215hp 207trq....theres more but somethings going wrong....at 5800rpm it nose dives....tried messing with the timing, still same thing, only difference is the torque got up to 209. We think its either the plugs or exhaust....95% sure its the exhaust because james did another car...same results...got to a certain rpm and just nose dived...did the car with exhaust...didnt do it. But to rule out the plugs hes calling up NGK to see if NGK TR7 plugs will fit (fits 2.2) and we will re-dyno tomorrow. We had the tune at 18* timing with 0 knock at all...did total of 4 pulls...i got videos and pics im uploading now.

 

Ouch, damn thats dissappointing. There must be something going wrong.

 

yea its a nice steady climb in hp and trq but it just nose dives...gimme a few mins and ill have pics up then videos

 

ok cool, so you pulled 18* of timing without meth....Thats crazy, but in a good way...ahaha

 

yup 18* timing 0 knock across the board. Also the a/f ratio is been 11.5 - 11.8

 

it might be your plugs, i had zex plugs in my car and it didn't run right, then i put in the ngk bkr7e's and it worked much better

 

yea i got the plugs from chad and james looked at them and was like "wtf!" no offence chad. But he thinks it could be a possibility but thinks its the exhaust more then likely. Either way im still happy with the way it turned out. ******* pulls fast on the road.

 

really, thats good then. What was the total cost for the tuning. I wanna buy chads 60's but wont be able to get tuned till spring.

 

For HPTuners $200 for the license and $25/hour.....avg of 4 hours. Then if u want to dyno tune $100 for an hour and i think its more if u r also tuning not sure how much more. He gave me a deal today which i cant say what for his wishes.

Some videos if this works...still got 2 more uploading...





Hit the rev limit on this one...didnt know james put it back to 6500


This was the first pull with the rev limit set at 7000rpm. We backed it down to 6500 (stock) Because theres no point in having it up there...my governer is still set at 511kmhr tho :P

 

actually, that could also be heat soaking, because your running a 2.8" pulley with no cooling mods. Throw on a heat exchanger (which chad has forsale) and you should see a little difference

 

no he said its not heat soaking cuz of the timing and no knock and a few other things....only thing heat soaking did was change my hp to lower after each try....1. 215, 2. 213, 3. 211 and 4. 211

 

ahhhh, got cha. Well man, im off to bed. Will check back in tomorrow.

Peace

 

https://www.cobaltss.net/forums/show...o+dyno&page=12
post 202 I think. The 2 bottom graphs are stock exhaust ss/sc's with stage 2
purple one is mine with stage1 and 2.8" pulley, 2.5" over axel w/ magnaflow muffler, air box mod, autolite plugs one range colder. It was 50degrees F. Dynojet.

 

hmm gotta be something going on. I know the dyno im on and the dynojets are going to read different...dynojet reads higher then these ones but in reality its the same power.

 

It looks like he has a dyno jet...hmmm..maybe just a dyno jet program. I think the dyno your on is off. The dyno we used is also used to certify some huge Porshe sanctioned racing deal that they have to be a certain power/weight ratio...guys come from all over the place to use his dyno. The way yours is falling off is way weird. Does it pull stronger towards redline on the street? You know already that the higher they rev, the harder they pull. You might be flaming out those zex plugs. .038" gap on my auto lites.

 

Cant really tell what it does on the road, having gotten to high rpms...since its wet out i dont want to go all out. James thinks thats the problem with the plugs so we will find out tomorrow if the NGK TR7's fit in the 2.0. If they dont ill order new ones.

 

keep us [posted and watch those roads.

 

Yea ill let u guys know what happends tomorrow...got some stuff to do in the morning but late afternoon i should know whats going on. And yea, the roads are why i cant have much fun....did a few short pulls and god damn!...freaked me out a few times

 

never seen someone with that much t iming and no meth. Hopefully everything goes alright

 

^Thats what i said earlierin the post....Kinda wierd

 

I was thinking that same thing guys but everything looks good. I can even add to it if i wanted to, not going to bother until i find out whats up with this nose dive. I gotta do a few things with the army this morning but me and Andrew are heading over to Ravens after lunch. Trying to convince andrew to put his TC on the dyno...lol

 

The nose dive in power after 5500rpm is definatly not the plugs, power would still rise but would have lots of bumps along the way from blowby, I think there is ssome other issues...i can send you a copy of my tune for reference that james might be able to use to compare? I have Hp tuners?

 

you able to send it to email if so fire it off to me, fade_to_black709@hotmail.com And i agree with the plugs. James said thats why he isnt convinced thats causing it but could be a issue. Getting him to price me up Magnaflow Exhaust, Header and downpipe....might get a credit card today and order one

 

Well I figured that I would jump in here since it was me who tuned the car last night and it was on our Dyno here. First off I really don't think the Dyno is off (its the number one thing I hear when someone runs their car and doesn't get what they think they will get.) The reason I say I don't think it is off is because, it's a brand new Dyno, #2 when I ran my car on it with no changes from last year it put down 6 more WHP than last year (457whp). I know of 3 others locally with very large setups who also were within 10whp of their numbers from last year. We even ran one car on this Dyno and then ran the same car the same day on another DynoJet dyno and the numbers where pretty much bang on between the two.

Now lets talk about the car. When we first started fuel was a little rich (not too bad as I bumped up the upper half of the MAF table to be safe on the first pull). When we were done fuel was good staying between 11.4 and 11.8 for the whole pull, even after it nose dived in the graph fuel was good Also the car is not running 18 degrees of timing up top, that is what it was set to from the factory. That much timing did show a little bit of knock up top so I pulled some out. The car now is running about 14.5 degrees uo top and no knock anywhere in the pull with the exception of some burst knock when he first floors it which is completely normal and recovers to 0 immediately. I tried pulling a lot of timing up top (running 11 degrees) but no matter what I did that drop on the graph repeated itself time after time. One of the reasons I think the exhaust is causing the problem. Personally I think that the exhaust just can't flow enough at that RPM with the smaller pulley hence the drastic drop in the graph.

I tuned a 98 Prelude last week that I put a fully built hi compression H22 in and we were getting sort of the same results. The car would make great power up to 7000rpm and then nose dive. The great thing with this setup is that it was in another car last year and we have all the Dyno graphs from last year and the other car it was in. When we overlayed the graph from last year with the new graphs from the new car it was a mirror image right up to 7000rpm (actually we got on average 5-7whp more than last year right up to 7000rpm). Now the only differences in the two setups are the exhaust, the first setup had 2 3/4" exhaust, not cat or res. The new setup has 2 1/4" exhaust, a cat and a res.

The only reason I said it could be the plugs is because they are ZEX, no offense to anyone who runs them but I have not seen many people have very good luck with them. Some swear by them and others say they are junk, who knows. I would like to run an NGK plug in it just to make sure. Also the plugs did look to be in poor condition. Now you would think that you would see a jumpy graph and air/fuel should of went rich if they were not firing but that didn't happen. But who knows, for the sake of a few bucks it would be a good idea to put new plugs in it anyway.

Again IMO it's the exhaust that is causing the issues here. I tried quite a few things in the tune to fix it and no matter what I did it was a mirror image everytime. If it was a timing or fuel issue then the graph should of changed some what with different changes, but there was no change no matter what I did. For the graph to take a dive like that so drastically at the same point every time means that there is something going very wrong. Mostly likely something physical with the setup that is being run. I know that back when I ran the M90 supercharger that the exhaust needed to be first on the list of things to be done to allow the blower to push that much air. Running a 3.4" pulley (stock is 3.8") on an M90 with stock exhaust is not recommended at all because the exhaust can't take it, people have actually blown them up this way. I am thinking we are running into the same situation here.

Well those are my thoughts on the situation. If anyone has any suggestions I am all ears but from what I have seen it's a mechanical problem (ie exhaust). I am going to price up a header and cat back for it today and see if we can't get it breathing a little better.

 

i can email you some HP Tuner files Tonight that I have for my car, its a 2.8" pulley, however I have exhaust and meth. I am not saying its the best tune, but its been running good for me for many months now with zero issues. I do have the rear 02 sensor dtc disabled though. You could at least compare to several other 60lb injector/2.8" combos....may help you sort out the issue?

Let me know if I can help, i you want I could possibly take a look at the tune file you have and see if I can help find any issue...my concern is if he is boosting (115-120KPa) that seems normal for a car with that pulley, a clogged cat would cause a boost increase or spike above the 120Kpa mark.

I do agree that exhaust downpipe seems to be the restriction on these cars, definatly not a bad idea to look into a downpipe/cat back combo

ryanmonahan@hotmail.com is my email address