Tomei cam question, can i use poncams with solid lifters?

[xris]

Hi Guys.

My head specialist has advised me if i want to make descent power i should convert to solid lifters, thats fine but. i have a set of tomei 260 degree 8.8mm lift cams. am i able to use these lobe type cams with a solid lifter conversion? (i already have the valve springs for the solid lifters just need to get the shims and solid type lifters.)

If this is not possible to use these does anyone want to buy a set of drop in replacment tomei cams for the ca18det $600? brand new still in the box.

Thanks

Neil

[cortina-mk1]

those cams are for "hydraulic only' lifters/buckets.

so no you cannot use thos cams with solids

are you sure they are 260 degree ?

[niscort]

jewels, whats the reasoning behind this? I was under the impression that the high lift cams needed to have solid buckets due to the cam profile ramping but the normal lift cams would cause no drama in connection with the solid buckets... would the shim be required to be large to fill the gap as such? or something else?

One side question for you... where does the cams gets its lubrication when converting to solid? as the oil is no longer directed to the cam lobe through the hla.

[xris]

yes i am sure they are 260 degree tomei cams. 8.8mm of lift. i ordered these specifically from greenline.jp has on the end of the box the size etc.

[CT]

Solids and hydraulics use different ramp angles at the same cam duration/lift so yep -they shouldn't be mixed. Also, HLAs require a different radius than solids. You also need to be careful of shim over bucket solids as higher lifts will cause the shim to pop out - shim under buckets are the way to go for big lifts. How do I know this? Well, due to the lift of my race car cams (matched to the head flow), we had to convert HLAs to solids - in effect making it a shim under bucket lifter as the cam was wiping the shims out of the shim over bucket lifters. We custom made the shims to convert the HLAs - very cool stuff.

[IMOA]

The tomei solid lifters for CA's/RB's are shm under so should be no drama there. What I can't understand is why someone would go through the hassle/expense of converting HLA to solid then run lash type cams. Just get the solid type procams! If you already have the cams then converting to solid will make 0 difference to power, all it will do is make your head clattery and require maintenance to maintain the clearances. There seems to be a bit of a communication breakdown between xris and the so called "head specialist"

[xris]

I already have the cams. He suggested i go solid. i am asking the question am i able to use the pon cams that i have if i convert to solid.

There is no communication breakdown between me and head tech he just said id suggest you go solid. so i asked the question on here can i use the hla cams with a solid setup.

What do people on here suggest? just stick with the HLA cams with upgraded heavy duty tomei springs? or completly change this to a solid lifter, tomei valve springs and solid cams?

[xris]

just to clarify, i have all the bits and pieces (head in bits, new cams, new valve springs, new valves, etc) and a new head is being built. this is not just an upgrade the head is being built from scratch.

[CT]

I'd only convert to solids if planning high RPM - my redline is 8k but was built for 8.5k. Other than that I would not have bothered. You are only building a street engine aren't you? Solids are better for high rpm horsepower but require more maintenance than HLAs.

[cortina-mk1]

if the cams are 260 8.8 then there are hydraulic type cams and cannot be used with a solid lifter.

tomei do make a 260 solid lifter camshaft but it has more lift and sometimes head modification is required for clearance

http://www.tomei-p.co.jp/_2003web-ca...fter_rset.html

you can convert a head/lifters to suit solid camshaft but you cannot make a hydraulic cam into a solid cam or vice-versa (well it can be done by welding/regrinding etc ) but i would not do that with brand new tomei cams

perhaps http://tighecams.com.au/ ?

maintance on a solid camshaft .....individual shims have to be used to suit the required clearance on each valve very time consuming to setup but it can be done

i may be interested in your cams BTW

i would suggest for your application to keep with hydralulic buckets instead of going solid. cheaper for starters

[niscort]

Sorry for the bum steer elsewhere xris.

Can anyone explain how the oil gets to the cam lobes when converting to solids?

[xris]

um...no sorry niscort thats why im taking it to a head specialist.

the car is driven on both track and street (was on the track lastnight :D)

ive pretty much sold the cams (deposit is going into my account this week sometime).

I had another talk to Michael at head tech. he has advised me on 270 degree 9.25mm of lift solid type cams. Hes suggested i get a package deal so that i know everything is going to go together. so im doing abit of research into this to see what packages i can get. im currently looking at the tomei website. any other suggestions?