the build is on my first post... edlebrock 750cfm carb (currently on car), ta 290-94h-350, heads and TA intake gasket matched and cleaned up with stock sized valves, new springs, factory rockers, hooker headers 2.5in duel exhaust, pertronix ignition , 2800 stall converter and eventually 3.42 rear with posi.
Anyone have any opinions on these pistons? http://www.summitracing.com/parts/slp-340p40/overview/make/buick if anyone has some 040 pistons they are willing to part with let me know!
looks like a good piston or look at summit uem 1734 -40 flats of course you will need to buy 8 rather then 6 remember that the 3.8 v8 used the same pistons
Tip: When buying flat top 3.0 V6 Pistons for your 350 remember to buy 4 sets of 6 pistons and then you have enough for 3 V8 engines... Plus all your friends will want to buy the spare pistons after you do a smokeshow and haul ass.... http://www.ebay.com/itm/82-87-Buick-GM-181-3-0L-OHV-V6-6-FLAT-TOP-PISTONS-020-030-040-/271002654509
i get nothing whet i search their site for that. NVM Found them! ---------- Post added at 09:26 PM ---------- Previous post was at 09:23 PM ---------- any one know if i can call and buy just two pistons? other wise.. what do i do with the other 4? that wouldnt be much savings if i were to buya set of v8 pistons from sealed power or are these better pistons? any one want to go in with me in buying a few sets to split up? haha ---------- Post added at 10:11 PM ---------- Previous post was at 09:26 PM ---------- well i call redline and left a message asking if i can purchase two extra pistons, will these change how far the pistons sit in the block? more or less? I know to check after i get them in the block but just wondering. looks like with these pistons (if they sit the same) i can shave the block to .055 and get the compression right where i need it.
What I would do is order the pistons, when they get in you can have the machine shop install them on your rods and then you can mock it up and see how far the pistons sit in the hole and go from there. I know what the compression height is on the 3.0 pistons however I do not know what the compression height is on the pistons you have in the block now so it is tough to say how far in the hole the new pistons would be. Last time I did a calculation on the compression with the 3.0 pistons it worked out to about 10.5:1 without much block or head milling and 11.5:1 with a zero deck and heads milled a bit.
sounds like a plan, do i order the pistons 040 over still? ---------- Post added at 03:40 PM ---------- Previous post was at 03:39 PM ---------- nvm i do, can i use my rings from the other pistons? also is it worth it getting these flat top pistons? or should i spend a couple bucks more and get these http://www.summitracing.com/parts/slp-340p40/overview/make/buick
Yeah still order the 40 over pistons either way you go... Same bore size. The summit pistons have about a 0.030 taller compression height vs the flat tops however we do not even know the CC of the dish of these Summit pistons. If you knew what the actual deck height was then we could calculate the depth the piston would sit in the hole based on the compression height of the piston... Or if we knew the compression height of the 20 CC dished piston you have in there, then we could just adjust the depth of the piston in the hole by comparing the two piston's compression heights. You may or not be able to use the same piston rings as you have on your current pistons, but I would just buy matching pistons and rings and not risk needing to make another order.
http://www.buyracingparts.com/pisto...totec-forged-350-buick-dished-piston-kit.html Call and see if they will supply a .040" over piston.
the machine shop should be able to get the pistons for you and get 8 here is a clevite number 224-2225 and just get 040 over. or call summit and ask if you can get 8 of the 1734 - 040 85 century 3.0 pistons northern auto parts mite have them also
Just gave summit a call and you can order single pistons! when you search the number just put a s in front so S1734-040. The ebay kit is a bit cheaper so if all else fails ill order the set from ebay and two extras from summit.. for now something else is in the worksray:
This is the best you can do for the dollar!! You get pistons with a CH that will give you zero deck. CR should be around 10.25 @ zero deck They come with rings They are forged 4032 alloy They offer some quench And you can get them .040" over. Here is a quote: AutoTec is a High Quality, Precision Manufactured piston option. That comes at a very respectable price. Our Design Specific Forging allows us to manufacture our parts with less machining time, thus allowing us to keep production cost down. Then pass that savings on to you, the customer. Made out of 4032 High Silicone Aluminum Alloy, it has great wear resistance, a low expansion rate, is very durable, and is very low in friction. These pistons accommodate multiple uses including. Your local auto shop, muscle car restorations, performance street rods, as well as many spec racing classes. They can also withstand mild nitrous kits and small turbo or super chargers. Just about everyone can benefit from the excellent value the AutoTec line carries. Keeping in mind these pistons were originally designed for about 600 Horsepower. In Small Block applications, we have customers that frequently fine tune engines that yield 850+ Horsepower with a bit of Super Charger boost. Bore, Ring Pack, and Compression Distance changes can be made to any shelf part at no extra charge. Meaning that if you do not see your application listed in the guide, we can make what you need without charging a custom price. Every part is made with same high quality machines and tools as our RaceTec line including diamond turned ring grooves, and skirts. Not to mention our parts are 100% made in the USA. http://www.buyracingparts.com/pisto...totec-forged-350-buick-dished-piston-kit.html Paul
Sorry but spending $700 on pistons is not in my budget or plan, if I was building a race engine then I would look onto this more but I think I've got my plan pretty figured out already. Thanks for the advice though
So it looks like ill need to get the pistons .055 in the hole witha 58 cc head(still need to check) to put me at 10.5:1 compression. If i can leave the heads untouched i wont have to grind the intake side down if im only milling the block right?
Milling lots off the block or the heads a lot will still make the intake fit differently. You can either match mill the heads or cut the intake. Any good machine shop can do that without an issue.
don't forget that all the milling is gonna bring the valves closer to the pistons so that will need to be measured once you get cam in
