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least common denominator
 
scottmandue's Avatar
 
Join Date: Aug 2001
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I was actually shopping for a RX7 but the 944 was cheaper

Have any of you rotary haters seen the RX8's kicking ass in GT racing?

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Old 05-22-2007, 07:11 AM
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I'm with Bill
 
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Quote:
Originally posted by berettafan
jim do you have any videos of this puppy autocrossing?

i think it's time for Pinks to hit the cones!

FYI - I have laid down the gauntlet if you will on a local car racing forum, I am giving 2 to 1 odds that they cannot beat me in an Autocross and this is with my 911 on street tires. In a month or 2 it will be in the RX7.

The first clip in this vid is a dirving school drill, very short run with some tricky turms.

The second run was the FTD for that event and the 3rd would have been faster but I lost it as you see, I ended up off course but at least I did not loose it completely. I felt it letting go and was ready for the snap, I just drifted it around and back on course.

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Last edited by Jims5543; 05-22-2007 at 09:12 AM..
Old 05-22-2007, 09:08 AM
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I'm with Bill
 
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Oh amd if you look close I am giving a kid a ride in the last run, I ALWAYS give rides to anyone that asks. Its part of the fun for the day freaking out a passanger. FTD's are fun but its more fun to share. Normally, if I give a ride, I set a pretty fast time, then the next run without the weight is blistering fast.
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Old 05-22-2007, 09:14 AM
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I'm with Bill
 
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Quote:
Originally posted by scottmandue
I was actually shopping for a RX7 but the 944 was cheaper

Have any of you rotary haters seen the RX8's kicking ass in GT racing?
This is where you screwed up. Once you Autocross your RX7 you can join Mazdaspeed and get parts for more than 50% off. Mechanics cannot get these prices.

So buying parts for my RX7 is VERY cheap. I have no idea if 944 parts are affordable but its hard to be 50% off.
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Old 05-22-2007, 09:16 AM
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Jim, was there a bus with air brakes behind you in that first video?

What is that sound, the gearbox or the exhaust?
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Old 05-22-2007, 09:29 AM
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least common denominator
 
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Jim, there is a RX7 convertable in my area for sale... not sure what year... are thye any good?
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Old 05-22-2007, 09:55 AM
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Quote:
Originally posted by scottmandue
Jim, there is a RX7 convertable in my area for sale... not sure what year... are thye any good?
What do you want to do with it? Cruiser? Autocross? Track?

Vert is a good cruiser, any non turbo RX7 is a good reliable car but not very fast, my brother had a non turbo RX7 and it was setup for Autocross and it handled really good. Made me think my car was screwed up suspension wise, the turn in on his car was uncanny and made my car look like an understeering pig.

Turbo RX7's = big power but just like 930's when you tune them up they will cost money.


The big question is what do you want it for?

I would look for a 1986-88 Non turbo for a cheap Autocross track car.

Or a 1989-1991 Turbo if you want more power, its a little heavier but it has a better engine/turbo setup stock.

The beauty of the Turbo is that if you simply bolt on an exhaust you'll pick up an easy 60HP wich = about 250HP.

Do a few more upgrades like bigger injectors, SAFC and boost controller and you'll see an easy 250 to the wheels.
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Old 05-22-2007, 12:59 PM
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Quote:
Originally posted by kach22i
Jim, was there a bus with air brakes behind you in that first video?

What is that sound, the gearbox or the exhaust?
Your messing with me aren't you?

The loud air sound is the blow off valve between the intercooler and intake. When I take my foot off the gas or lift a little it allows the boost to escape and let the tubo maintain its full RPM's thereby the Turbo is ready to hit full boost again when I get back on the gas the the blow off vavle closes giving me full power instantly. (takes big breath)
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Old 05-22-2007, 01:04 PM
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Quote:
Originally posted by Jim Cesiro
Your messing with me aren't you?

The loud air sound is the blow off valve between the intercooler and intake. When I take my foot off the gas or lift a little it allows the boost to escape and let the tubo maintain its full RPM's thereby the Turbo is ready to hit full boost again when I get back on the gas the the blow off vavle closes giving me full power instantly. (takes big breath)
My comment was tongue-n-cheek, but I did not know what the sound was.

Thank you for the quick turbo lesson, I just learned something.
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Old 05-23-2007, 03:07 AM
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Quote:
Originally posted by kach22i
My comment was tongue-n-cheek, but I did not know what the sound was.

Thank you for the quick turbo lesson, I just learned something.
I wasn't sure if you were joking or not. I thought everyone knew what a blow off valve was these days with all the tuner imports on the road.

Yes, its a loud and annoying sound but when I am Autocrossing (and on track days) it is necessary.

Once I let my foot off the throttle the the butterflies on my throttle body close it creates a blockage in the flow from the turbo to the engine. This will cause backpressure on the turbo and it will slow down a lot trying to fight the backflow. By releasing the pressure (blow off valve) it lets the turbo spin free until I open the throttle again. Then the BOV will close and the turbo is already spinning at close to full RPM's and ready to give me full boost in a fraction of a second.

So I will gladly take the noise with the performance gain.

Also in the 1st clip the cam corder was mounted on the front hood right next to the BOV on a sticky pod.
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Old 05-23-2007, 03:37 AM
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Quote:
Originally posted by Jim Cesiro
I wasn't sure if you were joking or not. I thought everyone knew what a blow off valve was these days with all the tuner imports on the road.
I'm in the Detroit area, land of the big V8, what are these "tuners" you speak of?

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Old 05-23-2007, 04:04 AM
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Jim... do you build your own engines or do you have a preferred builder? And what engine are you using... the 13b?
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Old 05-23-2007, 04:30 AM
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Quote:
Originally posted by scottmandue

Have any of you rotary haters seen the RX8's kicking ass in GT racing?
I have read about how the RX8 has been winning almost every category it enters. One of the big car magazines - R&T or C&D, had a comparo test with all the new GT cars and the five-year-old RX8. The RX8 won.

After all, in some circles the RX8 is called the "four-door 911."
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Old 05-23-2007, 08:26 AM
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Information Junky
 
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Quite simply, the rotary engines do a poor job of capturing the bang (of fuel an air). Many people latch on to the 'air pump' simplities that the rotary has, and don't consider capturing the work of the fuel.

THe weight savings of the simple small engine are generally offset by the extra weight of extra fuel. Unless you are using it for short sprints (autocross) ... tho' at that point, why not just go electric?
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Old 05-23-2007, 08:36 AM
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Quote:
Originally posted by cashflyer
Jim... do you build your own engines or do you have a preferred builder? And what engine are you using... the 13b?
I use a local guy, he is from North Carolina and a total hillbilly. He is also a master at fabricating anything.

I am running a 13B-REW out of a 3rd Gen RX7. I took the twins off and put on a HKS T04B single. I use a Motec M4 to control it all.


I needed more fuel. Do these lines look big enough?



I had him make a custom ported throttle body. Its 30% bigger than stock.


Here is the hillbilly looking at my fried engine. I overheated it to 280 degrees at a DE. I then drove it for a week before I decided to take it off the road and pull it apart. It would still turn sideways in second gear if you floored it. It had 1/2 the compression it was supposed to have.

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Old 05-23-2007, 10:20 AM
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My wife is loving this SA22. It's spec'd for SCCA IT7 club racing. The engine is a bone stock 12a, but the suspension is tight.

After watching how well she took to the track, I figure she'll be looking for more power for next year. I'm just planning ahead for now.

What do you think would be a good upgrade? A tweaked 13b?
I've been told it's a simple drop-in solution, and I don't want to get stupid on $$. If we're looking at more than a few grand, I'll just upgrade her to a 911.



edit: Your lines are big enough, but what's pushing your fuel? I hope you upgraded to a bigger pump!
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Last edited by cashflyer; 05-23-2007 at 12:27 PM..
Old 05-23-2007, 12:20 PM
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least common denominator
 
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Quote:
Originally posted by Jim Cesiro
This is where you screwed up. Once you Autocross your RX7 you can join Mazdaspeed and get parts for more than 50% off. Mechanics cannot get these prices.

So buying parts for my RX7 is VERY cheap. I have no idea if 944 parts are affordable but its hard to be 50% off.
Very true but at the time I wasn't aware of the Mazdaspeed deal and my buy in budget was $4K. The RX7's I looked at for $4K didn't look very nice. Plus I was looking for a fun weekend cruiser that would be sporty in stock configuration... I don't have the time or money to spend wrenching on a second car.
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2019 Kia Stinger 2.0t gone
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Old 05-23-2007, 12:37 PM
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Quote:
Originally posted by cashflyer
My wife is loving this SA22. It's spec'd for SCCA IT7 club racing. The engine is a bone stock 12a, but the suspension is tight.

After watching how well she took to the track, I figure she'll be looking for more power for next year. I'm just planning ahead for now.

What do you think would be a good upgrade? A tweaked 13b?
I've been told it's a simple drop-in solution, and I don't want to get stupid on $$. If we're looking at more than a few grand, I'll just upgrade her to a 911.


edit: Your lines are big enough, but what's pushing your fuel? I hope you upgraded to a bigger pump!
Have you considered doing a port job on your wifes car?

An aggressive street port will make a lot more power. If you want, and your willing give my mechanic a call I would love for you to use him even though he is far away, he is really good with FB's more than any other generation.

He has a ITA racecar as well that has won a few races as well. He knows how to get the most power out of them bith legally and when "being innovative"
I'll PM his contact info to you. A good port job with a few other tweeks will get you another 50-60 HP in that car. Throw in a light weight flywheel and you'll have a nice little screamer. Has it been lightened as much as possible?

The fuel for my car? Enough to support 700RWHP!

Here is the fuel pump, its a monster.




Then we upgraded the fuel rails to move the fuel. I cannot wait to dyno this car. I am afraid I do not have enough Turbo anymore. I have a GT35R (ball bearing turbo that is about 30% larger than my current one) sitting in a box just need a manifold.


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Old 05-23-2007, 04:19 PM
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The car all the parts I am showing is in. Total sleeper. No one expects it to be so fast. I love it.

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Old 05-23-2007, 04:29 PM
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Being a '79, her car is still sportin a carb.
Lightened? Well, short of going with glass body panels, yeah.
I'm not looking to bump up her power just yet. Let her finish out the season and build up her skilz first. But I would certainly look into giving your guy a call when it's time.

Nice.... Aeromotive pump. I like their stuff.

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Old 05-23-2007, 05:02 PM
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