12V tappet VS CR tappet!!!!!!!! - Competition Diesel.Com

REEDSTR · 02-24-2010, 09:39 PM

well Im pricing out new tappets because of the changes Im going to, but when I bought the old 12V tappets they were 10 bucks now they want a ass hurting 20 bucks each out of them now a CR tappet runs about the 10 buck range and Im wondering if its possable to use the CR tappets, and have some extra cash for a box of rubbers and a cheap prostitute..........

j-rod · 02-24-2010, 10:03 PM

Running a 24v or CR tappet in a 12v is a common upgrade.

REEDSTR · 02-24-2010, 10:07 PM

It Was Said To Me By Word Of Mouth That The The Cr Tappets Are Larger And They Would Get In The Way Of Fuel Pump Lobe On The Cam

gotta12v · 02-24-2010, 10:12 PM

24v tappets will fit just fine they are 1.300
cr tappets are 1.500 and will rub on the casting when on the base circle, you can just clearance the side of the pump lobe and not have any problem.

REEDSTR · 02-24-2010, 10:15 PM

Clearence The Pump Lobe ???? I Hope Your Not Talking About Gringing On A Cam???

Muddin_dude06 · 02-25-2010, 08:23 AM

I have some 24v VP tappets to go into my engine when all is said and done. I have a spare set if you want PM me.

Bponci · 02-25-2010, 09:59 AM

Quote:

Originally Posted by Hamilton Cams

24v tappets 1998-2002 are much lighter than the cr tappets and have all of the surface area you would need plus they are only 15-20 grams heavier than the 12v tappets. They are my favorites for the 12v. And the cr tappets will work but I would suggest heavier springs than the 60lbers with them if you are going beyond 4k.

Zach

I couldn't have said it better. I run Zachs valve springs, retainers, locks and pushtubes with 24v tappets and it works great! Thanks for a great product!!

*shortbusdriver* · 02-25-2010, 10:15 AM

Quote:

Originally Posted by gotta12v

24v tappets will fit just fine they are 1.300
cr tappets are 1.500 and will rub on the casting when on the base circle, you can just clearance the side of the pump lobe and not have any problem.

They wont rub, I am running cr lifters along with many others and they do no rub

gotta12v · 02-25-2010, 10:31 AM

they will rub, at least on a ground cam with material removed from the base circle. however it is just slightly and it is the casting at the radius on the fuel pump lobe. it just takes a little clearencing.

easy way to check is turn the engine over with the fuel pump removed, when tappet is on base circle you can see if the tappet is touching the lobe. some dont but some do so saying they will all clear is incorrect.

*shortbusdriver* · 02-25-2010, 11:03 AM

Ive never even heard of anyones tappits rubbing, just the rumor that they rub, oh well

94 12valve · 02-25-2010, 11:16 AM

Quote:

Originally Posted by Bponci

I couldn't have said it better. I run Zachs valve springs, retainers, locks and pushtubes with 24v tappets and it works great! Thanks for a great product!!

Same here, I run his cam as well

12valveAnderson · 02-25-2010, 11:20 AM

Quickserve online deos not mention that cr tappets are backwards compatiable.

GOLDDUSTERS5703 · 02-25-2010, 12:16 PM

helix 2, factory lift pump, and cr tappets i drive it every day no problems.

6BT2500 · 02-25-2010, 05:27 PM

zach is every thingsafe with cr tappets in a 12v with your big stick cam i know there is no fuel pump lobe on it?

cjreckart · 02-25-2010, 07:58 PM

Not To Sound Like A Dumba** , But What Bout Pushrods Will The 12 Valve Pushrods Work With The 24 Valve Tappets.

6BT2500 · 02-27-2010, 08:12 PM

springs and pushrods are my next purchases thanks for the heads up

02-24-2010, 09:39 PM	#1
REEDSTR Name: REEDSTR Title: SHADE TREE TECH Status: Not Here Join Date: Dec 2008 Location: CASPER/WY Member`s Gallery Posts: 53	12V tappet VS CR tappet!!!!!!!! well Im pricing out new tappets because of the changes Im going to, but when I bought the old 12V tappets they were 10 bucks now they want a ass hurting 20 bucks each out of them now a CR tappet runs about the 10 buck range and Im wondering if its possable to use the CR tappets, and have some extra cash for a box of rubbers and a cheap prostitute.......... __________________ 93 DODGE W/D250 STD CAB P PUMPED CR WITH A LUCKY RABBITS FOOT HANGING FROM THE REAR VIEW

02-24-2010, 10:03 PM	#2
j-rod Name: j-rod Title: Up to no good Status: Not Here Join Date: Jun 2008 Location: PA Member`s Gallery Posts: 3,628	Running a 24v or CR tappet in a 12v is a common upgrade. __________________ Jared 14 CC LB 99 QC LB 01 TDI

02-24-2010, 10:07 PM	#3
REEDSTR Name: REEDSTR Title: SHADE TREE TECH Status: Not Here Join Date: Dec 2008 Location: CASPER/WY Member`s Gallery Posts: 53	It Was Said To Me By Word Of Mouth That The The Cr Tappets Are Larger And They Would Get In The Way Of Fuel Pump Lobe On The Cam __________________ 93 DODGE W/D250 STD CAB P PUMPED CR WITH A LUCKY RABBITS FOOT HANGING FROM THE REAR VIEW

02-24-2010, 10:15 PM	#5
REEDSTR Name: REEDSTR Title: SHADE TREE TECH Status: Not Here Join Date: Dec 2008 Location: CASPER/WY Member`s Gallery Posts: 53	Clearence The Pump Lobe ???? I Hope Your Not Talking About Gringing On A Cam??? __________________ 93 DODGE W/D250 STD CAB P PUMPED CR WITH A LUCKY RABBITS FOOT HANGING FROM THE REAR VIEW

02-25-2010, 08:23 AM	#6
Muddin_dude06 Name: Muddin_dude06 Title: ... Status: Not Here Join Date: Sep 2007 Location: Chandler OK Member`s Gallery Posts: 2,541	I have some 24v VP tappets to go into my engine when all is said and done. I have a spare set if you want PM me. __________________ '96 2500 4x4 5sp. 3” Full Long arm lift w/35's ValAir DD Clutch w/ Input DFI 5x.012’s, O-ringed, 625’s Hamilton 178/208, pushrods, PDD street springs, S362sxe/.7WG ‘12 LML crew cab swb 4x4 RC 3.5” lift with 33’s Anarchy tune 5” exhaust w/ Jones 5050XL

02-24-2010, 10:12 PM	#4
gotta12v Name: gotta12v Title: Too Much Time Status: Not Here Join Date: Dec 2006 Location: Fayette MO Member`s Gallery Posts: 435	24v tappets will fit just fine they are 1.300 cr tappets are 1.500 and will rub on the casting when on the base circle, you can just clearance the side of the pump lobe and not have any problem.

02-25-2010, 10:31 AM	#9
gotta12v Name: gotta12v Title: Too Much Time Status: Not Here Join Date: Dec 2006 Location: Fayette MO Member`s Gallery Posts: 435	they will rub, at least on a ground cam with material removed from the base circle. however it is just slightly and it is the casting at the radius on the fuel pump lobe. it just takes a little clearencing. easy way to check is turn the engine over with the fuel pump removed, when tappet is on base circle you can see if the tappet is touching the lobe. some dont but some do so saying they will all clear is incorrect.

02-25-2010, 11:03 AM	#10
shortbusdriver Name: shortbusdriver Title: this guy Status: Not Here Join Date: May 2009 Location: Mayville, WI Member`s Gallery Posts: 2,318	Ive never even heard of anyones tappits rubbing, just the rumor that they rub, oh well __________________ Contagious Diesel http://contagiousdiesel.com/ https://www.facebook.com/Contagious-...7994165231032/

02-25-2010, 11:20 AM	#12
12valveAnderson Name: 12valveAnderson Title: Green Behind the Ears Status: Not Here Join Date: Jun 2009 Location: PA Member`s Gallery Posts: 65	Quickserve online deos not mention that cr tappets are backwards compatiable.

02-25-2010, 12:16 PM	#13
GOLDDUSTERS5703 Name: GOLDDUSTERS5703 Title: Too Much Time Status: Not Here Join Date: Oct 2008 Location: huffman, tx Member`s Gallery Posts: 2,788	helix 2, factory lift pump, and cr tappets i drive it every day no problems. __________________ 1997 CTD2500 "CASPER" PHILIPPIANS 4:13

02-25-2010, 05:27 PM	#14
6BT2500 Name: 6BT2500 Title: hitman Status: Not Here Join Date: Oct 2007 Location: northeast Member`s Gallery Posts: 480	zach is every thingsafe with cr tappets in a 12v with your big stick cam i know there is no fuel pump lobe on it?

02-25-2010, 07:58 PM	#15
cjreckart Name: cjreckart Title: Too Much Time Status: Not Here Join Date: Aug 2008 Member`s Gallery Posts: 255	Not To Sound Like A Dumba** , But What Bout Pushrods Will The 12 Valve Pushrods Work With The 24 Valve Tappets.

02-27-2010, 08:12 PM	#16
6BT2500 Name: 6BT2500 Title: hitman Status: Not Here Join Date: Oct 2007 Location: northeast Member`s Gallery Posts: 480	springs and pushrods are my next purchases thanks for the heads up