The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

16 leaky valves = loss of power ?

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Goobdog

15+ Year Contributor
163
6
Jul 14, 2004
Louisville, Kentucky
I lifted the head on my GSX and blew the headgasket so while I had the head off I decided to get it checked out. I took it to my machinist and he said the valves were never lapped in correctly and they didn't seal up. I took this car to they dyno before and it made a whopping 218 whp with a b16g, 3 inch exhaust, ported exhaust manifold, ported o2 housing @ 17psi. The afr was 11.4 which wasn't too bad. I was really disappointed in the car because my other car with only a 14b, 2 1/2 inch downpipe with the stock exhaust stuck inside of it and ported exhaust manifold made 243 hp @ 18psi with an afr of 11.4 also. Would those leaky valves cause that much of a power loss ? Should be a no brainer but i'm an optimistic person :|
 
Goobdog said:
Would those leaky valves cause that much of a power loss ? :|

Sure.

If this is the first time the head's been off the car, you'd have to give it a once-over anyway. My brother bought a 1g with a billion miles on it, supposedly with new rings, but it didn't feel right. It happened to blow a valve on the highway, so I re-did the head, and then it pulled like a sumbitch with $300 in mods. Felt like a new car. I loved zipping around with it while I had it. A rinky-dink 14b won't win many races, but it sure is fun having full boost at 2500rpms.
 
I know what a 14b is capable of. A typical one in a typical person's hands will not win many races against cars that are actually fast. "Fast" being a subjective term. Looks like you were too busy stroking yourself to see I wrote that the 14b car pulled like a sumbitch with cheap mods.

Good job not bothering to answer the original poster's question, too. Try not to be such a smartass/dumbass in the future.
 
1993eclipseGS said:
deusxmachina said:
Sure.
A rinky-dink 14b won't win many racesQUOTE]

Haha another one of those guys that goes and gets a $1,300+ turbo and then runs high 13's probably ROFL

A rinky-dink 14b has gone 11's numerous times already. My buddy ran a 12.6 with an exhaust, fuel pump, and boost controller. :tease:

Do you think they run 11's with the same mods a '1300' dollar car would run?..With the supporting mods you would need to run 11's on a 14b you would end up spending around the same amount as you would on a larger turbo..Also,not to even mention the driving it takes to pilot a 14b into the 11's either..Basicaly,the people running 14b's have alot of mods that you wouldn't need right away with just a '1300' dollar turbo..If it was that easy to get into the 11's with a 14b then don't you think we would be hearing about it all the time?..Everytime someone does it's like the first solo flight across the atlantic and the word gets spread throughout the dsm community like a wildfire..I'm not fighting with you,but merely stating that 11's with a 14b isn't a walk in the park..
 
my rinky dink 14b makes me faster then about 90% of cars out on the street :shhh:

but to answer your question: most definately.

if your valves aren't sealing correctly, chances are your compression is lower then it should be, therefore yielding less power then it's capable of.

just have the machine shop fix it. get a new headgasket while you're at it and arp head studs if you don't have them already.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Latest Classifieds

  • For sale 2g 2G Mishimoto Radiator & Fan Shroud
    2G Mishimoto Radiator & Fan Shroud $200 + shipping and paypal feesYou must be registered to...
    • jersygsx
    • Updated:
    • Expires
  • For sale 2g 2G Power Window Switches ( tested and hardware included )
    2G Power Window Switches $55 + shipping and paypal fees* Tested 6/2/26 * Hardware included *...
    • jersygsx
    • Updated:
    • Expires
  • For sale VIRGIN 4G63 6-BOLT TURBO HEAD
    Came off a virgin stock AWD Auto 1G DMS (91), also have matching block and crank which are also...
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale 1G DSM 4G63 6-BOLT TIMING COVER
    Used, see condition in photos. Buyer covers shipping / fees.
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale Garage clean out
    Changing setups on the car and getting rid of some stuff as well that's been laying around. Will...
    • 92GSXtacy
    • Updated:
    • Expires
Back
Top