head porting?
- Thread starter bowtiebuba
- Start date
whenmunkysfly said:
i love turbos to, it makes sence to me just fine and im not scared of that much power ive been arould the block with the whole nitrous thing on my caprice and i dont nun a small 100 shot of that.:naughty:
Adjuster
Supramania Contributor
I hear the worries about wearing out the cams faster...
Keep this in mind. These springs are not that agressive really. (Not much more than the stock 2JZ pressures IIRC.)
The coil bind is better even though the springs are slightly longer than stock, but the wire is smaller diameter, and it allows for more spring compression before coil bind as a result.
We checked a stocker v/s the Comp Cams BBC inner valve spring, and it was better in every way than the stocker for performance.
They are not so agressive your going to float a valve at maximum TCCS RPM, and I'd say you could rotate this engine with these springs to 7500rpm with few if any problems.
For the money, there is no better alternative that I know of spring wise.
Valve stem wise, the shop doing your valve job will just file/grind down the ends of the valves to get the right clearance value for each valve. (They have to do this anyway when the seats are cut, it changes the overall length of the valve when seated v/s the end of the stem, and that changes the cap/lifter/shim to cam lobe clearance.)
Keep this in mind. These springs are not that agressive really. (Not much more than the stock 2JZ pressures IIRC.)
The coil bind is better even though the springs are slightly longer than stock, but the wire is smaller diameter, and it allows for more spring compression before coil bind as a result.
We checked a stocker v/s the Comp Cams BBC inner valve spring, and it was better in every way than the stocker for performance.
They are not so agressive your going to float a valve at maximum TCCS RPM, and I'd say you could rotate this engine with these springs to 7500rpm with few if any problems.
For the money, there is no better alternative that I know of spring wise.
Valve stem wise, the shop doing your valve job will just file/grind down the ends of the valves to get the right clearance value for each valve. (They have to do this anyway when the seats are cut, it changes the overall length of the valve when seated v/s the end of the stem, and that changes the cap/lifter/shim to cam lobe clearance.)
well i gonna be poping down to shop and order some spring's and try this for my self my last mec told me about this and it is tue it will were out the cam caps faster
but i was talking to buddies at the shop and they have found abaring that may fit our cam caps and still use the stock size you have to line hone the head thou
will find out later on ps i doing the 2j vavles as well and going cusomt cams once again just litte meaner this time and mabye use this lift to my avnge so i can spin my head easly
but i was talking to buddies at the shop and they have found abaring that may fit our cam caps and still use the stock size you have to line hone the head thou
will find out later on ps i doing the 2j vavles as well and going cusomt cams once again just litte meaner this time and mabye use this lift to my avnge so i can spin my head easly
keep your finger cross i really hope this baring thing will work i have my douights thou case i fit was that easy some one whould ahve done ti by now
Adjuster
Supramania Contributor
Your talking about bearings for the cams?
I coated mine with molydisulfied, and it seems to have worked pretty good. (It helps to restore the worn cam caps, but does not add so much material that your going to get too little clearance there.)
If you could get roller bearings like they use on marine engines, that would be awesome! It would be expensive however. You might pick up a few ponies at the dyno, and your fuel economy would improve too I'd think. (Less drag to turn the cams.)
I coated mine with molydisulfied, and it seems to have worked pretty good. (It helps to restore the worn cam caps, but does not add so much material that your going to get too little clearance there.)
If you could get roller bearings like they use on marine engines, that would be awesome! It would be expensive however. You might pick up a few ponies at the dyno, and your fuel economy would improve too I'd think. (Less drag to turn the cams.)
Adjuster said:
the baring idea whould be pimp these baring are form a lawn mower as well hehehheh have yet to send the head ot my buddie yet but she said they should work if not coat them