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  1. rich weyand

    Cam found but...

    BTW, I have a request out to a guy on another forum who used (and loves) the 12-235-2 cam to see what springs he used, and if he needed to have any machining done. I'll let you know.
  2. rich weyand

    Cam found but...

    What you really want is a speed shop. Where you at in Iowa? Ton of them out there.
  3. rich weyand

    86 350 cam question

    The horsepower is up from 175 to 275, and comes on sooner, but the torque is the big thing. Big difference between 275 lbft and 425 lbft. I am running the BFG 31x10.5R15 with 3.73:1 gears and a G80 on a TH350, and if you punch it from a stop on clean, dry pavement -- no brake torquing -- it'll...
  4. rich weyand

    Cam found but...

    If you're taking it to a shop that knows what they are doing with older vehicles, they should already know if those heads need machining to accommodate the Comp Cams springs, particularly if they're a Comp Cams dealer.
  5. rich weyand

    Cams???

    That's what your profile on the left of your post says....
  6. rich weyand

    Cams???

    Gotta learn sometime. Early is better.
  7. rich weyand

    Cam found but...

    I was going to say the second, SK12-235-2. Buy the GM stock spring kit separately -- no head machining required. Now I see there is another note on the 12-235-2 page not to use stock springs. I used stock springs on my 12-300-4 cam, and that's fine, and have heard of others using stock...
  8. rich weyand

    Cam found but...

    From another thread, he's talking about running the 12-235-2 cam in his 305. That note about head machining only applies to the Comp Cams valve springs. I don't think you need to change the springs out from the stock GM valve springs with that cam, though I would probably put new stock springs...
  9. rich weyand

    86 350 cam question

    12-300-4 or 12-235-2. The Summit cams are old school, with 74* ramps. Ramp time is wasted time. You dump the pressure when the ramp starts, but don't get good flow until the ramp is done and the valve is open. The Comp Cams cited are modern grinds, with 44* ramps. That 30* means a lot. It...
  10. rich weyand

    Cams???

    Those aren't the right cams for your truck. Those are wind-em-up cams. No torque in the bottom. The torque peaks at 340 lbft at 4000 rpm, about 150 ftlb at 1000 rpm. Yeah, you get 320 hp, once you wind it up, but off the light it will be a slug. They'll sound bitchin' at idle, because they...
  11. rich weyand

    Cams???

    We need more info than that! What engine (yes, your profile says 305, but is this the truck you are talking about?), what mods were already done to it, carb or TBI, What other mods have already been done, what mods do you have planned...? And what are you trying to accomplish? Do you tow...
  12. rich weyand

    Does this diagnosis sound correct? low oil pressure blue smoke on start

    Sounds like two different problems. The oil smoke on startup is valve seals. The low oil pressure is probably either the sender to the gauge or the oil pump going south.
  13. rich weyand

    ENGINE SWAP -or- SELL! the final say for the most efficient square body motor!

    OK, let's say you switched engines and got 20 miles per gallon, which you won't. 100,000 miles would be (round numbers) 5000 gallons instead of 8000 gallons. At $2.50 per gallon, that's a difference of $7500 over 100,000 miles. You basically come out even, assuming you can get up to 20...
  14. rich weyand

    Which carb would you recommend

    A properly tuned Quadrajet would be my choice for your druthers. The trick is, properly tuned. As for which Quadrajet, I would talk to Sean Murphy at SMI, and get one from him specifically set up for your build. He will want to know the intake manifold, the exhaust, the displacement, the...
  15. rich weyand

    Edelbrock 1406 failed emissions

    Yup. You should have gotten the instructions with the carb: http://edelbrock.com/automotive/misc/tech-center/install/1000/1404_manual.pdf
  16. rich weyand

    Edelbrock 1406 failed emissions

    So 3.73:1 with 35" tires is equivalent to 3.09:1 with stock 29" tires, plus a 700R4 with overdrive? Yeah, that's about the mileage you should be getting. You're baffled because of a fundamental misunderstanding. Horsepower is not a function of how much gas you burn, but how much air you move...
  17. rich weyand

    Edelbrock 1406 failed emissions

    Yeah, that's what I'm running -- the 8" springs and the accel pump on the highest setting (i.e. richest setting, the hole closest to the pivot). What are you getting for mileage now?
  18. rich weyand

    Time for an Engine build

    Better start looking for a 12-bolt if you are going for those numbers.
  19. rich weyand

    Affordable engine replacement?

    Well, that's a 1969 307 in a 1983 C10, so "stock look" could go either way. I'd put an ACDelco HEI disti in it.
  20. rich weyand

    Time for an Engine build

    What rear end is in it?
  21. rich weyand

    Time for an Engine build

    Running an engine cold will make it run like crap. I replaced the stupid engine propeller with an electric fan because I couldn't get mine to run warm enough. With those numbers, you need to worry about the rest of the driveline. Easier to replace them from the get-go than piecemeal as you...
  22. rich weyand

    Time for an Engine build

    Pay attention to LTZ C20's build in this thread on another forum. http://forum.73-87chevytrucks.com/smforum/index.php?topic=28581.0
  23. rich weyand

    New build wont stay running

    A common error is to stab the distributor 180* out. Did you check to see which TDC you had when you put it in?
  24. rich weyand

    Good ignition system?

    ^^^ This.
  25. rich weyand

    Edelbrock 1406 failed emissions

    You can probably run the lockup off the ported vacuum. You might give that a try.

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