RE: Hupereutectic Pistons
Login  | |
|
RE: Hupereutectic Pistons - 12/4/2006 11:23:35 PM
|
|
|
FlufyTiger
Posts: 580
Joined: 9/2/2006
From: Baltimore, Maryland
Status: offline
|
Yeah, it's called a hydro booster, they're mainly found on big trucks that need a heavy duty boost to the brakes and don't have suficient vacuum. I still prefer the vacuum boost system, personally. There's less that can go wrong, and there's a significant increase in brake booster failures when you move to a hydroboost system, I know mechanics who live and breath brake work who've only replaced one or two vacuum boosters over 15 or 20 years, and repaired 2 or 3 hydroboosters a year. Not a huge number, but when you take into account the number of hydroboost systems out there, it's pretty big.
|
|
|
|
|
|
|
|
|
RE: Hupereutectic Pistons - 12/5/2006 11:57:49 AM
|
|
|
FlufyTiger
Posts: 580
Joined: 9/2/2006
From: Baltimore, Maryland
Status: offline
|
I'm not saying they fail often, just that they fail more often than vacuum systems do. Besides, I personally prefer the feel of the vacuum system over the hydraulic. Probably just because just about every car uses them, and I'm just used to it. In any case, though, there's ussualy alot less involved in putting a vacuum pump than a P/S based brake booster system.
|
|
|
|
|
|
|
RE: Hupereutectic Pistons - 12/6/2006 5:25:00 PM
|
|
|
rat454
Posts: 159
Joined: 12/6/2006
Status: offline
|
Uncle bill - one of the best explainations of Octane rating i've ever read. i've tried to explain it to people and just couldn't get the concept across to them...
just a side question.. how (or does) alltitude effect the selection of octane to use at a specific compression ratio?
would you agree in general that a flat top piston provides a more uniform flame front and tends to require more octane or less octane?
FlufyTiger - my recommendation is to skip the cast and hyper and go for the forged. it has been my experence that sooner or later folks want more power out of a combination and will be limited by the earlier choices made...that high feeling after you nail it the first time wears off and then the need for more starts working on you..that blue botttle starts looking real good or you want that performance tune that gets you to much advance and then the piston starts rattling around in the bore and a skirt breaks off...
Greg
_____________________________
71 Camaro roller cam 454 LS6 tremec TKO 600 5 speed 2.56 gears,t-top, New Mexico plate "RAT454"
74 Monte Carlo 95 LT1 drive train swap, full computer
77 C10 short step 4x2 454 T-400 hugger orange 496 rwtq
67 Buick Electra 225, 430 tire burner
|
|
|
|
|
RE: Hupereutectic Pistons - 12/6/2006 6:52:48 PM
|
|
|
FlufyTiger
Posts: 580
Joined: 9/2/2006
From: Baltimore, Maryland
Status: offline
|
Why are you telling me that? I never even considered buying anything but forged. I didn't start the thread, and I wouldn't be the least bit surprised if the person who did isn't even reading it anymore, as long as it's been up here. As far as I'm concerned, anything I want to build will need the strength of forged iron or steel by the time I've got it where I want it, so cast or hypereutectic pistons aren't even considered plausible options.
|
|
|
|
|
|
|
RE: Hupereutectic Pistons - 12/7/2006 9:19:32 AM
|
|
|
uncle bill
Posts: 819
Joined: 9/3/2006
From: San Antonio, Texas
Status: offline
|
rat454
I've always said that the best domed piston has no dome at all. Of course, the flatter a piston is the better the flame will travel without disruption. If You most use a dome to get the needed compression, then hand shape the dome to remove any areas that will disrupt that flame travel. I've spent many, many hours shaping pistons for that purpose. On the altitude issue, it becomes more complicated. Of course, when You remove oxygen from the air, You must increase something else to compensate for it. In most cases increased octane will do. In the extreme, a Top Fuel dragster or funny car running on nitromethane must increase the oxygen through the addition of more compression ratio and turn the supercharger faster to keep the horsepower level to compete. I've seen as much as a 2 point compression increase ( Denver Race ) from about 8.5-1 to 10.5-1 to compress the less dense air. In the case of the average car, You cannot increase the compression so you live with the lessened horsepower. You don't have a supercharger to force air into the engine.
|
|
|
|
|
RE: Hupereutectic Pistons - 12/11/2006 4:12:04 PM
|
|
|
69camaro1
Posts: 124
Joined: 10/11/2006
Status: offline
|
Well I looked up hupereutectic pistons on the internet to see what some machine shops thought of them and for the most part they say they are very nice pistons when it comes to resisting detination and can hold up to 500hp. By the way I was wanting to get the compression part straight so if I run 10.3.1 compression pistons with aluminum heads will I get 10.3.1 compression or 11.3.1? I was thinking it would be 11.3.1 and there is no way I want to run any higher than 10.5.1 compression on a daily driver.
Thx again for all of the imput.
< Message edited by 69camaro1 -- 12/11/2006 4:15:16 PM >
|
|
|
|
|
RE: Hupereutectic Pistons - 12/11/2006 4:40:35 PM
|
|
|
FlufyTiger
Posts: 580
Joined: 9/2/2006
From: Baltimore, Maryland
Status: offline
|
The aluminium heads don't change the compression because they're alluminium, they change it because they have different combustion chamber sizes.
|
|
|
|
 Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds
Camaro Prices
Chevy Camaro
Camaro concept car
1969 Camaro
Advertising Info
|
Contact Us |
Advertising |
CamaroForums.com Partners |
Camaro Links |
Archive |
About Us |
Link To Us |
Legal |
Privacy Policy |
© Camaro Forums
Camaro Forums .com is not affiliated with or endorsed by Chevrolet Motors Division or General Motors.
|
Printable Version
