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Old 08-19-2010, 01:54 PM
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Hey all..new here have a few Q's..

I bought a motor from a buddy..According to him these are the sepcs..

350 ZZ4
Gm Perf crank
Keith Black Hyper pistons
Comp Cam (big mother thumper I believe..cam specs 243/257 duration & 531/517 lift.
Edelbrock performer air gap intake
World products toruqer heads (angle plug if that makes a diff)


I have a pretty much new edelbrock 1406 carb to use.

I have already a TH350 w/a shift kit in it & 2500 stall. I want to put a 700R4 in it.

It's going in a s10, that is bagged & bodydropped. I drive this truck everywhere & want the best gas mileage possible. I have the posi gear to put in the stock 7.5 axle. The truck is show/daily driver, so HP & the like isn't too important. Just the sound & looks, but don't want it to fall on its face either.

What do ya'll think?

Here's the truck w/the 4.3 in it..for now.

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Old 08-19-2010, 06:42 PM
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For the sound, that thumper cam would sound awesome with headers, 2.5 inch duals and thrush welded chambered mufflers. For the best gas mileage use low ratio rear gears and keep rpm's low. I like the edelbrocks for mpg's because the are mechanical secondaries so you can put a spring n the secondaries so the extra resistance in the pedal will tell you when the secondaries are opening.
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Old 08-19-2010, 07:03 PM
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I think that is a great looking truck! I love the suicide doors too! The 700r4 would be your best bet for fuel economy I think, and maybe a different cam, but if you like that sound.. If you had an rv cam and a 700r4 I think that would be the best on fuel, maybe somebody else knows better than me tho. It is still going to sound great with flowmasters and dual exhaust for that cool sound... My two cents... cool truck tho!!
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Old 08-19-2010, 07:35 PM
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I would never put flowmasters on my car. Although they may sound good and the name makes seem good, they do not flow as well as most other performance mufflers. JMO
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Old 08-19-2010, 08:40 PM
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Ya can't have your cake and eat it too. First off, a 2500 rpm converter is pushing it with a Big Mutha Thumpr. Should be a 3000 stall. AND, you can't keep the RPMs down when ya have that cam. Your cruising speed at 55 or 60 should be about 2500 RPM or you won't be into the cam yet. If you're gonna use that cam better get a loose converter and a set of 4.56:1 Gears.
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Old 08-19-2010, 11:00 PM
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Thats kinda what I was thinking, lumpy idle = bad low rpm gas mileage right?
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Old 08-20-2010, 08:51 AM
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Thank you for the replies.so ya'll think I'd be better off getting the Thumper or mutha thumper instead?

I really hate to get like 8-10 MPG since I usually drive 300-500 miles to a show. Also my tank is only a 12 gallon..
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Old 08-20-2010, 10:28 AM
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To do what you're doing you'd be ahead of the game with the GM HOT cam kit. But it doesn't sound ragged.
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Old 08-20-2010, 11:43 AM
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Well I had the exact cam you wanting in my 350 and with the specs you gave that has to be the roller version and I had a 3500 stall convertor with a turbo 350 and 3:73 gears.

That cam is a wicked sounding cam and will perform but nothing like a comp xtreme energy or lunati voodoo series cams. I had so many problems with low rpm driving and the vacuum was horrible at only 6 inches in park and even my stall was not sufficient enough for that cam.

You will almost need a 3500-4000 stall for it to work cause that cam has a very tremendous amount of overlap and your distributor timing will have to be locked out etc. The thumpr cams are made for basic performance and sound.

I swapped out to a much smaller 231/239 @ 50 535/550 lift lunati voodoo hydraulic rolller cam and gained 7 inches of vacuum and man the torque and power increased by a large and noticeable amount and my stall works excellent with my voodoo cam.

I got only 6-7 mpg with that cam and a double pumper carb. After going to my voodoo cam and a proform vacuum secondary carb I gained some fuel mileage increase but not much. Any decked out 350 or similar will eat fuel.

If you want a thumpr cam then go with the smallest one cause even it has quite a bit of overlap.
Eric
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Old 08-20-2010, 01:41 PM
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If you want mpg's you need a small cam with short duration.
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Old 08-20-2010, 01:51 PM
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I think the reg thumper is the one I'm going to get..thanks for all the replies & suggestions.
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Old 10-01-2010, 08:42 AM
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Got The Cam & Gear Drive In..

Thanks for the the advice, I went w/the reg Thumpr & Comp Cams gear drive..





Just wanted to see what it looked like on the mock up block..




Header problem was driving me crazy..found a solution finally, the Advance Adapters Slick fit headers. But since they're angle pugs heads, I'll have to notch the header for one plug.



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Old 10-01-2010, 10:16 AM
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Looking good. Would conversion shorty headers not work w/ angled plugs?
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Old 10-01-2010, 10:27 AM
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Not w/the body drop. the problem is the body came down 3.25" so the shaft would not go thru the headers like they were meant to.

Even w/a double u-joint..these seem like they'll work great.
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Old 10-01-2010, 11:06 AM
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Good to hear you found a solution. With my ride, which is basically a bug body dropped 6" on a S10 chassis, I used the stock beetle column and I just had to angle the column up more so it would go through the headers. I had to make a custom column mount.
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