ok, I have a humble request, 1970 390 2v bone stock with manifolds.(electronic ignition added)
500 cfm 2v carb, stock cam. .430/.430-256/266, 1:73 rockers IVO 13BTC, IVC 63ABC, EVO63BBC, IVC23ATC. 36 degrees overlap.what does the DD say that makes? (ford said 265 in 1970)

I want to make some mods, intake, carb, and headers.

and then the same engine, and cam, but with edelbrock performer intake, hedman#89100 headers (13/4 tube) and either a 670 vac sec Holley, or a 700 dbl pmp Holley.

if anyone knows of a better dual-plane intake I'm game, I've had good luck with Edelbrocks stuff.

trying to figure out which intake and carb I want, the truck has a C-6 with 3.00 gears.

 

DD2k says 228hp @ 4000rpm, and 351ft-lbs @ 2000rpm. With the headers and carb you're up to 281hp @ 4500rpm, and 407ft-lbs @ 2000rpm.

 

cool thanks! I think I'll go ahead with the carb, intake and headers...

 

Rusty, do you have this crane cam on file...???
Powermax H-278-2
It has 222/234 duration @ .050, 114 degree lobe seperation, .548/.580 lift

 

You mean the 343801? Yes, I have it on file.

 

Not sure but those are the specs I got off of Crane's site last year (printed them). If you have it could you please run it and compare it to the 941...

 

Ok, here it is with the 343801 cam:

393hp @ 5000rpm, 438ft-lbs @ 4000rpm. It looks like you lose some low end torque too.

 

Kurt, what is you 390 built like? What trans. rearend ratio, longbed or shortbed? How is the idle. I want something noticable. I am trying to find a cam with the most lift for a given duration. I don't want to go much over 220 intake and 230 exhaust. I like the specs on the one lazer cam that I keep talking about but fear that the duration might just be a tad over what I want.

 

bump ok with my previously mentioned 390, 9.0 comp, assume the carb, intake and headers, with a 2wd auto and 3.00 gears, does anyone have a good cam recommendation? if I have to tear it down that far, I might want to toss a cam at it after all.

 

Annihilator:
I've got a C6 trans, 3.70 gears, longbed regular cab. My 390 is built as follows:
About 10 to 1 compression
Ported / polished C7AE-A heads, standard valves
TRW L2291F30 pistons
Crane 343941 cam
Stock type adjustable rocker setup
Crane lifters and springs, DSC pushrods
Holley 700cfm TBI fuel injection
Hedman Headers (or Hedders for those people at Hedman who cant spell)
Dual exhaust, cheapie turbo mufflers.

The exhaust is somewhat noticeable, but you have to be listening for it to notice it. When I had the vacuum advance plugged into the timed port it was really noticeable, had quite a bit of lope to it. I plugged it into full manifold vacuum and that really quieted it down, smoothed it out, and made it idle generally better.

Why the want for a bigger cam? You wont gain much if any HP unless you've got the head flow to support it, and you'll kill your low end torque. If you want something noticeable, duration will do it, not lift. The more lift for a particular duration just makes the cam perform better in its RPM range.

WHD:
If it's bone stock, then you haven't got 9:1 compression, its more like 8.3:1. Really the best thing for this motor would be the stock cam. You could use the 343971 for more low end, or the 343901 for more top end. The 971 will get great mileage. Both are very mild cams. What you really need to do to support more HP is get aftermarket pistons. The TRW forged pistons I mentioned in my build will get the job done very nicely. Then you could step up to somthing like the the 343941.

 

its bone stock for a 1970 Mercury Monterey

 

Ok, then never mind what I said before. I was thinking you had a truck motor. Your compression ratio is likely between 9.5 and 10 in that case. So I recommend the 343941.

 

Kurt, I know that duration gives you your idle characteristics, not lift. I am just experimenting with the different profiles from different cam companies. I am not second guessing your judgement on anything and I am very thankfull that you continue to help me out with this and take your own time to play with my setup on Desktop Dyno. Call me stupid but I was trying to convert specs on cams from .050 to seat-to-seat figures for the valve events and you know what, I couldn't get any of it to make sense and got frustrated. So I e-mailed Lazer and told them I wanted the valve events, if they don't send them then I probably won't do business with them. I just printed off Isky's line of cams for FE's (don't know if you have ran any of them on DD). Erson has a profile or 2 that I don't have the valve events for yet but I think one of them may be perfect for what I want (maybe not to, we will see I guess). I am going to have to set up another e-mail address, because for some reason you can't get in my account that the college provides. So untill I do that I can't get the valve events from Lazer, Isky, Erson, Engle. I know that the 941 is a good cam, I am just seeing if there is possible something that I will like better in my engine.
thanks,
JC

 

Do you think that the Crane 801 would be pretty decent compared to the 941? what are the numbers for both like through the whole powerband? (If you don't mind taking the time to somehow post that)

 

WHD,
The new Blue Thunder intake is supposed to be 20 hp more than the Edelbrock Performer RPM. I believe it is a dual plane. It costs around 60 to 70 $$$ more than the Perf. RPM (I think) Go to www.DSCmotorsport.com and that will probably give you a better idea of what you want.