Kris Mangrum

I ordered a 228r cam with a lsa of 112 on monday so that I could install it and the motor in the car this weekend. Well a mistake was made(it happens) and I was shipped a 228 114 instead. Its killing me and I want to put the motor in this weekend. How much of a difference between the two? This car will never see a track or a strip but will one sound better than the other and will there be a performance difference. I want a noticeable lope.

Ls1
Ls6 intake
Ls6 heads
.040 heads gaskets for around 11:1 comp

The Alchemist

iTrader: (19)

If you want lope, then unplug a coil pack wire. If you are concerned about how it sounds, then change the exhaust setup. A cam selection should be based on engine performance, not sound or lope.

Sorry, but picking a cam based on how it sounds or lopes is just stupid. If you're worried about how it will impact drivability or power, you probably would have a hard time telling the difference between the two except for on a dyno.

Kris Mangrum

While it may be "stupid" to you, its not to me. I'm looking for a whole package deal. What difference on the dyno?

89 formula350

iTrader: (8)

it will move the powerband slightly.. you will still have a lope


https://ls1tech.com/forums/generatio...s-114-lsa.html

scroll down to matt's post if that doesnt show ya

Kris Mangrum

Thanks for the link. I was going to do the 110lsa but they couldn't get it to me by this weekend so I ordered the 112. Hmmmm? What to do.

flintwrench69

iTrader: (11)

I got a 228r on a 114 & its got a nice lope to it, my powerband isnt much different than the 112 cam is. The 114 is supposed to be smoother idle but its not as smooth as I thought it would be. Its a great cam with a fairly wide powerband. If you really think you gotta have the 112 then wait it out but the difference in powerbands is very little.

Kris Mangrum

The thing is this car will not be a Daily Driver. It will only be driven to shows, pleasure cruise's, that sort of thing. Thanks for the comments, every bit helps.

69LT1Bird

iTrader: (1)

It will also have an effect on PTV. Like stated above, pick a cam for the best performance for your car not for a lopey idle or sound. Put in a toggle switch and kill an injector or coil when you think you want to impress people with the idle.

itsslow98

iTrader: (18)

You could always drop the idle 50-100rpms to make it lope a little more. Mine has a nice chop to it, sounds like you made your mind up and want a 112 but are too impatient to wait.

2000RDT/A

haha they must have sent it to me. i got my 228r on a 112 in on tuesday lol

Kris Mangrum

The car will do the impressing, with or without me being involved. Its more for me I guess. Thanks guys

The Alchemist

iTrader: (19)

Like stated, if you really want a 'lopey' idle, drop your idle rpm, or leave it a factory settings and it'll lope, but be prepared for other issues like stalling.

Kris Mangrum

112 is on its way to me

redz_02

iTrader: (4)

Look into overlap. This is what determines what you call lope. Lowering your LSA just adds overlap, and makes the power band a little peakier. With an even split cam with those specs, the deference between 112 and 114 won't be noticable. If you want a big lope, you want a big split cam.

02*C5

iTrader: (1)

Agreed, the only real time you will notice and that is if you really pay attention is if you are doing a highway pull, Your power band will come in at higher RPMs. Now depending on the cam and the amount of * of overlap will let you know how much lope you are going to get.

Easy way to determine overlap is

int+exh lobe
what that equals to divide by 4 minus LSA and then X2. What ever that equal is going to give you your degrees of over lap.

Most off the shelf cams have an average of 14* to 16* of overlap specially for N/A application. Positive over lap will give you lope, negative overlap will not. FI cams have small lobes and are set between a 115-117 LSA Most FI cams will give you negative *s of overlap and 0 lope. That is the reason if lope is that important to go with a cam with an LSA between 110 - 112 and bigger lobes (ie 22X/23X or 23X/24X) The Comp 23X/23X series are great for that.

Kris Mangrum

The cam I bought is a 228/228 with 112

228+228= 456

456/4=114

114-112=2

2x2=4 degrees of overlap. Is that right? IF so its way under the normal amount you gave me. Thank for the info.

Super Speed

iTrader: (8)

The 228 will Lope but it won't be any where close to say a ms4 or ms3 in terms of lope

02*C5

iTrader: (1)

Yeah 4* of overlap is not much if anything at all, your not going to get that lope you're after. You can have the installer degree your cam up to 4* of advance and that will change the lobe events and get you a little more TQ under the curve and a little more lope. That's about the best I can tell you.

good luck

MikeZ06402

Good to know info

Now that explains why I can get this puppy to idle better than I expected. If my math is correct I have -5 degrees of overlap. So is that to say I have no overlap with 5 degrees of seperation between the lobes? Either way I like it and still have plenty of power.

02*C5

iTrader: (1)

If your avatar is right you can't compare a 402 and a 346 period its apple and oranges. Your displacing way more air and fuel mixture and you can owe overlap and still have more hp.