Funny, I'd have thought this had been discussed. Maybe I stink at searching.
Anyway... here's the deal. I have a FJ46 (extra-cab, flat bed, SOA, NV4500, Orion, 4.11's, 35's, probably weighs 4800lbs) with a stock GM Goodwrench 350. Running a Performer intake with Quadrajunk on top. The truck crawls just fine (NV4500->Orion), but getting up the hills on the freeway is embarrassing.
Someday, I plan to swap a diesel, but in the meantime... I want to get some more horsies out of this engine. From what I understand, the stock cam in this motor is pathetic. I starting looking at new cams. I know _what_ the cam does... but I only know enough about cams' numbers to confuse myself.
So, I'm looking for advice on cams. I want the most power, best economy, smooth idle that I can get... that's not asking much, right?
I started by talking to Jegs and Summit. They didn't give me much info. I then called the manufacturers. I've heard good things about Crane... but they are in the process of being bankrupt, sold, and reopening. So, I called Lunati and Comp.
So... here are some comparisons. First, is what I _think_ my stock cam is. Second is the suggestion I got from calling Lunati cams. Next was suggestion from Comp. Last is a run-of-the mill from Edelbrock.
GM Goodwrench
* Advertised Duration (Int/Exh): 260/268
* Duration @ .050 (Int/Exh): 194/202
* Gross Valve Lift (Int/Exh): .383/.401
* LSA/ICL: 112
Lunati
* part #: 60-1000
* Advertised Duration (Int/Exh): 250/256
* Duration @ .050 (Int/Exh): 207/213
* Gross Valve Lift (Int/Exh): .437/.454
* LSA/ICL: 112/108
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: idle-5000
* Includes: Cam Only
Comp Cams
* Part#: 12-231-2
* "extreme 4x4 cam"
* duration (@.050) 206/214
* lift .432/.453
* lobe separation: 111
* RPM range Idle to 4600 RPM
Edelbrock
* Operating RPM Range Idle-5,500
* Duration at 050 inch Lift 204 int./214 exh.
* Advertised Duration 278 int./288 exh.
* Valve Lift with Factory Rocker Arm Ratio 0.420 int./0.442 exh. lift
* Lobe Separation (degrees) 112
From what I can tell... these are fairly mild cams? Maybe a bit more aggressive then an old school "RV Cam", but certainly not enough to create a loping idle that would suck in crawling situations.
OK... so... suggestions, comments, ideas, past problems, past projects that turned out well? Let'm rip...
Anyway... here's the deal. I have a FJ46 (extra-cab, flat bed, SOA, NV4500, Orion, 4.11's, 35's, probably weighs 4800lbs) with a stock GM Goodwrench 350. Running a Performer intake with Quadrajunk on top. The truck crawls just fine (NV4500->Orion), but getting up the hills on the freeway is embarrassing.
Someday, I plan to swap a diesel, but in the meantime... I want to get some more horsies out of this engine. From what I understand, the stock cam in this motor is pathetic. I starting looking at new cams. I know _what_ the cam does... but I only know enough about cams' numbers to confuse myself.
So, I'm looking for advice on cams. I want the most power, best economy, smooth idle that I can get... that's not asking much, right?
I started by talking to Jegs and Summit. They didn't give me much info. I then called the manufacturers. I've heard good things about Crane... but they are in the process of being bankrupt, sold, and reopening. So, I called Lunati and Comp.
So... here are some comparisons. First, is what I _think_ my stock cam is. Second is the suggestion I got from calling Lunati cams. Next was suggestion from Comp. Last is a run-of-the mill from Edelbrock.
GM Goodwrench
* Advertised Duration (Int/Exh): 260/268
* Duration @ .050 (Int/Exh): 194/202
* Gross Valve Lift (Int/Exh): .383/.401
* LSA/ICL: 112
Lunati
* part #: 60-1000
* Advertised Duration (Int/Exh): 250/256
* Duration @ .050 (Int/Exh): 207/213
* Gross Valve Lift (Int/Exh): .437/.454
* LSA/ICL: 112/108
* Valve Lash (Int/Exh): Hyd/Hyd
* RPM Range: idle-5000
* Includes: Cam Only
Comp Cams
* Part#: 12-231-2
* "extreme 4x4 cam"
* duration (@.050) 206/214
* lift .432/.453
* lobe separation: 111
* RPM range Idle to 4600 RPM
Edelbrock
* Operating RPM Range Idle-5,500
* Duration at 050 inch Lift 204 int./214 exh.
* Advertised Duration 278 int./288 exh.
* Valve Lift with Factory Rocker Arm Ratio 0.420 int./0.442 exh. lift
* Lobe Separation (degrees) 112
From what I can tell... these are fairly mild cams? Maybe a bit more aggressive then an old school "RV Cam", but certainly not enough to create a loping idle that would suck in crawling situations.
OK... so... suggestions, comments, ideas, past problems, past projects that turned out well? Let'm rip...