solid lifter options

[bentvalves]

zerothread/289739

I knew about vg30 lifters being compatible, but didnt know RB 20/25 lifters fell under the same part number.

Good to know I suppose, especially since I have some 10.25 lift cams kicking around dying to be spun again. 10.25's are prolly gonna make for a super laggy...or should I say peaky setup though. Whats the highest lift cam you guys have run, and what do you have to say about them.

the cams I have stored are 10.25 268's.

Wonder if they'd be worth the hassle of solid lifters?

suggestions welcome.

Greg

[Chris859]

Well, are they solid lift cams? or a hydraulic profile? Unless they are solid lift cams, no they are not worth spending the money on solid lifters.

[nismoplsr]

10.25mm lift cams will not physically fit in the head if they are on the same base circle as the stock cams. With my HKS 8.8mm lift there is less than .002" clearance between the peak of the lobe and the aluminum of the head.

So am i going to assume that they are made for solid lifters. Which i would rather do than mill out clearances for the cams in the head. I think Dee has done this before though.

Anyways, you should deff get some solid lifters and let those babies roar!

[float_6969]

Even with the solids, you've still got to mill the head to clear them. They knock the base circle down so it's not as much, but there still isn't enough room in there for them.

[bentvalves]

^ what he said.

Im just not sure If the results will be worth all the money and effort, and will a 2871R be a good companion for these cams.

And If Im going to spin it to 9k, will stock rods with ARP rod bolts be up to the task?

[float_6969]

It shouldn't be too bad, maybe even on the small side.

You can be the guinea pig if you like, but if it were my motor, I wouldn't screw around ad 9K.

[dattodude]

I run 270/9.25 lift tomei (smaller base circle 'solid lifter' cams). No machining required for them.

I didn't measure the 9.25mm cams for lobe to head clearance, to know if the 10.25 ones would be a fit straight in.

[kapower06]

I really think that if you are going to try for 9k rpm you shouldn't even ask is stock rods are up to task, even with arp bolts. Get some crowers or pauters.they both include larger than standard ARP bolts.

Get away from t2 turbos. a t3 or even t4, if properly sized will only spool a couple hundred rpm later than a gt2871r, they also run cooler and need less boost to flow the same cfm. I would guess that any t2 series will start to choke way before 9k rpm. But i haven't seen any test so who knows maybe one will, but I doubt it.

just my .02

[bentvalves]

agreed, except for the part where you say get away from stock rods.

I think they're quite up to the task, they handle 8k no problem so whats another 1k.

[bentvalves]

dattotude, what engine did you source solid lifters from?

and I know some of you are laughing at the thought of a stock rod spinning 9k, but if its polished chrome and held together with ARP bolts I really dont think I'll have any problems.

with my limiter set at 7600, I find it hard to not hammer it all the time. If rev limit is set at 9k, I'll be able to hover below limiter at all times. Power FC cuts fuel to all cylinders, its a rather hard cut....sounds awsome cause it basically sounds like a gunshot, but I know my pistons rings dont agree.

I use it all the time at 2 am to wake friends up as I rip past their houses on my way home from 2nd shift dyno fabrication here in NH His fathers exact words "what the hell is that crazy sound his car makes, sounds like gunfire"?

[boost_boy]

Why is there is such a wicked obsession to rev a CA18 to 9000 rpm? That much rpm is rather harsh on all rotating components and besides, you're one hiccup away from disaster. I say, learn how to create power with the stock components before skipping grades because there's so much more associated with adding solid lifters. And for the record, the stock rods can very well withstand the stress associated with higher rpm; and I'm pretty sure the DET rods are beefier than that of B series honda DOHC engine. Have fun toying with this idea .

Dee

[bentvalves]

Ahhh i was waiting for you Dee, and I did explain my reasons for a 9k limit.

I have everything needed minus solid lifters and rod bolts at this point.

I know of a local sr20 with its gay inferior rocker arm setup revving for a 9k limiter, It never hits the limiter.....thats what Im after.

You make it sound like the most impossible thing to do, but I bet with some uprated springs the stock hydro lifters would be up to the task with some mild 256 cams.

If I said something like 10k, than Id expect that kind of response from you. C'mon, you should know how strong these engines are.....8:1 pistons to boot, that gives me cushion for pushin right there.


Modified by ks13 at 8:40 PM 11/22/2007

[ch187]

just wanted to add..i hope your not cutting fuel to all your cylinders at 7600rpm. i think you mean spark. i just wanted to clarify that before you go revving old bessy to 9k.

[bentvalves]

power FC is a hard cut fuel cut rev limit.

there is no ignition cut except for on the RARE drag race versions of power fc, they have a name I cant think of it.

Greg

[ch187]

yeah come to think of it, thats why people use the bee r with it.. heh. if its safe why the hell not. i know what your talking about though, its ridiculously freakin loud

[boost_boy]

Ahhh i was waiting for you Dee, and I did explain my reasons for a 9k limit.

I have everything needed minus solid lifters and rod bolts at this point.

I know of a local sr20 with its gay inferior rocker arm setup revving for a 9k limiter, It never hits the limiter.....thats what Im after.

You make it sound like the most impossible thing to do, but I bet with some uprated springs the stock hydro lifters would be up to the task with some mild 256 cams.

If I said something like 10k, than Id expect that kind of response from you. C'mon, you should know how strong these engines are.....8:1 pistons to boot, that gives me cushion for pushin right there.

Modified by ks13 at 8:40 PM 11/22/2007

In response to you my friend, good luck with that project!

Dee

[bentvalves]

no doubt, I'll let you know how awsome it sounds when its done.

[sldwys]

I have myself some Tomei 272 dur 10.25 lift in/ex cams for my Ca, Coupled with Solid light weight tomei lifters, Tomei shims, Tomei Valve springs. New over sized valves, Tomei camgears, Tomei metal headgasket, Eagle rods and CP pistons.... Head ported to hell and i also had to shave some of the head away to get the cams to rotate around without getting any contact.... Garrett gt3540 Duall BB turbo, W/G, Alloy intake manifold, q45 T/b....

I reckon i could hit 10,000rpm..... well... maybe 9500 rpm anyway

[boost_boy]

I have myself some Tomei 272 dur 10.25 lift in/ex cams for my Ca, Coupled with Solid light weight tomei lifters, Tomei shims, Tomei Valve springs. New over sized valves, Tomei camgears, Tomei metal headgasket, Eagle rods and CP pistons.... Head ported to hell and i also had to shave some of the head away to get the cams to rotate around without getting any contact.... Garrett gt3540 Duall BB turbo, W/G, Alloy intake manifold, q45 T/b....

I reckon i could hit 10,000rpm..... well... maybe 9500 rpm anyway

Didn't know Eagle makes rods for the CA .

Dee

[bentvalves]

I have myself some Tomei 272 dur 10.25 lift in/ex cams for my Ca, Coupled with Solid light weight tomei lifters, Tomei shims, Tomei Valve springs. New over sized valves, Tomei camgears, Tomei metal headgasket, Eagle rods and CP pistons.... Head ported to hell and i also had to shave some of the head away to get the cams to rotate around without getting any contact.... Garrett gt3540 Duall BB turbo, W/G, Alloy intake manifold, q45 T/b....

I reckon i could hit 10,000rpm..... well... maybe 9500 rpm anyway

Tomei sells those lifter shims in packages of twelve.....all different sizes.

How did your lifters end up measuring out? Did you have to buy a whole **** load of those shims in different thicknesses, or was only one size thickness shim needed?

Greg

p.s. whats your limiter set at?

[sldwys]

boost_boy: You are correct they do not make them, But if you get a custom set done they do Same with CP Pistons they do not make a on shelf ca18det forged piston.

ks13: I got the thickest set of shims available 2.3mm, And we just machined the thickness down to suit, Also had to get the other 4 shims made up... quite stupid as to why they only make a set of 12 huh...

Engine is not complete yet so no limiter

[bentvalves]

I wonder if the shims are cryo'd or hardfaced, Id be a bit worried about that.

Keep us updated, when do you expect it to be done?

Greg

[niscort]

the tomei shim pack is a test pack of 12. then you order a variety at the correct thicknesses required. you will never need 12 the same size any how.

and again, tomei solids have a reduced base circle... the 10.25 cams actually only have an extra .25 (10thou) extra radius than the standard stock cam shaft... its simple math really.

are factory tolerances that low to rotating parts?