Cam specs

2014 Sporty Shorty · October 26, 2013

I don't have any intentions of going with a blower, my goals right now are heads, cam, converter, maybe some laughy gas and be done with it. If I wanted a lot of extra oomph I would just drop a LS7 under the hood and be done with it. I want a reliable and easy 450whp and that's it.

Badass69 · October 26, 2013

Good luck making an LS7 work with e92 pcm and the rest of the truck.... even in a hypothetical situation. Maybe whatever the new Z06 will get. I am sure the fuel system will become a limitation fairly quickly on these LT series engines.... Heads look overly massive as it is.

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crushNchowda · October 26, 2013

I don't have any intentions of going with a blower, my goals right now are heads, cam, converter, maybe some laughy gas and be done with it. If I wanted a lot of extra oomph I would just drop a LS7 under the hood and be done with it. I want a reliable and easy 450whp and that's it.

A supercharger would be an easier install, more reliable, and more daily drive able by a long shot compared to a cammed/stalled vehicle. Plus it's one and done on the install no need to check clearances in the future.

I'm surprised you would think all those other mods would a) net you 450whp "easily" and b) be reliable in comparison to a supercharged motor.

It is simply not the case- think of it this way, there are plenty of cars produced from manufacturers with factory superchargers and warranties etc- how many have you seen w/ lopey cams and high rpm converters? The answer is none, because they're much less reliable. I should know, I've had both... Reason I got rid of my G8 was I was tired of driving it around w/ a yank 3800 converter.

Also this is Heavy truck, torque is a good thing, so a SC is a good choice. Pro charger D1SC

clayp · October 26, 2013

A supercharger would be an easier install, more reliable, and more daily drive able by a long shot compared to a cammed/stalled vehicle. Plus it's one and done on the install no need to check clearances in the future.

I'm surprised you would think all those other mods would a) net you 450whp "easily" and b) be reliable in comparison to a supercharged motor.

It is simply not the case- think of it this way, there are plenty of cars produced from manufacturers with factory superchargers and warranties etc- how many have you seen w/ lopey cams and high rpm converters? The answer is none, because they're much less reliable. I should know, I've had both... Reason I got rid of my G8 was I was tired of driving it around w/ a yank 3800 converter.

Also this is Heavy truck, torque is a good thing, so a SC is a good choice. Pro charger D1SC

interesting. Is there any heat soak issues with the Procharger? Do they have an E85 tune for aggressive timing and boost? I'm assuming it has an adjustable diverter to control boost levels. E85 is roughly equivalent to >110 octane in anti-knock capability so I have seen >30# boost run safety in turbo cars

crushNchowda · October 26, 2013

interesting. Is there any heat soak issues with the Procharger? Do they have an E85 tune for aggressive timing and boost? I'm assuming it has an adjustable diverter to control boost levels. E85 is roughly equivalent to >110 octane in anti-knock capability so I have seen >30# boost run safety in turbo cars

In the LSx vehicles I have seen using the pro charger heat soak is not an issue anymore than it normally is w/ these motors. You can add a HSRK (heat soak reduction kit) the works in conjunction w/ a 160 Tstat to more efficiently cool the engine.

Magnusson makes a great supercharger as well in 2 different sizes

Badass69 · October 26, 2013

A Procharger for those unaware is a turbo's compressor with a belt driving it versus a turbine in the exhaust. They work well but not the same as a roots style rotor design. Roots bring bring boost in earlier but depending on case size can become a restriction faster.

Heat soak absolutely is a problem.... now yes I am talking engines other than the LT series here. With direct injection though you should have slightly better detonation resistance. Your static compression ratio is quite high though so for how much boost and for how long I am unsure.

E85 is a good fuel for boost but I mentioned this before being how far you can push the stock fuel system. You need a lot more E85 than gasoline for equivalent power and at some point the stock injection won't do it... especially not being designed for a boosted application to start with.

Any forced induction kit worth its grain of salt has an intercooler. Whether air to air or likely air to water its a must. Take my silly GTP.... GM saw it fit to not equip the car with one. Stock with my larger series 3 engines m90 makes about 7 lbs of boost. I dropped the pulley size among a bunch of supporting mods and now see 9 lbs.... I wouldn't go any further than that without intercooling it. I have to use a sandwich plate design with a liquid cooling system as my blower sits directly in my intake manifold if I choose to do so. My mp112 is very much the same way. Compressing creates a massive amount of heat.... but anything you buy more or less now has an intercooler so that's a good start.

Methanol injection is the next step... I met a guy 2 years ago with a similar age to my own 1500hd. He was internally bone stock with his LQ4 but running a Procharger pushing 13 lbs of boost with a snow meth kit on the truck. I thought it was on the slower side running mid 13's with about a 105 mph trap as those trucks are heavy.... but only about as heavy as the current 2014 half tons. He had slicks on the back which I think was hurting him as his 60' times were slow.... boosted 4 hi launched would have been better in my opinion.

Maggie's come in the 1.9 and 2.3 liter flavor basically.... Whipple builds a 2.3 as does Lysholm....among others out there. Procharger sizes there compressors accordingly like a turbo kit.... which will be neat to see once someone builds a front mount for one of these trucks. Procharger will likely use the P1SC-1 when they release a kit for these newer trucks.

I do agree though that boost is the easiest and most reliable way to have fun...

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crushNchowda · October 27, 2013

Notamember knows his shit

2014 Sporty Shorty · October 27, 2013

Fueling isn't an issue with these trucks because you can either run a cam with a bigger fuel lobe or just run secondary injectors that come on with boost/load. I ran a 5th injector setup on my cobalt SS when I put the s256 on it and it worked flawlessly. On a second note, I don't see hitting 450 whp with a not too crazy cam, some port work/valve train, and some gas as unattainable. I would probably get close to 380 ish with out the gas and run a small shot for the other 70 or so hp.

Badass69 · October 27, 2013

Piggy back systems are junk... period. They work great for people that cant tune and like dumping fuel. The stock injection will run out flow even with the cam change. Its just a matter of where and no one has done enough testing to know yet. The aftermarket will support this but everything takes time.

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2014 Sporty Shorty · October 28, 2013

Maybe junk for you but it worked fine for my 430 whp car. Never let me down once and the injector only came on when the fuel load required (boost). Like I said, I'm not the least bit concerned about fueling because head work and a cam aren't going to require much more fuel even when I run E85. If I decide to run turbo's later on down the road I will almost guarantee you that I will be running secondary injectors though. I have personal experience with them and they work. Don't go reading other peoples problems on the internet and buying into their crap if you haven't used it yourself. I also know a few people running over 600 whp with their cobalts and they all use the 5th injector. Even on the dyno I hit 493whp just to see what the 256 had in it and never had fueling issues.

Badass69 · October 28, 2013

I don't read other peoples trash and reiterate it thanks. You can keep your piggybacks and add ons, I like living beyond the 1980's.... I will continue building with properly sized and controlled fuel systems. What I do for a living coupled with tuning my own stuff makes me this way.

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Joe_K · October 28, 2013

Or build it yourself ensuring it won't scatter its guts the first time you load it because some big name heroes monkey thought 50 lb ft on the rod bolts was 50 inch lbs... I agree on the name... it makes no difference on the results beyond how much it was. I mean look at the heads on an engine I just bought... Lingenfelter ported edelbrocks.... oooo... ahhhh... yeah. Found a test and these heads fell short across the board of some tsp ported 243s.... but they are lingenfelter and cost like 1200 a piece versus the tsps that were 1200 a set. Not worth the money. But I got the engine low miles with an mp 112 on it for less than the blower kit is new so why not.

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Yep, much better off doing it yourself, as long as you know what you're doing. I assume the OP doesn't have much wrenching experience if he's asking where he should take his truck for a cam swap. I'm not particularly brand loyal, but one of the things I still like about GM and the LS platform plus the new Gen V small blocks is they're still CIB pushrod motors. Very easy to work on unlike the the OHC Ford motors.

2014 Sporty Shorty · October 29, 2013

Yep, much better off doing it yourself, as long as you know what you're doing. I assume the OP doesn't have much wrenching experience if he's asking where he should take his truck for a cam swap. I'm not particularly brand loyal, but one of the things I still like about GM and the LS platform plus the new Gen V small blocks is they're still CIB pushrod motors. Very easy to work on unlike the the OHC Ford motors.

Were did I say I was looking for a shop to do the work for me? I am going to buy my Cam from a shop but I will be installing it myself. You know what they say about those that assume........ I was hoping that someone knew were to get the information so I don't have to pull my cam to find it out myself. Granted I could put a degree wheel on for lsa and duration and use a dial for lift, but that would be a royal pain in the ass while the motors still in. Ohh and there's nothing hard about doing a cam swap on a coyote if you know what your doing, it takes more time than a pushrod but it's every bit as easy IF YOU KNOW WHAT YOUR DOING wink wink.