help wit RADIX 4.8 hp numpers please
Aug 11, 2004 | 11:38 PM
#11
13 Second Truck Club
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From: Pueblo de Nuestra Señora la Reina de los Ángeles de la Porciúncula
Originally Posted by LTNKLR01
ya i have a 4.8 with a radix. I made 435rwhp with 10lb of boost and went 12.6 @110 in the 1/4 with practically no 3rd gear. but one work a advice. Dont expect the pistons to last too long when pushin that kind of power. Then you have to go and build a forged short block for the stupid thing and throw some nos on it.
Aug 12, 2004 | 05:21 AM
#13
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Joined: Dec 2003
Posts: 572
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From: Western WA
i have an '03 rcsb 4wd with the 4.8 and the intercooled radix. pre-radix dyno (mods then were jba headers, flowmaster 70 exhaust, k/n air filter, and electric fans) got 240 rwhp and 250 torque. post radix was 314 rwhp and 320 torque, a bit on the low side, if you ask me. two possible factors for the low numbers: a very modest 3.7" pulley on the blower, and the fm70's are choking the system. i had problems with them at 4000+ rpms when n/a, and now with the blower, it has gotten worse. planning to go to magnaflows.
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