I will get some more pics posted as soon as i get a chance
Had another spot of free time. car came with what I was told were ZC cams and a head both spares not installed. head was tore down and didn't have quite that much time. also came with a ZC intake manifold installed and original d16a1 as a spare. I measured the spare cams and the cams in the engine and the spares were stamped pm7 and measured .030" approx taller lobes. I decided that I would put them in. road tested after to verify everything was good.
Seems to have less power but I don't have a dyno. And I did not alter the tune. So that might explain that. it does seem to keep pulling to a higher rpm 7k instead of getting weak around 6.5k.
I used the dowel pin holes in cams to time them and the d16a1 stamped steel cam gears. all my marks lined up but it maybe a matter of cam timing by a few degrees. Because I also received a set of small cam gears that I don't have a matching crank gear for.
Either the increased lift is helping but no tune to take advantage of it or the air mass has slowed down with the increased valve opening and it is hurting. once the supercharger is on I can only imagine the extra lift and from what the "internet" says 12 degrees longer duration.
I wanted to get the stock cams out so they could get reground.
after that was finished I started screwing around with eliminating brake booster. I down't have material yet to remove the booster so I disconnected and capped booster hose from intake. Road tested to see what I was getting into.
Takes quite a bit of pressure but can still lock up front. But it was easier to modulate on the edge of lock up once I got the hang of it.
Stock pedal ratio is 4.54:1 . I removed the brake pedal welded original hole shut and redrilled new hole at 1.85 " (stock is 2.2" ) changing pedal ratio to 5.4:1. it only marginally increased pedal travel, made a (guess) 25 lb difference in pedal pressure to lock up.
My hope is that with 3 mm larger front calipers from 90 crx Si (rotors to match) and yellow stuff pads lock up with still be controllable but with lower pedal pressure.
Keeping stock 13/16" master cylinder (replacing with new) and with 3mm larger calipers pedal travel should increase by approx 3/8" .
Need to find 14" or 15" wheels before I can change calipers (I think).
My wheels are 13x5 I don't think I will fit 9.5 rotors inside 13" wheels but if someone has please chime in.
That's all I have for now.
Edited by crxracer87si, 04 September 2018 - 11:33 AM.