BCNUL8R

iTrader: (2)

What is the cheapest valve train setup you trust to reliably turn 7500+ rpm. Not at a constant like a circle track car or something, but a street/strip type application.

Assuming the obvious like cam, heads, intake manifold to actually make power at those rpms. Personally I am and will continue to be procharged so that certainly helps with making power at high rpm due to the nature of the centrifugal. Mostly focused upon valve train requirements.

wannafbody

iTrader: (2)

Probably should do the BTR or Comp BSR shaft rockers

01CamaroSSTx

iTrader: (3)

JESEL, Crower and T&D shaft mounted setups.

QwkTrip

iTrader: (23)

Stock rockers with trunion upgrade. Put your money in lifters and push rods.

ddnspider

iTrader: (26)

Thickest pushrod you can fit. Link-bar style lifter of your choice (Johnson). I would talk to a couple of cam manufacturer's about their suggestion for rockers and springs.

BCNUL8R

iTrader: (2)

Thanks guys. Current cam is 232/248 116 LSA with a 112 center line. Lifters are ls7 with 0.080 preload. Pushrods are summit 11/32 .120 wall. Rockers are max effort ws6store.

I shift at 7-7200 currently with 241 heads, ls6 intake, and stock throttle body. I want to shift just before 7000 and at the track it does around 6900, but with tire spin on the street it varies between 7-7200 with ET street R’s. Seat of the pants says it’s still making power.

Recently broke the ls6 intake and ordered the BTR equalizer. This got me thinking that long term I want better heads and more RPm to take better advantage of the intake.

So better heads and better lifters might be all that is needed for 7500 rpm reliably? Adjustable rockers would be nice for the narrow window on some of the lifters out there, but pricey also.

SLOW SEDAN

iTrader: (13)

Pretty much every LS I've done revs to 7500 or higher with stock heads, stock rockers (sometimes a trunion upgrade), whoever's cheapest brand 5/16 pushrods, whatever springs are on sale, and amazon LS7 lifters. Works perfectly fine!

Just did a dyno of the BTR manifold and it picked up some tq over the Holley sniper unit, was still making power at 7500.

jhshnh

You’ll get many different opinions so regardless of your choice of parts properly setting up your valvetrain is one of the most crucial and overlooked things for high rpms. Proper pushrod length, lifter preload, etc. go a long way for longevity.

smitty2919

Interesting choice of words.

01CamaroSSTx

iTrader: (3)

Valvetrain stability and high RPM? I gave you mine.

00pooterSS

iTrader: (40)

Solid roller

BCNUL8R

iTrader: (2)

I don’t have to do this right away and I did take note of your opinion.

once I get the intake I’m going to enjoy it a bit and make sure the tune is dialed. The only change is the ls6 intake to BTR. I street tune, but I’m curious how an intake that provides better balanced cylinder air distribution while giving up low end for high rpm power actually effects my tune. I’m sure it will be subtle changes. I also took timing out as I come into boost in the 3000-5200 range to help with traction. I may be able to put some of that back to improve the areas the BTR sacrifices down low.

Once I’m happy and everything is good I’m going to add a small nozzle of meth injection after the intercooler. Also already running 50 percent ethanol.

What I wanted to achieve with this thread was too see what the minimum requirements were to reliably spin 7500 plus definitely not over 8000 though. I also knew I’d get some opinions from people that trust nothing but the best which is probably more spendy than I care for. So I’ll probably end up somewhere in the middle.

BCNUL8R

iTrader: (2)

I haven’t ruled that out. Honestly never had a solid roller so I don’t know how much work/cost is involved. I don’t put a bunch of miles on it and I’m not afraid of a greater maintenance schedule with it.

01CamaroSSTx

iTrader: (3)

I have pedestal mount T&D adjustable full rollers held into place by 10mm bolts in the 01 and I'm not sure if I'd run them with a solid setup spinning that high and I certainly know how to find out but don't want to. I find myself in the middle with parts as I went for the dragonslayer crank but only Compstar rods when I know that's one place you don't go cheap. Now I'm not making 1000fwhp and I don't have a bottle on it yet either but if I'm turbocharging I'm thinking new connecting rods. I love NA but I'd be lying if I didn't envy those out there running with forced induction.

BCNUL8R

iTrader: (2)

Tuning is my strength. Not that I'm better than anyone else, but it's probably what I'm best at. Many opinions and this could get way sideways quick, but in my opinion procharger is the easiest way to make a lot of power. I love how it drives a lot like an NA setup just with easier to achieve power. Not that it's better than other combo's just certainly super easy to make power with. It seems like anyone can throw together an LS motor for cheap, put a procharger, and a fuel system to support it on it and make 1000 hp while being completely street able if you know how to tune. I've been the all motor guy and the nitrous guy even had a turbo buick years ago. I love and respect all combo's. I really respect the all motor guys that build an LS and make over 700 hp. I think the junk yard turbo setup is amazing and enjoy seeing what people can do, but it's not my thing. I'd like to develop a little more on the engine building side of my skill set. I'd like to build a reliable high rpm bad *** big bore stock stroke length motor with a bigger blower than I currently have in the future.

QwkTrip

iTrader: (23)

So what makes you so qualified to talk to this?

I'm not exactly loaded with lots of real world experience, but this is one I've actually witnessed as my friend has an 8300 rpm LS1 that runs 30 minute track sessions with stock rockers and he's been doing it for years.

BCNUL8R

iTrader: (2)

What lifters does he use?

01CamaroSSTx

iTrader: (3)

I mean no disrespect and I'm not speaking as someone who has been there and done that or who knows all there is to know about engines. So you have a buddy that can turn his motor to 8+ on a hydraulic roller with non adjustable rockers well good for him. Most people want to build cars because they love racing and in the end it really depends on what YOU want out of the valvetrain and how much YOUR willing to spend on a reliable valvetrain suited for the application. If there wasn't better alternatives to stock parts then we wouldn't have a flooded market with better engine components now would we? I'd like to run solid setups on both of my cars but right now it's hydraulics and pedestal mounted rocker arms that won't see past 7 as we all know that going fast isn't cheap and it's even more expensive when you break it.

ddnspider

iTrader: (26)

LLSR is something to consider if cam swaps are on the table.

tblentrprz

Stable valve train - no problem. With the right lobe, spring and pushrod for the valves being used - good to go. Shaft mount rockers add stability but not required at 7500. Approaching 9K+, different story.