Hi ive tryed to do the math but it didnt work out some please bear with me . Im trying to see if i can get Flat Top pistons with 11:1 Compression and HO Cams to fit properly will there be any clearance issues ? or what is the difference in performance with pistons with Valve Seats and Flat top ? im just trying to get good performance . thanks ...
with my guess it is, i havent heard of any clearance issues, if there is any clearance issues you local machine shop can mill the piston so the vlaves wont hit
fully built 2200-TO4E T3/T4-HP tuners-373hp @18psi
if the machine shop messes with the piston would that screw around with the compression ?
yeah it would. That's bad info from KavyKid. It would not only lower the compression but it can create weak spots and sharp edge that promote pre-ignition.
When you order your pistons, you order them with valve relief. The company you order them from will make the groove on the pistons. That's why you have to fill a big order sheet.
Stock compression with the 2.4 is 9.5:1 and 9.7:1 with flat top pistons. So to go with 11:1, you'll need a dome top with valve relief.
You'll need a dome of 7.5CC including valve relief to get 11:1 compression at 0.030 over.
Gilles
2.3 Ho
Ok Great .. thanks. do you know the equations to getting those numbers ? i want to learn how to figure out stuff like this for myself, or is there a website ? To my understanding so far 11:1 Flat top= a dome of 7.5CC including valve relief to get 11:1 compression at 0.030 over. same performance right ? thanks again
you can check www.rosspistons.com for the calculation. It's easier than doing it by hand.
You can't get 11:1 with a flat top piston in a 2.4. Flat and dome pistons can react differently.
Also, a flat top may be a bit better on horsepower since there's no added weight from the dome.
Gilles
2.3 Ho
