Big Torque 383 Build - Car Craft Magazine

Dyno test 2 used the Camshaft Innovations mechanical flat-tappet cam with a steeper 1.7:1 rocker ratio and the suggested 0.016-inch lash. This stout rocker ratio accelerates the valve very quickly, which means it might float the valves sooner than a 1.6:1 ratio, but that extra lift definitely pumped the torque and horsepower all the way to 6,500 rpm.

Dyno test 2 used the Camshaft Innovations mechanical flat-tappet cam with a steeper 1.7:1

Westech's Steve Brul commented that with a few more tweaks, such as experimenting with lash and some lightweight synthetic race oil, we might be able to squeak 485 hp out of this combination. Of course, that's like dangling a carrot in front of a donkey, and now we're thinking about what it would take to push this budget Mouse up to 500 hp. But even at 475 hp for less than $4,750, it's hard to find fault with either the power or the price.

	TEST 1		TEST 2
RPM	TQ	HP	TQ	HP
2,500	375	179	345	164
2,700	374	192	348	179
2,900	381	210	356	197
3,100	398	235	375	221
3,300	417	262	398	250
3,500	434	289	416	277
3,700	445	313	435	306
3,900	451	335	447	332
4,100	458	357	458	357
4,300	460	377	464	380
4,500	461	395	467	400
4,700	459	410	466	417
4,900	452	421	464	433
5,100	443	430	461	448
5,300	434	438	454	458
5,500	419	439	445	466
5,700	403	437	434	471
5,900	389	437	423	475
6,100			410	477
6,300			396	475
6,500			383	474
Peak	461	439	467	477
Averages	425.2	345.8	426.4	350.7