i dont know, i guess the seals were bad. yea a new 06 mr. i did a boost leak test and i could hear a leak. i at first thought it was the vacumm hose aboue the injectors until i bumped an injector harness and the sound changed. replaced seals= no more leak

 

[QUOTE=nigletsyz] I let the car cool down for about 40min before my last run

[QUOTE]


This is hurting your mph also.
Too long of a cool down will thicken you driveline fluids causing it to drag more.
.

 

i used the xylene because i was attempting to eliminate any issues of timing being pulled due the the slightly higher boost I was running.
I was under the impression that when running race fuel, the AFRs need to be leaned out, otherwise, the car runs richer and simply raising the boost barely offsets the drawbacks of the race fuel. Thats why i was trying for unleaded with xylene added, in addition to slightly raising boost.
Skil, my car did not come with a race map when I was custom tuned. I did the boost leak test the normal way... connecting the tester to the turbo.

My friend told me that I shoot out of the hole ok, but it seems like the car is just dying on the top end. I understand that some cars are weaker than others, but it just seems like the traps should be higher given the mods. Warr, you said that cams will add approx .3 and 3mph.. is this for the 1/8 or 1/4mile?

 

[QUOTE=Nad1370][QUOTE=nigletsyz] I let the car cool down for about 40min before my last run

Wtf? Your kidding me right? Whats next? Cooling down too long causes your oil to thicken too? C'mon man even if that did occur it wouldnt be too much to the point where you are trapping at 5mph below where you are supposed to be.

The fact is cooling down is one of the best things you can do for your car as far as improving et's and traps.

 

oh i forgot to mention that the alignment on the car is way off. It was pulling hard towards the wall. I'm not sure if that would cause losing 4mph or so in the 1/8th though.

 

Ok please go over what you did for the pressure test more throuoghly. Also as far as your alignment, why would your alignment be off? Did you put coil overs on or somehting?

 

The alignment is off because Mitsu did the last alignment. Seriously, it pulls really bad on the freeway.

As far as the pressure test, i made my own. I connected it to the turbo inlet and pressurized the system using compressed air from a tank. I had my wife sit in the car and look at the boost gauge. I listened for leaks while pressurizing the system this way.

 

thats how i did mine, but i had a boost gauge on the tester. found it on ebay for dsm but works awesome for and evo.

 

Well then they need to fix it and why did mitsu do an alignment? You still havent answered that question. Meaning, why would you have an alignment done? What was the necessity to do one? Also I think the way you pressurized it wasnt very effective. If you do a search you will find out a better way to pressure test yor car. Its 100% effective. I would also do a compression test while your at it. Do you knwo how to do one of those?

 

I had the alignment done because the car came out of alignment due to who knows what... hiting potholes, curbs whatever. I've had the alignment done twice on the car, and its in desperate need for a third. I don't understand how the way I did the boost leak test was ineffective. This is how I've always read and understood to do it.

Also the compression test was done a few months back.
165 165 170 160 or something close to that. The cylinders were all within 10psi.

 

Ok 10psi difference isnt too bad. When I did mine they were all within 3 psi. Also just want to make sure, did you do the compression check when the vehicle was warm?

 

No it was cold. I don't think it is going tp make too much of a difference as they were within spec already

 

The pressure test is exactly right - not sure what Skilmatic was referring to...

Fix the alignment, don't use Xylene, and use a race gas mix with 24-25psi.

 

Skilmatic,

I didin't say his 40 min cool down cost 5mph. I stated it was hurting his mph.

I you ever seen shops that dyno cars. They run them first through the gears until all fluids are in normal operating temperatures. Then they do a pull.

I had a shop dynoed my Integra and he never ran it through the gears just letting it idle until temperatures were up and did a pull. My car sat in the shop for 45 min before they got it straped in.
2nd pull was 3-5 hp more than the first across the board. 3rd pull had another 2-3mph.

I agree with your last sentence but I wouldn't run my car if the coolant temps are below 180*F.

Question is how much cool down is allowed until it hurts performance ?
.

 

The proper way to do a compression test is do it when the car is warm.




Well first off you have not a clue what the track layout is. By the time you are ready to do your burnouts you just basically sat for 30minutes getting up to the burn out area so your car is already warm by then. So again doesnt matter how you look at it your car will be very warm by the time you race. And 2-3hp wouldnt cause a 5mph decrease in trap speeds especially at a 1/8mile drag strip. So again your thought was noted but it isnt likely at all.

And btw, a 2-3hp increase probably wasnt due to the drivetrain fluids heating up. It was most likely due to your engine warming up. Not to mention most dynos give out different readings each pulls anyway whethor your car is warm or not.

My friend owns a dyno shop locally with a dynojet. He usually dynos straight up race cars. However, my point is that every car I have seen that got dynoed and I am talking pull after pull after pull each time it gets different hp ratings.

So I am not sure what you are talking about?