Nikki jet sizes; which are bigger?
10-19-04, 05:34 PM
#3
Nikki-Modder Rex-Rodder
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Originally Posted by Rx7carl
Bigger number= bigger jet.
They are sized in mm.
160= 1.6mm = .062 inch
92= .92mm = .036 inch
They are sized in mm.
160= 1.6mm = .062 inch
92= .92mm = .036 inch
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10-20-04, 03:29 PM
#9
Sterling, the application is rejetting an Hitachi carb to work better on a street ported 13B. I have several old Nikkis sitting around and also have a few Hitachis, one of which a previous owner already swapped the primary jets out for Nikki jets. According you guys, 160 means secondary, so that's what was installed. It seems to run great and I have one other Hitachi from the same vintage that it totally stock inside and doesn't produce as much power on the same engine (while on primaries, which is 90% of my driving).
I don't pretend to know the black art of carb tuning so all I'm trying to accomplish at this point is to mimic what the PO of my other Hitachi did. The power improvement was very nice, and very cheap.
Yes, the jets are compatible between both carbs. What do you think about this idea?
I don't pretend to know the black art of carb tuning so all I'm trying to accomplish at this point is to mimic what the PO of my other Hitachi did. The power improvement was very nice, and very cheap.
Yes, the jets are compatible between both carbs. What do you think about this idea?
10-20-04, 04:14 PM
#10
Lorem ipsum dolor sit ame
I got 150s for primaries and 175s for secondaries (about to change them to 180s 
) on my streetported 12A, rest of mods in my sig.
Disclaimer: I don't know what I'm doing when it comes to carbs, so don't try to imitate me
) on my streetported 12A, rest of mods in my sig.Disclaimer: I don't know what I'm doing when it comes to carbs, so don't try to imitate me
10-21-04, 03:59 PM
#16
Airflow is my life
Originally Posted by cdrad51
Well, you can order them from Mazdatrix. I also happen to have a pair of 190s I'm not using. Will let them go for a mailing cost and a nominal amount.
10-22-04, 04:43 PM
#19
Nikki-Modder Rex-Rodder
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Originally Posted by cdrad51
Well, you can order them from Mazdatrix. I also happen to have a pair of 190s I'm not using. Will let them go for a mailing cost and a nominal amount.
After all yer whining about needing jets despite our recommendations?
These "problematic clients", I tell ya!
10-22-04, 04:46 PM
#20
Nikki-Modder Rex-Rodder
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Originally Posted by Jeff20B
Sterling, the application is rejetting an Hitachi carb to work better on a street ported 13B. I have several old Nikkis sitting around and also have a few Hitachis, one of which a previous owner already swapped the primary jets out for Nikki jets. According you guys, 160 means secondary, so that's what was installed. It seems to run great and I have one other Hitachi from the same vintage that it totally stock inside and doesn't produce as much power on the same engine (while on primaries, which is 90% of my driving).
I don't pretend to know the black art of carb tuning so all I'm trying to accomplish at this point is to mimic what the PO of my other Hitachi did. The power improvement was very nice, and very cheap.
Yes, the jets are compatible between both carbs. What do you think about this idea?
I don't pretend to know the black art of carb tuning so all I'm trying to accomplish at this point is to mimic what the PO of my other Hitachi did. The power improvement was very nice, and very cheap.
Yes, the jets are compatible between both carbs. What do you think about this idea?
Hell, just send the damn thing to Carl.
10-22-04, 05:03 PM
#21
Lorem ipsum dolor sit ame
Originally Posted by Sterling
After all yer whining about needing jets despite our recommendations?
These "problematic clients", I tell ya!
10-22-04, 09:54 PM
#22
I don't think Carl works on Hitachi carbs. The AP is different too.
160 primary and 190 secondary has a nice ring to it. I'll go ahead and let you guys know what jet sizes this Hitachi currently has in it and if I can *feel* any improvement on my MG Midget 13B project with larger jets.
160 primary and 190 secondary has a nice ring to it. I'll go ahead and let you guys know what jet sizes this Hitachi currently has in it and if I can *feel* any improvement on my MG Midget 13B project with larger jets.
10-23-04, 08:37 AM
#24
Nikki-Modder Rex-Rodder
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Originally Posted by cdrad51
Hahahaha, hey laugh all you want Dennis, but guess what, the sizes I ended up with were not toooo far from my original 160s and 190s. I have 150s and 180s on right now. Ok. couple of sizes off. Not too bad for a n00b!
And I told you o58s in front (primary), no?
You're running o59s.
Now you're running o74s in back. I still think that's too big.
Try this combo (just ****** try it.
)o59s in front like you have, w/ o23 air jets; and o64s in back w/ o46 air jets.
(...and the o64s in back are a comprimise. I still think even those are big.)