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Blondeguy89 Mar 5th, 08, 9:22 PM Ok so im using the comp cams CamQuest software and its telling me peak 417hp and peak 426 tq. out of my 283, Is this accurate? It sure doesnt seem like it. I would love to take a screen shot to show you all my spec inputs but i dont know how. cuisinartvette Mar 5th, 08, 9:26 PM Theres a prt scr button, think you hit that and then go to MS paint, hit control V and it should show up. Someone correct me if Im wrong. Sounds like if you have all your airflow @s for the heads it may be more accurate. I tried the same program and it seems a little optimistic to me. Plus I cant unload the stupid thing off my computer, must have some "tentacles" that run pretty deep. :mad: Blondeguy89 Mar 5th, 08, 9:31 PM I have flow numbers of ported 305 heads that i plan on using. They are in there. Blondeguy89 Mar 5th, 08, 9:48 PM ok here it is http://i250.photobucket.com/albums/gg273/blakeneeser/CamQuest.jpg http://i250.photobucket.com/albums/gg273/blakeneeser/untitled.jpg kettbo Mar 5th, 08, 11:25 PM Blake, That cam you have in there is far too serious for a street 283...... I think the software is way off base as to the power output and where in the curve you peak. 417 horses Normally Aspirated on 283 cubic inch is 1.47horse/inch rather optimistic at best. Race 283, sure. Kid on a budget, I think not. 1.1:1 maybe 1.2:1 for something you can drive on the street. And a cam that healthy in a 283? That is a very big cam for even a street 350...JMHO but I think the peak power would be about 7000 rpm which is to say, the bottom end power would be in the toilet..not a fun cruiser, no manners.....but it would sound very mean! PDQ67 has more experience with these mini-mouses, he has posted 283 cam choices. If you go too big on a street 283, you'll have an ill-mannered dog on your hands. You would also have to get some clearance work done to the heads, retainer to seal interference. Blondeguy89 Mar 6th, 08, 5:38 PM WEll i fiddled with it some more and i am getting about 350hp and tq. Same cam i belive though. I dont think i want it to be a daily driver inbetween the time i set it up teh other 283 for turbo trmnatr Mar 6th, 08, 8:14 PM That cam is ok but i would suggest a tighter lobe seperation like a 108° lobe seperation for that engine Our 283 heads flowed 265cfm @.600" and peak power was @ 8,500rpm with our solid roller cam. First you have to set a real world goal for the 283 and then go about it. Its not just like slapping parts in a 355 | ||