looking for information on d-jet 2056 conversion, calling all M.P.S. guys * need info.** |
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looking for information on d-jet 2056 conversion, calling all M.P.S. guys * need info.** |
orange914 |
Jan 17 2008, 08:31 PM
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#1
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
i am setting up my d-jet to operate the new 2056, it origanally was 1.7. i need some experianced input on running either a "modified perameter" 1.7 or 2.0 m.p.s. which of these 2 combo.s would work the best?:
1) a modified 1.7 (max. re-calibrated setting for 2.0) with increased fuel press. (note) higher fuel pressure increases atomazation so this combo may have benifit over #2? PROS: i could re-calibrate/use my good 1.7 M.P.S., CONS: have to adjust a/f with increased fuel press. at regulator and set on a/f scope 2) a modified 2.0 (able to set to 2056 fuel requirements) PROS:? keep stock fuel pressure CONS: have to locate/buy or trade a good 2.0 m.p.s. for re-calibrate answers to the below questions will be helpful in desiding how to go i'm trying to understand if the m.p.s. operation, does it have a profound (dont know if thats exactly the word i'm looking for) effect on the e.c.m.'s output for the full range of f.i. operation? would programing a 1.7 to 2.0 a/f settings + raised fuel injection press. do the same (or better?) than a reprogrammed 2.0 m.p.s. set to 2056 a/f calibration? when you re-program the m.p.s. what data exactly does it input to the computor? manifold pressure and?? is it very basic data or does it relay more complex values and ranges? if i go route #2 DOES ANYONE HAVE A 2.0 M.P.S. 4 SALE OR PARTS SWAP? thanks, mike EDIT NOTE: new info. from p.m. so it's basic duty is the same as a modern map sensor. if i adjusted fuel pressure higher it could find the balance a/f ratio by 1) increased pulse width (max. setting,) plus- 2) incress fuel pressure to fine tune a/f ratio across the board since m.p.s. is handling the three parameters. |
Bleyseng |
Jan 17 2008, 10:14 PM
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#2
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Using a 73 1.7/2.0 ECU causes some problems tuning but I can do it IF I have the proper MPS with enough range to "tune" with. I actually like early 1.7 ones with a late style cover. These have the most range so I can get the AFR right from idle to WOT. Most MPS's can't get enough richness at WOT if you are running a 2056 w/a RAby 9550cam.
Look at the MPS pic in my Blog to see the cover insides.... The best MPS for a 2056 Raby Cam engine with a 73 ECU is of course the 037. Lots of range to tune with.... I have tested the idea of tuning with the FPR and you can tune it about .5 of richness meaning if you AFR is 14 to 1 you can tune to 13.5 to 1 upping the pressure to 36psi. You must use a LM meter to tune or you are wasting your time...especially on the MPS as very small turns of the inner screw can result in changes of 1 point. If you have a good diaphram I can make a MPS for a 2056. I just have very few good diaphrams left and I don't use those rebuilts available now. |
orange914 |
Jan 17 2008, 11:32 PM
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#3
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
I actually like early 1.7 ones with a late style cover. Look at the MPS pic in my Blog to see the cover insides.... The best MPS for a 2056 Raby Cam engine with a 73 ECU is of course the 037. I have tested the idea of tuning with the FPR and you can tune it about .5 of richness You must use a LM meter to tune or you are wasting your time... i have the 73 ecu, i also have a 72 1.7 ecu in unknown condition (probably is useless here anyway). yes 2056/ raby 9550 cam. do you know of a 037 m.p.s. for sale or trade? i have a 72 m.p.s. also i'll research your blog, do you mean you use late 2.0 style covers with early? if it doesnt quit make 13.5:1, whats the worst you've experianced getting a 1.7 m.p.s. a/f ratio up to? (i.e. 15:1, 16:1?) have you experimented with higher f.p.? any benifit from better atomazation? thanks for all the info., mike |
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