Jump to content
The mkiv Supra Owners Club

cylinder head


jagman

Recommended Posts

  • Replies 77
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

Clutching at straws CJ ...Im sure Jagman Will do a top job and check everything before it goes back together. Just a case of when its back on the road getting tuned correctly and enjoying it ...Bout time you had some luck :)

Alos looking forward to some build up pics from Jagman...will be very informative for the BBS:respekt:

 

 

PS Slowdog...Amended for you :tongue:

Link to comment
Share on other sites

Thanks Mig :thumbs:

 

I am sure Adam will do a first class job too :respekt: It is just so fecking frustrating when you think you have got somewhere then :twak: something else comes and smacks you. :(

 

Ah well, at least now it will be almost a complete new engine when it is finished. Plished and ported head, complete new head set, re-bored cylinders, new pistons and rings and new rods too. :woot: :D

 

Oh, and a new EMS to boot!! :rich:

Link to comment
Share on other sites

Look forward to seeing her go again ...All the best with it . More money than sence you LOL but respect for the comitment :thumbs: Unfortunately thats the world of modding ..always something to catch you out ....but just have patience and you will be fine

Link to comment
Share on other sites

Could it be anything to do with the E-manage system? Or am I now clutching at straws trying to find reasons? :(

 

Can't see it being that. You didn't even have it mapped did you?

 

It affects individual injectors but only to the point of extending an injector signal. The stock wires aren't cut (like the ignition ones are) but are simply tapped into. The only scenario I can see is if it was mapped, used additional injector duty a lot, and the wiring on injector #6 was bad. I don't think that's a likely scenario for your problem though.

 

It's be great if you found a failed injector, in a strange way, as then you'd know for sure what caused the problem...

 

-Ian

Link to comment
Share on other sites

Guest slow dog

sorry how can you pm people on how good i am if yo have not had a good word to say about me on here.........

sorry mate but since i put the post up about oxys engine i got hammered for it. so i stopped putting pics up and talking about my work and now i just leave

it for the people that have work done on there cars to decied.

for the simple fact that if there happy with the work no one can moan at them and people can read about how happy they are

and to be honest mate you have done me a favour cause now i do that bit more for people on here like do over 100 miles to fix cars work 7 days a week so people that cant leave work on a week day

charge low rates

really go out of my way

and i dont sit here going on about how this should be done and what to do and not to do.

i just get on and do it my way and so far i have had 0 complaints and alot of happy people.

 

so please stop pming people on how good i am until you have seen my work

cause to be honest you dont know how good i am so you are just lying to them :D

Link to comment
Share on other sites

Just been thinking, (probably a dangerous thing :looney: ) and was curious about something.

 

I know RLTC cuts fuel to a cylinder and that any small amount of fuel that is present just gets dumped out the exhaust. I was just wondering, is there anyway at all that this could fail and cause this type of problem?

Link to comment
Share on other sites

Ahh ... the joy of iridiums and their exposed tips. They're great for supressing detonation I found, but once you get passed that level you can say hello engine damage.

 

That nackered valve looks just like one on an MR2 I know that chewed up an iridium plug.

 

I'm going with cheapo NGK copper grade 8 plugs and change them every oil change next :)

Link to comment
Share on other sites

Ahh ... the joy of iridiums and their exposed tips. They're great for supressing detonation I found, but once you get passed that level you can say hello engine damage.

 

Not sure why is everyone banging on about Iridiums, since CJ said this:

 

I hadn't used Iridium plugs for some time and had been running the NGK's.
.
Link to comment
Share on other sites

I know CJ's nightmare looks like it's begun with a gammy injector or poss moody/dry splice for onto #6 emanage injector duration loom, just curious from you guy's exstensive modding track records is there anyway a Knock Monitor or EGT sensor could have given CJ enough warning to avoid this damage or are we talking split second/only a handlful of engine revolutions therfore unavoidable? What sort of boost levels does CJ run?

Link to comment
Share on other sites

I know CJ's nightmare looks like it's begun with a gammy injector or poss moody/dry splice for onto #6 emanage injector duration loom, just curious from you guy's exstensive modding track records is there anyway a Knock Monitor or EGT sensor could have given CJ enough warning to avoid this damage or are we talking split second/only a handlful of engine revolutions therfore unavoidable? What sort of boost levels does CJ run?

 

Good question. Would only one cylinder going lean have bumped up the EGTs enough for it to register? The det would have been apparent but knock sensors I've heard aren't all that, something about mechanical noise above 4000rpm throwing them off...

 

-Ian

Link to comment
Share on other sites

Guest Terry S

There is a device called a Knock Link that you can "tune". It displays a row of LED's and has it's own sensor. Use a set of Det Cans to set it up. Pete Betts sells them

 

Chis, you would need 6 x EGT sensors

Link to comment
Share on other sites

So Pete Betts Knock Link can be successfully "tuned" to distinguish det from above 4k mechanical noise. I recall seein in an old HKS catalouge their brand Knock Monitor which apparently with the aid of an built in noise filter which silences all engine noises except the frequency at which det occurs, anyone had experience with this, is Pete Betts a cheaper option?

 

6EGT sensors! :eek:

I take it that would require x6 mods to head or exhaust manifold to fit the all the probes, so for serious precausions to safeguard your engine can start costing as much as the repair bill! typical!

Would you then need x6 guages! Try keeping your eye on x6exhaust temp guages whilst ragging the tits of car you'd need so many guage pods you be in a situation where you'd have to worry bout seeing where your actually driving! Unless they can all be linked to some form of warning system i guess.

Link to comment
Share on other sites

Guest Terry S

Never tried the knock link, keep meaning too.

 

6 x EGT's would be a royal PITA, and they would each need to be exactly the same distance from the head

Link to comment
Share on other sites

sorry how can you pm people on how good i am if yo have not had a good word to say about me on here.........

sorry mate but since i put the post up about oxys engine i got hammered for it. so i stopped putting pics up and talking about my work and now i just leave

it for the people that have work done on there cars to decied.

for the simple fact that if there happy with the work no one can moan at them and people can read about how happy they are

and to be honest mate you have done me a favour cause now i do that bit more for people on here like do over 100 miles to fix cars work 7 days a week so people that cant leave work on a week day

charge low rates

really go out of my way

and i dont sit here going on about how this should be done and what to do and not to do.

i just get on and do it my way and so far i have had 0 complaints and alot of happy people.

 

so please stop pming people on how good i am until you have seen my work

cause to be honest you dont know how good i am so you are just lying to them :D

 

 

EDITED as i dont want to go of tangent...Dont worry Slowdog...Im nice but not that nice ..so you dont have to worry about it .

Link to comment
Share on other sites

6 x EGT's would be a royal PITA, and they would each need to be exactly the same distance from the head

 

If you had the manifold off the car, say when your fitting a single with a budget kit, it would only take a decent machine shop an hour to drill and tap 6 1/8 NPT holes. If using a tubular manifold its not much more trouble to have the 6 bosses welded in.

 

The problem would be feeding them all into a single gauge. Some sort of interface would be required that samples them all and always feeds the highest to the guage, maybe with some sort of LED indicator with peek hold as to which cylinder is currently being monitored and which one had peek temp.

 

Sorry to digress from the original topic.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.