JE Piston Tech

[ARUSSELL]

I am a Tech at JE Pistons and can help with any piston related issues or questions.

[curtisreed]

That's awesome, glad to have you here.

Curtis

[hammertime]

I am a Tech at JE Pistons and can help with any piston related issues or questions.

Have a set of pistons I cant figure out what brand they are , maybe you can help me here.
They are 4.560 bore for 555 # on piston 6243A6 is this your # or no ?

[ARUSSELL]

That part number 6243A6 is not one of mine but sounds like a Wisco part.

[hammertime]

That part number 6243A6 is not one of mine but sounds like a Wisco part.

thank you :D

[FAT622]

Hi,

I am building a 632 ci BBC N/A 14:1. Whats the difference between SRP and JE?

[ARUSSELL]

The SRP pistons are designed to be a sportsman level piston, where the JE is a full competion piece. The SRP is made out of a different alloy that is not as strong as the JE. The JE parts have more machining processes for a shelf part and have the ablity to be custom built to your application.

[jmarksdragster]

I am putting together a 460 SB2 head engine in a 9.5 AL Dart block. Our current thinking with the 4.25 stroke is to use a 6.3 rod with a 1.075 pin height (give or take depending on final deck measurement). Will that be the best to use for stability, wear, and reliability? Or should we look at a different rod length/pin height?

[ARUSSELL]

The SB2 head is a little trickey due to the fact the intake valve relif is pushed so far twards the edge of the piston. I would reccomend a little shorted rod like a 6.250 or even better a 6.200 to give more compression height and better ring placement.

[iTiPerformance]

[quote="ARUSSELL"]I am a Tech at JE Pistons and can help with any piston related issues or questions.[/quote

What about a -50cc dish on 1.100" CH? 4.125 bore. Running an Aluminum rod. :?:

[ARUSSELL]

ITI,
I am very sorry but you are asking for an impossible piston to be built. I think you need to rethink your combo.

[iTiPerformance]

ITI,
I am very sorry but you are asking for an impossible piston to be built. I think you need to rethink your combo.

Thanks for the help. :D I'll call JE to get some help and order pistons.

[v8Fiero]

[quote=ARUSSELL]I am a Tech at JE Pistons and can help with any piston related issues or questions.[/quote

What about a -50cc dish on 1.100" CH? 4.125 bore. Running an Aluminum rod. :?:

wasnt your orignal post something about a 600shot of nitrous on a 434sbc?? Kinna wierd I dont see an edited mark under your post but I could swear you had something like that before.

[ARUSSELL]

ITI works with me and is just trying to give me s#*t. He is also a tech here.

[andysvw]

i was sold a srp je 12.5 and now am told I need 11.1 I call je they said not to cut more than 40t off top , what can i do, thanks

[ARUSSELL]

I need more info like a part number or the engine combo to find your piston. Some of our pistons have thick domes but if it is a lightweight part the .040 is probally max.

[v8Fiero]

do you guys (or can you) make custom pistons for old harleys?

[ARUSSELL]

We have a good selection of Harley pistons in stock but can custom build if you have an engine we do not make parts for.

[torana434]

Hi, I have a set of JE pistons, part #213107, how much can be machined off these, can they be machined to an inverted dome? Thanks Dean

[ARUSSELL]

To tell you how much you can cut off depends on the usage of the engine. I need to know if drag or circle track, fuel type, and if nitrous is being used.

[torana434]

It will be used for drag racing and some very occasional "street" driving, I am thinking of fitting a Procharger system to it, was hoping to use 98-100 ron pump fuel

[ARUSSELL]

That piston deck is designed for a N/A engine and could be milled to a flat top but no dish cut in it. I would not recomend this piston for a boosted application.

[torana434]

Thanks for your help

[geosvet]

ARussell,

I just hurt my 364 SBC. I am using TRW L2278 pistons. I have been told they are now obsolete and Federal Mogul/TRW/SpeedPro does not have a replacement.

Does JE make a forged piston for a 364 SBC 5.7 rods that weighs about 540 grams? I need one piston.

Thanks, Geo.

[ARUSSELL]

Geo,

I apoligize I dop not have an old FM book, is that a flat top piston?

[geosvet]

ARussell,

I looked through my stuff and here's the info that I have.

The is a Forged Aluminum Piston for a 364 SBC 4.030 x 3.562

Comp Dist 1.52

Dome height .193

Comp Ratio 12.5 w/ 64cc heads

Effective Dome Volume 9.6 cc

Weight 575 grams with no rings and no pin

I hope this info helps.

Thanks again, Geo

[geosvet]

ARussell,

One more piece of info. The piston has a 1/16, 1/16, 1/8 ring groove configuration with normal ring groove spacing

[ARUSSELL]

I am sorryt but all I have are flat top pistons that weigh 475g. Best of luck to you, obsolite parts are hard to find.

[hammertime]

Does JE make a SRP piston for a 4.6100 Bore, be 4.375 stroke, 6.385 rod. Making a 584 CI BBC

[ARUSSELL]

We only have a piston for the 6.535 rod, I am not sure there is a crakn that is 4.375 stroks that will clear a 6.385 rod. I have parts to fir an conventional open chamber head and a 18 deg big chief.

[hammertime]

opps my typing mistake, 6.535 is correct.

What type of compression with 119cc head.

[Xrated1]

598 BBC, 14-1 compression J+E pistons, 800 lift camshaft, 7200 rpm, density altitude between 3500 and 6500 feet typically. Can I run VP c12 or do I need a better fuel?

[ARUSSELL]

598 BBC, 14-1 compression J+E pistons, 800 lift camshaft, 7200 rpm, density altitude between 3500 and 6500 feet typically. Can I run VP c12 or do I need a better fuel?


I would go with C14, the C12 you might be able to get away with but are pushing your luck.

[ARUSSELL]

opps my typing mistake, 6.535 is correct.

What type of compression with 119cc head.

That piston is 14.7 to 1 with the 119 cc head, part number is 243328, set up for a .043, .043, 3.0mm ring pack, part number J77008-4610-5

[hammertime]

opps my typing mistake, 6.535 is correct.

What type of compression with 119cc head.

That piston is 14.7 to 1 with the 119 cc head, part number is 243328, set up for a .043, .043, 3.0mm ring pack, part number J77008-4610-5

JE Pistons #532-243328

502BBC OPEN CHAM DOM

Sure we got thr right part # ? or is jegs wrong ?

I am thinking hard on maybe doing a special order pistons like 4.602 bore be less machine work, probably cost of pistons and bore would offset each other.

[ARUSSELL]

opps my typing mistake, 6.535 is correct.

What type of compression with 119cc head.

That piston is 14.7 to 1 with the 119 cc head, part number is 243328, set up for a .043, .043, 3.0mm ring pack, part number J77008-4610-5

JE Pistons #532-243328

502BBC OPEN CHAM DOM

Sure we got thr right part # ? or is jegs wrong ?

I am thinking hard on maybe doing a special order pistons like 4.602 bore be less machine work, probably cost of pistons and bore would offset each other.

That is the correct number and buying from me those pistons are 877.92 and 220.03 for the rings. If you want a 4.605 you are going to be looking around 1050.

[tweekd]

I was wondering what the difference was between the SRP and JE. I think the ones I have are SRP flat tops with two valve reliefs. Possible these can handle 300Hp worth of nitrous? I also run AFR's with 65cc's. The compression is something like 10:7. what are your thoughts? I run c-12 while I race also.

Thanks

[ARUSSELL]

The SRP pistons are made out of a 4032 alloy that is not as strong as a 2618 uded in a tradtional JE, I woulf not reccomend more then a 200Hp shot on a SRP. We do have some nitrous specific pistons what combo are you running?

[tweekd]

It is a 383, 4 bolt main block with studs. Eagle steel crank and H-beam rods, the pistons are the SRP's like i said flat tops with two valve reliefs, head gaskets are .041 I think or .039 I dont remember. Heads are AFR 195's with 65 CC chambers and studed. Cam is 241/246 @ .050 and .537/.540 lift.

The car made 385 RWHP and 365RWT with a vic Jr. and BG 750.

When I built the motor I wanted to be 11.50's on motor (pump gas, steetable and usable) which it has done already no problem.

The other goal was to go close as possible to 10.0 on nitrous. The kit I am buying goes to 300hp which I planned on using to get there. Am I crazy?
Am I gonna smoke these pistons? Will more octane help?

Thanks a million. I almost wish I never found this thread!

[ARUSSELL]

The piston was not designed to handle that much nitrous, not saying you are going to hurt it but everything has to be exact, and something being just a little off and you need a bodybag.

[zipper06]

How much compression can be made with a 434" S/BLK with SB2.2 heads, most heads are close to 50CC's. I know that alcohlol will not really work at less than 13.1 compression. Does JE make a piston for this combo. I would not put SRP's in my lawn mower, and Probe is a much better piston than SRP will ever be.

Don't mean to be abrasive but facts are facts.

JMO



Zip.

[edvancedengines]

If you are wanting a bad to the bone Nitrous Piston, I believe I sell what is one of the best there is. They are not sold for same money as Probe SRP or any of those though. I can make them as competive as any top name Custom Nitrous Piston is.

Ed

[ARUSSELL]

How much compression can be made with a 434" S/BLK with SB2.2 heads, most heads are close to 50CC's. I know that alcohlol will not really work at less than 13.1 compression. Does JE make a piston for this combo. I would not put SRP's in my lawn mower, and Probe is a much better piston than SRP will ever be.

Don't mean to be abrasive but facts are facts.

JMO



Zip.

A 434 with a SB2 head you can get about 15.2 to 1. We dont have any shelf piston but can make it as a custom. SRP has its market and nothing close to what you are doing, our briggs lawnmower parts are JE. LOL

[ARUSSELL]

ED,

Sorry we have never talked before so I am not familiar with your shop and your capablities, so this is not ment to put you down or look bad but where do you get forgings and what type of machinery do you have?

[Tod74]

How much compression can be made with a 434" S/BLK with SB2.2 heads, most heads are close to 50CC's. I know that alcohlol will not really work at less than 13.1 compression. Does JE make a piston for this combo. I would not put SRP's in my lawn mower, and Probe is a much better piston than SRP will ever be.

Don't mean to be abrasive but facts are facts.

JMO



Zip.

What is wrong with SRP ? just curious.

[zipper06]

How much compression can be made with a 434" S/BLK with SB2.2 heads, most heads are close to 50CC's. I know that alcohlol will not really work at less than 13.1 compression. Does JE make a piston for this combo. I would not put SRP's in my lawn mower, and Probe is a much better piston than SRP will ever be.

Don't mean to be abrasive but facts are facts.

JMO



Zip.

What is wrong with SRP ? just curious.


The SRP pistons are made out of a 4032 alloy that is not as strong as a 2618 uded in a tradtional JE, I woulf not reccomend more then a 200Hp shot on a SRP. We do have some nitrous specific pistons what combo are you running?

And this is from the man who sells them. If you're close to the ragged edge in RPM and close to lean for the best performance they are too brittle. I've had one failure with them and 2 failures with Wisco pistons. All on Alcohol. I want use a Mahle piston either.

JMO

Zip.

[ARUSSELL]

The SRP and all 4032 alloy pistons were never designed to be a full racing piston. The 4032 Alloy is more brittle due to the high silicon content. For a street engine it is nice to run a 4032 due to the smaller expansion rate. I have SRP in my 383 that makes 594hp and 531 torque in my daily driver. I built this engine knowing that nitrous or alcohol would never be used. I will say and gladly tell anybody when they are going beyond the abillities of a SRP.

Zip you need a 2618 piston no question.

[Tod74]

so alcohol is a NO- NO with SRP'S? even without NOS

[zipper06]

Yes Sir, ARUSSELL,

I didn't learn this until about 5 yrs. ago, and i have 2 engines with JE pistons in them, 1 a 434" and the other a 377" both on alcohol. There's no question in my mind that JE's are one of the best if not the best pistons on the market. I always look to JE any time i build an engine if they have the combo i need and i've built 3 this yr. for other people, they whine about the price, but they would whine a lot more if it broke.

JMO

Zip.

[ARUSSELL]

Yes Sir, ARUSSELL,

I didn't learn this until about 5 yrs. ago, and i have 2 engines with JE pistons in them, 1 a 434" and the other a 377" both on alcohol. There's no question in my mind that JE's are one of the best if not the best pistons on the market. I always look to JE any time i build an engine if they have the combo i need and i've built 3 this yr. for other people, they whine about the price, but they would whine a lot more if it broke.

JMO

Zip.

We do apreciate the loyality and the business, expecially when there are so many companies to choose from.

[ARUSSELL]

so alcohol is a NO- NO with SRP'S? even without NOS

I would not reccomend it

[tweekd]

I'll be buying JE's again next time I build a motor for the simple fact that ARUSSELL is taking the time to educate people when he doesn't have to.

[Pdmracing]

Thanks for your time, I have an what iwas told a 358 chev sbc
i pulled the pan & the pistins say je 521L & 521R ( i assume the sffix is positional) underneath, I cant find that in the catolog, any idea ogf what the are

[bbchevy]

I am a Tech at JE Pistons and can help with any piston related issues or questions.

I Have a Question for MR.ARUSSELL?
I have a set of JE BBC Pistons that i really NEED to replace the whole set,but was Kicking around a Partial set???
Part # 111721 then below that is 519818
4.375 Bore
Heres what is WEIRD?C/H i measure 1.400.
Is this a Shelf Piston and can you give me some Pricing?
The Combo is a 10.200 T/D BBC Block,it did have a 4.280 Stroke Crank,and a 6.635 Rod.
Going to Ditch the 4.280 Crank and go with a 4.250 Crank and a Set of Standard 6.635 Rods,2.200 Big End.The Old Rods are 2.100 on the Big End.
I also have 2-of the BAD pistons that i would like to send you for your PROFESSIONAL Opinion,as to what Caused the Damage???
Thanks
Greg 8)
[email protected]
231 690 5075 cell

[ashbros]

I have a 515 CID motor that is ready to assemble
I wish to make a 540 or 548 procharged motor
Block 9.8000 deck BBC
4.000 stroke Bryant Crank
6.358 Oliver rod
4.530 JE Piston flat top with slight valve cut relief & cool coated

How simple or difficult will this be or better yet, how many new parts am I going to have to buy.