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[QUOTE]Originally posted by 93PONY: [QB] To make good power you need good quality parts....along with proper installation. 1.72 'Cobra' rockers are poor quality crane rockers. I've had a few of them fail when used with heavy valvesprings & aggressive camshafts. The E cam is not the best camshaft available that'll pass smog. A stock Cobra intake manifold is VERY restrictive. Fully porting the lower only gets you half way. Having the upper cut apart, fully ported, & shortening the runners is expensive (I'm working on one now & can post some pics). & in the end at best it'll be equivilent to an Edelbrock Performer. For N/A power, the Cobra is a poor choice. However, in the end you can still make good power with a Cobra intake if you choose your parts correctly & know the limitations of the Intake. Here's an example of a 'nicely done' 93 Cobra motor with AFR's: http://www.fordmuscle.com/archives/2003/06/afrinstall/ One thing to remember, HP = (TQ/5252)*RPM In other words, if your motor peaks before ~5900-6000rpm you will make more TQ than HP. If the motor peaks above 6000rpm you will make more HP than TQ. A Cobra intake manifold will make it extremely difficult to pull the RPM needed to make 320/320. & in order to make 320HP with a Cobra intake on a 302 you'd need roughly 360RWTQ. Haven't seen that done yet on a stock bottom end. The most I've seen is 340RWTQ....which will net you just over 300RWHP with the restrictive Cobra intake. Swapping to an RPM intake & larger camshaft will raise the RPM & you'd be exchanging low-end TQ for high RPM HP. Also note: There are no shorty headers that can 'swallow' the wide AFR exhaust port. Port-matching of the header flange will be neccessary. [/QB][/QUOTE]
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