NX MAF kit, couple observations..
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From: Knoxville, TN
NX MAF kit, couple observations.. Put one of these on my car yesterday, I like the way the nozzles are machined into the housing, its a nice looking piece.
One thing is these MAF ends really drop the MAF readings, went from ~42lb/mn @ 6500 rpm with the descreened stocker to 35-36 with this. A/f went from 12.5:1 to 13.5:1 n/a (in car wideband) from the change so I'll have to fix the PE tables or up the MAF numbers some. If you dont do your own tuning might have to pick up a MAFT to keep things in line. I'm at 11.5:1 compression so its a pinging mess n/a at 13.5:1 air/fuel.
Stock 100 shot (52/31) jetting put me at a 11.5:1 a/f (still at over 13:1 a/f NA) so its jetted plenty rich. I'll see what it does at the track Friday but the converter is flashing ~500rpm higher then n/a (400rwhp SAE unlocked) so its working pretty well. If everything looks OK at the track I'll up it to the 150 shot and see how it does
Car ran 7.60's @ 93 last week with a crap 1.750 60's, converter is way too tight (only flashing to 35-3600) but the nitrous should fix that.
One thing is these MAF ends really drop the MAF readings, went from ~42lb/mn @ 6500 rpm with the descreened stocker to 35-36 with this. A/f went from 12.5:1 to 13.5:1 n/a (in car wideband) from the change so I'll have to fix the PE tables or up the MAF numbers some. If you dont do your own tuning might have to pick up a MAFT to keep things in line. I'm at 11.5:1 compression so its a pinging mess n/a at 13.5:1 air/fuel.
Stock 100 shot (52/31) jetting put me at a 11.5:1 a/f (still at over 13:1 a/f NA) so its jetted plenty rich. I'll see what it does at the track Friday but the converter is flashing ~500rpm higher then n/a (400rwhp SAE unlocked) so its working pretty well. If everything looks OK at the track I'll up it to the 150 shot and see how it does
Car ran 7.60's @ 93 last week with a crap 1.750 60's, converter is way too tight (only flashing to 35-3600) but the nitrous should fix that. Yes, the NX MAF ends are slightly larger than stock so it does alter that aspect of tuning. I simply used logs from stock ends compared to the NX MAF ends to figure a curve that I could apply to the MAF table. It's the best way really to compensate for the new ends so you also hit timing cells you are supposed to.
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From: CA
thanks for the info . . . can you PLEASE post your results. I am ripping my NXL kit off cause its a tuning nightmare (too rich or too lean) and going with the MAF kit or single nozzle kit.
Let us know your results.
Let us know your results.
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From: Knoxville, TN
Originally Posted by Nic00Z28M6
Yes, the NX MAF ends are slightly larger than stock so it does alter that aspect of tuning. I simply used logs from stock ends compared to the NX MAF ends to figure a curve that I could apply to the MAF table. It's the best way really to compensate for the new ends so you also hit timing cells you are supposed to.
I'll go to track friday, dont have time to hit the dyno. MeanWS6, like I posted before if you want to sell off the NXL nozzles/rails let me know. I'm really not planning on running over a 150 shot and I like the way the NXL looks
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From: La.
I also have this MAF kit and love it. Although, I do not have edit, but I did not see a change in the way the car performs. Your 100 shot jetting is wrong. It should be 52/28. The sheet provided with the kit is wrong. You might already be aware of this and are playing it safe, but just FYI.
Actually the older chart lists 31 as the fuel jet. I used to run my maf kit like this and gained 125 rwhp and 232 rwtq on a hundred shot. This was through a 12 bolt w/4.30s, 3.5 driveshaft, 18 x 10 v1s, and 315 tires.
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From: Knoxville, TN
I could tell by the a/f it was a little fat with the 31 fuel, I have a 28 and was going to try it after I got the N/A air/fuel a little closer. Its at ~ 11.5:1 with the 31 which is pretty safe but when I put the a/f back to 12.5:1 or so without the nitrous it will probably get a little too rich.
Nice thing about about having a wideband in the car
Nice thing about about having a wideband in the car
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More MAF kit dyno results MAF dyno results:
Wow, KP, your right on. The by swaping the MAF housing, car ran 13.5-14:1 without nitrous. Certainly leaned it out.
With the spray (52/33), The AF stayed between 11-11.5. Tried leaning it out slightly, but the car did not produce any bigger numbers on the dyno, so put it back to 52/33 (keeping it safe) The dyno number were good though... 90-100 hp gain throughout the RPM curve, at the wheels
. Plus it is a super-clean looking kit.
Wow, KP, your right on. The by swaping the MAF housing, car ran 13.5-14:1 without nitrous. Certainly leaned it out.
With the spray (52/33), The AF stayed between 11-11.5. Tried leaning it out slightly, but the car did not produce any bigger numbers on the dyno, so put it back to 52/33 (keeping it safe) The dyno number were good though... 90-100 hp gain throughout the RPM curve, at the wheels
. Plus it is a super-clean looking kit. Thread Starter
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From: Knoxville, TN
I scaled mt MAF up 7% and that put me right back where I was befoew with a stock descreened MAF.
I havent got around to dynoing it yet but I picked up 8mph in the 1/8 and .6 ET (93 n/a to 101mph). It wasnt hooking that well but by the MPH in the 1/8 it picked up over 100rwhp with the 52/31 at 10.9-11.3 a/f going down the track. I'm very happy with it, I know a regular nozzlw on the side of the coupler will work just as well but the MAF ends are a nice clean setup.
I had ET streets on the car and they just arent going to do it, it spun pretty bad for 3 passes so I gave up. I'll put the ET drags on it next time..
I havent got around to dynoing it yet but I picked up 8mph in the 1/8 and .6 ET (93 n/a to 101mph). It wasnt hooking that well but by the MPH in the 1/8 it picked up over 100rwhp with the 52/31 at 10.9-11.3 a/f going down the track. I'm very happy with it, I know a regular nozzlw on the side of the coupler will work just as well but the MAF ends are a nice clean setup.
I had ET streets on the car and they just arent going to do it, it spun pretty bad for 3 passes so I gave up. I'll put the ET drags on it next time..