Utah Evos
Hi Again ... Thanks regardless for your support Jake ...
lolz ... I think there should be a SAE certification a cam manufacturer should be able to stamp on their cams 'before' slapping a magical number on them and shuffling them out the door.
From my turbo research overlap is 'the' killer in getting the most out of a forced induction motor. So I put down a small list of potential cams, and saw this:
GSC S1s are Intake 11mm and Exhaust 10.5mm lift on a 268 lobe. So that supported the idea of a smaller Exhaust lift in order to promote a little more low end flow to get the turbo spooled. Turbo spooled = usable power now.
Cosworth M1s are 10.2mm Intake and Exhaust on a 268 lobe.
... and ... here's where it gets interesting:
Comp Cams 280+ are 11mm Intake and 10.4mm exhaust with basically a 264 lobe.
That really made me sit back and think.
Last year I met another black evo driver in Odgen that mentioned he was tuning up a set of Comp Cams 280+ and really liked them. A 280 duration really seemed like overkill for a street setup, but after seeing those numbers I realized Comp is using the 280 number as advertising 'not' as how the cam is necessarily setup.
~j.
lolz ... I think there should be a SAE certification a cam manufacturer should be able to stamp on their cams 'before' slapping a magical number on them and shuffling them out the door.
From my turbo research overlap is 'the' killer in getting the most out of a forced induction motor. So I put down a small list of potential cams, and saw this:
GSC S1s are Intake 11mm and Exhaust 10.5mm lift on a 268 lobe. So that supported the idea of a smaller Exhaust lift in order to promote a little more low end flow to get the turbo spooled. Turbo spooled = usable power now.
Cosworth M1s are 10.2mm Intake and Exhaust on a 268 lobe.
... and ... here's where it gets interesting:
Comp Cams 280+ are 11mm Intake and 10.4mm exhaust with basically a 264 lobe.
That really made me sit back and think.
Last year I met another black evo driver in Odgen that mentioned he was tuning up a set of Comp Cams 280+ and really liked them. A 280 duration really seemed like overkill for a street setup, but after seeing those numbers I realized Comp is using the 280 number as advertising 'not' as how the cam is necessarily setup.
~j.
Never compare cams with advertised duration, Duration @ .050 will be closer, but not exact because of ramp rates.
As far as the comp 280 cams, they have an agressive ramp rate that delivers a very strong low end charge...off boost torque is big. This ramp rate makes for a slightly noisy valvetrain as well. The powerband can be manipulated with gears to give slightly more top end, but the car seems happiest when they are installed straight up.
If you want, you can take mine out for a spin to see if you like them.....After I put it back together of course.
https://www.evolutionm.net/forums/sa...r-cdi-cop.html
Buschur CDI COP. 700 obo.
Buschur CDI COP. 700 obo.
I've got the head off & am doing a few things to give the engine itself a higher threshold for detonation...may be able to get even more aggresive with the tune now. I'll probably throw some solid suspension bushings in while it's in the air....May as well get the battery in the trunk too. Toying with the idea of direct port injection for the meth as well...projects, projects
How's the M3?
It's going in on re-assembly, I can't wait to see how it works out I've got the head off & am doing a few things to give the engine itself a higher threshold for detonation...may be able to get even more aggresive with the tune now. I'll probably throw some solid suspension bushings in while it's in the air....May as well get the battery in the trunk too. Toying with the idea of direct port injection for the meth as well...projects, projects
How's the M3?
I've got the head off & am doing a few things to give the engine itself a higher threshold for detonation...may be able to get even more aggresive with the tune now. I'll probably throw some solid suspension bushings in while it's in the air....May as well get the battery in the trunk too. Toying with the idea of direct port injection for the meth as well...projects, projectsHow's the M3?
after months of dealing with dmv will finally have plates etc tomorrow..sons of *****es work slower then molasses if you don't have the title. I put a few things on the car but need to order some longtube headers ..raceline lol $120 and then build a custom 3" exhaust to go with itIf anyones got a younger model E36 I bought the wrong black kidney grills they don't fit the 99 coupe
It's going in on re-assembly, I can't wait to see how it works out I've got the head off & am doing a few things to give the engine itself a higher threshold for detonation...may be able to get even more aggresive with the tune now. I'll probably throw some solid suspension bushings in while it's in the air....May as well get the battery in the trunk too. Toying with the idea of direct port injection for the meth as well...projects, projects
How's the M3?
I've got the head off & am doing a few things to give the engine itself a higher threshold for detonation...may be able to get even more aggresive with the tune now. I'll probably throw some solid suspension bushings in while it's in the air....May as well get the battery in the trunk too. Toying with the idea of direct port injection for the meth as well...projects, projectsHow's the M3?
Sounds like Comp 280s for me.
On your suspension ... if you want the EVO to handle about 100 percent better, there are only two rear bushings you need to worry about. Both are on the rear main control arm that you adjust the camber in the rear. One is a bugger to press out as its metal sleeved, but a socket and a press make short work of it ... and if you still have the press, put a tiny bit of lube on the bushing going in and "blooooop" it pops right in. The rear actually wants to oversteer very quickly in a stock Evo. The bushings help a lot. The ride height is I think 13.625 inches from hub center to stock fender lip.
The other trick is to actually get the car at the proper ride height. From the factory, the factory ride height is right in the center of bad juju land. The camber curve at the factory setting is probably the worst place it can be, and makes the car exhibit a lot of bump steer. Once you move it down a little (from center hub to "stock lip" of measurement of 13.5) the camber curve is in the proper place. Properly sized springs can do this, and if you have perch adj. coil overs they can do this also.
Enjoy!
~j.