Ok guys. I ordered this cam today from work. I am just curious if i will notice a big difference in my car when its installed or if the only difference will be on my time slip. The reason I ask is because i have no idea what the stock numbers for a LO3 cam are, but here are the numbers that edelbrock has on this cam...

advertised duration
intake 244
exhaust 264

duration @ .50
intake 194
exhaust 214

Lift @ cam
265 intake
294 exhaust

lift @ valve
398 intake
422 exhaust

Are these numbers good?? I just need some plain out advice from you guys.. If its not the cam that would make the car runs its best then I can always return it.. One more dumb thing... the guys putting it in said that i pay for all the parts and he will charge me 250 to put it in with a new timing set... is that a fair price?

thanks in advance
scott

 

i dont think that is a roller cam and that doesnt look like too much lift

 

I dont think its a roller cam either but does that matter.. can i use the flat lifters?? the book said it was really for a LG4 and something else... but it went up to 95.. i guess its more for a truck then a LO3.. If it wont work just let me know cause its ordered but not paid for....

 

I think you would be making a mistake not sticking with the roller cam.You might actually lose some torque with that cam.

 

hmm.. I have that cam along with the 3704 intake and the 6085 heads.. I only have 900km's on it and she seems to pull throughout the whole rpm range... also I'm running 0* base timing right now .. after 1000km's I switch to mobil 1 and advance base timing to 8*(per edelbrock with the 6085 heads and their chip)..

 

Hey,

I dont know much about the numbers either from that cam. I believe i just bought that cam as well. If it is the Edelbrock Perfomance RPM. I am completely rebuilding my engine on a stand and almost it will be going in this weekend. I was told that this cam will put out an extra 40-60 hp over stock. What kind of engine are you putting this into? Mine is going to a 305 tbi for an 88. About the timing. I know its not really hard to even with the motor in the car. Setting it though my friend did. But if you know how to set it, i think all you have to do is make sure dots on the gears line up. Im not totally sure on this but I havent seen anything about the same cam and i had some questions with it as well.

 

I would advise against it. That is alot of money for a cam that will end up giving the same or a little gain in performance. The number arent much better than stock AND its not a roller cam. If there are two cams with the same numbers, one being roller and the other hydraulic, the roller will be noticebly better. Maybe look at the Crane cams. They arent rollers either ..but they are more aggressive and still compatible.

 

If you're getting the Performer RPM cam good luck getting it to work with a stock LO3. Even if you get the clearances to work out it will not work without alot of prom burning. And...the stock system, intake, heads and exhaust will not match it.

A much better choice is an LT series cam or one of Comp Cams units for factory roller engines

 

Crane makes plenty of roller cams, I have a CompuCam 2020 roller cam in my car and it runs great, that's what I would recommend.

 

Ok,

I am not following you here. What does LO3 mean? Why wouldnt it work? If it helps I exchanged the heads with the same but ones from a speed shop that were rebuilt and pressure tested and everything. The intake is the stock, I plan on putting on a performer high rise later on in the summer as well as dual exhaust. So if you could elaborate here. It would help. The engine is going in tommorrow morning

 

What year is yer car?

The LO3 is the 305 cid, TBI that was released in 1988 (?) I think that's the first year. Maybe '89.

Anyway, that was also the time that GM made the roller cam standard. It REALLY helped the typical '305 cam wear' problem that the 305 was infamous for.

If you convert from a roller to a flat tappet, you're going bass ackwards. You will see more frictional losses, as well as increased cam wear. If the car has a roller cam, or even a block designed for a roller cam, use it.

One more thing to keep in mind when going from a roller cam to a flat tappet; You'll have to get longer pushrods. Just something to remember, not something that's gonna put a huge dent in yer wallet.

AJ

 

Ok,

Well i am using the block from an 84 4bbl HO. When the cam was taken from it, it was not a roller, now the 88 engine that we just pulled possibly could have it in there, I dont know I really havent taken it apart to find out. I did have new cam bearings put into the block. The tbi was first in the 88 i believe. So what am i looking at now if i have a stock engine, with that cam in it. Will it help at all? I plan on putting different heads and an intake later on in the summer.

 

I think he's saying it might not work because that cam is just too aggressive for the computer to handle.

 

JR if you asking about the RPM cam working with a stock TBI computer it would take alot of prom tuning because that is an agressive cam that would have low vacumn. The tbi computer uses a vacumn signal as part of the fuel mapping. More agressive cams can be tuned by someone who knows what they're doing. (not me at this point).

A better choice is a milder cam such as Sonar has just finished installing. It cranked right up and drives good. This was his first such project so its good to start mild IMHO. At least that's what I'm preaching and doing.

 

Well the engine is in the car rightnow and will be fully hooked up and ready to run tommorrow. I have done this step by step with the mechanics at an Air Force Base. I have every tool i could ever dream of at my disposal, and the mechanics that are there are really good, and have been doing this for some time, so i hope they can tune the prom as you say. If they cant i can always take it out when its in the car and add another and save this for later. What kind of peformance TBI would you recommend for my car. My ideal hp is 350... with a lot of work ... :-)