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2010 Turbo Build: a.k.a. "Project JETS3T 8"

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Old 01-02-2011, 04:29 PM
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Originally Posted by bse50
That's a big intake porting. Too big actually.

The risk of losing a seal in there is high and huge intake ports coupled with a turbo don't really like tiny exhaust ports.
I'm sure your car will produce a nice amount of power but i don't know what kind of curve you'll see.
It's still an amazing build though!
do any high HP rotary's have a nice power curve?
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Old 01-02-2011, 04:33 PM
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lots of big things going on in this build, cant wait til you give a ride...

your gonna give me a ride right?
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Old 01-02-2011, 04:45 PM
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Originally Posted by gregs
lots of big things going on in this build, cant wait til you give a ride...

your gonna give me a ride right?
You got it!
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Old 01-02-2011, 05:59 PM
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Originally Posted by rg1977
Thx!
C'mon BSE, too big? nahhh. It's perfect for some nice top-end results.
None of the seals, or especially seal tips/edges come close enough to the port for me to be worried about. And yes, you're right, the exhaust port size is my main concern/issue. If this setup doesn't net me good results, I'll be going with a setup like Mazdatrix with the peripheral rotor housing + side port side housings and custom manifold...
If top end is your goal i think you'll have a big smile. I'm more of a balanced build guy, driving 500hp out of a 1.3l engine around a track would be impractical
I didn't express myself well enough I think: my concern with the huge ports is that of side seal wear\corner seal troubles etc. Big empty spaces aren't the best.
Again then, with the goals you're setting i'm sure that you would be disappointed if your engine lasted more than 20.000miles, lol!

Originally Posted by rotarenvy
do any high HP rotary's have a nice power curve?
Nope, that' why many rotary racecar tuners\builders prefer to sacrifice overall power figures to keep the cars driveable, even on 13b rew units!
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Old 01-02-2011, 06:52 PM
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Good god this build just keeps getting better and better.

I'm going to want a ride as well. lol
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Old 01-02-2011, 07:28 PM
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This build is the like the "E" ticket ride!
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Old 01-02-2011, 07:58 PM
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Originally Posted by rotarenvy
do any high HP rotary's have a nice power curve?
whats high?
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Old 01-02-2011, 08:56 PM
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over 500hp? I'm going by the dyno chart on my local rotary shops wall at about 650hp from memory. looks like mount Everest and only goes to 5000-6ksomthing rpm from memory.
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Old 01-02-2011, 09:07 PM
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Originally Posted by bse50
If top end is your goal i think you'll have a big smile. I'm more of a balanced build guy, driving 500hp out of a 1.3l engine around a track would be impractical
I didn't express myself well enough I think: my concern with the huge ports is that of side seal wear\corner seal troubles etc. Big empty spaces aren't the best.
Again then, with the goals you're setting i'm sure that you would be disappointed if your engine lasted more than 20.000miles, lol!
Ahhhh, yep, you're right, the bigger the hole the bigger the potential problems with parts sliding over the hole...thx 4 clarifying that.
Hahaha, 20.000miles???...I hope that is a typo.

Originally Posted by bse50
Nope, that' why many rotary racecar tuners\builders prefer to sacrifice overall power figures to keep the cars driveable, even on 13b rew units!
You're right except for drag car applications...oh, and land speed applications too...like mine.
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Old 01-02-2011, 09:10 PM
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Originally Posted by NgoRX8
Good god this build just keeps getting better and better.

I'm going to want a ride as well. lol
Give you a ride? Shoot, I'll let you drive it if you sell me your uim for a reasonable price...
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Old 01-03-2011, 09:30 AM
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^^^ Snowballs chance in Hell.
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Old 01-03-2011, 11:53 AM
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interesting stuff . Did you do anything with the centre exhaust port sleeve ?
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Old 01-03-2011, 12:11 PM
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Originally Posted by Brettus
interesting stuff . Did you do anything with the centre exhaust port sleeve ?
Untouched. I'm taking a slightly different route with my setup, no C16, the motor will be tuned for high boost on straight methanol.
Low boost street driving will be pump gas with the AIS dual nozzle water-meth injection.
So I "shouldn't" have any problems with that sucker melting.
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Old 01-03-2011, 02:23 PM
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Nice build!!!!
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Old 01-03-2011, 02:28 PM
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Originally Posted by rg1977
Untouched. I'm taking a slightly different route with my setup, no C16, the motor will be tuned for high boost on straight methanol.
Low boost street driving will be pump gas with the AIS dual nozzle water-meth injection.
So I "shouldn't" have any problems with that sucker melting.
I managed to melt mine , and as a result noticed some very positive gains on the dyno !
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Old 01-03-2011, 03:11 PM
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really?
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Old 01-03-2011, 03:27 PM
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Yes

Check out the comparison between boost @ whp past 7000rpm on the two higher dynos .
Only difference : melted divider on centre port ......

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/horsepower-vs-boost-pressure-comparison-greddy-based-turbos-201475/
Last edited by Brettus; 01-03-2011 at 03:31 PM.
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Old 01-03-2011, 03:46 PM
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this is an epic build, can't WAIT to see it in person at the SoCal Dyno Meet.
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Old 01-03-2011, 04:34 PM
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Originally Posted by Brettus
Yes

Check out the comparison between boost @ whp past 7000rpm on the two higher dynos .
Only difference : melted divider on centre port ......

https://www.rx8club.com/showthread.php?t=201475

How long did the motor last after that
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Old 01-03-2011, 04:39 PM
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Originally Posted by Brettus
Yes

Check out the comparison between boost @ whp past 7000rpm on the two higher dynos .
Only difference : melted divider on centre port ......

https://www.rx8club.com/showthread.php?t=201475
Where did the divider end up? Was it just lodged in the exhaust manifold center pipe?
My first guess is that it would have blocked the exhaust flow entirely coming out of the center port. Very very interesting.
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Old 01-03-2011, 04:40 PM
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Originally Posted by FazdaRX_8
Nice build!!!!
Thx!
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Old 01-03-2011, 04:42 PM
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Originally Posted by Jedi54
this is an epic build, can't WAIT to see it in person at the SoCal Dyno Meet.
Thx for fittin' me in a standby slot Jedi!!!
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Old 01-03-2011, 05:25 PM
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Originally Posted by dannobre
How long did the motor last after that
That is not the point - the loss of the divider was not a factor when it blew. There was no sign of any damage from crossover .
Last edited by Brettus; 01-03-2011 at 05:29 PM.
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Old 01-03-2011, 05:28 PM
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Originally Posted by rg1977
Where did the divider end up? Was it just lodged in the exhaust manifold center pipe?
My first guess is that it would have blocked the exhaust flow entirely coming out of the center port. Very very interesting.
It was rattling around inside the sleeve. The divider further up the sleeve was still in tact and prevented it from escaping .
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Old 01-03-2011, 06:19 PM
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Originally Posted by Brettus
It was rattling around inside the sleeve. The divider further up the sleeve was still in tact and prevented it from escaping .
Dang, I've got an idea...completely remove the bulky center insert and weld maybe a 1/4" thick divider to the actual exhaust manifold so that it protrudes outward and into the center port, effectively acting as a divider, but a much leaner one. I think I might just try that, need to talk to Elliot about this.
Thx Brettus for bringing the center exhaust sleeve issue to light!
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