So the main design up top is almost the same on the Probe pistons compared to the other based on what you've seen, or are you only talking about the forged pistons out there already?
PROBE FORGED PISTON SOLID MODELS AND SPECS! LOOK!
- Thread starter Doward
- Start date
The Probe design has the laid back sections that will affect quench and swirl in the CC but most of the others use much the same dish as the stock pistons just with different volume to change the static CR.
I'll be interested to see a set of the probes pulled down after 4>5K miles to see the Combustion patterns on the crowns. (that or a motor bore scoped)
I'll be interested to see a set of the probes pulled down after 4>5K miles to see the Combustion patterns on the crowns. (that or a motor bore scoped)
Looking back on the weight, they are projecting it to be very light. Wouldn't that mean they would be the lighest set out there? I wonder how they are getting it to be that light...
What's the skirt length going to be????
What's the skirt length going to be????
The skirt length is damn near stock, from those pics 
Ian - way ahead of you I plan on doing exactly that, about 5-6k miles into my rebuild, to ensure everything is good - Have these gotten your interest?
They aren't the lightest - the JEs are 296.... holy shit, I thought the JEs were 236! Ok, I guess these bastards ARE going to be VERY light!
Now, just before anyone flips out - Shawn's already told me the 294 ESTIMATE is usually within 2% of what the final ACTUAL PISTON will be. Therefore, they might be *slightly* heavier, but these will be some damn light pistons
Starscream, every aftermarket piston top I've seen for the 7M, looks just like a stock piston.
These Probes are the first I've seen to attempt to increase swirl and optimize quench. Will they do so more effectively than the stockers? We'll see!
Also, that may be the weight for JUST the piston - that may not include the wrist pin (as we will be getting beefier than usual wrist pins)
Ian - way ahead of you
I plan on doing exactly that, about 5-6k miles into my rebuild, to ensure everything is good - Have these gotten your interest? They aren't the lightest - the JEs are 296.... holy shit, I thought the JEs were 236! Ok, I guess these bastards ARE going to be VERY light!
Now, just before anyone flips out - Shawn's already told me the 294 ESTIMATE is usually within 2% of what the final ACTUAL PISTON will be. Therefore, they might be *slightly* heavier, but these will be some damn light pistons
Starscream, every aftermarket piston top I've seen for the 7M, looks just like a stock piston.
These Probes are the first I've seen to attempt to increase swirl and optimize quench. Will they do so more effectively than the stockers? We'll see!
Also, that may be the weight for JUST the piston - that may not include the wrist pin (as we will be getting beefier than usual wrist pins)
The weight was the only concern for me as based on the weight and the skirt length of JE's, this is what I was thinking Probe was sacrificing for weight>shorter skirts.
More information - Anyone paying through paypal, in the continental US of A, will pay a flat $20 shipping fee. The price varies, but from Ca to Miami, FL is $20. To NY is like $24, and obviously closer to CA will be cheaper - $20 seems like a good midpoint.
THAT IS ONLY FOR THOSE THAT WILL BE PAYING VIA PAYPAL. Anyone paying through Driftmotion's website (preferred method, btw) will have the actual shipping calculated for them
THAT IS ONLY FOR THOSE THAT WILL BE PAYING VIA PAYPAL. Anyone paying through Driftmotion's website (preferred method, btw) will have the actual shipping calculated for them
starscream5000 said:
i have a few pictures collected.
JE
weisco
Ross
i dont have any pics of the Arias or CPs for the 7M. maybe someone else does.
the Probe pistons are looking to be super nice. i cant wait.
Yep. Every single set of aftermarket forged pistons for the 7M is based off the stock piston.
These Probe Industries pistons, were designed around the motor itself!
BTW, group buy is *OFFICIALLY* open - head to Driftmotion.com and put your order in!
These Probe Industries pistons, were designed around the motor itself!
BTW, group buy is *OFFICIALLY* open - head to Driftmotion.com and put your order in!
Awesome post screaminglemon! Yes, now I can see there's a huge difference between the Probe and the competitors .
.
1st pic up there are one of my sets from memory the JE's
If the dimensions are close the probes will have to be thinner somewhere to be lighter than the JE's
Personally I wouldn't want anything lighter as to me the JE's are right on the limie of mass I'd use in a street motor where the tune is sometimes "suspect". I'd ask if they can either use a different forging or change the design to add a little. (remember it's NOT a race motor)
If the dimensions are close the probes will have to be thinner somewhere to be lighter than the JE's
Personally I wouldn't want anything lighter as to me the JE's are right on the limie of mass I'd use in a street motor where the tune is sometimes "suspect". I'd ask if they can either use a different forging or change the design to add a little. (remember it's NOT a race motor)
Not at all - but if the JEs were built from a stock piston, they'd have no idea where to truly put the strength of the piston - how can you possibly model the combustion process acting on the piston, without having the combustion chamber mapped?
Also, Ian, are the JEs weight measured with or without the wrist pins in place? The ~294 grams of the Probes, is without the wrist pins.
I'm certainly going to gather more information on these, but I told Shawn from the get go, we wanted a piston to handle 600rwhp DAILY DRIVEN - and I think we're looking at that!
Also, Ian, are the JEs weight measured with or without the wrist pins in place? The ~294 grams of the Probes, is without the wrist pins.
I'm certainly going to gather more information on these, but I told Shawn from the get go, we wanted a piston to handle 600rwhp DAILY DRIVEN - and I think we're looking at that!
Not 100% sure on the weights but I think it's without pins, I've e-mailed JE for confirmation.
I'm not trying to rain on your parade here Dow just stating from personal experience that I wouldn't want anything lighter than a JE for a street motor.
I was very much impressed at how the Ross set stood up to the extreme conditions I subjected them to in the last build and would have used them again if they had +40's as a stock item.
I'm not trying to rain on your parade here Dow just stating from personal experience that I wouldn't want anything lighter than a JE for a street motor.
I was very much impressed at how the Ross set stood up to the extreme conditions I subjected them to in the last build and would have used them again if they had +40's as a stock item.
Yep, no doubt that the Ross pistons will withstand a beating - IMHO, they are pretty much a stock piston, forged. I wanted something a little better for these.
Remember, the weight estimate is going to be low - they'll most likely end up around 300 grams, but I'll get ahold of Shawn over the next two weeks to hammer out the details, before we submit this actual order!
Remember, the weight estimate is going to be low - they'll most likely end up around 300 grams, but I'll get ahold of Shawn over the next two weeks to hammer out the details, before we submit this actual order!
alright fellers, thanks for all the brainstorming and great info. i don't really have the funds, but im jumping on this anyway! thanks especially to doward for organizing this!
the reduced weight might have something to do with the fact that there is material removed low on the piston compaired to the JE/Wiesco/Ross. the JE/Wiesco/Ross all have a full cylinder shape under the wrist pin but the Probe model has a relief cut away on either side under the pin.
edit. actually the JE has a small relief there too. but its much smaller.
anyway, i just hope that type of design wont "rattle" any more than the others. i doubt theres any cause for concern though, as the CP pistons for the 2JZ have a similar design.
edit. actually the JE has a small relief there too. but its much smaller.
anyway, i just hope that type of design wont "rattle" any more than the others. i doubt theres any cause for concern though, as the CP pistons for the 2JZ have a similar design.
I went to the Driftmotion website just a second ago and I see 3 big pictures of em. I'm just about to go sell drugs for about a week or something....:1zhelp: