JE Piston Tech
 

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

That's awesome, glad to have you here.

Curtis

Re: JE Piston Tech
 

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 ?

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

thank you :D

Hi,

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

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.

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?

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.

Re: JE Piston Tech
 

[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. :?:

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.

Re: JE Piston Tech
 

[quote="iTiPerformance"]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.

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

pistons
 

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

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.

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

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.

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

piston 213107
 

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.

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

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.

Thanks for your help

SBC Stroker Piston
 

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.

Geo,

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

Info for TRW L2278 .030 Piston
 

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

L2278 Pinton Info
 

ARussell,

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

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.

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

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.

opps my typing mistake, 6.535 is correct.

What type of compression with 119cc head.

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.

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.

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

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?

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!

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.