Custom Cam Specs, your opinion.

[03.5MSP]

Im looking into getting some cams made. I have the current cam specs that the shop is planing on using with my MSP. I write those after this.

I want your opinion on what i should do with the specs. Ex, make them with a higher lift, etc. You guys that have any knowledge about cams please post your opinion and let me know what you think. Thanks

Marko

The current setup will be.

Stage 2 Exhaust
seat duration = 264 degrees
.050" duration = 224.8 degrees
Gross cam lift = .375"
Hot valve lash = .014"
Net cam lift = .361"
intake opens 20 degrees BTDC
intake closes 64 degrees ABDC


Stage 1 Intake
seat duration = 256 degrees
.050" duration = 217 degrees
Gross cam lift = .346"
Hot valve lash = .014"
Net cam lift = .332"
exhaust opens 62 degrees BBDC
exhaust closes 14 degrees ATDC​

 

[03.5MSP]

Bump

 

[Pirana]

well we have been reserching this, and this is very complicated...cams are by far the most complicated equation of power making. I will be looking at this thread for more info from the gurus.

 

[lisevolution]

what I would do is talk to a person at a cam shop about what you are looking for out of the car. Different profiles do different things. For example the GB for the cams on this board appear to be showing a significant increase above 4K rpm especially on the NA cars that have it. You may want to contact Integral Cams or Isky cams about getting something custom cut for you and tell them what you want. If your car is a daily driver you'd want to go for a more mild profile that is way more drivable than a race spec cam would be...I'm not an expert in this field by any means but even my friends who are serious camaro, firebird guys who build 9 and 10 second street cars discuss the custom profiles of their cams with the companies making them to decide what direction to go in...

 

[03.5MSP]

here is a question maybe you guys can help answer. With cams what does a higher lift mean. I know turbo cars "should" benefit from a higher lift. In the mean time ill be contacting a few people and shops to see what their opinion is.

 

[_Sloteg_]

here is a question maybe you guys can help answer. With cams what does a higher lift mean.

This should help you understand a little more about cam's.
And, what some of the terms used mean... http://www.chevytalk.com/tech/101/Cam_Theory.html

 

[Thekid760]

The cam specs you posted appear to be integral cams stage 1 intake and stage 2 exhaust. From what I've heard they are the ones that made tri-points protege cams.
They sound like good profiles, fairly aggresive, but not too bad.

Anyone else have any info on them or suggestions?

 

[Kooldino]

Higher lift means that the valve opens more than it would from the factory. It will go deeper into the cylinder and allow more air to enter the cylinder. Ultimately, lift is restricted by the timing of the valve opening to max lift and it's clearance to the piston at that point in time.

The specs from the above cams appear to have more lift than stock. Both turbo and N/A motors should benefit from some added lift.

 

[03.5MSP]

Another question for you guys. In a FI setup should the exhaust cam be bigger or the intake cam? GB cams have the exhaust cam bigger and the integral ones have bigger intake cams.

 

[03.5MSP]

Bump, i know there are some of you guys out there that might have some input on this.

 

[03.5MSP]

Well after contacting multiple cam shops, i was told that typically in a turbo application the intake cam is supose to be bigger than the exhaust cam. Just an update for you guys.

 

[Pirana]

I thought on turbo applications there shouldnt be any overlap? Is that what you are looking into?

 

[Blake]

bump interested as well

 

[03.5MSP]

I thought on turbo applications there shouldnt be any overlap? Is that what you are looking into?

Yup thats correct, turbo cars will only loose performance with alot of overlap. I was talking about the intake cam having more lift and duration than the exhaust cam. In the GB cams the exhaust cam is bigger than the intake cam. Both Integral Cams,Web Cams,Crower,Comp have all replied to my email stating that typically in a Turbo application the intake cam should be bigger.

 

[Pirana]

what about piston/valve clearance?

 

[03.5MSP]

The specs I listed in my first post for both the intake and exhaust cams will not have any issue with clerance, if i wanted Integral could also make me a custom set of cams with more lift, and i would be ok. Integral has already made a set of cams for the protege(NA cams) so they know the specs of the head, and how much clearance we have.

 

[03.5MSP]

So I will be going with a custom set of cams from Integral. Im thinking of a 268/268 lift and custom Integral duration for both intake and exhaust. Im not looking for power only above 5000rpms. I would like some low-end power as well since my car will not be a race car. More like a daily zoom-zoom machine(drive2)

Any input would be nice.

Marko

 

[baconbitz]

Do it and slap that thing on the dyno. Should be interesting to see some numbers.

 

[Speed3.5]

i back you up on this project

what range of rpm's are you looking for mid-topend range ??

how much will they run for you ??

 

[ItsSlow]

If I end up keeping the car I might look into this.. Also, would upgraded valvetrain be needed with these cams? Or would they work fine with the stock equipment?