ROSS 2618 forged aluminum pistons

DSM Storm · Mar 12, 2002

Im using a set of these mounted on a set of crower connecting rods, the cylinder bores were machined .010 over from stock, pistons were build .0065 over leaving the required .0035 piston/wall gap that ROSS recommends, im also using their gapless rings with 4340 pins, I didnt experience any piston slap that others experience with JE or wiesco pistons, I let ross handle the ring groove locations, engine has 160miles on it so far, and all seems good.

Storm

Larse · Mar 12, 2002

did you compress the rings and install the pistons yourself???

DSM Storm · Mar 12, 2002

No, I had my machinist file fit the rings and install them.

Storm

davejcb · Mar 15, 2002

How much compression are you getting with gapless rings (when warmed up)?

BoostLE · Apr 8, 2002

any update on this pistons boss? i hope all is well...'cause i bought some too. I hope all is well.

DSM Storm · Apr 8, 2002

Car runs cherry, compression when cold is around 150psi for 8:1 compression pistons, my car has 780 miles on it so far, it runs fine, no piston slap or anything, car is damn fast too

Storm

ijsaul · Apr 9, 2002

Who did your order those piston through? What was the price on those bad boys? I'm in the market for a set tomorrow, thanks for the info. -Ian

DSM Storm · Apr 9, 2002

I ordered them directly through ross and gave them all the specs and designs that I wanted to be forged into the pistons, I think I paid around 800 for them.

Storm

ijsaul · Apr 11, 2002

Wowzers, you certainly have an awesome setup. I think I will stick with a standard set of ROSS's. I noticed on your site that you have clevite bearings, how much more were those compared to stock and would you happen to have the P#? I went back and forth on their site to no avail. Have you had her to the track at all? -Ian

lambertvr4 · Apr 11, 2002

Have you had a chance to yank the oil pan and see how the cynlinder walls look? I'm just curious. I know the JE's have been known to show signs of wear on the chambers (very slight). That really all depends on how "tight" or "loose" you setup the rings, pistons, bore. For a drag motor a little wear is fine w/ me as long as they seal up good.

Also, have you done a leak down test? That will really show more than a compression test.

I'm curious to here more!

later.

DSM Storm · Apr 11, 2002

ijsaul said:
Wowzers, you certainly have an awesome setup. I think I will stick with a standard set of ROSS's. I noticed on your site that you have clevite bearings, how much more were those compared to stock and would you happen to have the P#? I went back and forth on their site to no avail. Have you had her to the track at all? -Ian

As of now, the car is running like crap, im having a few issues with it and time is certainly not on my side, the car wont see the track until its issues are resolved, I estimate with time/money not being on my side, it might be a few weeks

although slowly but serely, the problems are going away

As for the bearings, I ordered them from an old DSM vendor called The DSM Shop, they got them for me, but im sure that if you were to have your engine built any machine shop that can rebuild automotive engines can and will be able to get you a set of clevite bearings, in a rebuild case, I recommend they do, because if the engine needs to be align bored or the crank needs to be shaved, then oversized bearings will need to be ordered. As for price wise, I paid $5- dollars less than the stock bearings according to the bearing prices on Buschur's web site, I feel they are a better bearing, although stock bearings are definatly not anything to shake a stick at either.

Storm :snowman:

DSM Storm · Apr 12, 2002

>>Have you had a chance to yank the oil pan and see how the cynlinder walls look? I'm just curious<<

No, I have not done so, unless there is a real need to do so, I will not be yanking the oil pan.

>>I know the JE's have been known to show signs of wear on the chambers (very slight).<<

You mean cylinder walls

>>That really all depends on how "tight" or "loose" you setup the rings, pistons, bore. For a drag motor a little wear is fine w/ me as long as they seal up good.<<

The problem with JE pistons is that they set them up loose, for our engines, they ask for a .005" piston/wall clearance, where as ROSS recommends a .0035 clearance, so as you can see, the ross pistons are alot tighter than the JE setup, if im correct, I think that JE also uses a different type of aluminum than ROSS so they might expand more, as of now, I do not have any slap with my pistons, if the problem ever arises, I will then yank the pan to see how bad the problem is, keep in mind that ross also offers a banadized coating, this coating is like a hard outer shell and is able to take the abuse of skirt slap.

I might do a leakdown test, as of now the car only has about 810 miles on the engine, it seems to go pretty damn quick but with the issues that have come up, the car needs a bit more attention, so when all is said and done, I will do a leakdown test on my spare time.

Storm

davejcb · Apr 12, 2002

DSM Storm said:
The problem with JE pistons is that they set them up loose, for our engines, they ask for a .005" piston/wall clearance, where as ROSS recommends a .0035 clearance, so as you can see, the ross pistons are alot tighter than the JE setup, if im correct, I think that JE also uses a different type of aluminum than ROSS so they might expand more, as of now, I do not have any slap with my pistons, if the problem ever arises, I will then yank the pan to see how bad the problem is, keep in mind that ross also offers a banadized coating, this coating is like a hard outer shell and is able to take the abuse of skirt slap.

What it is is silicon content... The less you have, the more the piston expands, and the JE's have almost none. So you need to run looser clearances, which causes piston slap.

ROSS 2618 forged aluminum pistons

DSM Storm

Larse

DSM Storm

davejcb

BoostLE

DSM Storm

ijsaul

DSM Storm

ijsaul

lambertvr4

DSM Storm

DSM Storm

davejcb

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