73olds350r

I’m rebuilding a 73 350 its going to be 0.30 over cranks going to be turned. Going to be reusing stock connecting rods, I’m having it balanced. I going with the speed pro flat tops and I have number 5 heads that have a valve job and porting, stock size valves. Going to fill in the filling the heat riser crossover. Cam is going to be Lunati 00083Hyd. Flat Tappet; RPM 2500-5500; Adv. Dur. 290 Int. /300 Exh.; Valve Lift .496 Int./.520 Exh.; Lobe Angle 112 Deg.; I going with Comp Cams 1441-KIT - Comp Cams Magnum Roller Rocker Arms. Cloyes double roller timing set. HEI distributor Performance rpm intake stock q jet rebuilt, headers. 2004r rebuilt… 8.5 rear end with a 3.42 or 3.73 lsd ever one I can get my hands on. This is going in my 1986 cutlass
I going for around 10to1 cr
What type of hp number do you guys think?
Is that a good cam choose has anyone used those comp roller rockers?
Do you think I need to get a HV oil pump what other types of oil system upgrades?
I’m I forgetting anything… I’m going to be ordering parts in a few weeks this is my first rebuild looking for help/advice from people that have been there! I know it going to cost to do it right!!!
Thanks Kris

cutlassefi

350hp, but that's a generic cam. For some reason I can't paste it but go to
www.realoldspower, com then to General Engine tech then scroll down to "Noisy Voodoo", his build is similar and he bought the cam I recommended. I know your choice isn't the VooDoo but maybe you can get an idea from his post.

Check it out.

73olds350r

so cutlassefi you think i should go with the Erson TQ40 Specs are .218/.228 @ .050, .504/.504 on a 110. it seems a lot of people where saying it was the lifters.
Because the lunati is too aggressive, the reasion I was going with it is because its a ebrock rpm clone and they state 400hp ......I a bit confused but i know the cam has to fit the rest of the set up!
I can really find any info on the tq40 whats the rpm range ....I was planing on running higher rpms maybe up to 6200

captjim

I agree with Mark that there are better cams out there.
I will disagree with your statement that the Voodoo is too aggressive.
Unless you are planning to spend a fair amount of $ on the heads, you will be done making power long before 6200, IMO. Why spin it up if you don't need to, especially if you end up with a 3.42 gear. Get a cam/gear/converter combo that makes power in the 2800-5500 range and have fun driving it.
I have used the Comp roller tip rockers on several builds with no issues.
No need for the HV pump, IMO.

Rickman48

I'd be looking for a different carb, too!
Seems '73 was one of the years GM was trying to pass pollution with a 'leaner carb' and they weren't concerned with mileage or performance! [gas was still cheap!]
My '73 GP with a 400/400 3:08 got about 8 city/14 hwgy and was a dog until I recurved the distributor and modified the carb - then went to 12/16, and ran strong.

joesw31

I like your build! I have used that rocker kit before on a couple of engines with no issue. I always use an HV oil pump with no issues. For cam preference, I have seen people use that lunati grind and I have not been impressed because as mentioned it is a generic cam. I have seen better luck with the stock w31 cam. You can look at these two cams from comp cams 42-306-4 and the 42-310-4 and use there 863-16 lifters. I have had excellent luck with those lifters.

coppercutlass

there is a slight diffrence between the lunati cam and edelbrock the edelbrock's centerline is 107 and the lunati is 108 also the 400 hp numbers the advertise are realistic but it all changes once its in the car i would say pick the cam thats best suited for your set up build it and see what it does in the 1/4 mile im running almost the same set up but with a smaller cam with more duration on the intake side im running low 13's also i would invest in bigger valves big improvement

73olds350r

Thanks for all the info guys I JUST WANT TO GET IT RIGHT THE FRIST TIME!

Rickman48 ...I was planing on getting a new carb when Im able to save up the coin.

I wish I would have went bigger valves I bought the head with a valve job done ... then im going to do the porting myself to save some money.

Like this comp cam 42-310-4 as well just got to make up my mind in a few weeks

Still not sure if I need go with the hv oil pump some say yes and others say no pros and cons......or maybe my bouget will become a factor, thanks

Kris

coppercutlass

do not go with the hv oil pump. The olds oiling system keeps alot of oil in the top end and when you rev it up specially if you plan on racing it it will suck the pan dry and if you go with the hv oil pump i would reccoment a deep sump pan and restrictors. if you keep the stock volume pump go with a toronado pan that holds an extra quart that way you have extra oil in there cheap insurance summit sells the pan for 60 bucks new i think. People think the hv pump is good because more oil flow but if it doesn't drain back that means all you managed to do is get the oil to the top end faster and your chances of bearing failure are higher thats why you install restrictors to restrict oil flow to the top and keeping more in the bottom end stay with the stock replacement unit i run one keeps it oiled no problem i rev my engine to 6k. also if you can download comp cams cam quest you can plug in your car and engine info wheight etc. and it gives you a really good idea of the power it can make not dead perfect but close

cutlassefi

Don't waste your money on restrictors. For a 300hp or so build just shim a new stock pump, but that's after you've checked your clearances. And the problem is not that it pumps too much oil up top, it's that it can't drain back fast enough.

Coppercutlass- if you read the cam cards they're both saying the same thing, Lunati recommends installing it on a 107 intake centerline, Edelbrock on a 107 as well, and but both cams are ground on a 112.
http://www.lunatipower.com/CamSpecCa...rtNumber=00083
http://www.edelbrock.com/automotive_...ams_olds.shtml
This cam will be a pig in your car, jmo.

The Erson will breathe to 6000 no problem if the rest of your combo allows.
Specs are 220/228 at .050 on a 110, 284/296 advertised, with .504 lift on both intake and exhaust.

Hope this helps. BTW I can sell you that same generic cam as Lunati or Edelbrock for $80.00 but I still wouldn't recommend it.

Redog

I just put a HV oil pump in my 330, but I also threw on a 7 quart oil pan.

I would think that a HV oil pump is fine, as long as you have a deeper pan. I've read that a HV pump moves 20% more oil so yes it would suck a pan dry is you have a stock 4 quart pan. I've read that people have put a 5 quart pan on and ran HV pumps and yes sucked the pan dry. A 20% or more increase in oil (at least 6 quarts) would be fine.

coppercutlass

@ cutlass fi my catalogs are more than a few years old they must have changed it its from 2006 . i also agree one degree does no justice i just thought id point out lunatis one degree diffrence in installation. x2 on that cam being a pig., i would go comp cams extreme energy series imo. but to each their own im loyal to comp always had success with them

73olds350r

Im going with comp cams rpm range1,500-5,800Intake Duration at 050 inch Lift219Exhaust Duration at 050 inch Lift233Duration at 050 inch Lift219 int./233 exh.Advertised Intake Duration275Advertised Exhaust Duration282Advertised Duration275 int./282 exh.Intake Valve Lift with Factory Rocker Arm Ratio0.476 in.Exhaust Valve Lift with Factory Rocker Arm Ratio0.508 in.Valve Lift with Factory Rocker Arm Ratio0.476 int./0.508 exh.Lobe Separation (degrees)110

thanks
kris

cutlassefi

Just curious why you picked that cam? What are you after? Sound? Hp? drivability?

Thanks in advance for your feedback.

73olds350r

Well would it not be all 3 cutlassefi..... in a perfect world..... I think the rpm range is good for my build and all the specs are pretty close to the eason you recommended .... and from what i have read it seems like it would fit. If im missing something you can tell me thats y im asking question not answering them ....but i pluged everything into cam quest by com and i liked the number i got not saying there going to be 100% on the money but I not a expert in motor bulids ... so im trying to learn here

if u dont think its good selection tell me why please...it not going to hurt my feeling!

Maybe im trying to hard to understand i learn best by doing things hands on not just reading about it.

Thanks kris

cutlassefi

Not a bad choice really, at least it's not an Xtreme so it will be a bit quieter mechanically and easier on the valvetrain.

My only concern is the big exhaust lobe, 233 is getting a little large, hopefully you'll be using a 3.73, it would be better suited to that. You'll hear that cam, guaranteed. Install it on no more than a 106 intake centerline. That big split and larger exhaust lobe will raise your power range up.

Remember, when they give power ranges that is for the entire engine group, 350 on up. Any cam will behave differently when installed in a larger engine vs. a smaller one. That cam will be best with a bit of a stall converter as well.

Hope this helps.