superkingd
Newbie
kind of related but I BELIEVE top fuel dragsters use no head gasket, No water to worry about either. But I could be wrong
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
i've heard a ''rumor'' 1 to many times
- Thread starter blazin_blazer
- Start date
fmstruck
1/2 ton status
Wrong. Not only do they use a head gasket, it's part of their tune up. They use a thicker/thinner one to raise/lower compression ratio depending on conditions.
I can tell you for a fact that a fresh 350 chevy will run with no head gaskets. One of my students did it last year in my engines class. He set the heads on at the end of class one night to paint the motor and never bothered taking them back off to put the gaskets in, just torqued them down the next time our class met. It ran, not good mind you, but it ran. We ripped the heads back off as soon as we noticed it and in that 5 minutes after we shut it off it had already started to rust pretty bad.
4xcrazy
3/4 ton status
got a thick assed copper one hangin up around here from the track i found from one of these guys, it blew out. heavy bitch too.
superkingd
Newbie
El Larry
Registered Member
Maybe off topic, a guy across the way from my work was working on a couple year old UPS nascar that his customer bought, it was turn-key. I got to watch him hot-lap it in the parking lot(big one).......all I can say is Holy Smokes! Everytime he would get on the throttle the car would kick the rear end out sideways like nuthin, and the sound was HEAVENLY!!!!!!
WannabeRacing
Registered Member
Yes, top fuel cars use head gaskets. Always have and always will.
The O ring and copper gaskets is getting to be a thing of the past for everything under top alcohol. In recent years with the MLS and like technologies, bigtime engines have been switching over to the MLS styles and getting away from oringing the heads and blocks. You won't find many, (if any), NHRA or IHRA pro stock engines running copper. Comp eliminator or the NASCAR scene. Even huge blower pressure and turbo stuff is sealing just fine without o-rings. I have a ton of O-ringed blocks that people avoid like the plauge because they are finished with running O-rings.
The tolerances in the machining are that good that you can go without them, the problem comes in the expansion of different materials. And when you are talking about an iron block and an aluminum head, you cannot get them to move/expand together. You just can't. And thus the need for head gaskets. Even different types of aluminum or cast iron. Some engines have o-rings in the intake and thus run without gaskets, but that gets expensive and hard when you want to switch different set-ups on the dyno. Gaskets are cheap and easy.
Now, the tolerances are so good inside a nascar engine that they will run with water insead of oil WAY longer than you think they would.
Hey Larry, what is the boat?
The O ring and copper gaskets is getting to be a thing of the past for everything under top alcohol. In recent years with the MLS and like technologies, bigtime engines have been switching over to the MLS styles and getting away from oringing the heads and blocks. You won't find many, (if any), NHRA or IHRA pro stock engines running copper. Comp eliminator or the NASCAR scene. Even huge blower pressure and turbo stuff is sealing just fine without o-rings. I have a ton of O-ringed blocks that people avoid like the plauge because they are finished with running O-rings.
The tolerances in the machining are that good that you can go without them, the problem comes in the expansion of different materials. And when you are talking about an iron block and an aluminum head, you cannot get them to move/expand together. You just can't. And thus the need for head gaskets. Even different types of aluminum or cast iron. Some engines have o-rings in the intake and thus run without gaskets, but that gets expensive and hard when you want to switch different set-ups on the dyno. Gaskets are cheap and easy.
Now, the tolerances are so good inside a nascar engine that they will run with water insead of oil WAY longer than you think they would.
Hey Larry, what is the boat?
El Larry
Registered Member
Its a 1970 Belmont flatbottom, 18'4. has a 390 FE in it, just a ski boat, does 60mph, plenty fast for me.Just got the seats done. You into flats?
Hey Larry, what is the boat?[/QUOTE]
Hey Larry, what is the boat?[/QUOTE]
WannabeRacing
Registered Member
Big into flats. I just did a revenge K boat. Just finishing a D'cucci pro stock boat. I have three Biesemeyers, an old ski boat Hallett, and a twin turbo Schiada 21'. And as ever, all boats HAVE to be v-drives!
WannabeRacing
Registered Member
Well DUH! Just figured out who you were.
Thought that name looked familiar.
Thought that name looked familiar.
LOGANSTANFORTH
1/2 ton status
nice twin turbo 24 valve.....i figured you were running the 24 valve head on the 12 valve in your chevy thats why i asked if it was a p-pumped 24 or 24 head on a 12 block......
DEMON44
Low-Tech Redneck
na, the 12v in my chevy is a 12v through and through. my last dyno with the 24v was 606 rwhp on straight #2. I never did put the gas too it. but it have DDP comp 250+ sticks. 62 liter per hour. if I dialed back the injectors and put the nitrous to it I'm sure it'd have been outrageous.
when I ring the 12v head I'll port it up some, but I'm not worried about that too much. the 12v it going to stay big single. I'm gonig to get a holset off a new DD15. I measured one up at work. It'll be perfect. it measures 68/71/13. no wastegate. no VNT actuation, no VGT
when I ring the 12v head I'll port it up some, but I'm not worried about that too much. the 12v it going to stay big single. I'm gonig to get a holset off a new DD15. I measured one up at work. It'll be perfect. it measures 68/71/13. no wastegate. no VNT actuation, no VGT
super10brss
1/2 ton status
Oh my 
...... you guys doin it up..... guess when I built my little 350 small block I didn't know what I was getting into with the mls gaskets.... guess a bling squirrel can find a nut every once in a while..... cool huh 
...... you guys doin it up..... guess when I built my little 350 small block I didn't know what I was getting into with the mls gaskets.... guess a bling squirrel can find a nut every once in a while..... cool huh
DEMON44
Low-Tech Redneck
much like this 'eh...........this was my point. theres no "head gasket" fire rings, perimeter seal, 2 shims, and 13 orings......... not exactly a "head gasket" this is effectively what oringing a head with stainless wire nets you. a virtually positive seal at the fire ring. and the rest of the HG just to fill space and keep water and oil from running buckwild.
much like this 'eh...........this was my point. theres no "head gasket" fire rings, perimeter seal, 2 shims, and 13 orings......... not exactly a "head gasket" this is effectively what oringing a head with stainless wire nets you. a virtually positive seal at the fire ring. and the rest of the HG just to fill space and keep water and oil from running buckwild.
It's been a few years now since I've worked on any 2 stroke Detroits, I kinda miss 'em. I've worked on a lot of 6V92TAs and would much rather work on the wet liner engines than those 71s.
Gus
