Summit Racing Pro LS Pistons

[@johnbehneman1546]

Excellent video, thanks for the education. Just what I need for my LS build.

[@johnbehneman1546]

Thank you so much!!!! Great video and education on your Pro LS engine parts. Thanks for sharing!!!!

[@antwain7942]

The charts on your website are to small. When zoomed in, it's blurry!!! Thats while using a smart phone. Can you fix this?

[@alloyspeed1889]

I have an lq4 and here is my question. If I use the standard size summit piston are they drop in after a light hand hone or does the cylinder need .002 taken out with a ridged hone? I'm just wondering if the pistons are undersized from the stock piston. I'm trying to get the correct piston to wall clearance.

[@SummitRacing]

Thank you for your question. The pistons are designed to drop into a factory bore with .004 metal to metal (skirt coatings take up some of that. With a mostly fresh block, we recommend a brush hone that cleans the metal vs. removing it. If you have a noticeable ridge, that will be over a couple of thousandths and keep in mind that even .006 piston to wall is 50% more than recommended and can lead to piston slap. Especially when cold. For this reason, we make .005+ oversizes for a very slight hone that is not expensive to do at a machine top when cleaning the block and doing new cam bearings anyway.

[@fideljrguerra5400]

Is there a way to email you guys? I got a question about some pistons and rods for a 5.3 and I’d like to make sure I’m getting the right ones for my build

[@robertburrell8676]

Will these fix my piston slap on cold starts?

[@Boostededdy]

I bought the 408 stroker kit and I got the complete piston ring set, and then in the boxes where the pistons were I got an extra 8 rings?

[@autumnjeserich2689]

I'm doing a 402 stroker and my pistons also came with 8 mystery rings, did you ever figure out what they are? I came here trying to figure out what they are. Cause the listing says no rings included

[@nightbasser73]

What is the weight difference between these and stock ls pistons?

[@SummitRacing]

Thank you for your question. These pistons will rarely weigh close to stock due to the wide variety of o.e. variances. Balancing the crank will be required.

[@nightbasser73]

Summit Racing thanks!!!!

[@MILO20121]

Awesome thxs u question there rated at 1000 hp in today's world that's stock lol I have a 6.0 n want to push 1400 hp at the wheels any ideas thxs

[@SummitRacing]

It sounds like you are looking at doing a heavily boosted build. I would suggest you look at one of our desktop dyno simulator programs for ideas on the build you are want to do. You may wish to consult an engine builder about your needs as well. When you are ready to get started on parts, give us a call @ 1-800-230-3030, and we can get you going. www.summitracing.com/search/part-type/computer-software?fr=part-type&SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=desktop%20dyno

[@MILO20121]

@@SummitRacing thx u thx u dont stop making these videos u help me n others like me on all those crazy questions u started the video with lol

[@davidcunningham00]

I need a set from my Lq 4

[@Gmullin12]

Make sure you get your crank balanced

[@harvmac]

didn’t quite get info on a max rated HP capability of the pistons! if there’s any information out there, please lmk I have a set of summit pro ls piston and would like to know so I can determine my low and max hp build.

[@SummitRacing]

Thank you for your question. The pistons are rated at 1000 horsepower as measured at the rear wheels with the pins that are included. For over 1000 or any time a 300 shot of nitrous is added at any horsepower level, a thick-wall tool steel pin upgrade is recommended. Part numbers for pins are WIS-S718, SUM-S719, or SUM-S720. With these upgraded pins, the pistons have been utilized in vehicles making 1500 horsepower and more with good tuning.

[@JustAGuy781]

So if I am running a Gen4 4.8L with boost then do I need the 7cc dish or 2cc dome pistons and I don't want to have to mill my 799 ported heads. And this is in a 2011 Silverado daily driven truck.

[@SummitRacing]

Thank you for your question. The 2cc domes would put compression in the 9.4:1 range with a 4.8. That would be advantageous. Remember you will need a Gen. 4 bushed 4.8L 6.275 rod length and 1.326 compression height piston to get the correct deck height. Here’s a link to a standard bore version of the piston that work with the shorter stroke longer rod 4.8 and the longer stroke shorter rod 5.3. www.summitracing.com/parts/sum-326943780-2f . We also have a .945 pin version of this piston if the bushings need honed to clean up.

[@JustAGuy781]

@@SummitRacing so basically the stock Gen4 4.8L rod with the 2cc dome pistons you sell will work fine correct?

[@johnreynolds6291]

Can I put those Summet Pro LS Forged Pistons in my 05 5.3 Cast Iron small Block or will in ping?

[@SummitRacing]

Thank you for your question John. The Summit Pro LS pistons are designed to run tight without any more noise than factory and this is with factory stroke or even the strokers. The important thing is to measure the block and hone as necessary to achieve the correct piston to wall clearance. Even .002 worth of wear increases recommended (.004 to the gauge point under the coating film) piston to wall clearance by 50%

[@andreiv8186]

Wish they hade someone than could help you choose the right parts for your build…

[@Anarchy-Is-Liberty]

Why the hell doesn't any make a 13:1, 14:1 piston for these engines? This is insane!!

[@jasonblowers2808]

if you want that compression the piston is half the puzzle. need to mill the head surface down or get new heads with smaller combustion chamber

[@elvynortiz3456]

What's the power rating on them?

[@SummitRacing]

Thank you for your question. The pistons are rated at 1000 horsepower at the wheels with standard pins. Tool steel pin upgrades are available to give them additional capacity.

[@elvynortiz3456]

Part # i need them for my 5.3 lm7 2003 im planning to boost the soul out of it

[@SummitRacing]

Hello, we have four available bore sizes and they can be used with Gen. 3 rods, Gen. 4 Rods, and aftermarket 6.125 rods. If you are going for big boost, the 6.125 is a good option but we also make a Gen. 4 version that has a larger pin diameter. Here is a link to the filter that can help you narrow it down or you can give us a call and we’ll find the best option. www.summitracing.com/oh/search/product-line/summit-racing-pro-ls-forged-pistons/part-type/pistons/stroke/3-622-in/piston-style/dish-with-two-valve-reliefs?N=bore-in%3A3-780-in_3-785-in_3-810-in_3-820-in%2Bpiston-style%3Adish-with-two-valve-reliefs&SortBy=Default&SortOrder=Ascending

[@petejoseph8257]

Try making some for LS3 bore. 4.065,

[@petejoseph8257]

Never mind, I see you have.

[@davidreed6070]

Do you make these pistons, I always thought JE made your pistons. Either way, they are very good pistons.

[@SummitRacing]

We do in fact manufacture parts!

[@dumbyramos4011]

MECUSTA LA CANAL

[@ThunderAppeal]

The background noise ('music'?) completely unnecessary and totally distracting. A lot of good information here mostly ruined by this 'music'.

[@SummitRacing]

We appreciate your feedback. We have since changed our music quite a bit. Thanks for watching!