as most know by now i have been looking at cams. i have been looking at towing cams since my 81 is my daily drivers and i put about 300km per week on it and it is fairly hilly around my area. i already have a Holley 570cfm carb and electric fans. when it gets a bit warmer i am thinking trying grinding and polishing some of the imperfections out of it so that it might flow better. i was also thinking about cutting open the stock y-pipe to help it breath a bit better. i already cut one up and discovered where it is a bit restrictive.
here is the kit i was looking at
and the cam that looks to almost have the same specs on summit
i thought $92 seems like a fair price for shipping since i live in Canada. i think if i tried buying all the parts locally it would all cost me more than $500. $8 per lifter, $80 for timing set, about $80 in gaskets plus whatever a cam and valve springs would set me back. stuff is not cheap here.

sometimes when i am out on the hi way i think may be near the high end of the stock operating range. i am not really sure since my exhaust is quiet but i would guess since the trans shifts into 3rd around 40mph and i cruise anywhere between 50-85mph that she may be screaming. i am also thinking about trying to get an overdrive transmission to try keeping the engine rpm down when running the hi ways.

 

years ago i put a COMP CAMS 268,i think it was a stock grind for the 340 in my 78 d150 318,EDELBROCK STREETMASTER intake(single plane) and a HOLLEY 650. it made a screamer out of that 318 + it was bored .030,and a 5 angle valve job.
i dont know about those summit cams,i personally would go with a major brand(their specs are more accurate) just my opinion. good luck

 

well i not thinking of ordering from summit. it was more so to compare the operating ranges to the one that comes in the kit i was looking at ordering from eBay. i think i might have also found a good deal on an edelbrock aluminum intake that is attached to a fairly complete 318 engine if it is still available.

 

im running a summit racing 6901 cam..i have no complaints here..only have around 1k-2000 miles

 

i doubt there is anything wrong with the summit cams. they are probably just as good as any other brand. i have read they are just are brand name stuff sold under the summit name.

 

Use http://www.grimmjeeper.com/gears.html to determine what RPM you are pulling at which speed. For an unscientific comparison, my truck shifts into 3rd at around 20-30 mph in normal driving. I probably have steeper gears than you, but I also have bigger tires. 65 mph is about the limit of where I like to cruise (just under 3k rpm). I have taken the truck on highway trips going around 80 mph (3500 rpm), and it didn't complain, and I think still got its normal 12 miles per gallon.

 

thanks for that. i think the operating range of the cam would almost be perfect for my truck if that website is correct with my guesses. i am guessing that i have 3.55 gears with 727 trans and this is what i got

i also played around with the calculator and think i might want to try getting a 46RH trans for my truck. it should drastically reduce the rpm range my truck would be at even at hi way speed.

 

If you do that you might find this site handy. It takes a while to download completely but it is very comprehensive.

http://www.scribd.com/doc/228727/Dod...Service-Manual

 

thanks SEAL. i think i downloaded that the first times you posted it on here. there is lots of good info in it.

 

You have to cut me slack. It is hell getting old. LOL
Here is something I know I haven't posted before. If you are looking for a 46RH the ones from 96 and newer have all of the mods for 46RHs.

92 Lockup introduced.
94 Larger oil pump and input shaft along with lubrication passages.
Mid 95 stronger one-way clutch with larger 1st/rev band.
96 Symetrical (square pattern) torque converter.