Author
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Topic: Possible engine for Dragster
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Dave_C Gearhead Posts: 666 From: Gadsden, Al Registered: Aug 99
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posted 09-03-2002 05:49 PM
What do you guys think? BLOCK: 1968 C8VE casting. Engine Systems 4 bolt main cap conversion done by USA Racing in Hou,TX. Block is .080 with hard block (have sonic test sheet available). Block has bushed passenger side lifter bores (done by Engine Systems). Block has restricted cam feed holes and has been bored with torque plates, lined honed and squared. CRANKSHAFT: Scat cast steel 4.500 stroke which has been internally balanced (6 pieces of heavy metal) RODS: Eagle ESP H-beams BBC 6.800 PISTONS: Probe .080 custom forged flat tops (12.7:1 w/80cc chambers). Speed Pro file fits. CAMSHAFT: Cam Research custom grind solid roller ADV dur. 308/316 ---.050 275/280---lift .770I/.770E----110 lobe TIMING CHAIN: FRP M-6268-A460 (all steel) OIL PAN: Moroso 20620 w/24509 pickup using M84 DHV pump w/FRP oil drive shaft. ROLLER LIFTERS: MPG Head Service solid rollers PUSHRODS: Jesel 3/8 chromemoly BALANCER: FRP M-6316-A460 (neutral) ROCKER ARMS: Harland Sharp BBF CYLINDER HEADS: Blue Thunder 80cc (B) heads (BBC exhaust port). Purchased new in summer of 2000. Heads ported by MPG Head Service (Englewood, CO). Flow #'s are 380/265. Valves are Ferrea competition plus 2.300/1.800. Vasco Jet springs (220 lbs seat, 700lbs open) with titanium retainers and Probe stud girdle. These heads are not milled and have absolutly not been damaged in any way. DISTRIBUTOR: MSD 8580 w/MSD crank trigger and Taylor 409 wires. I can get this engine for much less than it would cost to build. He has all reciepts for parts and labor. It has about 25 1/8 mile and 10 1/4 mile passes on it. He had it on gas with a dominator. I would buy it without carb, intake, water pump or door car headers. My set up would be a Victor 460 intake with a Flying Toilet alcohol injection system. Hooker 2 1/8 dragster headers. Gear is a 4.10 w 33" tall tires. 1.76 1st gear glide, converter to be determined. Car should weigh around 1850 with driver. Opinions? Personally I think it might be a little overcammed. Might back off little on the cam so the springs would last longer. Later, David Cole
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Moneymaker Administrator Posts: 18704 From: Lyons, IL, USA Registered: May 99
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posted 09-03-2002 06:01 PM
I was smiling until I got to the Probe piston part. ------------------ Alex Denysenko Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA/MCA member NHRA and IHRA SS/LA National Record Holder '00, '01, & '02 Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 Part time secret agent license #0089 Professional Manwhore The Barry of BarrysGrrl Quote: "I never met a magazine mechanic I liked."
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kid vishus Gearhead Posts: 3894 From: middle of NC Registered: Oct 2000
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posted 09-03-2002 08:25 PM
I would think the duration numbers of the cam would be fine especially since the motor has decent heads and a "few" cubic inches, but the lift might be slight overkill for a bracket car. Maybe put some shorter ratio rocker arms on it to take some lift away. Might be cheaper than buying a new camshaft. But, it mught be 6 of one, half a dozen of the other. All in all, it should run real good in the digger.
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Dave_C Gearhead Posts: 666 From: Gadsden, Al Registered: Aug 99
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posted 09-03-2002 08:34 PM
quote: Originally posted by kid vishus: a "few" cubic inches.
Oh yeah, forgot to mention. That bore and stroke equals 557 ci.
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steve'66 Gearhead Posts: 5659 From: Sonoma,CA,USA Registered: Mar 2000
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posted 09-03-2002 10:10 PM
Dave,That sounds like a winner to me. SteveW
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kid vishus Gearhead Posts: 3894 From: middle of NC Registered: Oct 2000
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posted 09-03-2002 10:19 PM
If it didnt run in the 4.80 range, I would be terribly suprised.
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jsracingbbf Gearhead Posts: 1217 From: Batesville,MS. , U.S.A. Registered: Mar 2002
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posted 09-03-2002 11:41 PM
I think some where between 710 to 740 lift is about right, although that motor has some good heads. sounds great try it Jerry
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jkilroy Gearhead Posts: 1636 From: Vicksburg, MS Registered: Dec 99
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posted 09-04-2002 08:57 AM
That is not over-cammed. 557's like LARGE cams. I know of several guys running cams that large or larger, in regularly street driver BBF's. I talking, they idle in traffic in drive with the brake on no problem.------------------ Jay Kilroy 68' Fastback GT 390 "No such thing as a cam thats too big"
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lawless Gearhead Posts: 236 From: Richmond, VA Registered: Aug 2000
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posted 09-04-2002 05:08 PM
I wouldn't trust ANYTHING from Cam Research/MPG Head Service!!!! ------------------ 64 Fairlane Hard top 289 4-speed -- SOLD to a good home.
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Dave_C Gearhead Posts: 666 From: Gadsden, Al Registered: Aug 99
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posted 09-04-2002 07:09 PM
quote: Originally posted by lawless: I wouldn't trust ANYTHING from Cam Research/MPG Head Service!!!!
Why? Tell us more. Later, David Cole
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F551 Gearhead Posts: 157 From: Manitoba, Canada Registered: Nov 2000
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posted 09-05-2002 06:34 PM
Sounds fast!That's the same rod we use. After the first season there were some marks from the caps moving, also a friend with a BBC had a bolt related rod failure. Eagle advised us to upgrade to the L19 bolts - no problem since (now 3rd season with L19 bolts). Can't understand why they don't sell the rods with the weaker bolts (8740 I think)! ------------------ Fred 68 Mustang 500CID/Powerglide - "No Tubs" 86 Mustang GT Cobra
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lawless Gearhead Posts: 236 From: Richmond, VA Registered: Aug 2000
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posted 09-06-2002 10:31 AM
quote: Originally posted by Dave_C: Why? Tell us more.Later, David Cole
Without going into specifics, Quality Control is severly lacking. I do not make a habit out of bashing people. They're nice guys and mean well, but my experience with them is far from positive. I know that you are about to sink a serious chunk of change into this motor. All I can say is buyer beware when dealing with stuff from MPG/Cam Research. chris
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Ryan Wilke Gearhead Posts: 1115 From: Stanton, Michigan 49707 Registered: Oct 2000
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posted 09-06-2002 05:00 PM
quote: Originally posted by F551: ...Eagle advised us to upgrade to the L19 bolts - no problem since... Can't understand why they don't sell the rods with the weaker bolts (8740 I think)!
Fred, Am I missing your grin? I thought Eagle DOES sell their rods with the ARP 8740 rod bolts? I'VE got Eagle 6.800" H-beams lying on my bench with the ARP 8740 rod bolts... If you were me, would you change them out NOW? Ryan
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Ryan Wilke Gearhead Posts: 1115 From: Stanton, Michigan 49707 Registered: Oct 2000
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posted 09-06-2002 05:20 PM
quote: Originally posted by F551: ...Eagle advised us to upgrade to the L19 bolts - no problem since... Can't understand why they don't sell the rods with the weaker bolts (8740 I think)!
Fred, --- Am I missing your grin? I'VE got brand-new Eagle 6.800" H-beams lying on my bench with the ARP 8740 rod bolts installed in them... If you were me, would you change them out NOW? Ryan
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F551 Gearhead Posts: 157 From: Manitoba, Canada Registered: Nov 2000
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posted 09-06-2002 07:44 PM
Ryan: I goofed - should have been "Can't understand why they sell the rods with the weaker bolts (8740 I think)!"Yes I would get the L19 bolts, after getting them the bearings and caps look good. I think you have to get the bolts direct from Eagle. First a friend blew up his (Eagle H beam rodded)BBC from a rod bolt failure - then we saw the "caps walking" on our rods when we freshened the motor, my brother called Eagle - L19 bolts was their recomendation. We tension the bolts by stretch - made a gage with a dial indicator.
------------------ Fred 68 Mustang 500CID/Powerglide - "No Tubs" 86 Mustang GT Cobra
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Ryan Wilke Gearhead Posts: 1115 From: Stanton, Michigan 49707 Registered: Oct 2000
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posted 09-09-2002 04:09 PM
10-4, Fred. And Thanks! I'll see how much my machine shop will charge me to take out the ARP 8740 rod-bolts & then press in the L-19 bolts...your first-hand experiences are enough for me to make the change NOW - before I put them in the engine! Thanks again! Ryan
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CometGT1974 Gearhead Posts: 133 From: Asheville, NC USA Registered: Jan 2002
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posted 09-10-2002 11:37 AM
Just curious as to why the negative opinion about probe pistons???
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