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Author Topic:   Speedway's Hypereutecic pistons
Speed Racer X
Dirt Full Roller

Total posts: 61
posted November 28, 2002 05:40 PM
Has anyone used Speedway's hypereutecic pistons? They are about $130 in their cataloge, which is about half of what Speed Pros or Keith Blacks cost. Are they heavy, will they hold up, do you get what you pay for (usally!!). Thanks

ford5
Dirt Freak

Total posts: 298
posted November 28, 2002 06:21 PM
Speedways hyper pistons are brand name DynaGear. yes they are heavy, but the thing that doesnt make any sense to me is, that they require 1\16--1\16--3\16 rings, which generally cost at least twice as much as std. ring groove width rings. so why buy a cheaper piston, and have to use higher priced rings? JMO ford5

dirttrackracer
Dirt Newbie

Total posts: 0
posted November 28, 2002 08:02 PM
Speed pro is alot better piston than KB and can be bought almost anywhere for $130 a set.KB is double that.Speed Pro takes the standard rings instead of the thinner,more expensive rings.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted November 28, 2002 09:29 PM
check ebay for the speedpro/federal mogul hypereutectics. i've seen them on there for under $100. $95 for a 302 ford.

CHRIS ELLIS
Dirt Newbie

Total posts: 4
posted January 12, 2003 10:38 PM
stay away from dynagear they are heavy on rods and rod bolts i have good luck with kb claimer pistons but you will need to have .026-.030 top ring end gap for it to rev.

racer17j
Dirt Forum Champ
Total posts: 1565
posted January 12, 2003 11:33 PM UIN: 54865418
hey if you guys want cheap hyper pistons i got a set of speedpros the other day with rings and a full set of 77 bearings for 125 including shipping the guy said he has a crap load of um so go check it out just do an ebay search for chevy 350 pistons i was bidding on a bunch of um start out at 105 with a buy it now for 115 i lost all of them so he just sent me an invoice and sold um for the buy it now price without having to go thru ebay

racer17j
Dirt Forum Champ
Total posts: 1565
posted January 13, 2003 12:40 AM UIN: 54865418
here is the link looks like he's selling for 120 now but still a good deal http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33623&item=1876711411

66jj
Dirt Freak

Total posts: 352
posted January 13, 2003 06:40 PM
hate to tell you but those are cast pistons made by federal mogul, and are 49-59.99 all day long from almost anywhere.

i have allways wondered how they can get away with calling them hyper, on one page and cast on another in the same catalogue..

also those ones if i remember are way low on comp even for a ft, they have the radiused top edge.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 13, 2003 07:58 PM
sorry 66jj, you're wrong on this one. the "H" in front of the part number indicates that it is a hypereutectic piston. H345NP is hypereutectic and 345NP is standard cast. both are federal mogul.

[This message has been edited by outlawstock17 (edited January 13, 2003).]

sdhnc29
Dirt Freak

Total posts: 467
posted January 13, 2003 09:17 PM
And both manufactured by SylvoLite for Federal Mogul Just happens to be the same piston manufacturer who make's KB's . In my opinion , the over rated and over priced KB's (SylvoLites) , are just that ! If a guy is going to buy a set of KB's , I think he would be far better off spending a few extra $$ , and buying a SRP or Pro-Tru .

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780

Speed Racer X
Dirt Full Roller

Total posts: 61
posted January 14, 2003 06:35 AM
Thanks for all the replys!!! Santa was good this year and we've decided to go with SRP # 140348. Thanks again.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 14, 2003 08:18 AM
i agree sdhnc29, the KB's are too expensive for a cast piston. i bought one set and it will be the last set. the JE/SRP is a far better value.

speed racer x, if you see that santa guy, tell him i've got a bone to pick with him.....he didn't bring me anything for my racecar! grrrrr......

RC Racing
Dirt Maniac

Total posts: 144
posted January 14, 2003 11:02 AM
Looking for guidance for piston and intake manifold choice. Also, is there a web site that list casting # for intakes?
I'm building a motor for claimer class in SE TX known as "Limited Modified". Engine rule(in part):
360 cubic inch max. Zero deck height. 10:1 four valve relief silverlite cast pistons only. Open chamber cylinder heads 76' or later. 450 max lift hydraulic cam. 1.5 long slot steel rocker arms. No roller tips. No bronze bushings in lifter bore or custom lifters (stock type hydraulic lifters only). ***** in studs and guide plates allowed. 120lb stock dia springs max, stainless valves 1.94 intake & 1.50 exhaust. No angle mill. Steel timing chain. Stock crank and rods. No 6" rods in GM motors. A.R.P Rod, crank and head bolts and studs are allowed. Claimer oil pan & maximum fluid damper allowed. Cast iron water pumps only. Cast iron intakes 76" or later only.

Appreciate the assistance

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