hose that connects to your fuel pressure regulator; screw the bottom of that off and you will see a spring; put the washer at the bottom and put the spring back on. You will see what I am talking about when you unscrew it. The correct washer will just barley fit around the post that the spring sets on and there is a rubber ring around the post, push it over that, it will be a little tight. Then put it back together and your done. If you know anyone that has a micrometer you can use that to find the correct size. The only thing I would watch out for is the bottom of the regulator (the blue thing) has a bevel and I would make sure the washer you get fits flat on the bottom. ------------------ James Cox nochevy@hotmail.com 1991 Mustang LX