I know my 5th and 6th port actuators are frozen.
Would that help me at least bring me past 120, when I get those fixed

 

Aaron, in the movie i posted you can see the tach and you can see the road also... so You've got your proof...

RX7_Edgar with the 5th and 6th ports fixed you will feel the difference

 

If your aux port actuators are frozen shut that means you are running on 4 ports instead of 6, this will cause a HUGE power loss.

Edit: ZeroStage: WOW, you definitely proved me wrong. What kind of compression does that engine put out? Any porting? Engine mods?

In my car I would top out 4th gear and as soon as I'd put it in 5th it would immediately start losing speed..

 

Only proof I would consider is GPS based.

 

I don't have a clue about the compression of the engine.... At the time i made this movie the only mod the car had the exahust that didn't have any converters... all the rest was stock...

By the way, when i change from 4th to 5th the car dies a lot but it doesn't loose speed.

 

It depends on the position they're stuck.

And that video doesn't appear to show your RPM over 5800, so that $100 bet might still stand being that it'd be under it.



So you did the single most effective power increase modification for an N/A short of cracking the block and wonder why its faster than stock?

 

i've been 110, not really wanting to push it cause my car needs work

and sonicrat, i just watched goonies lmao

 

i never saw past 100 on my old N/A ...engine temps started to climb

 

The fc looks pretty damn aerodynamic, didn't mazda spend tons of time making the body aero dynamic (I saw something on this long ago i think)

My automatic fc hits 100 easy I haven't tried to top out after I replaced the stock exhaust and did some maint work on it but I was able to hit about 123 or so, in a automatic. So if you can't hit more then that with a manual, your cars got some issues

edit to the guy postin video topin out, thats dumb video taping while going so fast whenever I push past 100, I keep both hands on wheel -_-

 

I was cruising along on the Autbahn when I noticed I was doing 210-220 KPH, so I decided to give it some more and got to 240 KPH (150 MPH) fairly easy. I slowed down and set cruise control to 210 KPH. I was already driving for 9 hours, with a 2 hour break, so my right foot was getting numb.

Riz.

 

My both ands were on the wheel... The cell phone was between my hand and the wheel... Wich is why I dindn't change any gears...


??? I dindn't really understand that.. I said he bet 100 that my car doesn't reach 150.. Well... It reaches 150 as you can see in the video... What has that to do with the rpm??

Well... The exahust might be the single most effective power increase modification but my exahust isn't that good tho...

 

Your RPM never seems to exceed ~5800 which with the tires you specified, would put you under the 150mph mark.

The stock exhaust minus the original cats will net you a good 15 or more pretty easily.

 

Well... I really don't care... The car marks 240kmh / 150mph... I only tried it about 3 times and it reaches that value... If it has a big error... I really don't know... If I have time I'll compare it with a GPS but sinse I don't have one I'll need to ask some friend one...

About the exahust... Are you serious?? 15hp only by removing the cats?? I'm asking this because when i bought the car, the exahust was alreaddy like this so i don't know how it would run with the stock exahust...

Sorry for the off topic but if removing the cats give you about 15 how much do you gain with a full RB dual system?

 

RB isnt the best exhaust

When I got a new exhaust the car felt new, even the k&n drop in filter made butt dyno difference, you only can gain so much

 

yeah for me 135 i've hit with my vert, 140 and it took me some time to hit, it was a slow climb to that speed.

 

^but i wouldnt try that again, just plain dangerous.

 

A finer 'tuned' exhaust varies a bit on your other mods (such as intake/header, etc). I've seen 25-30whp differences between bone stock and just a corksport single with no cats & drop in k&n. I've always seen less power with the RB headers on stock blocks though. The FC speedo's are god awful, as are the tachs though. My GTUs would commonly say it was burrying the needle past the 160 mark, GPS/radar/RPM put me a good 25 under that though, that's why none of these threads really do much good going off the stock equipment with how bad they vary.

 

Wow!

I finally got my FC to go past 120 today!
I just remembered that I was super low on oil because of my Rear main seal that needs to get replaced.

So I ended up adding 4 quarts of 20W50 oil and took the FC down a long 5-7mile road and she went past 120 in 4th gear and it still kept climbing.

I just finished buying the rear main seal for $12 from Mazda and will get it replaced Tomorrow. I guess if I'm going to have to drop the transmission, I might as well replace the Clutch with an OEM Mazda Clutch kit.

Was trying to look for a Exedy but they were all $300 and above.

It just kept making me think and think the whole why the FC wouldnt go past 120! after doing every single routine maintenance on that FC!! Now I am happy that I finally found that the oil was really really low.

 

ON my 87 T2 when it had 52k on it. Bone stock. I hit 145 on the spedo, it had more in it, but i got scared I used to hit 120 coming home from tacobell at 3am. It was a 3/4 mile strait shot. I still don't quite know why i used to do that.

 

Just to clear things up, i believe an s5 FC with the aero package has a drag coefficient of .29. So to whoever said the FC needs serious modification and or body improvements for aerodynamics, you are mistaken.

 

ive taken mine past 150 before on the highway.


the speed reading was from a gps so dont go crazy.

t2 with some mods. heh.

 

if you have an NA that goes to 150 mph then your clutch is slipping.

 

120 was the most I got my FCs up to when stock. I had an 86 and an 87

 

The S4 Sport had the best coefficient of them all.

 

umm what? I hope you were just being dumb about that comment.