Originally Posted By: expat
OK, so this is not an OLD Jag as in somthing from the 60's
it's a more modern Ford based Jag.
You have low compression in two cyls.
What can cause low compression.
1) poor Valve seating, as in Burnt or bent valves.
No additive would help here.
2)Scratched/Scored cyl walls (this is where products like Restore might possibly help. But howdidtheyget scratched.
3) Broken piston rings,that could cause the scratching, but I'mnot sure if Restore would help.
4) Stuck piston rings. Rings can stick especially if the car has been layer up or mantenance has been sketchy. Some additives can help here, but once the rings are un-stuck, they would be no longer required.
The above is simplified, but may give you an idea where to start looking to BEST resolve the problem.
I have used additives, but I have used them to rectify a specific problem. ie. stuck rings or an engine that so so worn I havenothing to loose, and just need to get another 2k out of it and cut down onthe smoke screen as I drive through town.
Sorry you got less than awarm welcome here, but please stick around, you may learn why some people were so quick to deride your approach to additives.
Restore contains copper,silver and lead. Once the filter has been overwhelmed and goes into by-pass(those elements aren't small enough to go thru the media)what's left fills in the scoring on cylinder walls. However it is short lived and quickly wears off.
These elements also clog oil passages because they are basically a sludge and drop out of suspension.
I've personally seen what that stuff can do,which is why I never recommend it's use.
My guess is cylinder walls are scored and is the reason there is low compression.
Originally Posted By: jagtuner28
I know, they aren't the coolest mods but they have done something for me. I did manage to get 39hp out of what I've done so far according to the dyno, and my electricals work wonderfully thanks to all the grounding especially when I've got everything turned on. That might not be cool to you but for an old Jag owner electricals that work well are a beautiful sight.
.
I find it extremely had to believe you had this car dynotuned. Sorry.
Exactly what model are you talking about.
And 40hp is a serious jump and from experience it takes heads,cam and intake to get those kind of numbers,unless it's boosted. With some tweaking 40 hp can be had with boost however fuelling would need to be addressed.
Look son,most of us here are for real. Real world builds,real world tuning experience and telling stories here will quickly get you flamed. So just don't do it.
If you've put restore in your engine drain it immediately and do a coupe drain and fills with a cheap conventional to get as much of it out as possible. If you've got low compression miracle in a can isn't going to do anything other than empty your wallet. Save those dollars for a rebuild or new engine.
And be honest. Good grounds. Like come on man
