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#1
11-03-2008, 09:34 PM
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Keith Black Forged pistons
I see these on pacific performance's website for a very reasonable price...I know that TRW's are around the same from summit, and I've heard that they are heavy. Are the KB's any good? I've heard good things about their hypers, but not much on their forged. I'm seriously considering them. Thanks
-Jason
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1999 Trans Am Ws6 Slp Lid, K&N, Smooth Bellows, Ls6 intake, Spec Clutch, Spec Alum. Flywheel, Spintech Cat back. 1970 Firebird Esprit 455 Pro Street project Last edited by MetalHead175; 11-03-2008 at 09:58 PM. |
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#2
11-04-2008, 07:58 AM
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Their forgings are excellent. We just aquired a set for a 455 project. KB really did their homework on the new forgings, light years ahead of their HT offerings.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#3
11-04-2008, 10:13 AM
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Quote:
Ditto. |
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#4
11-04-2008, 10:39 AM
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KB forged
So with the new forged KBs, is the ring land issue non-existent as was with the HTs?
Cliff/Dude, in your opinions, what design characteristics do the forged KBs have that are different from the TRW design.....and any benefits possible? Last edited by TinjunTribe; 11-04-2008 at 10:40 AM. Reason: Change "cliff" to Cliff/dude |
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#5
11-04-2008, 11:54 AM
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Right to start with, they have grooves for spiral locks, short skirts, nice light pins, and moved the ring lands down just a bit. The pin height is low, so not a lot of material needs to be removed from the block for zero decking. Quite a bit of "meat" in the tops as well, right on for size/balance, etc.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#6
11-04-2008, 02:40 PM
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Thanks for the great replies guys. In your opinions, would they be good for a boosted application too? I'm going to build the short block stout now as much as my current money supply can allow, so that later when I go the 871 route, I won't have to do much to it. So far I like what I hear..What does he mean though, about the ring land area issue in the HT's?
-Jason
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1999 Trans Am Ws6 Slp Lid, K&N, Smooth Bellows, Ls6 intake, Spec Clutch, Spec Alum. Flywheel, Spintech Cat back. 1970 Firebird Esprit 455 Pro Street project Last edited by MetalHead175; 11-04-2008 at 02:58 PM. |
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#7
11-04-2008, 04:17 PM
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Sounds Good
Quote:
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#8
11-04-2008, 09:20 PM
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They are a great design. Light, nice quality material, and a great price. We have dynoed a few with them with great results. For the price they are a great piston. We always have them in stock. If we don't have them in stock it means KB is out of them! LOL!!
Be Cool, Ace
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Am I glad I got out of the business I was in? HELL YEAH!!! |
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#9
11-04-2008, 09:43 PM
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Ken, what's the pin height on the 455 stock rod length piston? Do they come with pins? Weights? Do you have any 455+.060 flat tops in stock? Thanks -Jim
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#10
11-04-2008, 09:57 PM
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Ken Brewer
Can you offer a engine kit with these pistons that is competetive with the federal mogul engine kit? I.E. Pistons Rod bearings Main bearings oil pump gaskets 650.00 I suspect there would be great interest.
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#11
11-05-2008, 04:06 PM
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I'm with Rod on this one.
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1999 Trans Am Ws6 Slp Lid, K&N, Smooth Bellows, Ls6 intake, Spec Clutch, Spec Alum. Flywheel, Spintech Cat back. 1970 Firebird Esprit 455 Pro Street project |
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#12
11-05-2008, 04:18 PM
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MetalHead, the KB hypers have a tendency to break off a piece of the top ring land at the first sign of any detonation,the ring gaps have to be set huge to stop the ends butting too. All the broken sets I've seen have had this almost identical damage. I wouldn't use another set if they were free.
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#13
11-05-2008, 05:31 PM
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Taff thanks for the explanation. That does not sound like a good design...
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1999 Trans Am Ws6 Slp Lid, K&N, Smooth Bellows, Ls6 intake, Spec Clutch, Spec Alum. Flywheel, Spintech Cat back. 1970 Firebird Esprit 455 Pro Street project |
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#14
11-05-2008, 05:37 PM
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I got a set of the Probe SRS forged pistons from Ace for my rebuild. They are almost too pretty to put in the engine, NOT. Only a little more than the KB's.
Between the SRS pistons and the ultralite rods the machinist had to take a lot of metal off the crank to balance it. Should make it rev easier.  Stewart
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1976 TA, nose converted to 1970 style, 406, ported #13 Heads, '70 iron intake without crossovers, Q-Jet - Cliff style, RARE OS manifolds, Pypes duals w/crossflow, UD 230/238 custom HR 4/7 swap cam with solid roller lifters  , Hydro-Boost 4-wheel discs, 4 Speed, 3.23 posi.“Nothing in life is so exhilarating as to be shot at without result.” - Winston Churchill |
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#15
11-05-2008, 05:37 PM
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Quote:
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#16
11-05-2008, 09:40 PM
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Very nice pieces and as everyone said nice and Light, Plenty strong for a Blower IMHO and are just about as good as any SRS or SRP Ive seen FWIW
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D.S.R.E. Your NW Pontiac Street/Strip Engine Builder, Specializing in Cylinder Head,Intake Manifold,and Exhaust Manifold Porting services and Building the Most Efficient stock rebuilds to Hi HP Pump Gas and Race Combinations for Pontiac,Buicks,Olds,FE Fords,385 Series and HP Gen 3 and 4 LS engines! 2006 silvy Z71 4X4,383 LS 600+hp NA Shared Toy-66 Lemans 470cid by me 537hp 580tq-manifolds, 570hp 590tq-2"headers,custom cam,rpm intake, mild e-heads, Looks stock ;-} |
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#17
11-06-2008, 03:29 PM
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Sweet deal...thanks guys for your help!
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1999 Trans Am Ws6 Slp Lid, K&N, Smooth Bellows, Ls6 intake, Spec Clutch, Spec Alum. Flywheel, Spintech Cat back. 1970 Firebird Esprit 455 Pro Street project |
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