Hymee gets Supercharged (Part 2)
04-12-2010, 05:36 PM
#1829
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Wow... fit and finish of the build looks great... especially for a kit that hasn't hit lots of cars yet.
But WOW thats a LOT of volume behind the MAF/TB... Are there any issues with that?
But WOW thats a LOT of volume behind the MAF/TB... Are there any issues with that?
05-20-2010, 04:58 PM
#1835
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I haven't heard from Hymee in weeks, either he's working like a mad man on this project or he as eaten by a rabid Kangaroo! 
05-20-2010, 05:03 PM
#1836
05-20-2010, 10:31 PM
#1839
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He sent out a customer update late today. All dyno tuned and final updated pieces arriving this week. Hymee said for us to expect ~240hp at the wheels with his conservative street tune and 8-10psi. Higher power would require more aggressive dyno tuning and higher boost.
I'm just looking forward to the 60-70% torque boost at low RPM. He said peak rear wheel torque is ~225ft-lbs around 5000rpm with the blower, but it comes on very quickly at low rpm's.
Shouldn't be too much longer....
I'm just looking forward to the 60-70% torque boost at low RPM. He said peak rear wheel torque is ~225ft-lbs around 5000rpm with the blower, but it comes on very quickly at low rpm's.
Shouldn't be too much longer....
05-21-2010, 01:45 PM
#1841
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The torque sounds fun but I would have figured 8-10 psi would give a bit more.
I'm curious to see one of these in action and what can be done when this thing gets pushed.
05-21-2010, 01:55 PM
#1842
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Yeah, 240hp is a bit low considering the amount of money that we have to put on the kit.
If it's all we can get I will probably change my mind and take a closer look at what Pettit is doing, I think they are more close to 280hp.
If it's all we can get I will probably change my mind and take a closer look at what Pettit is doing, I think they are more close to 280hp.
05-21-2010, 02:10 PM
#1843
Did you not read the rest of the e-mail?
He said at 14PSI the engine can put out 340 at the fly
(which is dyno proven).
The other number is Torque. 300 Nm, corrected at the Flywheel J Getting into diesel pulling power now, but with the nice bits of a rotary.
I didn't sign up for this kit to blow by the turbo guys. I signed up because of the quality, finish, and how much of a perfectionist Mark is.
If we have an issue, I guarantee you he won't leave us dead in the water.
Less power, longer our engines will last anyways, right?
05-21-2010, 02:13 PM
#1844
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Does anyone else think that's a bit low? I'm not knocking Mark's work, I'm a big fan of this kit but there's N/A cars that are at 210. (CRH).
The torque sounds fun but I would have figured 8-10 psi would give a bit more.
I'm curious to see one of these in action and what can be done when this thing gets pushed.
The torque sounds fun but I would have figured 8-10 psi would give a bit more.
I'm curious to see one of these in action and what can be done when this thing gets pushed.
pettit have 280-300whp at 8psi with testpipe.
i think boost = boost, at least with an SC.
but that is what i always thought when i see the 340hp dyno from hymee at 14psi! that is something about 290-300WHP on a real car!
why can pettit produce this at 8PSI???
05-21-2010, 02:16 PM
#1845
Yes its a bit low but i think its all about tuning..
pettit have 280-300whp at 8psi with testpipe.
i think boost = boost, at least with an SC.
but that is what i always thought when i see the 340hp dyno from hymee at 14psi! that is something about 290-300WHP on a real car!
why can pettit produce this at 8PSI???
pettit have 280-300whp at 8psi with testpipe.
i think boost = boost, at least with an SC.
but that is what i always thought when i see the 340hp dyno from hymee at 14psi! that is something about 290-300WHP on a real car!
why can pettit produce this at 8PSI???
05-21-2010, 02:18 PM
#1846
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https://www.rx8club.com/showpost.php...postcount=2966
I don't want to clutter up his thread until he responds.
I'm not convinced that this isn't a contributing reason that S/Cs don't have the failure rate turbo's do (our engines)
05-21-2010, 02:29 PM
#1847
Check out my post here on what doesn't make sense...
https://www.rx8club.com/showpost.php...postcount=2966
I don't want to clutter up his thread until he responds.
--
https://www.rx8club.com/showpost.php...postcount=2966
I don't want to clutter up his thread until he responds.
--
Honestly, it's true that there is a higher failure rate with turboed engines. Because they make more power.
I just like the measures Mark has put into ours.. To reduce belt slippage, stop it from creating stress on the shaft, and the heat it puts out...
BTW, discharge temps at blower are getting up around 90+ Degrees C, but ambient on the discharge of the intercooler. If you put your hand on the cold side header tank, it feels just that: Cold Same for the boost pipe coming out of it. A bit of heat soak once it gets to the plenum. Also – that is not on the road, but with a bit of a fan going.
05-21-2010, 02:38 PM
#1848
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What other reasons would there be?
Honestly, it's true that there is a higher failure rate with turboed engines. Because they make more power.
I just like the measures Mark has put into ours.. To reduce belt slippage, stop it from creating stress on the shaft, and the heat it puts out...
Honestly, it's true that there is a higher failure rate with turboed engines. Because they make more power.
I just like the measures Mark has put into ours.. To reduce belt slippage, stop it from creating stress on the shaft, and the heat it puts out...
- #1 installation, either poor installation, bad quality installation, or simply wrong installation (like no heat shield around the turbo, or the boost controller lines swapped)
- #2 tuning, either too risky, too aggressive, or just wrong
If you get past those 2 just fine, then you get to the inevitable:
- #3 more power. More power from the same engine = lower life span. Everyone agrees
Just most turbo failures don't get past the first 2
05-21-2010, 03:44 PM
#1849
you can go ask the pettit guys but they're getting 280-300 at 6-9PSI on the kit pulley and 300-330 on the bigger pulley at 11-13PSI (https://www.rx8club.com/showpost.php...postcount=6333). all to the wheels.