Any issues running flat tappet in a tubed smallblock
#2399173
11/06/17 02:26 AM
11/06/17 02:26 AM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
OP
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OP
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Portage,michigan
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Looking at a tubed for roller cam block. Can i run my flat tappet cam without issues? Its a 340 block.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: Any issues running flat tappet in a tubed smallblock
[Re: B3422W5]
#2399178
11/06/17 02:53 AM
11/06/17 02:53 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Washington
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Looking at a tubed for roller cam block. Can i run my flat tappet cam without issues? Its a 340 block. I do it all the time.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Any issues running flat tappet in a tubed smallblock
[Re: madscientist]
#2399310
11/06/17 01:10 PM
11/06/17 01:10 PM
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Joined: Feb 2005
Posts: 20,184 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,184
PA.
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Absolutely but if it is one that has just been done and never run do yourself a favor and double check their work. Make sure that all the holes that need redrilled have been redrilled. I’ve seen guys mess up doing this job.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Any issues running flat tappet in a tubed smallblock
[Re: pittsburghracer]
#2399315
11/06/17 01:19 PM
11/06/17 01:19 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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Pittsburgh I gotta do one. Do you have any tips/caveats (for drilling the main holes out to 5/8), I wanna em straight & not mess up a block.
live every 24 hour block of time like it's your last day on earth
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Re: Any issues running flat tappet in a tubed smallblock
[Re: pittsburghracer]
#2399318
11/06/17 01:23 PM
11/06/17 01:23 PM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
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I Live Here
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OP
I Live Here
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Portage,michigan
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Absolutely but if it is one that has just been done and never run do yourself a favor and double check their work. Make sure that all the holes that need redrilled have been redrilled. I’ve seen guys mess up doing this job. Thanks John Yes its already been done by a reputable shop and been run with a roller previously since done
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: Any issues running flat tappet in a tubed smallblock
[Re: dodger mope]
#2399416
11/06/17 03:58 PM
11/06/17 03:58 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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master
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Washington
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when the block is reamed like the factory tool the reamer it can drift to one side. i drilled a hole in lead end of the reamer and press in a pilot cone with 3 cutouts for chip relief.when the tool goes straight it cuts fast That's a good idea. Since I have a tool post grinder I just turned down the end of my reamer to hole size. Either way will work but I agree, it needs some sort of pilot or you have to be very careful to get it straight. And don't forget what PBR says...make sure all the holes are drilled to size and make sure the tube isn't keeping the lifter from turning.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Any issues running flat tappet in a tubed smallblock
[Re: scottb]
#2399433
11/06/17 04:41 PM
11/06/17 04:41 PM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
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If the block is tubed why not run a roller cam its going to make more power then the flat tappet Just talked to Dwayne, problem is finding springs to fit the rockers. Must be 1.500 OD. Looked around for springs. Howards makes one, but not enough pressure to run anything worth swapping to that would make enough power to pay for springs, pushrods, roller lifters, etc. over my flat tappet. Plenty in 1.550, but those would rub.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: Any issues running flat tappet in a tubed smallblock
[Re: RapidRobert]
#2399628
11/06/17 10:02 PM
11/06/17 10:02 PM
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Joined: Feb 2005
Posts: 20,184 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,184
PA.
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Pittsburgh I gotta do one. Do you have any tips/caveats (for drilling the main holes out to 5/8), I wanna em straight & not mess up a block. No special tricks for me. I actually just bought a new long drill bit from Amazon because I used my old bit for 4 different block and various other jobs. I slowly hand drill around 10 inches deep from the front and rear of the block using lots of cutting fluid. Then I use 2 pieces of soft 1/2 house copper pipe driven in from the front and back. I still have the tool to drive into the lifter holes to dent the copper pipe for lifter clearance. I get out my old direct connection books for a refresher evertime I do a block and will never do another block without tubing it after seeing how much oil comes out of unbushed or untubed lifter bores. I want that oil going to my bearings. If you don’t have the tool to clearance the lifter bores round off an old solid lifter to do the job.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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