HOHN

Come one, come all Don M EDM users!! I would like to know what to expect from the various F1 EDMs in an otherwise (or kinda) stock engine.

Peak boost
EGT
Smoke
HP

Etc...

I think I remember Don posting about how his Mach 1.5s actually ran cleaner than his less powerful Mach 1s... is this true?

Which stage burns the cleanest per HP? How many holes are there in the injectors at different stages? I am not seeking proprietary stuff like injection angle, discharge curves, or hole size. Just number of holes.

PLease post your observations, praise, rants, gauge readings, etc here.

Also, please post your other mods if you don't have them in your sig.

TIA


Justin

Timinva

Justin,I think Don is always updating the injectors. My mach5s have 7 holes and are cleaner than my old mach4s, which had 8 holes. Egts run about 1500 at 65 psi of boost. Went from dd3s {460hp} to mach4s { 520hp} to mach5s {580hp}. Made some other changes but the injectors were most of it. Tim

GatorRam

I've got the 1.5's along with the things in my sig and I LOVE 'em. Much better than my old injectors. These things were just what I was looking for. Clean, awesome low end, and really smooth. I can make them smoke if I want but I drive on 3X5 most of the time without a problem. At WOT on 5X5 I make 48-49 psi of boost and If I stay in it from a stand still at 120 mph I'm just breaking into 1400-1425 egt. At 75 mph I'm at 675-725 degrees depending on conditions. Overall, I have not found one bad thing about this set of injectors. Hope this helps.

Adam

Idaho CTD

Peak Boost: 75psi
Peak EGT: 1500
Smoke: insane off boost but pretty clean @ 75psi
HP: 700
Number of holes: If I tell ya I'd have to kill ya
All the rest goes with me to the grave

gandrews

I've got Don M's EDM2's along with the other equipment listed below.

Previous to this I had a Banks Ottomind and RV275s and a stock turbo.

Now with the EDM2s and with the PM3 off it feels as if there is almost as much power as there was with the previous set up.
Overall the engine seems to run smoother with the PM3 and the EDM2s then it did before. Although at times there seems to be a slight lope at idle.

With the:
PM3 on -0- max psi = 34+ and about 600 to 750 @ 65mph
PM3 on 5 max psi = 40+ and about 750+ @ 65
PM3 on 9 max psi = 40+ 750+ to 950 @ 65mph

Can hit 1200+ if I'm in it - and towing up a grade with a load requires lower settings on the PM3 and a shift to 5th.

Very little smoke - can't see it unless I'm in it at level 9 and then just when I shift.

I like the current setup. Hopefully this "fix" will last for a while.

Good luck


George

HOHN

Thanks all who have posted.

I have heard that Mach 3s are good for 37-38psi of boost on an otherwise stock engine. If that's the case, then that's PERFECT for what I want in a streetable hi-po setup. Adding a PMAX for fuel should give me the extra fuel I want.

I want to make most of the power with injectors, and then use the box for part-time fun.

Looks like I don't need no stinkin in-between power levels-- the Mach 3s will be plenty.

What a sweet streetable towing setup it would be to have M3s, b1/b2 twins, and a PMAX comp.

If I go twins, I am gonna go pretty small (60psi max), so I can get lotsa spool up.

I would personally rather have 600hp of instant gratification that I can drive every day than have 800hp of track-use-onlu smoke belching monster.....

Justin

Idaho CTD

[QUOTE]Originally posted by HOHN

What a sweet streetable towing setup it would be to have M3s, b1/b2 twins, and a PMAX comp.

If I go twins, I am gonna go pretty small (60psi max), so I can get lotsa spool up.

I would personally rather have 600hp of instant gratification that I can drive every day than have 800hp of track-use-onlu smoke belching monster.....

Justin [/B][/QUOTE



I hate to burst your bubble but unless you go smaller than a B1 top charger you wont have "instant gratification". Fast spoolup just doesn't happen with a 40 or B1 top charger. You have to figure you'll lose 100-200rpms of spoolup when you go to twins over the top charger as a single (with the same fueling). On the other side if you go to a smaller top charger for quicker spoolup it will cost you some top end hp. Yet another downside to twins is the lag you experience until you get up near 15-20psi and the primary is providing boost. Another bummers is the Mach 3's wont get you to 600hp no matter what chargers you choose. There are several people running Mach 5's that are under 600 and a few that are over. Uncorrected I made 586hp with them. Corrected was 634hp. I would bet Mach 3's would put you about 550hp tops (uncorrected) with the chargers you listed.

Dont get me wrong, I'm not telling you not to do what you have in mind or to discourage you from twins (cuz there are fun 20-60+psi is insanely fast). Personally I would never go back to a single. Just be aware of the downsides to them as well.

HOHN

Nathan, I wasn't intending for all that stuff at the end to be connected together! My bad..

The twins setups I have been considering the most uses a Dodgezilla or a hx35 (or even a NAsty Nine) on top. Since I want the quicker spooling and not much peak boost, I was thinking that even a standard B1 might be useful as a primary.

Though small, I think that an HY35-9 and a B1 would be VERy fun and give you enough air for close to 500hp.


BTW-- it's impressive to me that a person can even get 500hp at all with such a streetable injector as the Mach 3s.
I would also do other air mods before jumping to twins. I personally feel that a cam and a P&P head are more cost-effective than twins at lower hp levels.

Justin

rharveysr

Mach 2.5's with a TST PowerMax 3 and a PDR HX35/14...Sweet ride.
Makes great power...heat peaks @ 1600, boost @ 46lbs..WOT

Normal everyday driving..on level 3 they work better than DDII's with less smoke and heat..

Rick

Idaho CTD

Justin,

I'm building up a set with a PDR35/12 and a HT3B/23 as soon as I finish my current projects. The feedback so far on this combo has been pretty impressive. Cruising boost is over 10psi and egt's are lower than a single. Response is nearly instant while under boost. Heavily fueled trucks can push it way too hard on the top end but down low it's impressive.

Personally the smallest top charger I would ever use is a stock 35/12 (with a 35/40 or PDR35 prefered). I would also try to use a 14cm2 housing if I could over a 12cm2. I wouldn't go any smaller than a HT3B for the primary either.

The P&P head and cam wont give you the ooooooh aaaaaaah factor twins does though.

Nathan

HOHN

I'll be happy to oooooh and aaaaaah over all the money that's left in my wallet.

LT

Idaho CTD

If you built your own you could build a 35/3B combo for less than what the P&P and cam cost

Timinva

I was thinking the same thing. Justin using your existing hx35 you could probably do it for about $1200. Tim

Forrest

Mach 3's on a 215 pump. Smokes less than the 300's ... but who cares. Makes lots of power.

The boost guage is much more responsive now too. It sure seems easier to blip the throttle from < 10psi to 40.

Racer57

Boost: 34 to 35psi (PDRHX3514W)
EGT: 1600 at the end of the 1/4 mile (perfectly controllable when not pedal to the metal and 5x5)
Smoke: not at much as my DD2's
HP: 482.2 at Piers Dynomania (with an automatic no less)


Normal driving habits: Drive with box totally off 99% of the time. Don't need it and truck has plenty of get up an go and less duty cycles on VP44. When I do turn it on, mostly use 1x1 and the difference of nite and day with regards to power.


I like my setup, can you tell? DonM's injectors rule!

Roger