installed rv cam in my 87 toy truck....

[sc2dave]

I'll be driving my usual 400 mile trip on Tuesday. The place where i ordered my cam from,Deltacam.com Said that it would improve mpg somewhat. We'll find out By Tuesday night!

[Rokeby]

sc2dave,

Is this a side mirror delete?

Pictures would help.

[Mustang Dave]

No, it's a camshaft replacement.
A camshaft designed for peak torque at a lower RPM should help MPG a little. Let us know how it goes, sc2dave.

[sc2dave]

Well, here it is.Unless i had to degree it in, or mess with the valve lash or they sent me the wrong stick, i say no gain at all,i might have even dropped a mile or 2 per gallon!

[sc2dave]

Cam Analyzer v3.2 Test: 801-260 Folder: MY-TESTS Performance Trends (c) 2002 DELTA CAMSHAFT INC. 1-800-562-5500 DELTACAM.COM This Report Printed: 8:56 am 09-25-09 Page: 1
Cam #: 80 1-260 Operator: SCOTT
Report of: Cyl 1 , Cam CLine Dur Data Test Time: 12:21 pm 10/30/2007 Events Rated at .05" Tappet Lift Open Close Lb Area Lb Lift Vlv Lift RAR Lash LbSep/Adv Overlap
Int: 108.0 218.8 10.0 28.9 22.98 .285 .428 1.5 .006 108.4 16.7
Exh: 108.8 214.0 27.3 6 8 22.40 .286 .429 1.5 .008 .4 Advance
Lift Int Open Int Close Int Exh Open Exh Close Exh
BTDC ABDC Dur BBDC ATDC Dur
Cyl1
.003 66.9 72.2 319.1 78.6 60.7 319.3
.004 63.2 68.4 311.7 74.9 57.0 311.9
.006 56.2 61.4 297.6 68.0 49.1 297.1
.015 29.2 42.4 251.7 43.8 25.1 248.9
.020 23.9 38.8 242.7 38.5 20.5 238.9
.040 13.7 31.5 225.2 30.3 10.5 220.8
.050 10.0 28.9 218.8 27.3 6.7 214.0
.100 -6.7 16.8 190.1 13.6 -9.2 184.4
.150 -23.3 4.8 161.6 1.7 -25.9 155.8
.200 -42.2 -9.9 128.0 -10.6 -44.9 124.5
.250 -67.2 -30.5 82.3 -30.9 -69.2 79.9
.300
.350
.400
.450
.500
Test Setup
General Specs Int/Exh Specs
Type Measured with Electronics Intake Exhaust
Deg Steps: User Entered Rocker Arm Ratio 1.5 1.5
Lifter (profile) Type: Mild Solid Flat Actual Valve Lash, in .006 .008
For Cyl #: #1 Centerline, deg ATDC (mea'&MHD) 108.80
Degree Wheel Duration @ .050" (measurers. 84 na
Type: na Opening @ .050" (measured) 9.96 na
Closing @ .050" (measured) 28.88 na
Max Lobe Lift, in (measured). 2850 .2858
Gross Valve Lift, in (measured)
Designed Vlv Lash, in (measure^ na
Total Cam Advance (measured)

[comptiger5000]

I saw your posts about this over on Bobistheoilguy earlier. MPG gains with a cam seem to vary a bit, depending on gearing, displacement, engine load, etc. You also might need some tuning (altered timing curve, etc) to get the most from it.

Between the better flowing heads (with slightly thinner head gaskets for tighter quench, and about 0.3 bump in compression), better exhaust, and cam / roller rocker combo on the Jeep, I seem to have picked up about 1mpg on the highway, and think I can pull a bit more out of it as I work on the tuning. My city mpg is down about 0.5 mpg though, but part of that is due to engine / tranny tuning. I don't think I'll see any gains off the highway though.

I used to get between 17.3 - 17.5 mpg pretty consistently on the run between Rochester and home in good weather (saw 17.8 once on the same route). On the last 2 runs, I've seen 18.43 and 18.35 mpg, and those were with the cruise set at 62 (rather than my usual 60), and no drafting (I usually try to do a little distant drafting). Now I'm curious what it does for mpg with a trailer behind it, especially considering it has more power, and some tranny upgrades, I should be able to use OD (1750 rpm at 60mph) with a trailer on flat ground, and only have to drop it to 3rd on the hills, rather than running in 3rd (2600 rpm at 60 mph) all the time when towing.