needles

this is a stock cam coming out of a 92' L98
going into a bone stock 87' LB9

any do's and dont's with this setup i'm thinking of? will i have to worry about getting a chip,or is it clear sailing?

i did a few searches,but the search works so good it picks up everything.

1MeanZ

iTrader: (9)

as many will tell you, GM used the same cam in the 305s and 350s starting in 90 or 91, dont remember for sure. anyway, as long as your 305 currently has a roller cam (it should it is an 87) you should have no problems, an L98 cam is a great cam for a mild 305, you shouldnt have any problems with the chip either.

DuronClocker

iTrader: (1)

If you have a 5spd, don't bother because its the same cam.

If you have an automatic however, it will be worth roughly 25HP.

That might sound great and everything...but if that gives you an instant 25HP...think what a mild aftermarket cam would do for you..

Grim Reaper

Also, check the specs. The 90-92 L98 cam is not the best cam that came in the L98 IMO. I am not certain what's in the 87, but the 88-89 L98 cam has a bit more duration (and a hair more lift). But it has a wider LSA. But I think that I would rather have the 88-89 L98 cam than the 90-92 L98 cam.

needles

thank's alot guys. appreciate the feedback.

i'm probably just going to go with something aftermarket. i just have no clue what i'm searching for when it comes to cams.

Jim85IROC

iTrader: (2)

Just keep in mind that it's very easy to over-cam a TPI motor. There are certainly aftermarket cams that will provide a higher power level than the L98 cam, but on a 305 it's going to be very easy to over-do it. I really wouldn't go with a cam that's too much more agressive than the L98 cam on a 305.

Tibo

iTrader: (15)

I thought that after 90 the cams were the same but the 350s had more lift?

mystikkal_69

iTrader: (2)

stock lt1 cams work very nicely in 305's

1MeanZ

iTrader: (9)

Jim85IROC, i hear what you are saying for sure, but some food for further discussion........

when i installed my 214/224 cam in my 305 it was totally stock except for headers. with the headers and cam it ran a 14.8 @ 93mph. it needed a converter really bad, it wouldnt even spin the tires unless i held the brakes. against other stock and mild l98 and lb9 cars i raced i would just pull away once i got to about 2200rpm. my buddies L98 GTA would pull a fender on me every time off the line but by the end of first gear his nose was at my door handle and it was all over from there. against a number of LB9 cars around here i would get off the line with them, then just drive away. overcammed? maybe so, i suppose it depends on the definition of overcammed. yes the car needed a converter, but it ran pretty good even without one.

now the car has a 2800 stall vigilante converter and i think it runs pretty decent for what it is. this cam works very well with my converter, could it still be overcammed? possibly.

i guess the point of all this is to simply state that as long as you dont go over 212 degrees duration, the engine should work well with the stock converter. and if someone with a looser converter runs a slightly larger cam in their 305, i think that would work well too. what is overcammed? where do you draw the line? as long as the cam works ok with the rest of the car i would say it is ok. but i think overall you can run a little larger cam than most people think in a 305 and still have a strong runner.

Chris89GTA

iTrader: (2)

IMO even if its a slightly better cam, its not big enough to warrent the time and effort to me... Go w/ an aftermarket cam and be happy...

needles

today i was checking some cams out in my summit.

everybody tells me to just go with a summit cam, theyre cheaper and the same as a comp or crane cam. i'm probably going to go with summit anyways, they got the kit that comes with the lifters.

how does a 204/214 398/420 look? the range is 1500-4000 rpms. should i go with a different range or what?

87' LB9 AUTO
keep in mind i'm still running 2.73's.

Chris89GTA

iTrader: (2)

Only problem w/ the summit cam you refer to, is that it is a hydro flat tappet cam. The block is a hydro roller block. You need a roller cam to go in the roller block. Thats gonna be a little bit more expensive just for the cam than the cam/lifter kit for a flat tappet.

1MeanZ

iTrader: (9)

yes you need a roller cam for sure, and probably lifters too, lots more money than just a flat tappet cam. anyhow, 204/214 398/420 is pretty mild, not much more than stock, but that might be a good cam if you plan on keeping the 2.73s. with the stock converter and 2.73s you will want all the off idle and low rpm torque and power you can get. it will be a soggy turd off the line if you go very big on the cam with stock highway gears and tight converter. do you plan on keeping the stock gears and converter?

brutalform

Correct me if Im wrong but I believe the LSA is 117*

brutalform

I think they were identical. The later 305 might be slightly larger than the earlier 350.

brutalform

BTW, A Crane catalog(the big one) has many specs. in it that GM used in production cams...

needles

keeping the stock gears and converter.

the 204/214 i was talking about that you're referring to is a flat tappet cam. scratch that,haha.

needles

by looking at what i posted earlier,how do you all think this cam will do? they're really close to each other,so i probably wont notice a huge difference with either one i go with,but it doesn't hurt posting.

Comp Cam 12-402-4 260AH-14 (212/218 & .444/.444 & 114 LSA)
Comp Cam 12-314-4 260AH-12 (212/212 & .444/.444 & 112 LSA)

thanks again!

Grim Reaper

You are right Tom. The 88-89 LB9/L98 cams had a 117* LSA while the 90-92 LB9/L98 is 114.5* LSA. But the 88-89 did have more duration (207/213 vs 202/207 for the 90-92 cam) and a bit more lift (only a couple of thousandth more though). And the LB9 is the same as the L98 ALWAYS in the case of a 5 speed LB9 and in some of the later year auto LB9s.

BTW, my buddy Keith got his 248/256 @.050 Solid Roller Cam installed. He whimped out and only got the 110* LSA (I told him to go 108*).

I have to get down to his place to tune the WOT, but for idle and part throttle, it started without ANY prom change (from the previous prom I burnt with his old cam). It actually runs beautifully for idle and part throttle...but I DO have to change for the WOT.

Everything is the same as last time (383, Miniram, AFR 195s with Competition porting 2.05 intakes, SLP 1 3/4" headers with Mufflex 4" exhaust). The only change was the cam (222/230 112* LSA HR) to the solid roller.

Now Keith is thinking he SHOULD have installed the BIGGER Solid Roller like I originally recommended also. Oh well, when Keith gets bored with this cam, it will give me another cam to buy from Keith.

Grim Reaper

I don't think any of those are hydraulic roller cams. I haven't checked the specs myself, but usually all Hydraulic Roller have "HR" in the code. If your engine is 1987 or later, you NEED a hydraulic roller cam.

Guest

I had this cam, though I am pretty sure mine was 114 LSA. Anyway, I think the 212/218 would have been the better choice.

Also Glenn has a good point. You really need to make sure you are looking at hydraulic roller cams because those are not.

needles

i thought they were roller cams.
the guys over at iroc zone told me about the 260AH-14.
i checked out the compcam's catalouge (http://www.compcams.com/Technical/Cu...ML/128-169.asp)

that cam and the other one mentioned says it's a hydraulic flat tappet camshaft.
nothing about roller, but it says it's for 305+350 TPI's 1987-98. i just inferred from the advice given to me about them using that cam,and reading what compcam has to say that they were roller cams.

brutalform

Glenn, now I wish I installed a larger camshaft in my car. I tell everyone that it is a "mild"436. With 236/244@ .050, it is a small cam. When my engine was being built, I never dreamed of programming my own proms. Hmmmm, maybe I can get a large cam off of Keith when he decides to up the ante....Tom

BTW, Doesnt Keith live in the states?

Grim Reaper

Yes, he lives in Northwest Washington State, just south of the Canadian Border. I try to visit Keith when I get down to the "Coast" of BC.

formul8!!

If you are going to spend the time, why not go with a better aftermarket cam?

Re-using even the stock 350 cam is a waste of time, IMHO

Zepher

iTrader: (1)

This is the cam I used in my 86 305,
Right click and Save As to download the Video

http://www.cranecams.com/?show=brows...tType=camshaft

Part Number: 114142 Grind Number: POWERMAX 2050 (FORMERLY COMPUCAM 2050)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 SERIOUS PERFORMANCE FOR 305 AND 350 CARB EQUIPPED CARS W/AFTERMARKET INTAKE, PERF. CYL. HEADS AND FREE FLOW EXHAUST. AUTO OR MANUAL TRANS OR MODIFIED 305 W/ 5-SPEED. AXLE RATIOS 3.73 OR NUMERICALLY HIGHER REQUIRED. SPRING AND RETAINER KIT REQUIRED FOR MAX. PERFORMANCE. (50 STATE LEGAL IN 81-87 267 THRU 400 CARB EQUIPPED CARS ONLY. C.A.R.B. E.O. D-225-25) BASIC RPM 2200-5200
Engine Size Configuration
262-400 C.I. V
Valve Setting: Intake .000 Exhaust .000 HOT
Lift: Intake @Cam 3027 @Valve 454 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3200 @Valve 480
Rocker Arm Ratio 1.50
Cam Timing: TAPPET @---
Lift: Opens Closes ADV Duration
Intake --- --- 272 °
Exhaust --- --- 284 °
Spring Requirements: Triple Dual Outer Inner
Part Number 99848
Loads Closed 105 LBS @ 1.700 or 1 45/64
Open 280 LBS @ 1.240

Recommended RPM range with matching components
Minimum RPM ----
Maximum RPM ----
Valve Float 6500
Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 1 BTDC 35 ABDC 107 216 °
Exhaust 51 BBDC (3) BTDC 117 228 °

Tremo

I have an 88 LB9, and the stock roller cam is pretty mild, even though it has decent duration and lift. Idle is smooth at 750 rpm. I'd recommend something a wee bit hotter than the stock LB9 cam.

How about a GMPP Hot Cam?