v8zed Posted October 3, 2002 Share Posted October 3, 2002 What to do with a rainout day? Why go to the dyno of course. We did two pulls for a baseline to work from. First pull was 306 horsepower at 5900 rpm with 285 pound feet from 2600 to 3900 then up to 300 pound feet to 5000. Touque curve is flat as a board. Second pull with 4 degrees more timing brought 310.6 horses at 6200 rpm and peak torque of from 4000 to 5300 rpm. A little less than I want but will come up a bit with further tuning. Till then 310 at the rear wheels and 2465 pounds of car will have to do. works out to 7.95 pounds per horsepower. This was with the engine specs in my "too much rpm for waterpump " post. Dennis Quote Link to comment Share on other sites More sharing options...
z ya Posted October 3, 2002 Share Posted October 3, 2002 Nice #'s ! Give us some engine specs. Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted October 3, 2002 Share Posted October 3, 2002 Sounds pretty healthy, yeah what are your build specs? Mike Quote Link to comment Share on other sites More sharing options...
v8zed Posted October 3, 2002 Author Share Posted October 3, 2002 Specs are, .030 overbore 2bolt block 74 vintage,forge crank from chevy truck std clevite 77 bearings,pink rods used and resized, hp618 .125 dome piston for 9.25 to 1 compression,world products SR Torquer heads with bowl work 2.02 & 1.60 valves,cam is 290 horse 1968 Z28 cam from a 302 , has .485 lift at valve and 254 degree duration at .050 inch set 4 degrees advanced., called a 30-30 as hot lash is .030 on all valves .carb is 750 Holley vacuume secondary on a victor jr. manifold , runs on regular unleaded with no ping at 41 degrees total ignition advance. Uses a petronix module in a stock HEI dist. Nothing fancy but looks like it wants more compression and more intake volume in the head. maybe some AFRs next year but it is fun for now and less than 1600 dollars in motor as I did assembly myself. Dennis Quote Link to comment Share on other sites More sharing options...
Guest JAMIE T Posted October 3, 2002 Share Posted October 3, 2002 Dennis, those are pretty good numbers. I'm wondering if you fixed your cooling problem? If you still think your pump is spinning too fast, you could get a CSI, or Mezeire electric waterpump. They both flow more than 35GPM(about the same as stock) and since they are not affected by RPM, then you wouldn't have the problem with too much rpm. BTW, my '94 Z28/6spd made 330hp, and 340lbs/ft of torque at the wheels. I use a CSI electric water pump on that car and my wife drives it daily. Quote Link to comment Share on other sites More sharing options...
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