going from flat tappet cam to hydraulic roller
Thread Starter
Drifting
Joined: May 2001
Posts: 1,329
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going from flat tappet cam to hydraulic roller
as the title says, thats what I want to do and I was wondering if I can use the same rods I had? I'm going with the 282hr and just want to make sure it'll all fit before I go buy it today.
Drifting
Joined: Apr 2002
Posts: 1,743
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From: Stockton Ca
Re: going from flat tappet cam to hydraulic roller (Lohkay)
You will probably need a complete retrofit kit. Your valve lift will be so much more that new springs and pushrods will be needed. You might as well get all new. The kit will save money in the long run. Who wants to put old valvetrain on new engine? That is a big cam, what else will you run w/it?
Thread Starter
Drifting
Joined: May 2001
Posts: 1,329
Likes: 12
Re: going from flat tappet cam to hydraulic roller (Taijutsu)
humm...the only reason I'd see why I'd need new pushrods would be because the roller lifters are taller than the flat tappet. but now you're saying its because I'd have more valve lift? Can you please explain why it require new pushrods?
As for the cam, you are right...dunno why I said the 282. I'll be going with the 260 series...I tried the 266 in dyno2000 and it would fit perfectly. Dunno if its available tho...but around that would do fine.
As for the cam, you are right...dunno why I said the 282. I'll be going with the 260 series...I tried the 266 in dyno2000 and it would fit perfectly. Dunno if its available tho...but around that would do fine.
Drifting
Joined: Apr 2002
Posts: 1,743
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From: Stockton Ca
Re: going from flat tappet cam to hydraulic roller (Lohkay)
I'm sorry for not being clear. You are right about pushrods. The springs will need to be changed due to increased lift. I recomend 1.6 rr to get even more lift from mild cam. I am running a 218-224 HR w/1.6rr. I have so much TQ that I seldom need to rev engine above 3500. I wanted BB power in SB package. I got what I wanted and then some. Just make sure you match the rest of your combo and you won't be sorry.
Le Mans Master
Joined: Mar 1999
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From: delmont pa
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Re: going from flat tappet cam to hydraulic roller (Lohkay)
you will have trouble finding aftermarket hyd roller tappets as they have been on back order for months unless things have changed lately. :chevy
[Modified by clem zahrobsky, 8:06 PM 6/25/2002]
[Modified by clem zahrobsky, 8:06 PM 6/25/2002]
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: going from flat tappet cam to hydraulic roller (Lohkay)
Lohkay - maybe call
http://www.martelbros.com Your going to need retrofit H-rollers with matching length pushrods and springs. It's not a big deal to replace springs without removing the heads. I would also recommend the larger ARP 7/16th taller rocker studs. For rockers I like the steel versions
http://www.martelbros.com Your going to need retrofit H-rollers with matching length pushrods and springs. It's not a big deal to replace springs without removing the heads. I would also recommend the larger ARP 7/16th taller rocker studs. For rockers I like the steel versions
Thread Starter
Drifting
Joined: May 2001
Posts: 1,329
Likes: 12
Re: going from flat tappet cam to hydraulic roller (gkull)
yeah thx. I asked around and clem was right...all back order and no where to be found. so I'm gonna stick with my flat tappets.....unless I go with solid roller? or is it the same for those?
