https://www.nopistons.com/forums/pub...1047683561.gif I've got an 89 gtus with an HKS supermega flow intake and a header of some sort (it was on the car when i bought it) and a HKS sport class cat back exhaust. The motor was just rebuilt and i put about 1500-2000 miles on the motor and i recently took my car the strip and the best run my car gave was a 17.110! https://www.nopistons.com/forums/pub...O_DIR#>/11.gif what kinds of times should i be running.

I think i got some serious motor problems



if i have a header is the air pump needed

When i got my the motor rebuilt he took it off and the car ran like **** above 4500 RPM. He said the models before mine did not need them but he just found out the 89 and newer cars need them. Does he know what hws talking about.

My car also had an extremely rough idle the day i raced it.

I drove the car over an 1 at 80 miles an hour to the strip

so my motor was hot could this have been a cause of slow E.T.'s

personally I wouldnt bother racing the car, you would be lucky to get in the 15's with it so why break it?



now if its a spare car that you dont care about go for it, but why bother

if its your daily driver?

i ran 15.9 with my old GTU....



you should be in the 15's

I don't think there is a point in drag racing non ported NA's unless tuning or something but I ran 16.0 with cone filter and exhaust on one. I ran 15.7 with header, filter, exhaust, efan, aluminum hood, and manual steering on the other. They don't really like drag strips. You should definitely be in the 15's though with your 4.30 rear. What are your 60 foot times and what was your MPH through the traps? And yeah, you should have the air pump to activate your auxillary ports. Maybe that is why you are in the 17's.

Maybe your 6ports aren't opening. On the 89-92 NA's the airpump opens them. That would cause a loss of power above 4500 rpm. I don't know if it would be super bad though.

On the 89-91 models, the airpump opens the auxillary ports, as already mentioned. This will result in a HUGE power loss (some have shown upwards of ~25HP loss from non-working ports). Also, if you still have cat(s) you also need the pump to prevent them from getting burnt up and clogging.

Edit - I missed the part about possibly not having an airpump, so that's the most likely cause of the 17s.



But, everyone is always so quick to blame the car. Don't people stop to think it could be the driver?

you don't want to say YOU SUCK AND I AM GOOD THAT IS THE PROBLEM! https://www.nopistons.com/forums/pub...>/rolleyes.gif

If you're referring to me, that's far from it. I drag raced once and sucked big time. But I started focusing on what I thought I was doing wrong, not what was "wrong" with the car. I'll be the first to admit I suck at drag racing and I've still got some more learning before I'm competitive at autocross.



I was merely making an observation. In this case however, without an air pump, it IS the car.

i ran a 15.7 with a sport model all that i had done was an apexi n1 and my air pump was disconnected....it also seems that people that have headers and stuff run slower why is that?

i'm above average drag racer. i'm horrible at drifting although all you need is practice to be good at anything https://www.nopistons.com/forums/pub...IR#>/smile.png

So a 4 foot tall midget could play D against Shaq if he went to the court every day and practice, practice, practiced?



https://www.nopistons.com/forums/pub...#>/biggrin.png

no but he could become the worlds greatest 3 point shooter and own shaq then https://www.nopistons.com/forums/pub...R#>/tongue.png

no but he could become the worlds greatest 3 point shooter and own shaq then https://www.nopistons.com/forums/pub...R#>/tongue.png [/quote]

or the best free throw shooter and dominate.



kevin.

what the **** are you people talking about?

check the 6ths ports.. see if they work, if not then i gues that is your problem...

and give us some info on what your launching at and shifting at extra...

first i shifted at about 7500 to 7800 and i think my 330 ft time was 2.4 all three runs were in the low 2's or something my reaction time was a .8 and i ran a 17.1 at 80

second my reaction time was a -.2 and i ran a 17.2 at 80. something mph again shifting normal

third i had .185 reaction time and shifted at 8000 plus and ran a 17.3 at like 79 mph

it might have been the 60 ft times that were in the low 2's

unless you're missing shifts or racing in Colorado, there must be something wrong with your car

i didn't miss a single shift but my clutch doesn't release all the time if quick shift into 2nd it takes a while to get in like one time i was shifting into 3 i punched it and it just reved to like 6000 and stayed there and wouldn't fully release it's a brand new clutch!

Reaction time doesn't mean anything, what are your exact 60 foots.

you have a clutch hydraulics PROBLEM!

Yeah, I think you might wanna get that fixed before you go back to the strip.

My car tends to back fire alot it not really loud unless i rev the **** out of it.

I'm sure that some of problem is bad driving but i don't think i'm that bad a 17 really licks balls

Is the car still stock. TO lazy to reread the thread.



Like stock cats?

Let us not forget that stock FC NAs officially run mid sixteens, no matter if it is a base S4 or GTUs. Add a sick clutch and disabled sixth ports, and a 17+ time is not unreasonable, despite some exhaust mods.

^ What he said.

When i went to the strip i ran 16.3 this was my best. My car is 90 gtu bone stock at the time i had around 20k on the motor. What are you droppin it at ?

79 and 80 mph trap speeds!?... its your clutch, 6-ports arent working and check your VDI... if anyhting zip tie your sleeves and vdi open and see if that helps your top end power...



also check your timing

I fairly new to rotary engines, but do rx7 run a little rich than a pistons engine? my car seems to run rich i just got the car and have nit picking at it trying to get it up to par. When i launched at the track i tried three different techniques for launching and i got to run three times. The first i launched at around 3 to 4 thounsand and i did a 17.1 second i timed the light and did a burn out that caught the light perfectly and did a 17.2. The last run i tried to warm up my tires with a burn out and tried the same method as before and i ran a 17.3 i thought stock e.t.'s on a gtus was about 15.8 i realize this is a professional driver but is this information true

Is timimg adjusting or checking the timimg something a regular mechanic could work on or should i take it to a rotary specialist

I have and intake a header and a cat back not to sure on the converter the car has about 140,000 miles but only about 2000-2500 on the rebuilt motor

Dude, you cant be this bad of a driver.. what was your MPH in the 1/4 this time? I'm telling you, if it's still 79 or low 80's, something is not right with that car.



Yes, they tend to run a little rich. Yes, you can easily do the timing yourself with a light.