L92 Valves
Thread Starter
Joined: Sep 2006
Posts: 307
Likes: 1
From: Poteau Oklahoma
L92 Valves Been seriously considering buying a set of bare L92 heads to put on my 408 project, but I haven't seen a good set of valves, and i preferably don't want to use stock valves. Anybody know of a vendor or sponsor that has a really good set?...also...if i end up using a 4'' crank, what PVT am i going to have using...say a 630ish lift cam? Im a noob with this L92 stuff, and espically a noob on motors over 346ci so any help would be great.
The lift on the cam has no effect on the PTV, the duration does. The stroke has no effect on it either. Unless you already have the pistons for this build, I would strongly suggest having a set of pistons custom made for the L92 heads. Don't ask me how I know 
I called Manley, and they are supposed to be releasing new part numbers
for their stock size 2.16/1.59 stainless valves in a few weeks.
The part numbers will be 11620 and 11621.
I was told that the intake will be a "race flo" necked down stem, and the exhaust will be a "race master" straight stem.
I hope they get on the stick so I can get my project rollin!
Jobber price is said to be about $20 bucks each, seems like a deal!
Does anyone have an opinion on the durability of a stainless valve in a twin turbo (800+HP) setup?
Ferrea does makes a 1.60 exhaust valve designed for a turbo application, so I may use the Manley 2.16 intake and the Ferrea 1.60 on the exhaust just
to be safe.
Any thoughts on this?
for their stock size 2.16/1.59 stainless valves in a few weeks.
The part numbers will be 11620 and 11621.
I was told that the intake will be a "race flo" necked down stem, and the exhaust will be a "race master" straight stem.
I hope they get on the stick so I can get my project rollin!
Jobber price is said to be about $20 bucks each, seems like a deal!
Does anyone have an opinion on the durability of a stainless valve in a twin turbo (800+HP) setup?
Ferrea does makes a 1.60 exhaust valve designed for a turbo application, so I may use the Manley 2.16 intake and the Ferrea 1.60 on the exhaust just
to be safe.
Any thoughts on this?
Originally Posted by Stang's Bane
The lift on the cam has no effect on the PTV, the duration does. The stroke has no effect on it either. Unless you already have the pistons for this build, I would strongly suggest having a set of pistons custom made for the L92 heads. Don't ask me how I know
I am curious what a big lift small duration or big duration small lift setup would do on one of these!
Originally Posted by Stang Killer
Been seriously considering buying a set of bare L92 heads to put on my 408 project, but I haven't seen a good set of valves, and i preferably don't want to use stock valves. Anybody know of a vendor or sponsor that has a really good set?...also...if i end up using a 4'' crank, what PVT am i going to have using...say a 630ish lift cam? Im a noob with this L92 stuff, and espically a noob on motors over 346ci so any help would be great.
Originally Posted by Forteen3GT
I am curious what a big lift small duration setup would do on one of these!
Id love to tell you "i'll let you know soon".............. but im sure .60x/.61x lift probably isn't considered big to most on here
Trending Topics
What's the pros and cons of stainless over regular steel? Will the aftermarket stainless be any lighter?
The Rev valves that are supposedly in the works, will they be stainless as well or will they be titanium?
Anyone make 2.16 titanium valves or possibly close to it and that could be turned down?
The Rev valves that are supposedly in the works, will they be stainless as well or will they be titanium?
Anyone make 2.16 titanium valves or possibly close to it and that could be turned down?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
How do you know? 
What happened, so I don't make the same mistake too.
What happened, so I don't make the same mistake too.
Originally Posted by Stang's Bane
The lift on the cam has no effect on the PTV, the duration does. The stroke has no effect on it either. Unless you already have the pistons for this build, I would strongly suggest having a set of pistons custom made for the L92 heads. Don't ask me how I know
Originally Posted by jtl12419
How do you know? What happened, so I don't make the same mistake too.
What happened, so I don't make the same mistake too.Ok... who has a stock valve to weigh... someone weigh one. Bret or Rick have yall done so?? What does an aftermarket 2.08 valve weigh for comparison??
Originally Posted by Dragaholic
What's the pros and cons of stainless over regular steel? Will the aftermarket stainless be any lighter?
The Rev valves that are supposedly in the works, will they be stainless as well or will they be titanium?
Anyone make 2.16 titanium valves or possibly close to it and that could be turned down?
The Rev valves that are supposedly in the works, will they be stainless as well or will they be titanium?
Anyone make 2.16 titanium valves or possibly close to it and that could be turned down?
REV just made me a set of intake valves for my L92's, 2.160 ,pro flow style swirl polished S.S. 104 grams @ $156 for the set. They had them done in 1 day. Nice valves.....
Oh yeah, my L92/L76 408 is running in my V with these valves.
Oh yeah, my L92/L76 408 is running in my V with these valves.
I bought a set of pistons second hand, they were new but cut for a standard ls1. Now the valve reliefs in them will not match up with my heads. I am now limited on my cam choices because of this,
