Quick question 305cc injectors + vortech 12:1 disk
#1
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Hi I was thinking of throwing in these 305cc injectors I have had sitting around for years. Would it be bad to run it with a vortech 12:1? Doesn't fuel pressure pretty much max out at 80 psi? Is it a better idea to drop down to a 6:1 disk? If so how boost from a greddy turbo is safe with those injectors?
EDIT: I know my sig says I have a begi afpr but I got it from andy floyd a long time ago. Who knows if it even works...
EDIT: I know my sig says I have a begi afpr but I got it from andy floyd a long time ago. Who knows if it even works...
#6
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With the 12:1 you will be rising rich and running rich until you reach a boost level that would be lean. At 8~9 psi you would probably still be very rich, since you can do 8psi with a 12:1 and 1.8 injectors.
I would put in the injectors, the 12:1 disc, take along a set of smaller discs and go to a dyno that will allow you to swap lower and lower until reaching a nice AFR at your peak boost level.
This is the long way of saying you would probably be very safe at 8~9 psi and the 12:1, but your cat might not and you won't be at maximum power.
I would put in the injectors, the 12:1 disc, take along a set of smaller discs and go to a dyno that will allow you to swap lower and lower until reaching a nice AFR at your peak boost level.
This is the long way of saying you would probably be very safe at 8~9 psi and the 12:1, but your cat might not and you won't be at maximum power.
#7
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
With the 12:1 you will be rising rich and running rich until you reach a boost level that would be lean. At 8~9 psi you would probably still be very rich, since you can do 8psi with a 12:1 and 1.8 injectors.
I would put in the injectors, the 12:1 disc, take along a set of smaller discs and go to a dyno that will allow you to swap lower and lower until reaching a nice AFR at your peak boost level.
This is the long way of saying you would probably be very safe at 8~9 psi and the 12:1, but your cat might not and you won't be at maximum power.
I would put in the injectors, the 12:1 disc, take along a set of smaller discs and go to a dyno that will allow you to swap lower and lower until reaching a nice AFR at your peak boost level.
This is the long way of saying you would probably be very safe at 8~9 psi and the 12:1, but your cat might not and you won't be at maximum power.
http://store.summitracing.com/partde...5&autoview=sku
This comes with all the disks?
EDIT: The cat's condition will not matter. I am going to run just a downpipe haha. I am going to the 1/4mi track with a few 400+ hp v8's and they will be far louder than my car on the ride over there. I just wanted to run more boost because its no fun to go all that way and run a 15.5....
#12
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OK thanks guys for the advice. I never really used the begi becuase when I got it, it looked really ghetto. I only payed 50 bucks. Here take a look at it.
http://img182.imageshack.us/img182/372/img0566qw1.jpg . As you can see the top bolt is larger. The top was retapped at some point. One of the nozzles on the side looks like it was jbwelded into place. You think its worth taking apart and getting a look at the insides?
EDIT: this thing looks nothing like the AFPR's on begi's website. Maybe its a real old one or a fake?
http://img182.imageshack.us/img182/372/img0566qw1.jpg . As you can see the top bolt is larger. The top was retapped at some point. One of the nozzles on the side looks like it was jbwelded into place. You think its worth taking apart and getting a look at the insides?
EDIT: this thing looks nothing like the AFPR's on begi's website. Maybe its a real old one or a fake?
Last edited by medisyn; 03-17-2008 at 12:19 AM.
#13
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Ok I took the thing apart here are the pictures.
http://img150.imageshack.us/img150/510/img0567bm9.jpg
http://img147.imageshack.us/img147/7318/img0568uc2.jpg
http://img167.imageshack.us/img167/7294/img0572og3.jpg
It seems to be in ok shape, maybe with some new diaphragms it would work fine? What else is needed to get it to work? A needle valve?
http://img150.imageshack.us/img150/510/img0567bm9.jpg
http://img147.imageshack.us/img147/7318/img0568uc2.jpg
http://img167.imageshack.us/img167/7294/img0572og3.jpg
It seems to be in ok shape, maybe with some new diaphragms it would work fine? What else is needed to get it to work? A needle valve?
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Ok I took the thing apart here are the pictures.
http://img150.imageshack.us/img150/510/img0567bm9.jpg
http://img147.imageshack.us/img147/7318/img0568uc2.jpg
http://img167.imageshack.us/img167/7294/img0572og3.jpg
It seems to be in ok shape, maybe with some new diaphragms it would work fine? What else is needed to get it to work? A needle valve?
http://img150.imageshack.us/img150/510/img0567bm9.jpg
http://img147.imageshack.us/img147/7318/img0568uc2.jpg
http://img167.imageshack.us/img167/7294/img0572og3.jpg
It seems to be in ok shape, maybe with some new diaphragms it would work fine? What else is needed to get it to work? A needle valve?
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