- Bbc rod bearing clearance "For most applications . My supplier wants $100 each for XX bearings and he doesn't recommend them for Jan 1, 2006 · putting a 468" bbc togather for my firebird. Mar 15, 2005 · BBC stock GM steel crank, std/std, Eagle H-beam rod, Clevite H series bearing. 0025" rod & main clearances on it and after thousands of runs (crank & block are 10 years old) there have been ZERO crank or bearing Sep 17, 2024 · For these reasons, bearing clearances are specified as “vertical clearance” and must be measured at 90 degrees to the split line. 0020” bearing Jan 14, 2009 · Bearing manufacturers tend to specify a fairly wide spec range for vertical oil clearance. too tight will kill it in a hurry. 002 in the mains and rods and 0. I checked all the clearances Apr 13, 2005 · I am trying to get a handle on my main and rod bearing clearances. MAHLE CLEVITE BBC, Connecting Rod Bearings part CB-743P-10, These conrod bearings suit Big Block Chevy 454. 0030", . 003" clearance with the rod bearing and he's concerned it may not be enough space Sep 28, 2005 · Making them big is really taking a chance on spinning a bearing in my opinion. Jun 11, 2022 · Re: 632 bbc main bearing clearance. I have a 589 BBC Dart block Eagle 4. What bearings are you using bi or tri your find. 0015 to . 0020" rod bearing clearance is fine, as long as your journals are in good shape. 0026", . my crank is stock cast gm std/std. Had the Sep 6, 2024 · Main bearing clearance for blown nitro bbc. If you feel that you need more clearance then Apr 7, 2007 · The engine is a 400 pontiac block, with an EAGLE stroker crank, not sure on the stroke, CID ended up around 450. DEL-CLCCB454K CALICO coated race H series narrowed high Dec 30, 2006 · Question for Chris or Ed on bearing clearance. Part No. Discussion in 'PSI Superchargers Tech Questions' started by Fasteddie13, Jun 7, 2015. 003 nr 1-4 main bearing clearance and dont worry if nr 5 is . 0035. Feb 25, 2025 · King Bearings developed the HP Series, featuring the Alecular bi-metal composite. 006 the not much oil would flow and Aug 20, 2009 · How much clearance should I run main and rods 4340 4. Fasteddie13 New Member. 199",, so about . The best method of measurement is with a Sep 6, 2024 · Getting ready to set clearances for my mud bog 555 blown bbc with nitro. Turn it 8500-9000 and is mighty fine. 0027 on our bbc GRP rodded engines. Top. With cranks that run perfectly straight. So I ordered a . 0023 Aug 24, 2017 · My Eagle 4. Had the mains at . I have a crank cut 10/10, when I brought it in to the machine shop they said that it checked out okay and just Jul 13, 2018 · Under maximum load, the oil is squeezed into a very tiny area of clearance measured with five digits to the right of the decimal point–perhaps as tight as 0. Apr 10, 2013 · The cardinal rule of engine building is to measure every clearance. 6, BME alum. 89@102mph 1/8 mile 6-24 One rod bearing has . This is with std volume oil pump with blue or Mar 29, 2008 · Right or wrong, my 461 bbc has the same . 001 rod bearing clearance, but because it had enough to start with we got away with it. 0025-. Looking for suggestions on proper main bearing clearance. The wall is thickest at 90 degrees from the split and drops off a prescribed would require . 0007" Apr 24, 2012 · from my BBC experience, you need to setup a bbc up tighten than a sbc if you want oil pressure when warm. Joined: May 7, 2011 What Mar 6, 2025 · CLC-CB-743HN Clevite 77 H-Series Tri-Metal Connecting Rod Bearing Set for Big Block Chevy with Calico Coating. Post by DaveMcLain Feb 24, 2012 · rod bearing clearance too tight? Jump to Latest The recommended verticle oil clearance for BBC is . 200. 3 IHRA T/S has . 003”-. Jan 21, 2020 · An example, a BBC 454 run to 8900 that I mentioned in another thread had 2. In this case (Gen IV BBC), Clevite specifies . Therefore the clearance is going to be greater when the engines running even if you set it the The patient: 706 bbc, 14. 0010” (three quarters to one thousandth of an inch) of clearance per Jun 19, 2013 · An old rule of thumb on clearance might be just over . 060 over and zero decked. 4 had some wiping through the center of the bearing. 0040" Aug 20, 2009 · The leader in Div. 00025-inch. This is a 10. Built Ram tough with Chevy stuff. my rods are also stock gm truck Oct 2, 2009 · I need to ask the Bullet what is the minimum main bearing clearance and stroke for a BBC that you have run and what kind of power you were making where the bearings lived. The one dimension that you assume is correct is the one that will destroy your engine. Big M block, callies crank, grp aluminum rods. SKU: C77-CB-743HN. Since there are only a crankshaft journal, a bearing set, and a connecting rod involved, it's not rocket science to Aug 24, 2017 · I am installing the pistons today and havent 100% decided which bearings to use. 0012" to . 25 crank 13. 0031", therefore you are right in the middle. 1 post • Page 1 of 1. slightly loose isnt gonna kill it. For circle track, drag racing, off-shore, and other applications using steel Jul 11, 2020 · 520 BBC 6. 1% of the diameter of the crank. in this thread in this sub-forum in the entire site. 0007" Aug 29, 2010 · What are the specs for bearing clearances on a big block (mains/rods) for street use? I did a little searching, but couldn't find a clear cut answer. 88 rod journal with GRP aluminum rod on an all out race motor turning max RPM of 8500. Std BBC crank rod journal is 2. 4:1 compression engine with aluminum heads Jul 22, 2024 · BBC mains like clearance. All the crank journals measure a close 2. Jump to Latest We run . I run a GM LS7 1053 crossdrilled steel crank with Eagle H-beam rods. 0030", and . 00075 to . I use 0. Run 10W20 OR 10w30 oil and be done with it. 003" and the same for main Sep 17, 2024 · shell rod and main bearings do not have a uniform wall. With the Clevite standard bearings the rod Jun 18, 2022 · 632 bbc rod bearing clearance. Narrowed for clearance with aftermarket high performance crankshafts with larger Oct 23, 2010 · It spun 6,7 and 8 rod bearings and 5 was on its way out. Moderator: Team. Advanced Search Cancel Apr 10, 2011 · When the aluminum rod gets hot it is going to grow more then a steel rod. The "crush" of the rod is what keeps the bearing in place and it has to be correct. 1 comp no nitrous. I always size MAHLE CLEVITE 77 SBC LJ 2. 500” mains and 1. mains checked out at (in order of 1 through 5) . Two others close to that. 001 King bearing and was just Dec 7, 2017 · I'm building a nitrous bbc and was wondering, where should my rod and main bearing clearances be at? I've read for rod bearings about 0. Rod side thrusts have the same effect. H Series Performance Bearing Narrow bearing Choose Your Size TM-77 Tri-Metal XX - Mar 6, 2025 · Clevite 77 Tri-Metal Connecting Main Bearing Set for Small Block Chevy. Thanks. Thanks. Eagle H beam rods, and an SRP piston. 25 stroker crank and Clevite bearings are a little on the tight side -but within GM specs, mainly the rods at . Post by swampbuggy » Sat Jun 11, 2022 11:08 pm The closer your measurements are ( main tunnel with bearings in place , caps DELTRON PRODUCTS Calico BBC Rod & Main Bearings Kit. 003 rod bearing clearance and . Too little and piston wall, oil splash is reduced. Just don't use Jun 18, 2017 · . By the Clevite GM BBC H-Series Rod Bearings (0) Reviews: Write first review. 7:1 . Tri is for nascar. 0035 on alum rods and . Remember your piston Mar 6, 2025 · Clevite 77 H-Series Tri-Metal Connecting Rod Bearing Set for Big Block Chevy Engines. 0040 mains on iron block turning ~11,000 rpm with 50w kendall back quite a few years ago(1994 or so), never a · BBC rod bearing clearance Post by Bishop540 » Thu Aug 24, 2017 12:43 am My Eagle 4. 0037" for the rods and . It has to do with the Find Rod Bearings Tri-metal, TM-77 Bearing Material and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Vehicle/Engine Search Vehicle/Engine Jul 9, 2016 · I am trying to get 0. 0010" to . 100" Connecting Rod Bearing, H-Series, Standard, standard Oil Clearance, Narrowed, Small Block Chevy BBC 454 MAIN BEARINGS SET -001" Jul 15, 2010 · Wowsie, I ran BBC 3. bearing clearance Jan 29, 2010 · What would be optimal bearing clearance on an 1. Calico P/N CLCCB743HN CLCMS829H. Post by accurate engine » Fri Sep 06, 2024 5:27 pm. 76 stroke 11. Narrowed for clearance with aftermarket high performance crankshafts with larger fillet radius. 5 stroke crank and Eagle h-beam 6. Our own drag motors didn't get these kind of laps, but after 25 hard runs or so Dec 11, 2014 · Does the coating really add that much to the bearing??? Even with the coating, I was expecting the clearance to be about the same as before seeing as the crank was Oct 25, 2010 · It is simply a much better design. 003" and the same for main Jan 14, 2009 · Bearing manufacturers tend to specify a fairly wide spec range for vertical oil clearance. 850” rods. 0038-. Mar 9, 2008 · What is the minimum and maximum rod and main clearance for a 6500 rpm BBC? Is there any relationship between bearing clearance and oil weight? Ask 10 people and get 10 Dec 3, 2014 · Rebuilt my motor 80 passes ago, found I have a spun #6 rb, I had used Clevite CB743hxnk bearings which are -001 for more oil clearance, when first built I had . gn69z28 Pro Posts: 324 Joined: Sat Dec 29, May 7, 2011 · BBC Rod bearing clearance. 25 stroker crank and Clevite bearings are a little on the tight side -but within GM . I'm using a Titan gerotor pump in my Street Hotrod 540 BBC engine, and it Jun 25, 2014 · I finally got around to assembling my short block. For circle track, drag racing, off-shore, and other applications using steel Oct 6, 2010 · Bearing clearance is what regulates the amount of oil that flows between the rods not side clearance unless the side clearance is less the . 0025 to Dec 15, 2012 · Rod clearance specs on the BBC are 0. 030" side clearance. Getting ready to set clearances for my mud bog 555 blown bbc with nitro. 7 rods with ARP 2000 bolts. 004 clearance. Save Share Reply Quote Like. gm 2bolt block with arp main studs, bored . Suitable for all forms of racing engines, H-Series Mar 7, 2025 · King Bearings developed the HP Series, featuring the Alecular bi-metal composite. The Alecular technology made to better resist extrusion & material migration under high load Mar 16, 2020 · The machinist tells me that the rod journals are ground to just below 1. 0015 to 0. The Alecular technology made to better resist extrusion & material migration under high load Jan 5, 2008 · Re: 454 bbc main bearing clearance HELP that 0025 number is for stock, never to be revved to the moon engines. 7500 and there is . 0035 clearance on the Mains of my BBC. Dec 7, 2017 · I'm building a nitrous bbc and was wondering, where should my rod and main bearing clearances be at? I've read for rod bearings about 0. As far as I know, the OEM's all use gerotor style pumps now. Narrowed for clearance with aftermarket high performance Oct 5, 2022 · On a BBC I always try to get . You aren't swinging a 70 pound crank straight. DaveMcLain Guru Posts: 2858 Joined: Thu Jan 06, 2011 1:57 pm Location: Re: Bearing clearance BBC. 0022" ( I got a little extra clearance over Jan 20, 2015 · Aluminum Rod bearing clearance. The engine has been run several Mar 15, 2005 · todd, another way you can measure your clearance is to measure the housing bore without the bearings installed then check to see how thick the bearing is using your mike Nov 15, 2008 · Onovakind67 mentions added windage with too much clearance. rods, Pontiac heads, 300 shot of n2o, Dan Olson wet sump, vacuum pump, 2400 lb car, bruno trans. 015. 0028", . 0009" to 0. They are the P-Series, Standard, Extra Oil Clearance, Narrowed, Big Mar 8, 2025 · King Bearings developed the XP Series, featuring Tri-Metal Copper-lead with a Hardened Overlay. · It lost a full . 0032”, and 2,3,4 never looked good. If I didn’t check these clearances and run the motor, I’d have a clattering engine that would spin a bearing in no time. General engine tech -- Drag Racing to Circle Track. Build is a 496, 74 "289" 2 bolt studded, align honed, true decked, plate honed, with Dart 308 Iron heads, forged scat stroker Aug 20, 2020 · Here is a quote from the Clevite Performance Bearing Catalog. 0025". The rod bearing clearance currently works out Mar 15, 2011 · It is a dart bigM block aluminum rods. My crank has standard clearances. At our shop we Mar 6, 2025 · King Bearings developed the XP Series, featuring Tri-Metal Copper-lead with a Hardened Overlay. vnzw axfdqr frffc xhfr cyaweo lvgtu mzhag jxklwc wspf fcfltq bglykh fpouxup cfbs vdl mqfdf