Caveman

iTrader: (2)

A friend of mine wants to use this cam that I used to use before the Vortech SC, Comp XER 234-240 5.98/6.08 on 112lsa. I had Wisco pistons w/ valve reliefs, he has a stock bottom end w/stock pistons. Will he have clearance issues with that much lift?

SideStep

I am going to stay yes you will have to fly-cut to fit that cam in...


BTW... That cam has 62 degrees overlap at .006 lift and 13 degrees overlap at .050 lift... most of that boost is going to be shoved straight out the exhaust....

Haans249

iTrader: (24)

Probably why his friend is going to be using this cam now

bigdsz

iTrader: (1)

I would say notch, because even if it does fit things will be tight and an over rev or valve float could be catastropic. I notched with a xer 228/230 but had AS heads where the valves hang down lower.

Caveman

iTrader: (2)

Yes, this cam has been on the shelf for a year since the blower install. The cam worked great NA but its not for boost.

orangeapeel

iTrader: (18)

I bet it would be really close as far as PTV clearance. I would definitely check before buttoning it up and cranking it over.

nexvctm2001ss

iTrader: (8)

think the biggest lift is 601 before you have to fly cut the piston not sure though

FBodyPerformer

iTrader: (19)

Well im the friend that wants this cam. I really want to put this in without having to mess with the pistons. but its not looking this way now. to have the pistons cut for the valves to clear do you have to take out the entire engine and take out the bottom end? Thanks

nexvctm2001ss

iTrader: (8)

my buddy just said you will have to cut the piston

bigdsz

iTrader: (1)

All you do is pull the heads off and rent a head that comes with the Isky tools and you're in business. Install your new cam put a degree wheel on and check distances with a dial indicator and as a back up after you cut .060 or .080, clay the piston and it will tell the final story. There is a write up with pictures on exactly how to notch, use the search feature.

orangeapeel

iTrader: (18)

And it is a really good one too.

The Juggernaut

iTrader: (7)

Are the heads milled or something?
If not, you have plenty of clearence.

s346k

iTrader: (4)

if you have stock heads that aren't milled, you can run that cam without flycutting.

PREDATOR-Z

Lifts have little to do with PTV.
Durations and valve events is what you have to watch for.

SVThis

iTrader: (2)

people run the T-rex and the magic stick with over .601 lifts all the time without flycutting the pistons....as long as u have stock unmilled heads you'll be fine with that cam

white2001s10

iTrader: (4)

It's not the lift that gets you, it's the overlap area. A friend of mine runs .630" lift with stock pistons and milled heads.
There's no way I'd run your cam in a stock engine without valve releifs.

orangeapeel

iTrader: (18)

He is right, you might want to even clay the piston to double check though.

I have a 244/248 without a flycut right at .600 You will not have to cut.

Beast96Z

iTrader: (21)

It's a G5X3 cam on a 112. If I remeber correctly, LG recomended fly cutting for this cam at first, but after they saw how tight you could run these motors, decided it wasn't neccasary any more. The lifts have jack to do with wether it will clear or not. It's the lift/duration in relation to the piston that matters. You can have a .900" lift cam as long as it opens when the piston is at BDC. Either way, you'll be fine running that cam without reliefs, however you should be careful on missing shifts or over revving. You also want to make sure you have excellent springs so you don't float the valves.

bigdsz

iTrader: (1)

I think what you guys just don't get is that a cam can fit, but how close of a fit. I've got a Comp XER 228/230 112+2, a lot of people would say it will fit, well I only had .045 clearance at 8* btdc. Intake valves should have a minimum of .080. If I leave it like that and don't notch what happens if I float the valves or have an over rev situation. It's better to be safe than sorry.

We recently pulled the AFR heads off a friend of mines car with a 224/228, guess what there were little arcs where the intakes had just bearily touched the pistons and cleaned the carbon off.

98A4LS1

iTrader: (1)

What were the rest of the specs on the 224/228 cam?