#401 HP 390 FORD ENGINE CODES PRO#

The 289 can make amazing levels of horsepower despite its small displacement when prepared for Super Stock or Modified Production class Drag Racing but the downside is limited longevity mainly because of the extreme rpm levels involved. JeremyвЂ¦.it would be very difficult to give an accurate estimate of power levels based on the few details that you provided about your 289 build. ThatвЂ™s an increase of 92.04 cubic inches (1,508.19 cc) over the 351M - and it is, sort-of, a lot however, a 460 starts out 107.99 cubic inches (1,769.62 cc) larger than the 351M. In my opinion, 4.06 cubic inches that you get from the extra 0.020 past a 4.030 bore isnвЂ™t worth the price of your block (and whatever other damage is caused if your block fails).ДЇor what itвЂ™s worth, offers stroker kits their biggest вЂњoff-the-shelfвЂќ kit is 4.030 x 4.350, which is 443.89 cubic inches (7,274.12 cc). I think you run the risk of splitting one or more cylinders if you go to a 4.050 bore, but if you donвЂ™t, with a 4.000 stroke, you get 412.24 cubic inches (6,755.40 cc). HereвЂ™s the thing: if you donвЂ™t want the valves shrouded, youвЂ™re still going to need about a 4.080 bore, which puts you into either a sleeved block or an aftermarket block - and if youвЂ™re that far in, just jump up to the 460 and start modding from there.ДЇollowing the convention of вЂњbore x strokeвЂќ:ДЄ 4.000 x 4.000 is a factory combo that makes 402.12 cubic inches (6,589.63 cc).

#401 HP 390 FORD ENGINE CODES PRO#

You can buy вЂњClevelandвЂќ heads with better angles and ports these days, but if youвЂ™re not a pro racer, theyвЂ™re probably not worth it if you canвЂ™t use your original rockers, manifold and headers. In the early 1970s, NHRA Pro Stock allowed (tolerated?) repositioning of the valves, tubes where the exhaust ports used to be - lots of modifications normal people would consider insane. If youвЂ™re hoping to unshroud the valves, you need a bore around 4.155 with stock heads and you can get that down to around 4.120 if youвЂ™ve got some excellent head work. If youвЂ™re going past 0.030, have each bore sonic-checked. (B) The tall-deck Cleveland block is ginormous, but it is still a thinwall casting. If it needs a 0.030 on the first rebuild, itвЂ™s been deliberately abused for a very, very long time.

(A) Ford blocks are VERY hard when contrasted against blocks from other US makes, and usually will not need a bore job after 400,000 miles if they have been well-kept, but вЂњreasonably well-maintainedвЂќ blocks might need 0.010 after 250-500 thousand miles, depending. Second: 0.050 over is crazy in those blocks for a couple of reasons: You could buy FE blanks and have them machined with Cleveland crowns - but why not just buy Cleveland pistons and save yourself the headaches and cost? That pesky little item can be a PITA to find.ДЇirst off: the valve geometry of the FE head is completely different from that of the Cleveland, so the valve reliefs will be all wrong. Jeff is right about just swapping-out the crank and pistons however, you will also need the damper for the 400. Turn rod journals to 2.375' with RB Chrysler 6.768' rod.Turn rod journals to 2.200' with Big Chrysler 6.535' rod.No Mallory metal required for balancing.Requires aftermarket rods similar to 1.9L 4-cylinder rods.Ford Stroker Engine Bore and Stroke Guide

401 hp 390 ford engine codes