Currently running stock '99 HP500's but I'm looking for more.Do I build what I have or do i sell while they're stock and buy different motors? So many different ways to go about it i just dont know what the most cost effective way would be. Find a pair of blowers drop compression and cam; raise compression and cam(na); buy carbed 575s/600s and build; buy professionaly built and dynoed non-merc motors? Surely someone has weighed the options. I don't plan on doing anything this winter due to the fact that this years budget is hanging off the back, but i'd like to have somewhat of a plan and a direction to head towards. Pump gas is an absolute must.

Thanks,
Riley

3 questions....

1 what drives do you have ???

2 How fast do you want to go ??

3 what is the budget ????

Big shaft #4s.id like to cruise 65-70.don't really care about wot.as far as budget it will depend power and platform.probably around 15-20k max.

whipples on those 500's

The absolute cheapest way to "cruise" 65 is to push the throttles til your running that speed and re-fresh more often.

With those drives you could bore/stroke to 540/555 and not worry about TQ. With about a 9/1 compression and good heads you should be around 650. Your straight bottom should top 80 WOT and stay within your budget.

Those "blue" merc motors are worth all the money. Sell them while there stock and worth more than a custom built dart block motor. Build a pair of 540's or 572's or look hard and find a nice pair that need to be freshened up.

I talked to Pier 57 today about repowering or trading up for more speed & if resale is a concern, was told stock merc power a + blue power ++ aftermarket - unless maybe Teague other big name but that would blow your budget. Randy

PROCHARGERS.... best bang for the buck.... my .02

you can easily make 750+ HP with your engines and prochcargers if you do it right.... my buddy has 509 with edelbrock heads and 525 cams, carbed with prochargers, pushes his 353 Formula to 107 MPH, never dynoed but its gotta be around 800 or so to push that baot to them speeds..I know you can make 700 with stock heads and such with em, even thatsnot bad, cost you a lot more to Build N/A engines to make 700+

The blower shop has a 10-71 complete kit specifically for the hp500.the guy i talked to said i can bolt them on and go? Bare minimum i would cam. But stock compression seems pretty high? Thoughts on this?

8.75 isnt too high for a low boost application. put 5lb's and innercoolers to them and you will have a great package.