Tony Mamo @ AFR

iTrader: (13)

There are a few things that will never change about the task at hand (producing close to 600 flywheel needed to generate 500 to the ground) with a 346 stock displacement engine.

It wont be cheap.....it requires the right combination of parts....it requires that you pay attention to details the average hotrodder does not....and it requires and efficient driveline (torque converter or lighter weight clutch/flywheel).

If the OP had had a dollar for those that have tryed and failed it might cover the cost to actually pull it off....LOL

And the "failure" can usually be attributed to one or more of the ingredients above missing from the combination.

Its certainly not impossible (its obviously been done before), and it IS easier than it was five years ago, but the few things I mentioned early in this post carry alot of weight (of course I made very broad statements).

My point is you wont get there with a mediocre set of heads.....you wont get there with a mediocre intake or exhaust system.....you wont get there with a mediocre CAI....you wont get there with a mediocre tune.....etc. etc. etc.

But if you want it bad enough, carefully plan, and can afford to foot the bill that will be thousands more than you originally thought, you will be in a class of very few....and that's a cool accomplishment



-Tony

MikeWS6

Why do people have hp goals? Its just a tool. Some read high, some low. Whats it matter?

35thAnniversaryPhil

iTrader: (1)

Thanks for posting Tony! It's a real privileged to have you post in one of my threads!

I have updated the list to include Tony Mamo as the recommended poster for the heads and manifold if you want the job done right.

Tony, when you port the FAST 102MM intake manifold, do you port the 102mm inlet therefore increasing past 102mm? If so do you port the 102mm throttle body, leave it alone or get a larger one made? I was always curious about that.

35thAnniversaryPhil

iTrader: (1)

Now if only PatG could post a little something about this since he is one of the 500RWHP pioneers.

If he reads this, I would ask him how did he get his 508rwhp Trans-Am to put down 445rwtq? Its rare if somebody goes and gets 410+rwtq let alone 420+rwtq. I read his mod list and saw that his compression ratio was 11.9:1. Maybe that has something to do with it.

LS1-450

iTrader: (33)

IDK, personally, it's more about having something to shoot for while we learn & mod. How well can we get are stuff set up? Part of the fun. It's why I'm here anyway. Also, I only measure MAP, MAF, A/F ratio & engine knock. Once these values are as good as they can be, she's making all the power available. No dyno other than the original prior to buying tuning software. If it came to it, could go to the local dyno & do 3 pulls for $50 just to see, but not that important really.

Our original LS engine made 523 BHP on an engine dyno & that was w/ AFR 205's untouched w/ a mild cam. That was long before spending hours studying here. It's also a long way from where Tony & Pat got to in their 500 RWHP build. Again, the numbers are just something to let us know where we are & where we may end up as our understanding & mods improve.

Having professionals like Tony, Pat, Frost & others who are willing to help & share information is what makes LS1Tech a great site.

MeanGreen

The Merge collector Pat G was using on his Y-pipe I believe is custom made. Flowmaster sells one but it looks cheap and not the same quality like the one Pat G used.

35thAnniversaryPhil

iTrader: (1)

Yeah, he custom fabbed his own. The point of this thread is to get the 500RWHP with off the shelf parts so everyone can do it.

So instead of using a custom Y-pipe like PatG did in his setup, we would be using a true dual setup that is (2)x(3") the entire way to the back of the car like Kooks' new full length true dual setup.

http://www.ws6project.com/user_stor/...xhaust-system/

35thAnniversaryPhil

iTrader: (1)

I also added a crankcase vacuum pump to the list since they have been proven to give 10-15HP(Lets actually believe a solid 5-10HP) gain from pressurizing the crankcase and therefore making the piston rings seal better. There are also positives like little to no oil consumption.

https://ls1tech.com/forums/generatio...l-rings-2.html

https://ls1tech.com/forums/generatio...cuum-pump.html

https://ls1tech.com/forums/lsx-parts...mp-system.html

This subject is discussed very little here on LS1Tech but it is worth mentioning especially if it brings 5+hp to a max effort untouched bottom end 500rwhp LS1 build. It is probably unpopular because these crankcase vacuum pumps are powerful and therefore need to be belt driven instead of electric.

adamantium

iTrader: (3)

$795 for 10-15whp is a waste, i rather just run em to the collectors of your header.

edit: wait that would add more drag to the motor. Sure its worth it?

35thAnniversaryPhil

iTrader: (1)

I believe so, if 5rwhp is gained then its definitely a success.

Even Tony Mamo uses one on his own personal engine build

https://ls1tech.com/forums/generatio...ker-ready.html

Apparently some GM cars were equipped with them in the 80's because since the cars could not make enough vacuum on their own. I'll take that with a grain of salt till its proven though.

95ONE

iTrader: (1)

Good lord I can't wait to post my build. Following most of What's stated to a T and beyond. I won't know until March. My biggest unknown is my heads. (big unknown I understand) MOST everything else I have goes above and beyond what anyone is saying here. Now after saying all that, watch me dyno something terrible.

35thAnniversaryPhil

iTrader: (1)

Just looking at your mod list, you are on the way! When you get your numbers please post them up here, you would be the first one.

35thAnniversaryPhil

iTrader: (1)

Found out that Chris1313 2002 Camaro with an automatic transmission gets 522rwhp and 440rwtq!! This is all through an automatic transmission! Mind you it has a 4000 stall and is locked during dyno runs which I suppose makes it almost like a manual in terms of power loss.

https://ls1tech.com/forums/dynamomet...4-10-11-a.html

Anybody else here on LS1Tech mange to get over 500RWHP besides PatG and Chris1313?

Patrick G

iTrader: (14)

High compression, really efficient heads/intake and a tune that was dialed in to the 'nth degree made the difference. Compression is your friend when it comes to torque production. We pushed the envelope on compression and quench with my build. The big torque number was the reward.

J-Rod

We made 503 RWHP with Tommy's car with a LG G5X3 package (ported 243's milled to 55cc, FAST 90, etc...). Pat tuned the newest combo which has a 244/248 LSK lobed / AFR 205's setup that is ~510 RWHP as best I remember. Pat probably has a dyno sheet somewhere for it.

Patrick G

iTrader: (14)

That Corvette was a beast. Still the fastest 346 I've ever driven. Ran 10.20s if I recall correctly. Regardless, it was a totally legit 500+rwhp LS1. Great car.

Rare96LT1Formula

iTrader: (32)

When I initially purchased my WS6, I had 500 rwhp goals in mind. While I'm not nearly as stuck on that number as I once was I still wouldn't mind hitting it! The combo I've been looking at is as followed.

Kooks 1 7/8" LT's
Custom Y-Pipe (At least 3.5" merge)
Borla Catback
Advanced Inductions 243's (Sodium valved)
Advanced Inductions Cam (Undecided which one atm)
Fast 90/92 - Maybe 102 (Possibly have it ported..)
ATI Underdrive Pulley
Monster Stage 3 w/ Lightweigh flywheel
4.10's
ARP bolts everywhere!


The AI package is what really is intriguing for me. Hoping to make over 450 to the rear wheels with nice street manners. We'll see. Build thread to follow this spring with all parts are ready.

95ONE

iTrader: (1)

[QUOTE=J(ported 243's milled to 55cc, FAST 90, etc...)[/QUOTE]

Holy crap. How much did he have to mill the head to do that?

35thAnniversaryPhil

iTrader: (1)

I knew it! and now for the key questions;

-What combustion chamber size and head gasket does it take to get 12:1 compression?

-What max compression can a stock LS1 bottom end handle?

Its a privileged to have your expert opinion posted Pat, thank you very much! I have updated the list to include a cam spec'ed out by PatG if you want the best possible chance of hitting 500rwhp.

35thAnniversaryPhil

iTrader: (1)

Updated the list!

I suppose the target to shoot for is ~12:1 compression on a stock LS1 bottom end. I put "X"'s for the combustion chamber size and gasket size until PatG says how much we need to get that 12:1 or + and how much the stock bottom end can handle.