I finally got my cosworth cams & works springs/retainers installed. The car has been getting tuned for the past two days.

First impressions: After installing the cams and before retune, you notice lower power from 1k-3k rpms and more power after 5k rpms. The motor is a bit louder (especially after 3-4k rpm) and there is a slight increase in vibrations felt in the cabin through the pedals and steering wheel. The idle is pretty good, we did not tune for idle and it is still fine with just a slight lope - turning on the lights and aircon is no problem

Tuning: We dont have a load bearing dyno here, so we do things a bit backwords. We road tune and than put the car on a dyno to see the numbers. Fuelwise we got 95, 97 and 100 RON here, so I filled filled her up with 97 fro the tuning bit, although I plan on running 100 whenever I can. Rev limit was raised from the previous 7.8k to 8k rpm. as we started late at night and the battery of the lap top died on us, we werent able to get satisfactory results. We noticed that the car would not hold as much boost up top.

Today, the car was tuned after taking the restrictor pill out and crancking up the boost by 0.1bar from its previous peak. Now, I am able to spike to 1.8, hold 1.7 in mid rpms dropping to (from what I rememember while driving) 1.5bar in top rpms in upper gears. After some playing, the boost is coming on much stronger much quicker and holding better up top. The drive back after picking her up in HEAVY traffic was eventless, but if you drive your evo in ****loads of traffic like we have here in Istanbul, you might as well leave the stock cams, as they definitely will have more power from idle till 2.5-3k rpm

Now the good part: I just went for an hours worth of 'semi' sprited driving. With the boost upped a notch and the exhaust cams helping in higher rpms, she spins tires and hits the rev limiter in both first and 2nd gear On the highway, it is much quicker - it might be a good time to think about better brakes I am very happy with the way it turned out - mainly due to the long mapping session and the cams helping up top (hope she wont blow up on me with all that boost)

I dyno the car tomorrow, but it wont be a good before after comparison as my car was last dynoed in summer on 98ron map with 98ron fuel and 0.1bar lower boost. In any case, I will post the results just for the heck of it...


BTW: The guys at Works were very helpful and professional. shipment, return e-mails were prompt and answers given back detailed and usefull

 

before and after dyno sheets attached. the results confirm the but dyno - substantial gains - both peak and under the curve.

here is the lowdown

bone stock car
max torque: 353NM
max power: 280HP

before cams (with all the other mods in my sig)
max torque: 389NM
max power: 355HP

after cams + boost pill removal
max torque: 447NM
max power: 394HP

EDIT: I checked my boost gauge reading I recorded at the dyo run. on the dyno, it reads lower than on the street, but it held 1.7bar at around 4-5k and dropped to 1.4bar at 8k rpm

 

Very nice gains. I bet it feels great.

 

#'s sound impressive! Congrats bro

 

pretty impressive

 

Can I ask why you guys used 5th gear and not 3rd? (4th if its an MR) ? Especially since your dyno isnt load bearing and the most strain is in 5th gear ?

 

the only reason is that is what everyone else with the evo does.

all the people who get their stuff done at the shop I go to do it the same way on the same dyno. this way the results are accurate and easily comperable between each other.

 

pretty damn impressive...cant wait to get my cams from oliver ..

**** i still didnt place the order..

 

Maybe I missed it, but are both of these sets of numbers on the same gas?

 

You should definitely run only 100 if possible, as 100 RON is the equivalent of 95 octane U.S., and that isn't exactly race fuel. 97 RON is only 92 octane U.S., and that isn't quite the equivalent of U.S. pump fuel.

 

the guy is from instabul so i guess he has a Euro Spec EVO IX, meaning that he has a 6speed instead of a 5speed.

In Europe of IXs have 6 speed gearbox, not just the MR...

Great numbers, i have to say...

Do you think that if you used a bigger downpipe you could break 400whp? The HKS is very narrow...

 

Thanks for sharing your results and glad everything worked out for you!

 

first one was mapped on 98 ron fuel (around 92 octane) and run on 98 ron. second time, the car was mapped with 97ron (bit over 91) as they no longer sell 98ron and I used 100ron (equivalent of 93.5). Boost (as seen on defi gauges) was increased by 0.1 bar

 

You should only run the 100 octane RON gas if you intend to boost 26-27 psi 0n a regular basis. Do you have a knock monitoring gauge in your car or a way to log knock counts? EGT and AFR gauges are also useful, although not direct indicators. Be careful and turn the boost up incrementally while monitoring knock activity. 2-3 degrees of knock is about max safe limit.

 

Guys, these numbers are not comperable to what you guys have. Albeit they are close to WHP figures quoted by some of the weaker dynojet dynos there. I think GSC measured their stock IX at 270-280 on a high reading dyno, so it would be comperable to those numbers. Remember, stock IX=279-280HP, so if your dyno measures stock IX's at 250HP, than substract 10%?

I think my friend will achieve 440+HP with the cosies on stock IX turbo (stock car again 280), but he has every bolton imaginable including 9lb wheels, light tires, etc. etc. his car gets tuned daily

From what are different in our cars, I think I could gain considerable power through:

- good manifold like JIC or FullRace
- hks rs intake
- less restrictive catback exhaust
- nice intercooler (like APS? the last 5HP costs lots of money)

so, I am sure with the above, some kick *** tuning, larger injectors I could gain considerable power