Spawne32

iTrader: (1)

Soon as you get measurements, get back to me, im curious as to how they compare to what I had bought. The LSA i find puzzling because stock LSA is 130 on those cams.

mrbelvedere

iTrader: (3)

base circle

int cam 1.11 28.6mm

exh cam 1.11 28.6mm

lobe height

int cam 1.37 34.9mm
exh cam 1.35 34.5mm

there is 0.0197 difference in lobe height

Spawne32

iTrader: (1)

1.4mm off the base circle (stock is 30mm) you should be perfect with the ZZP stage 2 lash adjusters, id run them on both sides IMO. That's good that they were able to maintain that on the exhaust cam as well. My exhaust cam was measuring in at 27.3mm on the base circle which is what lead to the premature cam wear and the monstrous ticking noise I had even with the ZZP s2 lash adjusters. Which is why I wound up sending them back to delta, not only that, they refused to give me any specs on opening and closing events.

If your engine sounds like this after installing them, you will know.

mrbelvedere

iTrader: (3)

a 0.1000 is the tipping point on the valve geometry he said they removed .060 of the base circle we will soon see how it runs

CordiaDOHC

iTrader: (2)

Would love more aggressive cams. But picked up an LNF exhaust cam. Just going to run that. Let the sc make up the rest of the power

toolman

I'm curious about the kind of oil you used (pre-rebuild) to get that much sludge buildup.

Spawne32

iTrader: (1)

From the records I have on the car, nothing but walmart service center oil changes for the past 126,000 miles. lol That's the reason why as soon as I bought the car I serviced everything, including the trans.

mrbelvedere

iTrader: (3)

sludge is created from not getting the oil hot enough to burn the moisture from the oil. a lot of short trips will cause it and all oils will create sludge

mrbelvedere

iTrader: (3)

i either have a bad lash adjuster or non true base circle on 1 cam lobe it holds the valve off seat

nhanson

iTrader: (1)

What did you modify for VVT for the LNF cam? I have it installed now

Robbo

Does a 2.4 cobalt have forged pistons?

Staged07SS

iTrader: (25)

No... some years had forged rods, but not pistons.

mrbelvedere

iTrader: (3)

no ecotec comes with a forged rod

Staged07SS

iTrader: (25)

Huh?! I thought the LSJ and LNF have forged connecting rods...

Slowbalt2000

iTrader: (1)

Okay, Mr. Technical.

Slowbalt2000

iTrader: (1)

According to gm they do.

Staged07SS

iTrader: (25)

Yup... all my GM documents (build book, Bill Duncan, numerous spec sheets, etc.) claim they came with forged connecting rods.

If it's wrong I want to hear Johns (mrB) take on it.

Cobalts&Peaveys

Actually, you can build an le5 to around 350 hp before you even drop it in the car. Look up Roush Ecotec. It's not really news anymore. I'm just happy to finally see somebody doing this **** correctly, instead of just boosting everything. I'll be coming into money in the near future, and I'm now physically disabled, so I cant really turn a wrench anymore, so I'll be having someone do the build for me. This engine is the best platform available. Honestly, I would rather have a 4.3 Vortec in my Cobalt, honestly. With RWD. Maybe a 4.3 Ecotec? Since I don't have that much money, guess I'll have to make due.