New Dyno! finally a/f's for dsm custom map

MSP #167

Member
Finally got back to the dyno after all the problems i had at the other place back a couple months ago. I went to a dyno day with a whole crew of fords, they were nice enough to let me get in on the discount, and i have now joined their club.

Mods are HIBoost FMIC w/hardpipes, Injen SRI, greddy type s(vented), apex 2.5 catless dp, DSM AFC running stock super map, Greddy Profec set at 10 PSI, colder plugs.

They didn't know s*** about my car and didn't know how to hook up the rpm meter, but they ended up figuring it out. The 250 tq is a mistake. I ended up making 200hp and 200tq on the 2nd run. I am pretty happy with it. Now i'm hoping dsm can make me a custom map and i can get a little better a/f ratio.

Here's the sheet, let me know what you think
 

Attachments

  • scan0001.webp
    scan0001.webp
    282.7 KB · Views: 580
Nice numbers. Where in nj did this take place? Also I bet the ford guys where kinda surprised by the numbers.
 
Thats the best a/f line I have ever seen on a MSP. Why do you want to change it?
 
nice stuff, I would leave it the way it is your not going to get much more by slightly altering those a/f s
 
thanks guys, yea it was so funny, they were so suprised, b4 i even pulled my car in they were making fun of my spoiler and trying go guess what i would put down. They were guessing like 150hp haha....it was so funny when they popped my hood, they were asking me all kinds of questions about my setup.

The best part was the look on their faces when they heard the turkey.

The turbo sounded so cool/loud in the garage. One thing i noticed is that the exhaust gets really loud higher in the rpm range and overpowers the turbo sound, and all i have is a dp.

Yea the a/f's are good, i was unsure if they needed to be changed at all.

The place is in Freehold, its called jdm....their site is TeamJDM.com.

They were really cool and i would def recommend them and will probably go back after more mods.
 
wow, great numbers. your a/f ratio is great! wish my N/A would run that ratio and i probably would gain some more power.
 
if anyone has a minute could someone explain A/F ratios as read on dynographs? i'm a performance savvy individual trust me, just haven't taken the time to learn about A/F curves (yeah i know what A/F ratio is but the graph just shows a number. is that like #:1 air:fuel or fuel:air or what?) also what units do they use to mearure air (fcm? psi?) fuel (lph? gph?)
 
one question i have....since i have good a/f's i don't have to worry about too much then right as far as my engine goes? Or can i still bend a rod with the power i am making? Because now i am looking into getting cams from srmotorsports and the pulley that is not underdriven i forgot who makes it. And of course i would go to the dyno after this but will i be making too much power for the rods even if i keep a good a/f ratio?

Thanks
 
sickspeed94 said:
if anyone has a minute could someone explain A/F ratios as read on dynographs? i'm a performance savvy individual trust me, just haven't taken the time to learn about A/F curves (yeah i know what A/F ratio is but the graph just shows a number. is that like #:1 air:fuel or fuel:air or what?) also what units do they use to mearure air (fcm? psi?) fuel (lph? gph?)

Yes, it's 12:1, 11:1, etc. His graph shows his AFRs between 11:1 and 12:1 for the most part.

His a/f ratios are very nice, although some will argue that they are on the lean side up top for these engines. Of course he has exhaust and an FMIC to keep the temps down, and the colder plugs help avoid pre-detonation. With 93 octane he should be golden.
 
MSP #167 said:
one question i have....since i have good a/f's i don't have to worry about too much then right as far as my engine goes? Or can i still bend a rod with the power i am making? Because now i am looking into getting cams from srmotorsports and the pulley that is not underdriven i forgot who makes it. And of course i would go to the dyno after this but will i be making too much power for the rods even if i keep a good a/f ratio?

Thanks

You should be safe with those numbers, but driving style can affect engine life dramatically. Probably one of the worst things to do is to let off the gas at high RPMs under full-throttle without pushing in the clutch. Deceleration with strain will usually snap a rod faster than acceleration. As long as you don't abuse it, the engine should be fine with those numbers.
 
now thats a beautiful a/f graph!!!! to be honest thats basically exactly what we prototyped these units to mimick...I wouldnt adjust a thing on that graph! I'm glad to see everything finally sorted out...I was having trouble sleeping after the first time you went!
 
I am running that setup now... I hope my AFRs look that good! I wish I had that uploaded during my dyno.... I had a bad map and leaned out causing misfire. This stock one should make things better, though I am too cheap to go back out and get it dynoed again.
 
Back