Walked an Evo Vlll w/the s-10 283
02-15-2007, 03:21 PM
#41
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first off...the reason i built this 283 was because...when you enter "283 performance combo"(or something to that effect) into yahoo and search you will find nothing positive said about this motor ...for stupid ignorant reasons.
That said...i come from a family of chevy and its peformance ... big block chevelles dominate this town...im a 3rd gen. mechanic ...@ 19 years old....and yesss i own an ls1....look what these morons had to say
http://www.carcraft.com/techarticle...ll_block_chevy/
"no real reason to build one today" hahaa
...anyway....heres what i did...
283 bored .040
k&n 14x4 with X-stream lid
Crane blueprint cam of the L-79 327/350hp .447 lift [hydraulic lift,not roller]
Vortecs off a 98 5.0/305ci.heads are slightly ported&milled[no roller rockers]
Valve sizes are 1.89/1.50, the biggest a 283 left the fac. was 1.72 int. valve
Edelbrock Vortec Performer-RPM air-gap
650 Speed Demon
Hedman long tubes, into a custom 2.5in. x-pipe fed into 2.5 40series Flows
4 speed T-10, 3:42's; 26in mickey thompson Et Streets
this motor yields about a 10:1-10.25:1 comp. ratio
at the track launching the truck @ 3000-3300rpm range i knocked off 13.5's shifting @ about 7300rpm....this bad boy ran like a champ...not bad for a 4.6 chevy...lol modular ford 4.6s cant even put these number up ...and thats with overhead cams...RIDICULOUS!!!! this motor winds up like the little beast it is.... using a roller cam setup, a little more compression and possibly some aluminum heads...theres no doubt in my mind you can have a 8000rpm screamer. Doing the numbers i think my motor is makin about 315-335 hp, and about 300 lb/ft. of torque...id say thats pretty damn accurate.
That said...i come from a family of chevy and its peformance ... big block chevelles dominate this town...im a 3rd gen. mechanic ...@ 19 years old....and yesss i own an ls1....look what these morons had to say
http://www.carcraft.com/techarticle...ll_block_chevy/
"no real reason to build one today" hahaa
...anyway....heres what i did...
283 bored .040
k&n 14x4 with X-stream lid
Crane blueprint cam of the L-79 327/350hp .447 lift [hydraulic lift,not roller]
Vortecs off a 98 5.0/305ci.heads are slightly ported&milled[no roller rockers]
Valve sizes are 1.89/1.50, the biggest a 283 left the fac. was 1.72 int. valve
Edelbrock Vortec Performer-RPM air-gap
650 Speed Demon
Hedman long tubes, into a custom 2.5in. x-pipe fed into 2.5 40series Flows
4 speed T-10, 3:42's; 26in mickey thompson Et Streets
this motor yields about a 10:1-10.25:1 comp. ratio
at the track launching the truck @ 3000-3300rpm range i knocked off 13.5's shifting @ about 7300rpm....this bad boy ran like a champ...not bad for a 4.6 chevy...lol modular ford 4.6s cant even put these number up ...and thats with overhead cams...RIDICULOUS!!!! this motor winds up like the little beast it is.... using a roller cam setup, a little more compression and possibly some aluminum heads...theres no doubt in my mind you can have a 8000rpm screamer. Doing the numbers i think my motor is makin about 315-335 hp, and about 300 lb/ft. of torque...id say thats pretty damn accurate.
02-20-2007, 11:06 AM
#43
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Originally Posted by joewee350
Im still wondering how you got a tiny hydraulic flat tappet to make power at 7300 let alone be able to rev there with near stock vortec heads. 
its a small motor .... that cam was good to 6500+/- in a 327...thats what it came out of......as for the vortecs....my porter said it may of had even been 2 much head for the motor....perhaps....that may be why...it shines past 5grand....not to mention it has a 3.0 inch stroke!i!
