stage 2 cam
#6
you can just use a really large screwdriver and pry down the valves a wee bit to get the rockers out (be sure to adjust the crank beforehand so u dont bang on ur pistons) take the cam off and slide the new cam in place (dun forget assembly lube an semen) and run it at 2-2.5k rpm for 20 minutes.
Whatever you do don take ur towers off unless you know a shop that can align hone for cheap....and the answer is no cuz they're expensive.
Whatever you do don take ur towers off unless you know a shop that can align hone for cheap....and the answer is no cuz they're expensive.
#7
oh and prying you have to pry on the edge of the valve keepers just to get it to go down so its a huge PITA to get them down so use a really fat flathead thats how i did it AND DONT LOSE THOSE LITTLE TEENIE DOOHIKITIES that get pushed down by the rocker arm. i wish i could think but i went to bed at 4 and had to work at 10 and man what a shitty day so far EXCUSE FOR TODAY
#8
#16
The only L-series head that got hydraulic lifters is the P90A turbo head. Also, with the hydraulic lifters, you can't use a standard camshaft.
And I believe the "E30" cams with "A" stamped on the back are the ones that are the hot ticket for turbo motors.
And I believe the "E30" cams with "A" stamped on the back are the ones that are the hot ticket for turbo motors.
#18
A cam will work with the stock EFI, but you have to remember that the computer gets it's reading from engine vacuum, and an overly large cam does not produce much vacuum as compared to a stock or mild cam.
I believe this can be band-aid fixed by adjusting the AFM.
I believe this can be band-aid fixed by adjusting the AFM.
#19
Hum... I think I know what you MEANT to say, but the computer doesn't get it's readings from vacuum, otherwise there would be a MAP Sensor instead of an AFM.
More than anything, performance cams change the valve timing & height. Combined with a good quality exhaust, intake, ignition, and adjusting the AFM / CHTS, you've got a greatly tuned street machine.
More than anything, performance cams change the valve timing & height. Combined with a good quality exhaust, intake, ignition, and adjusting the AFM / CHTS, you've got a greatly tuned street machine.
#22
Yes, it will work w/ a stock ecu (but there is more potential w/ a stand alone or upgraded ecu).
Here's the info on AFM adjustments: https://www.zdriver.com/forums/240z-280zxt-s30-s130-tech-tips-275/js-how-rebuild-your-afm-15277/
Those links are pretty old & I don't think they work anymore, so here's a MS Word document on the how-to.
Here's the info on AFM adjustments: https://www.zdriver.com/forums/240z-280zxt-s30-s130-tech-tips-275/js-how-rebuild-your-afm-15277/
Those links are pretty old & I don't think they work anymore, so here's a MS Word document on the how-to.
#23
most often your hurting more than helping running a hopped up cam with the stock EFI. If you cant adjust your AFR using a cam is worthless. Theres really only band-aid fixes for that using the stock EFI.
If you want to have a cam and actually use it go carbs or tunable ECU.
If you want to have a cam and actually use it go carbs or tunable ECU.
#24
my head says p90 on the side, how do i know if it's the 90 or 90a? i read somewhere on here the p90a isn't stamped as such, that you have to look at something once the valve cover is off? what am i looking for? forgive me i'm a noob to modifying these cars, but i friggin love em.
#25
my head says p90 on the side, how do i know if it's the 90 or 90a? i read somewhere on here the p90a isn't stamped as such, that you have to look at something once the valve cover is off? what am i looking for? forgive me i'm a noob to modifying these cars, but i friggin love em.
The only discrepancy is that some of the early 82 heads are stamped P90A but have solid lifters