any1 use piston Part Number: UEM-KB278030

Posted By: blownzoom440

any1 use piston Part Number: UEM-KB278030 - 01/25/09 01:32 PM

in a 440 stock stroke.it is a quench dome with valve reliefs.it has a 2.050 CH,.200 dome.trying to pick a piston for Milan in the Q&A section for a max TQ motor on pump Gas.
Part Number: UEM-KB278030-8
Bore (in): 4.350 in.
Bore (mm): 110.490mm
Piston Style: Step head, with a trough
Piston Material: Hypereutectic aluminum
Compression Distance (in): 1.992 in.
Dome Height (in): 0.200 in.
Piston Head Volume (cc): -5.00cc
Wrist Pin Style: Press-fit or floating
Pin Diameter (in): 1.094 in.
Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in.
Quantity: Sold as a set of 8.
Notes: 0.200 inch quench dome height. Piston gram weight 775g, pin gram weight 190g.

Pistons, Hypereutectic, Step, 4.350 in. Bore, 5/64 in., 5/64 in., 3/16 in. Ring, Big Block Mopar, Set of 8
link to info at KB
http://kb-silvolite.com/performance.php?action=details&P_id=27

Posted By: Dave_S

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 07:34 PM

I use that piston, but 4.360". It's holding up well. That being said I think I'm on borrowed time and worry about it when I go through the traps at 7000!

Dave

Posted By: lewtot184

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 07:49 PM

if your going to use that piston with iron heads the dome will have to be machined. the kb184 will yeild the same compression without piston machining.

Posted By: blownzoom440

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 08:12 PM

i will have yo look at that 1 .will give quench also?
http://kb-silvolite.com/performance.php?action=details&P_id=26
that piston only has .140 dome and .075 in the hole and the other is .090 and .200 dome and maybe more V/P clearence.

Posted By: blownzoom440

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 08:37 PM

Quote:

I use that piston, but 4.360". It's holding up well. That being said I think I'm on borrowed time and worry about it when I go through the traps at 7000!

Dave

how much cam did you have and P/V clearence?

Posted By: lewtot184

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 09:05 PM

Quote:

i will have yo look at that 1 .will give quench also?
http://kb-silvolite.com/performance.php?action=details&P_id=26
that piston only has .140 dome and .075 in the hole and the other is .090 and .200 dome and maybe more V/P clearence.

the kb catalog states that the 278 will need the domes machined. i use 184's in both my 440's.

Posted By: blownzoom440

Re: any1 use piston Part Number: UEM-KB278030 - 01/25/09 09:31 PM

Quote:

Quote:

i will have yo look at that 1 .will give quench also?
http://kb-silvolite.com/performance.php?action=details&P_id=26
that piston only has .140 dome and .075 in the hole and the other is .090 and .200 dome and maybe more V/P clearence.

the kb catalog states that the 278 will need the domes machined. i use 184's in both my 440's.

thanks for the info!what was the quench distance to the chamber?

what head gasket?

Posted By: lewtot184

Re: any1 use piston Part Number: UEM-KB278030 - 01/26/09 01:48 AM

Quote:

Quote:

Quote:

i will have yo look at that 1 .will give quench also?
http://kb-silvolite.com/performance.php?action=details&P_id=26
that piston only has .140 dome and .075 in the hole and the other is .090 and .200 dome and maybe more V/P clearence.

the kb catalog states that the 278 will need the domes machined. i use 184's in both my 440's.

thanks for the info!what was the quench distance to the chamber? what head gasket?

sorry, i'm not sure if your asking about my 184 piston set-up or if kb gives a spec for 278's. all kb stated quench clearances are .040. thats the mean dimension i've used on both my 440s with iron heads. one engine has .017 steel shims and the other has fel-pro 8519's, .039 thick. the 278 and 184 piston are the same, pin heigth, valve reliefs, with the exception of the quench dome heigth. the 184 when installed at .040 quench clearance has loads of valve relief and about 9.3:1 compression. the 278 installed at .040 quench clearance without machineing the dome will have a compression ratio close to 8.75:1 and a little more piston to valve relief.

Posted By: Dave_S

Re: any1 use piston Part Number: UEM-KB278030 - 01/26/09 02:20 AM

the cam has .587 lift, duration is 268 @ .050 and I have in excess of .125" PV clearance.

Posted By: blownzoom440

Re: any1 use piston Part Number: UEM-KB278030 - 01/26/09 09:18 AM

thanks guys !that very helpfull information.