370 injector gasket thickness?

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OK all you 370 injector Guru's, I have a question. What is the correct gasket thickness for the 370 injectors in a 215 engine? Thanks! #ad

 

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0. 5mm or 0. 02 inches dependind on whether you like metric or inches #ad


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Piers, BD engine R&D

 

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Thanks Piers!

 

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The instructions that I received from Joe Donnelly for the 370's said "Use the medium (0. 06" thick) washers with the new injectors". Was wondering if one of the guru's (Piers or Donnely) could explain the resulting effect of positioning the injector tip higher or lower in the combustion chamber by using washers of varying thickness?

Note: it's not my intention to determine who is right or wrong on this issue, I noted the discrepancy during my installation. I'm just interested in the theoretical aspects of how the position of the injector in the combustion chamber affects performance. TIA

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1997 2500 Ext Cab 4X4,5 spd,3. 54's,Pac brake,Rancho 9000's,Centerforce clutch,K&N airfilter,Missing
Cat,Isspro gauges,TST #11 plate (280hp/680tq),AFC medium spring and Jardine 4" exh.

 

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Joe also gave me instruction to use the smallest ones(. 02) on my 370 HP. How long ago did you get yours?

 

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Drawson, Got them on monday, I'm dying to get them installed!

 

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R. ebel, There might be different injector than the one I got. E-mail Joe he usually answers in the AM.

Next thing how your clutch? My Luk pro Gold wasn't up to the torque that the injectors and 16CM2 housing made. I've gone back to the #12 TST plate until spring and the Sach's clutch solves the slipping.

Good luck!!!!! You be have'n some fun #ad
#ad

 

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I, myself, have heard varying information on which gasket thickness to use as well. I originally installed the injectors with the 0. 02 gaskets a year or so ago and recently removed them due to a knocking sound, which was caused by 3 loose injectors. My reason for posting was that I wanted to make sure there haven't been any new approaches on gasket thickness since my original installation. I'm trying to understand why the injectors loosened up, and if it is relevant to gasket thickness.

Another question for those of you with the 370's: How much hazing are you getting at idle and under load (towing)? I have noticed quite a bit of haze at night while under load at cruise, more than I would like (covers booth lanes of the road). I'm not sure if the hazing is relevant to the loose injectors, but I would assume there would be some negative effect.

Other than this small inconvenience, the injectors have been an excellent addition to my truck's power. I am not really enjoying the truck as I once did... kind of boring now. I need to get the 370s back in.

[This message has been edited by DBR (edited 01-23-2001). ]

 

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You will find that the larger the holes in the nozzle tip, the more it smokes with little or no load. The reason for this, is that the fuel is not as finely shattered when forced through the holes. It moves slower, under less pressure, and the larger hole allows it to have a larger droplet size.

That's why I always suggested you use the 215HP nozzles unless you were going after really big HP numbers... the haze is non-existent until you really crank in the fuel, because it comes out of more smaller holes than the marine monsters #ad



Hey, I may hate environmental wackos... but I don't believe in polluting unnecessarily, either.

 

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I notice quite a bit of haze if I accelerate, especially up a hill or with a load. I get a big cloud of dark grey smoke if I accelerate hard from a stop or very low speed. One way to avoid having the smoke be so offensive is to run a big rig style stack exhaust. If you notice how much smoke some of the big rigs are putting out, it is at least as much as my Dodge. Only thing it is not offensive because it is being blown up high and not at ground level. I just got all the pieces to install a stack exhaust on my truck from NAPA. Hope to find time to install it within the next two weeks. Installing a stack on my truck will probably be easier than most because I have a flat bed. Just need to figure out the mount I am going to use, can't bolt it to the headboard because my truck is a dumpbed.

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1996 3500 Clubcab SLT, auto, 4. 10 limited-slip, TST #5, 370s, AFC spring kit, Psychotty, Dunrite converter, Trans-Go, Walker 21471, DiPricol EGT, boost & trans temp. gauges, 9 ft. aluminum flatbed and tool boxes with Venco dump. Custom front bumper, Hadley air horn, PowerVision mirrors.

 

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I have been recommending the 0. 02" washers based on Piers' recommendation. I am using the 0. 02" washers now. However, with 16. 5 deg timing, I feel the flame front may be hitting the piston pretty hard at 1500-1700 rpm and get some knocking cold. There is also more chance the spot hit on the piston is smaller than ideal with the thin washers. That is why I just suggested the 0. 06" washers, which is the thickness Bosch supplies with these injectors. I will be dyno testing both in a week or so. Hopefully that will give us some sort of answer.

 

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Joe,
Thanks for your input. I'll give the factory supplied washers a whirl. They measured a max. of 0. 0578" and min. of 0. 0572" (pretty tight tolerence on these little washers!).

 

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I'm glad I saw this thread. I have the 370's and . 020 washers ready to go in this spring.

Joe, let us know what you find #ad

 

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Power Wagon, I agree. I'm not too fond of the environmental wacko's myself, though they do serve a purpose in the overall picture of life.

I would rather not emit the haze that I do with the 370's... feel a little guilty at times. I have noticed on a co-worker's truck that the 275 nozzles in the 24 valve provide a nice increase in low-end power while not increasing the haze problem. I'm not sure if this is due to the electronic pump or nozzles. Other than the 300 marine nozzles, which I have, are there any other choices for injectors? If I remember correctly, the 300 nozzles hazed worse than the 370's. What options do I have?

 

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Does your trucks with the 370's or 300's smoke at idle with a very strong odor,and darken a parking lot on extreme cold starts from and overnite stay?

 

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Raman, I have set my pump,(afc, housing, plate) to obtain the least amount of smoke and still maintain good throttle response with the 370s. So at idle, the truck produces a light haze and moderate smoke under hard acceleration. The climate in which I live is rather mild and seldom gets below freezing, but on the days that it does the truck starts easily and produces white smoke and a bluish haze until warm. I will be installing the 300s for the fun of it, as I really don't remember how they performed. I do remember that they were a nice increase in low end compared to the 215s, but nothing like the 370's.

 

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Unless the engine is cold and the egt is low, I don't get any smoke with 370s. Beause of their fuel sac in the nozzle, the 300s and 370s do smell richer at idle, especially when the engine is cold.

 

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I've had so called 250 injectors in for quite some time byt had started to smoke at idle and have a stumble like feeling below 1800 say in forth or fifth gear and fuel mileage has fell off a some also so I put my old 215's back in and the truck runs much smoother with way less smoke but the bottom end sure is missing . I am thinking about the 370's but I don't like to smoke up the whole parking lot at the ford ktp every morning but do love to kick some powerjoke butt and some triton5. 4 too. Which injector is the best for those who have tried both?

 

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RECON BOMB REPORT:

Just got back from test drive with the 370's installed with the "medium" sealing washers.

See signauture for truck profile.
NOTE:#11 TST plate slid back from stock location . 032" (-22hp and -64tq estimated, with help from Joe Donnelly) to prevent possible slipping of Centerforce clutch. Injector pump timing still stock.

IDLE: seems smoother and less noisy.

EGT'S with stock 12cm housing:very managable... temps seem to jump up a little sooner but not bad, 16cm housing on its way for towing operations.

PRE BOOST POWER: definatly a nice healthy improvement.

MID RANGE POWER: Stout and very responsive.

BOOST: max boost was 31 psi, with the 370's now 36 psi.

SMOKE: pleasently surprised, after warm-up only a slight increase, was expecting more.

DRIVEABILITY: excellent

PERFORMANCE: Acceleration run up 1/4 mile long steep test hill with start/stop markers, from 40 mph... lifted early at 82 mph due to egt's #ad
Previous best was 77 mph at the upper marker without lifting.




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1997 2500 Ext Cab 4X4,5 spd,3. 54's,Pac brake,Rancho 9000's,Centerforce clutch,K&N airfilter,Missing
Cat,Isspro gauges,TST #11 plate (280hp/680tq),AFC medium spring and Jardine 4" exh.

[This message has been edited by R. ebel (edited 01-26-2001). ]

[This message has been edited by R. ebel (edited 01-27-2001). ]

 

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With a very rich AFC setting I can get smoke but where it is adjusted the only real smoke I get is when I rev over 2500 before that RPM therer just a puff preboost and then a small gray haze. The 370 HP realy turn my truck on. #ad
#ad
THEY SUDE ARE FUN aren't they #ad
#ad
#ad


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EAT'M UP
97 2500 Club 4X4 3. 54, Forrest Green/Driftwood, LSD 5 speed, & Psychotty Air System, TST #11, 370 HP injectors, timing at 16 deg. , 16CM2 housing, AFC spring kit, Geno's Exhaust Blanket, TST EGT gauge & 0-60 boost gauge in A Pillar, Cat-be-gone, 4" Dynomax Bullet muffler, Crome 4" turn down, Rad fan removed, AmsOil Through out, Geno's trans filter kit, AmsOil Bypass system, Lund Winter front, Leer Cab Level Shell Driftwood , 255/85R16, Dyno'd 342 HP pre injectors & turbo housing *NRA/USPSA member and proud of it*

[This message has been edited by drawson (edited 01-27-2001). ]