I'm getting ready to upgrade the motor in my 92 F350. It's a Ford Factory ReMan with about 8000 miles on it, but it's got a lifter tick. Compression is good (140+) on all cyls. It's getting Banks or Thorley headers, 3 1/2" single exhaust, a high volume oil pump, any needed valve work, possibly some porting on the exhaust side of the heads and a new cam and lifters. Looking to increase the towing ability, right now the truck does OK, but it really feels like a small block. Here are the cams I've found..

Crane
Crane Cams 353904 - Crane Truck Power Cam and Lifter Kits - summitracing.com

Lunati
Lunati 61600LK - Lunati Voodoo Cam and Lifter Kits - summitracing.com

and Comp Cam
COMP Cams 34-255-5 - COMP Cams Computer-Controlled Camshafts - summitracing.com

Lifters, springs, timing chain, etc will be matched to the cam. The Comp Cam is the only one that says it's for computer controlled motors but it also has the most duration of the three. Comp has 114 deg LSA, the other two have 112, but both of the others have less overall duration so overlap is probably less than the Comp Cam.

What do you guys think? Any other grinds that I should be looking at? And is there anything I'm overlooking here? Any other performance parts that I need to look at?

 

How about a custom grind? I like the Crane specs but with a 114 deg lobe seperation..

Anybody have any experience in this area??

 

There are 112 LSA cams that will work with the SD system, but I don't know if the Crane above would be one of them.. it does look like it would produce a broader powerabnd than the other 2 though. My gut feeling is the 250 intake duration the other cams provide will be needlessly restrictive on the big motor. Do you happen to know the stock cam specs?

Have you seen this thread...
https://www.ford-trucks.com/forums/2...t-upgrade.html

 

I've seen the thread linked, in fact I'm the last post. I've been searching with every term I can think of over the last week and I'm getting a lot of results, but not a lot direct experience with SD EFI. I have the stock lift specs at home, I'll post them later today, but no duration #s for the stock cam.

I talked to the Crane tech dept, the tech guy was positive the Crane would work great with the SD EFI, but they don't put it in writing.. Interesting thing about the Crane is that it's apparently ground with 6* of advance built in. Would that help low end? Mid range? If it didn't work "as ground" then would an older retarded timing set (4 deg retarded??) bring it back closer to strait up and help part of the powerband? I'm liking the Crane at this point just because it has the shortest intake duration, it seems like that should keep the EFI happiest..

Thanks for jumping in here, I really appreciate the voice of experience.

 

Any updates on this?? I just picked up a 93 with a SD460 as well.

My last 79 F350 had the Lunati 61601 cam , headwork, headers etc and I had it dyno'd on a chassis dyno.

260 rwhp and torque was 370. The operator said the torque could have been a little more because the dyno could not grab the truck untill over 2,000 rpm...

So i got a dyno sheet from 2500 rpm to 4500 rpm

I would like to add the same cam, but do not have time to start custom tuning an ECU right now if it does not take it and work.....

Lobe seperations have an effect on idle quality. 112 idles better than 108. I had a copy similar to the Voodoo done on 108 and it gave me a rougher idle. I would trade the better idle for a negligible amount of torque after doing this...

 

No updates yet. I'll probably be gathering parts for the next 2-3 weeks, then installing when I can get a clear weekend (I work 50-60 hours every week + a wife and 2 kids + I like to race the dirtbike...) so it could be 5-6 weeks before I get everything installed and tuned. I will definitly keep all threads I've posted in updated with the results though. I hate it when folks don't give closeout reports...

Oh yeah, I'm not going with the Comp. Even with the 114 LSA, its duration is long enough to worry me. So the Lunati or the Crane is what I'll be running, based on what I can find about the overall quality/longevity of the parts. I want this thing to last a long time..

 

I've flattened Two Comp Cams EFI cams so far.... The ultimate way to go is Roller cam/lifters... It is a bit more $$$$ but at least it will last.... I can't realy tell you what a difference it made 'cause with an extra 100ci and tunable EFI/Tanny controler, the huge crew cab dually is pretty much a handfull to drive...... My powerstroke feels like a turd now...

 

Did you use regular oil during the cam run-in?

http://www.cranecams.com/pdf/548e.pdf

Link above shows how to break-in a new cam and more importantly, what oil to use during the break-in. I talked to a Crane tech support guy, he said the break-in oil is totally the key to getting a flat tappet cam to live.

 

I used Comp cams lube and Rotela... The same thing I use to break my VW cams in with a lot more spring press.... I have talked to many motor builders that have the same problem.... The rockwell hardening of many new cam blanks/lifters seem to be too hard or too soft...

 

Do you have any input on who makes the best quality cam? I'm down to the Lunati or the Crane, if quality is equal I'm thinking Lunati but if the Crane has better made parts then I'll go with them.

Thanks for the info.

Oh yeah, what kind of engine/tranny controller are you using?

 

As far as cams go, Most manufactures make nice stuff... It just seems that once in a while you run into hardness problems.... I have just decided that I'd spend a little more $$$ and save myself the guessing and a lot of time by going roller... I am driv'n my Power Slug right now as my Fun truck sits waiting for a cam....

I'm running SDS EFI with a direct plug to factory wiring harness... It Datalogs with my LM1 and is a piece of cake to tune compared to the bells and wistle setup I have in my '67 turbo Bug.... I passes right through DEQ before I left Oregon after about a half an hour of tuning.... I couldn't believe it... Pretty impressive for a 557ci monster.....

The tranny controler is from Baumann Engineering.... It took quite a bit of wiring into the factory harness but realy wan't that bad.... It's nice to actual tow 15k stuffed race trailer with the converter locked in OD at 80mph on a tranny that was about done..... It was a short trip from So. Oregon to Central Louisiana so it could have been luck,,,,

I wouldn't suggest anyone that isn't totaly dedicated to tuning for max power/MPG to attemp this project.... I had a bit of a head start from tuning my 320 deg. cammed VW with 2X2 throttle boddies..... Talk about head spinns.....

OK....