first off i have a 302 ho idk what year though. automatic. i want to first do a top end upgrade. i plan to buy AFR 225cc heads but idk what chamber size i should get 58cc or 72cc. and i want to replace my intake manifold but i have no idea what intake manifold i should buy. i was told weilders stealths are great but i want to weight my options and get other opinnions. Btw my maverick is my daily driver so i want to build it for street but i also want to be able to race on the interstate with no problem. my goal is to get 400hp or more after my build is complete. and i am hoping to get around 125hp just from doing a top end upgrade. i researched that the AFR heads give 75-100hp alone
the 225CC are WAY too big for your engine. Follow this guide: http://www.carcraft.com/techarticles/116_0307_ford_302_v8_engine_buildup/index.html Upgrade your cam while your at it...the HO is a good cam but why not upgrade it? http://www.summitracing.com/search/...duct-Line/Ford-Racing-Camshafts/?autoview=SKU http://www.trickflow.com/egnsearch.asp?N=400098+115+303789&autoview=sku as for the intake an edelbrock RPM will work nicely or the stealth.
That thing will be a pig with the 225's. Port volume is WAY too big for just about any 302. That motor just does not have enough lungs get the air moving through those big ports. You will be much happier with the 165's on a mild 302 (your wallet will be too). Don't forget that the 225's have a raised exhaust port so custom header will likely be in order.
you mean the dragstrip? right racing on the interstate is one of the stupidest things you could ever do..
that link sounds like exactly what i want to do. now i just need to see about the total cost of the build
Lets see, they say they can make 400 HP with a stock engine and stock roller cam. They put AFR 165s on it, headers, an intake and then to get it they have to add larger ratio rockers which they admit increases the duration and lift of the stock cam. OK, they made 405 HP but not without changing the valve timing with longer duration, higher lift and more overlap timing by using the high ratio rockers. The stock HP was reached at 4200 - the intake and carb took it to 5200 - the heads and headers took it to 6000 rpm - and the rockers took it to 6200 RPM. The torque went from 300 at 3000 rpm to 380 at 4300. I wish they had listed average torque and HP ratings with each change too. They did manage to get all the components matching at the end but over all they increased the rpm 2000 to get the peak power and torque was raised 1300 rpm and it makes me wonder how the changes affect the torque between 700 and 2000 rpm - where it is most needed on a street machine. How many people run their street engines to 6200 RPM? And for those that do - how often? The AFRs, a good set of headers and the Performer RPM is an excellent up-grade for your application and will produce torque and power where you need it. If you want roller rockers go with the stock ratio to keep your power in an rpm range that is useful to you.
