Hoss7979
1/2 ton status
That's the cam I run, I'll run the numbers when I get to work in the morning w/ your setup. Those numbers I posted before for ya were stock valves & pocket port job. Compression was set @ 9.5:1 as well
CK5
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Big block guys
- Thread starter 85 Jimmy
- Start date
That's the cam I run, I'll run the numbers when I get to work in the morning w/ your setup. Those numbers I posted before for ya were stock valves & pocket port job. Compression was set @ 9.5:1 as well
Hoss7979
1/2 ton status
Stock converters don't help you what so ever if you have any kinda aftermarket stuff done. I run a 2800 in mine right now.
Ned Kelly
1/2 ton status
Yes, and both of us have stock torque converters. Good you are aware of things.:-)
Definitely talk to @Greg Ducato about the converter, you'd be better off getting one built for you instead of generic Summit type stuff.
Hoss7979
1/2 ton status
If you call any converter manufacture there gonna ask you your complete setup & then tell you what stall & size you need.
You also have to realize "stock converter"......stock converter in what? There's a difference between a stock converter in a car & K5. My new cam I'm putting in recommends a 3k but due to my setup Comp Cams recommends a 3500
Depending on the numbers, I may just run the smaller 268h cam and stick with the stock converter that is in the truck right now. I'm still not sure how the 700r4 will hold up behind the 454. I have a 4l80e that needs a rebuild, but that adds to the cost and I'm trying to keep it down.
One thing I haven't even looked into is a carb. For that I want something that's cheap, but will get the job done. I plan to put fuel injection on it as soon as I can.
One thing I haven't even looked into is a carb. For that I want something that's cheap, but will get the job done. I plan to put fuel injection on it as soon as I can.
For a compromise of wheeling vs economy, I'd hunt for a qjet. Look for folks selling complete motors and see if they'll separate it (and the accel cable bracket).
Do you have brackets?
Do you have brackets?
Hoss7979
1/2 ton status
268H.......a thought you wanted a BBC?!
I like this cam that Dave has but you'd have to ask him how it would be for interstate driving.
Also, I used Sean Murphy Induction to build my qjet. They're quite a bit cheaper than Jet.
Accessory brackets? I'm going to get the kwik performance adapters and run the TPI serpentine brackets and accessories I'm running now.
I'm sure this engine will put out around twice the hp and torque my 350 puts out right now with the baby 268h cam. But run the numbers with the 270, if it's more than just a little better I may run the 270.
I haven't driven my engine to any extent at highway speeds....mostly because I was having death wobble issues when first put together and run at Moab. We did drive it out to BFE (~15mi?) and the engine and drivetrain were fine, no surging, no flat spots, etc. I've driven it to work numerous times at 60-65mph but that is with the FAST on it now. But driveability is fine....my cam really isn't radical by any means, just a real nice torque curve and BBC's love a decent amount of lift anyways with the 781's!
here is a brief description of my head flow #'s and a Dyno 2000 synopsis of my engine:
So my head guy emailed me the flow numbers for the 781 Oval Ports....
intake exhaust
.100--86 73 @28"
.200--169 128
.300--237 194
.400--285 216
.500--318 227
.600--319 227
Never had heads flow benched before....anyone know how these numbers look?
I just went to the best guy I know, and let him handle it....
by entering those flow numbers in my Dyno 2000 program, with small tube headers &mufflers, 800cfm dual plane intake, 9.4 compression, cam +4 advance....I get a peak of 470 hp, and torque peak of 550 @ 3500. The torque is 525 @ 2000rpm, and still is above 530 @ 4500 rpm. NICE, this engine just keeps getting better.
I have that JET 800 Quad (36003) if your interested in it.... It worked great for me on the Maiden engine, then I let Adam try it on his 408, he couldn't get it to come off high idle or something....anyhow now it needs the top airhorn replaced (the acc. pump part of the casting is broken but I have one) and probably a rebuild as it has sat for 4 years now. $150 as is with a replacement top airhorn.
here is a brief description of my head flow #'s and a Dyno 2000 synopsis of my engine:
So my head guy emailed me the flow numbers for the 781 Oval Ports....
intake exhaust
.100--86 73 @28"
.200--169 128
.300--237 194
.400--285 216
.500--318 227
.600--319 227
Never had heads flow benched before....anyone know how these numbers look?
I just went to the best guy I know, and let him handle it....
by entering those flow numbers in my Dyno 2000 program, with small tube headers &mufflers, 800cfm dual plane intake, 9.4 compression, cam +4 advance....I get a peak of 470 hp, and torque peak of 550 @ 3500. The torque is 525 @ 2000rpm, and still is above 530 @ 4500 rpm. NICE, this engine just keeps getting better.
I have that JET 800 Quad (36003) if your interested in it.... It worked great for me on the Maiden engine, then I let Adam try it on his 408, he couldn't get it to come off high idle or something....anyhow now it needs the top airhorn replaced (the acc. pump part of the casting is broken but I have one) and probably a rebuild as it has sat for 4 years now. $150 as is with a replacement top airhorn.
Hoss7979
1/2 ton status
Hoss7979
1/2 ton status
If you wanted to go Mechanical Flat Tappet the 11-677-4 is a good call, it would require a 2500 stall converter but your looking @ 438HP @ 5K and 515TQ @ 3500
http://www.summitracing.com/parts/cca-sk11-677-4
Specs:
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=469&sb=2
http://www.summitracing.com/parts/cca-sk11-677-4
Specs:
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=469&sb=2
Imo, I wouldn't go with any mechanical type cam simply to avoid the periodic adjustment. Using one in a wheeler that sees a minimal miles per year would be no big deal but if it's a DD and/or seeing real travel time/mileage why go with something that requires more attention when you can achieve the same goal with a hydraulic set up. I didn't realize Dave's was a solid type cam but finding a similar hydraulic version should be easy.
Hoss7979
1/2 ton status
Hoss7979
1/2 ton status
With the pocket ported heads and the 2.19/1.88 valves w/ this cam your looking @ 490HP @ 5500 & 530TQ @ 4K.......
There's this one that's hydraulic, but the only thing that's the same between the 2 is the intake duration.
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=395&sb=2
That's 11 hp less and 1 tq more at the same rpm for tq and 500 rpm less for the hp. But it's a hydraulic cam
Hoss7979
1/2 ton status
There's a big difference between the 11-242-3 & 11-207-3 cams....... if that's the ones your comparing! 
when i pick my truck up friday.. ill be getting my new qjet that I just replaced off and into the for sale section it goes... hah... so def check the classifieds for carbs!!!
