I've got a a 99 z28 with a stock ls1. It is my daily driver but I'm looking at doing some things to it here soon. I'm thinking a 228r cam and I'm going to get 799 heads tomorrow. I plan on using comp double springs and upgrading the trunions. I will also be going with the Circle D 3200 and BBK long tubes that I have had for a while now. I'm just wondering what everyone thought of this combo in a daily. Will it affect my gas mileage any? And what kind of numbers am I looking at? Thanks

 

Yea your gas mileage will suffer but not drastically. I would say you could DD that cam just fine no problems. If you don't port CNC the heads I would 400 rwhp with a LS6 Intake look into an Intake also since your car is a 99 you can gain about 15 hp with a Intake upgrade. A 228 is a old proven cam there have been some newer advancements in cams as far as valvetrain events since then but it's still a good choice. If your getting headers don't waste your money on 1" 3/4 bbk get a 1 7/8 with at least 3" primaries.

 

TSP stainless is a good option. You can also get pacesetters on amazon and a good magnaflow catback and ory. Get an ls6 intake for sure. Also dont foget timing chain, oil pump, lifters and such. Oh amd the stock rear is weak. And i wouldnt go dual springs go with the new conicals. Much lighter. Yes it makes a difference. (so long as lift isnt over .6)

 

I got the BBK headers throw in on a trade. I plan on putting new lifters and I think I'm gonna go with ls7 lifters. I was going to use ge comp dual springs for safety but why would I use conical over dual or beehive springs?

 

They are stronger than beehive and lighter. They hyd roller setup is VERY heavy, reducing the weight (conicals and TI retainers would be perfect) would reduce loads of stress on the system. Which means more power to the tires rather than trying to push valves up and down. This will also reduce bad harmonics making for a quiet, much more stable valvetrain. It will eliminate any dips in power throughout the power band. Oh and very important, the pushrods! Get new quality pushrods, i wouldnt go stock light and flimsy because if they deflect...well bad things can happen, hopefully loss in power and not loss of the engine. Dont let anyone tell you you dont need stronger push rods.

 

I read this article in the conical springs https://ls1tech.com/forums/generation-iii-internal-engine/1753408-review-comp-cams-new-conical-valvesprings-ls-engines.html

 

Huh, I was told they were the shiznit. Well beehives are. Still tried and true.

 

You need to take a long pause and create a sound plan. 799s are a good start, adding some quality dual springs with tool steel retainers are cheap insurance, decent 5/16" pushrods, there is a thread just a few down from this one that outlines what makes a good all around cam with sound valve events, and yes you will benefit from a better intake - but, the OEM LS6 isn't the only option (ie. Dorman LS6).

 

You could also shoot an email to Cam Motion or someone like Ed Curtis, tell thim this is what I got, I want to do this, this and that and it must drive like this and work with these kinds of springs. You know what I mean, they know better than us. Dont jump on anything to quickly. Research before you drop a grand on a cam kit. Ive been rrsearching for months now and im still reading and learning. The 228r performs for sure but is outdated. There are better cams with better events that have been long within our tuning capabilities. I have been closely considering a 228 232 with ivc of 42 and evo of 52. Thinking 6 degrees overlap. Then a good tuner will take care of the rest, this cam in a 5.7, headers ls6 intake and some head work with a stall speed, should run like a raped ape, sound like a pissed off lion and although I dont expect it to run like a Cadillac, it should be great for a DD. Eat the new Camaros for breakfast, a Scat RT for lunch, then some stangs for dinner and leave room for desert.

 

There is nothing special about LS7 lifters. If you pay GM to rebuild your LS1 to stock specs you'll get LS7 lifters. Nothing wrong with them. Just don't fool yourself in what they are.

For the love of Mike don't get conical springs. Psi 1511 is the best all around spring for your application. Those with titanium hardware will remove 1.5 pounds from your valvetrain.

Run comp 5/16 x .080 pushrods should do fine with those springs. Do the trunion upgrade but use the CStraub upgraded ones instead. No needles.

Mill your 799 heads to 61cc.

Spring for a used fast 90 or 92 intake. Make sure you also budget 500 for a good tune and another few hundred for fluids and gaskets.

For the combination of parts you're looking at and your goals, these are your best options.

Now, if you want some added throttle response and even better power, do LLSR through cam motion using shims under the rocker pedestals to set lash. That'll remove even more weight from your valvectrain. Then upgrade to a lighter clutch/flywheel assembly and a ATI balancer