Cam Question - Page 2

Rare4thgens · #11 (**permalink**) 04-20-2005, 02:28 PM

Anytime and good thinkin. You don't want to have to go back into it after a short time and that is what will most likely happen with the amount of miles on the engine. You are just going to want to drive it. '[]= Oh yeah, you must invest in a nice high flow oil pump. Cheap insurance on that part. You really want everything in good shape. Good luck with it. :smt023

Ta Jay · #12 (**permalink**) 04-23-2005, 03:21 PM

very good points 4thgen. sounds like u kno quite a bit :smt045

Rare4thgens · #13 (**permalink**) 04-25-2005, 03:05 PM

Thanks :smt023 but I don't think I know enough. I have just done too many cams for my own good. Yeah uh, Crane flat tappets suck a big donkey di...

chuckspeed · #14 (**permalink**) 04-25-2005, 04:24 PM

Quote:

Originally Posted by Rare4thgens

Thanks :smt023 but I don't think I know enough. I have just done too many cams for my own good. Yeah uh, Crane flat tappets suck a big donkey di...

I'm pretty sure the '89 has a roller rocker motor. If so, then the swappie is fairly straightforward. If not (flat tappets), then you ALWAYS want to swap in a set of fresh tappets, as used tappets will wipe out a fresh cam more often than not. This has to do with the mating surfaces of the cam and tappet; once a tappet has 'mated' to a cam the wear pattern can kill a fresh cam in less than 20 minutes.

On the same subject, it's damned difficult to switch from one type of cam to the other, and you CANNOT use a roller rocker cam with flat tappets nor can you use a flat tappet cam with roller rockers. In addition, a mechanical lifter can cannot be used with hydraulic lifters.

Depending on the cam profile and lift, you can re-use the stocker springs. The only problem with this is you'd be looking at a very mild cam upgrade; perhaps one step above the stock lift/duration. The good news is you prolly don't want to get too wild a cam on a street motor - get too big an overlap and you'll actually slow the car down.

JoeliusZ28 · #15 (**permalink**) 04-30-2005, 01:14 AM

Quote:

Originally Posted by Rare4thgens

Anytime and good thinkin. You don't want to have to go back into it after a short time and that is what will most likely happen with the amount of miles on the engine. You are just going to want to drive it. '[]= Oh yeah, you must invest in a nice high flow oil pump. Cheap insurance on that part. You really want everything in good shape. Good luck with it. :smt023

is the high flow oil pump something that is TPI specific, or would i want to do one of those if i did h/c on my LT1? Just curious, cause ive never heard that before.

Rare4thgens · #16 (**permalink**) 05-01-2005, 02:21 AM

Quote:

Originally Posted by JoeliusZ28

Quote:

Originally Posted by Rare4thgens

Anytime and good thinkin. You don't want to have to go back into it after a short time and that is what will most likely happen with the amount of miles on the engine. You are just going to want to drive it. '[]= Oh yeah, you must invest in a nice high flow oil pump. Cheap insurance on that part. You really want everything in good shape. Good luck with it. :smt023

is the high flow oil pump something that is TPI specific, or would i want to do one of those if i did h/c on my LT1? Just curious, cause ive never heard that before.

It is always a critical thing to add a high flow pump when you put a higher lift cam in because of the added stress it puts on things. The only big change in SBCs what with the LS1, but you basically have a series 1 engine so it might be the exact same as any older SBC (Small Block Chevy). Don't quote me since I have never worked on one. Check in a parts catalog like Summit or Jegs or do some searches online for TPI info. I know F-body.org has a lot of technical articles with illustrations and all that might be really helpful to yah. Hope this helped.

Windsor377 · #17 (**permalink**) 06-11-2005, 08:39 PM

Didn't completely read all the other posts, but the question can have a lot of answers depending on the cam. These days the engine ecu is easily confused by "good" cams. What is your combination and what cam are you looking at?

http://mysite.verizon.net/vze7umdz/

If you are dead serious about competition, I can put you in touch with my cam grinder.

White Phoenix · #18 (**permalink**) 06-12-2005, 03:34 AM

you have a roller engine....thats why alot of the 305 and 350 TPI's (more 305's) swap in a LT1 cam, heads and intake...if your doing a cam plan to do the lifters (stock replacements or better because you got 112k), hardened pushrods, springs, spring seats, valve locks, roller rockers, new gaskets, and such...yes it is expensive but its worth it in the end...oh and dont go small the first time or you will regret all the money put into little power... :smt077

ChevyGSX · #19 (**permalink**) 07-19-2005, 11:16 PM

rar4thgen, I know how to do all taht stuff to the valve train, exept the part with not having the valves fall in the cylinder. I have an air compressor, but how do i use it to do that ?

:smt045 i am hopefully going to put a small solid lifter cam in by the end of the summer, and if i don't haave to take the heads off i wont.

thanks and sorry if i got too off topic.

pman · #20 (**permalink**) 07-20-2005, 12:18 AM

Quote:

I have an air compressor, but how do i use it to do that ?

I believe hes referring to filling the cylinder with air by use of the spark plug hole to keep the valves up.

Also when changing a cam if the base circle on the new cam changes from the stock you may need different length pushrods .