What is DPI? I've heard of it several times, normally when refering to higher HP engines? What are the benefits and drawbacks? Expense, availability yadda yadda yadda?

 

DFI is digital fuel injection made by accel lets you control all engine functions with on the fly modifications it is quite expensive i just priced one it was $1246 for the no frills one.aftter considering thhe options i'm going with burning my own chips from whhat i know there is a lot of functions you can alter in the stock ecm the only drawback is changing the proms after burning

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch,tb bypass,accel supercoil,cap& rotor,hollowed maf,slp 3in. catback,a/c delete.

shooting for 13's!!!!!!!

14.10@97mph w/2.01 60'(auto ET)

slp catback is finally on!!!
fastchip prom is in.
kicks you in the *** at wot.
FLOWMASTER S.U.C.K.S

 

are you sure dpi? or dfi?
i have never heard of dpi (i been out of the loop for awhile) but dfi is digital fuel injection. i have an accel dfi unit and what it is ...a completely adjustable computer/harness. you can...change injector pulse length (on top model) watch all diagnostics (via laptop, which is also what is used to make fuel curve adjustments , etc etc.)
i used it for the adjustability it has.

http://people.ne.mediaone.net/gdm

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87 z28 bowtie aluminum 420small block dry sump crower lt. wt. knife edged crank oliver lt wt rods brodix track 1's super ram intake slp 1 3/4 headers accel dfi art carr 700 r4 3.42 gears ssm sub frame/ladder bars.....other parts on the way ,soon to be finished!! couple more weeks!!!

 

Yes...I meant DFI not DPI. See, I really didn't know! Thanks. Can I still use my TPI setup...mechanically I mean. I would imagine so right? At what point does it become really worth the money...performance wise I mean?...Not planning on gettin' one...I just like to learn about what's out there.!!!!

 

Whew! For a minute there I though the Department of Public Instruction (Wisconsin) had started diversifying into aftermarket fuel systems. Freakin' taxes are high enough as it is...

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Later,
Vader
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"Let the bodies hit the floor!"
Adobe Acrobat Reader

 

i would say dfi is not needed on anything smaller than a 383. but i guess an extreme 350 could utilize dfi too. a friend has it on his. actually thinking about it...any size seriously built motor could use it effectively


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87 z28 bowtie aluminum 420small block dry sump crower lt. wt. knife edged crank oliver lt wt rods brodix track 1's super ram intake slp 1 3/4 headers accel dfi art carr 700 r4 3.42 gears ssm sub frame/ladder bars.....other parts on the way ,soon to be finished!! couple more weeks!!!