Is 575whp possible n/a?
So once again, you're saying that in nearly 2 decades you're one of the first, if not the first, to actually want to push the envelope and not settle? All these vendors, builders, enthusiasts etc. (probably thousands if not tens of thousands of builds) for the past 2 decades have been ok with mediocre results even though the platform can surely handle much more? I somehow doubt that.
Of course most serious people will not even bother to post results and their secrets, but you'd think that if it was that easy to get 500rwhp then any ol' joe with more money than sense would go up to a vendor and say "gimme 500rwhp" and then post it for all his buddies to see. If it was this easy, every vendor on Earth would advertise "cam only, 500rwhp, come get it" to make lots and lots of money. Somehow I doubt people would not want cheap 500rwhp and vendors would not want to make money off people by doing a simple cam and then boom 500rwhp.
Look I don't doubt you know your **** and I've seen plenty of what you posted. But given the fact that in the past 20 years this has not been done before and posted, you can see how I'd be skeptical. Hope you get there, but I'm not holding my breath.
Of course most serious people will not even bother to post results and their secrets, but you'd think that if it was that easy to get 500rwhp then any ol' joe with more money than sense would go up to a vendor and say "gimme 500rwhp" and then post it for all his buddies to see. If it was this easy, every vendor on Earth would advertise "cam only, 500rwhp, come get it" to make lots and lots of money. Somehow I doubt people would not want cheap 500rwhp and vendors would not want to make money off people by doing a simple cam and then boom 500rwhp.
Look I don't doubt you know your **** and I've seen plenty of what you posted. But given the fact that in the past 20 years this has not been done before and posted, you can see how I'd be skeptical. Hope you get there, but I'm not holding my breath.
Doug, check out the link posted in here from CF. If you do the PUC math it will get you close. Likely you will need to be around as high as you are willing to push the motor. My philosophy is to only do so on one or 2 passes when you feel that you and the car are all dialed in and ready.
At the World Cup event I was short shifting the car at 7100rpms since I felt I had the other car covered. I would have spun it to ~ 7600rpms I felt I needed to win but that I always plan before the car ever breaks the staging beam. I try and keep everything calculated knowing the risk vs. reward. A few times I did hit the limiter right around the traps, a risk I was willing to take. Be smart out there.
When is that rental?
At the World Cup event I was short shifting the car at 7100rpms since I felt I had the other car covered. I would have spun it to ~ 7600rpms I felt I needed to win but that I always plan before the car ever breaks the staging beam. I try and keep everything calculated knowing the risk vs. reward. A few times I did hit the limiter right around the traps, a risk I was willing to take. Be smart out there.
When is that rental?
Rental was on 3/10 but it ended up not goin down. Big hammer was gonna be there to. I would not have had time to make all the changes that I wanted so I am diving a little deeper.
Reminded!!
I guess if I were to get to close you would be forced to revisit that...lol
11 Second Club
Joined: Mar 2012
Posts: 1,541
Likes: 15
From: South Florida
This is a great thread. It sheds light that just knowing peak hp#'s does not mean a certain mph at the track. I know a lot of people have that view, certain hp/weight = certain mph. So much more to it.
Take my setup. 495rwhp 383. Not optimized, only revving to 6500, 3.42 gear & so on. I mean I was going through the traps at 5500rpm in 4th. As I have stated this car was not built for the track. It is an awesome hot rod though.
Take my setup. 495rwhp 383. Not optimized, only revving to 6500, 3.42 gear & so on. I mean I was going through the traps at 5500rpm in 4th. As I have stated this car was not built for the track. It is an awesome hot rod though.
This is a great thread. It sheds light that just knowing peak hp#'s does not mean a certain mph at the track. I know a lot of people have that view, certain hp/weight = certain mph. So much more to it.
Take my setup. 495rwhp 383. Not optimized, only revving to 6500, 3.42 gear & so on. I mean I was going through the traps at 5500rpm in 4th. As I have stated this car was not built for the track. It is an awesome hot rod though.
Take my setup. 495rwhp 383. Not optimized, only revving to 6500, 3.42 gear & so on. I mean I was going through the traps at 5500rpm in 4th. As I have stated this car was not built for the track. It is an awesome hot rod though.
Anything that can benefit even a few racers is well worth it.
In that one video you can hear me bump the limiter right around the traps showing that I'm taking advantage of as much rpm as I'm willing to risk. (The limiter was in the 7600-7700 rpm range)
I went back over and cleaned up that post #90 on the CF thread for more accuracy in case anyone wants to reference it. Not sure how to paste it over here.
And to make it clear, these big numbers we are throwing around for a 346 is based on manual transmission and not a DD.
Last edited by vetteboy2k; Mar 17, 2016 at 01:45 PM.
I've seen some youtube videos.. that thing moves out for a stock ls6 with bolt ons. 
10 Second Club
Joined: May 2009
Posts: 3,427
Likes: 226
From: over dere
There's a guy on here running 9's with 470 rwhp
Hio's car has a lot more in it than high 10's to imo
I ran 7.3 @ 95 with a bolt on ls1 the 3rd time at the track in my life
Research and obsession will get you there lol
Hio's car has a lot more in it than high 10's to imo
I ran 7.3 @ 95 with a bolt on ls1 the 3rd time at the track in my life
Research and obsession will get you there lol
11 Second Club
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
I also still have street tires and rims as well as the LS7 clutch on mine. I think a lighter wheel and drag radial and clutch upgrade will get me there. Not sure how much the stock driveshaft will like it though.
11 Second Club
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
That's the plan. Haven't done much research on clutches and their weight. I'm liking the McLeod RXT.. seems like a lot of people are going with that.
Last edited by z28SSilvest; Mar 18, 2016 at 02:30 AM.
10.8 here with 427 rwhp with a 11 inch monster. It's all in the details getting the most out of your combo to the ground. Really wished I would had played with mine more actually. Also not scared to drive it.
Morel makes a good lifter as does Comp.
At 7500+ rpms I worry about other things before lifters.
Yes. In my experience some work better @ higher rpms especially when you get into the big solid stuff where brand gets more important. I typically will seek out light components for all valvetrain parts except...
Pushrods: I never worry about too big. Usually go with the biggest that will fit in the hole and only go with tapered when I can't fit what I want.
At this level I'm less concerned vs. when I'm doing the high rpm solid stuff. Then the valve train details gets much more critical.
Keep in mind this is just my opinion based on my experience and I'm by far an expert in this field.
Pushrods: I never worry about too big. Usually go with the biggest that will fit in the hole and only go with tapered when I can't fit what I want.
At this level I'm less concerned vs. when I'm doing the high rpm solid stuff. Then the valve train details gets much more critical.
Keep in mind this is just my opinion based on my experience and I'm by far an expert in this field.
11 Second Club
Joined: Aug 2012
Posts: 730
Likes: 0
From: Middletown, DE
How do you like that monster clutch? Anyone know how the the stage 3 compares to the McLeod RXT?
TECH Regular
Joined: Sep 2012
Posts: 445
Likes: 0
From: WV
Yeah I have a ls7 in my car and it juss didn't seem to pull up top like I think it should. I think valvetrain stability was my problem bc I had hollow stem intakes and solid stainless exhaust valves. Im putting victory coated titanium ones in the intake side right now and probably going to go with ferrea F2024P hollow stems in the exhaust to get it how it should. I have btr duals now but feel like i should go to a beehive spring for best performance. You have any experience with psi or pac springs?
Ive always heard pushrod weight doesn't matter and im running 3/8 pushrods so im guessing ill be fine on that side.
Ive always heard pushrod weight doesn't matter and im running 3/8 pushrods so im guessing ill be fine on that side.