91RS5spd

This is the cam 224 / 230, .502 / .510 112 LSA

Now with buying the beefed up valve train, will this cam fit in a 85 lb9 motor and work?

I don't know if the lift is too much for the motor so I wanted to ask you guys. Thanks!

CamaroJ24

It depends on the engine, what year is the engine itself? after 86 the heads got a little bit weaker and might not be able to handle it, however if the heads can not handle it, you can always search junk yards for other stronger heads, but again after 86 there were only about 2 or 3 differnt types of heads that were made for this engines while 86 and previous had a whole lot of differnt heads that fit it.

D's89IROCZ

I think you will need headwork to make it "fit" . get the heads ported for sure. Or you won't see the gians you want.

1MeanZ

iTrader: (9)

That is a HUGE cam for a TPI 305. Assuming you will be using TPI components, a 305 will be a complete turd with that much cam. That much cam in a 305 might work with a set of ported heads, lose converter, 4.10 gears and a 650cfm carb. My cam is considered borderline too large for a flat tappet cam in a TPI 305, it idles pretty rough but had good midrange power. See the stats in the sig.

91RS5spd

LMAO,

I know it is a huge cam for the engine, This might sound bad but I want to have a NASTY earth turning cam loop to the idle, I really don't care what it does to improve preformance. I have all the valve train already for this cam and will add a TPIS big mouth base and LTR to it along with a upgraded fule system and computer tunning from TPIS.

I just want to know, will this cam fit with out the pistons hitting the valves, and will this cam work from day to day with out damaging the engine. Pretty much, is this cam mechanicaly safe?

To answere on of the questions, it is a 1985 IROC-Z

cheese_kake

Yes, but you will have to do ALOT of tuning with your prom. 112* LSA will work good with the computer though. Is it a hydraulic roller ??

Guest

You are likely going to run into lift issues with the heads, retainer hitting the guide.

phoenix305

yeah the spring seats are going to have to be milled way down and you will need new springs for them if you don't already have them. Stock heads can only take up to about a .480 lift.

Chevyguy496

Whats the point of a earth turning lope when you can't back it up? Thats a good sized cam for a 350, the 305 will be a dog. No low end power. It'll make lots of noise and be slow as hell. You could...say, check the piston to valve clearance yourself?

joejoe

iTrader: (1)

Pressed in rocker arm studs will not work with that cam.
You will have to use screwed in rocker arm studs.

Drac0nic

What do you guys think about the Summit 1103 cam? (Specs below) My specs are 3.42s, stock converter (gonna get an S-10 converter probably) 1986 305 CID with ported 416 heads, ported stock intake and megasquirt ECM with 30# injectors in the intake. With Z28 springs would I be OK to run this, or am I barking up the wrong tree? I want something that's fairly easy to tune with the MS, being a novice at it.


Basic Operating RPM Range: 2,000-4,500 RPM
Intake Duration at 050 inch Lift: 214
Exhaust Duration at 050 inch Lift: 224
Duration at 050 inch Lift: 214 int./224 exh.
Advertised Intake Duration: 272
Advertised Exhaust Duration: 282
Advertised Duration: 272 int./282 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.442 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
Valve Lift with Factory Rocker Arm Ratio: 0.442 int./0.465 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.

ED:1meanz, what kind of vacuum are you pulling at idle btw?

1MeanZ

iTrader: (9)

As you probably noticed that is the exact same cam I am running and you can see my results in the sig. I have never had a vaccum gage on mine, and I am running the stock chip so it idles at about 800rpm. If the engine is at idle the brakes work well under normal driving, but with the engine idling if you need to lay hard on the brakes forget it, you just dont have enough power assist. Now this is rarely a problem because I dont usually push the clutch in until I am almost stopped, so I have tons of braking force at any speed above about 5-10 mph. Below 5-10 mph the brakes act normal unless you really try to push them super hard and even then it still stops pretty good. So to make a long story short I would say the vaccum is borderline, but good enough.

IROC315

iTrader: (9)

Although I have not driven it for a long time, that's the cam I had in my 305 powered Iroc. It was the perfect cam for my combo I think. Street manners were excellent and it sounded pretty mean. I had an auto with a 2600 stall converter. My brakes were pretty decent.

gmgod

I think I would prefer the comp xe256, though I think the cam listed above is sofakingdom's favorite grind.

3rdgenZ

iTrader: (1)

if you can accept the lift why not get the duration that maches you setup.
comp has a cam that something like 210/220 @.5 with .500/.510. a cam like that will give you the lopey sound your going for and give you great power.


just my two.