I ran a 14.3 last night on a long straight that has a slight elevation change (going upward). You can barely see the angle but it has some. My prediction is close to 14.1 or 14 flat in a flat surface. The car feels pretty good. I am running the full body kit, which is not the best for aerodynamics and make the car heavier too. I had a full tank of fuel too. So i think my car weighs around 3450 with me on it.

I dont think it is too bad. Before the turbo my best time was 15.2 in the same place. Very consistent times . A full second faster before even tuning it.

Before Greddy at 0 PSI (LOL): 15.3, 15.3, 15.2, 15.4
After Greddy at 5 PSI: 14.6, 14.7, 14.6
After Greddy at 6 PSI:14.6 (missed shift), 14.4, 14.3

In the first pic is the comparison between the car stock and the car with Greddy at 6PSI.

In the second pic is the comparison with the car at 5psi (last week) against last night at 6PSI. Almost 3 tenths difference in 1/4 mile.

In the third pic is a comparison of HP between the 3 runs (Greddy 6psi, 5psi and stock)

The fourth pic is a comparison of speed between the 3 runs (Greddy 6psi, 5psi and stock)

My next mod will be a high flow cat since I am running stock. Hope to gain some more power from it. I have not tuned the car yet. I am running the original map. Adrian improved around 25-30 HP from the stock map to a tuned map. I think this car can easily run in the 13's.
Hope you guys find this post helpful. I have heard that the Gtech is not very reliable but I have had runs almost identicals, very little variation. I trust it a bit.

Beers!!! I am happy :D

 

lschiavo,
how are you launching???? i am getting pretty constant 14.9s with just a green air filter. put the revi in on thur, but have not done any 1/4 miles yet.

glad to here your problems are getting better. i am featering the clutch at about 6.5k with dsc and tc off. have not tried to drop tire pressure from 35 yet.

are you happy with the srfly wheel????

beers
john stewart

 

I guess you're still stock (no turbo) right????
I am launching it at 5 K. It makes sense that my best before GReddy was 15.2 and yours 14.9...
Remember I have few more lbs than you with the aerokit and the drag is a little higher.

Flywheel is worth the money, don't even think about getting the pullies - Total bullshit and waste of money

 

thanks for the info,
the flywheel is going to be next. i would think the areo kit to be lighter, but areo drag to be there.

try the clutch procedure i am using i got about .75 sec out of it. i was dropping from 5k before.

i am going to see how this whole turbo / sc thing works out.

wow i just gave advice to a mazda champ, was this the star series????. btw i paid my way through college street racing back in the day that it was almost safe.

beers

 

LOL. Yes I was doing the Pro Star Mazda last year and did 4 races this year. I was called to do a Champ Car test in May and did quite well, now I left the Mazda series to be a Test driver for a Champ Car team.

I will try launching it at 6.5-7K. It should be faster. I predict you would be in the high 13's with the GReddy turbo. It is very cool, I love it.

 

love the star mazda thank god for speedvision. the feathering is the secret it think it keeps the wheel hop away.

probably not real good for a stock clutch, but i am all about moderation.

not ready to take the jump on turbo yet. would love to ride in one, but i am an early adopter in my other hobbies. and early adopter in this one is a big chunk of loot with unknow relablity issuse down the road.

i would like to thank you for being a guinni pig, i mean that in a good way.

beers

 

Luis,

Be very careful with the hi-flow cat unit. SOME/MANY of us had bad backfire problems, that we could not get rid of even with tuning the hell out of the engine. Might be buying a $300-$400 unit only to be selling it later on. Tune it first. Should be able to lean it out quite a bit (gains nice hp).

 

thanks fanman, my car is backfiring with the stock cat. LOL
i though it would be better to have a high flow with the turbo..
Thanks for the advice...

 

Unfortunately the backfire problems that come with the hi-flow cat were not like the "regular" RX8 backfires (on de-accel.), they would be random. I would be driving on the freeway at a constant 70 mph and it would pop, or it would pop like 5-6 times while driving normally for 2 blocks. We tuned it & it got like 20%-30% better. It is my daily driver so it still annoyed me to the point where I just pulled it. with the stock cat it is about 85% better. Better off getting the tuning, maybe start sving up for the injectors & boost controller.

Good times by the way. As long as you can see a consistent improvement. .8-1.0 sec. improvement is not bad at all. Like you said with tuning & later maybe upping the boost you should be into the 13's easily.

 

Thanks Fanman, I alreaady have the boost controller installed. What is the size of the stock injectors? What should i upgrade them to when i plan to go 10 psi??
600? 700? . Is 13's good for this car with turbo?

Thanks

 

By the way, i dont understand how people can be running mid 14's stock without turbo...

 

I have an official drag strip printout for a 14.7 N/A, no piggyback, stock cat, and Hymee exhaust.

Cheers,
Hymee.

 

14.3 with Greddy kit... kinda disappointing...

 

Polak ran 14.3 stock.

 

Agreed, but there are other factors like temperature and elevation. But it is a little disappointing, especially on a gtech.

 

Stock fuel injectors are primary 2's & secondaries are 380cc's. They have injectors that go 440cc's & 550 cc's. If you aren't going to go crazy take a look at these sizes.

As for 13's being impressive, it all depends on what track you are at & what conditions you are in. But if you were doing low 15's & now you are in low 14's, then hopefully with higher boost/CFM level you get to say high 13's. I would say a 1 1/2 second improvement (& probably about 10-12 mph improvement) is pretty good. We have a track out here closest to me (Palmdale) that I would pay somebody $500 if they could break 15's with a stock RX8. It is like ,3000 ft. above sea level, hot as hell, & has bad traction. Best I could ever do there in my 911 was 13.9-14 flat. All depends on several factors. If you did 15's there before, dropping it to mid-high 13's would probably put you in some good company.

 

I suppose my 15.53 runs aren't bad with two people and a bad shift.

 

I ran a 14.9 in hot weather bone stock GT in memphis, TN, I was hoping to see better times, but like you said it was elevated. Still better than stock regardless, I bet it feels a whole lot faster, which is more important anyway.

take care

 

Yep here in calgary it is like 3500 above sea..
Too high and dry like hell! I cant breath when I run...
I was not in a dragstrip where u have the rubber laid down at the beggining. I was in a street with a slight slope upward. I guess in sea level at a real dragstrip I could run in the 13's..

To have an idea u have to compare before and after, not the actual time. i improved about 1 full second. Same street, same temp, same elevation, etc..

 

good for you.

and you dropped the clutch how????

slow is smooth, smooth is fast. slow in fast out. blah, blah.

beers

 

Feathering at 5.5K