jmac's He341aka hy35w @20 psi 404 whp and 382 torque.

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jmac636
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jmac's He341aka hy35w @20 psi 404 whp and 382 torque.

Post by jmac636 »

I took my car back to the dyno for new sheets today. It made 404whp and 382 torque @ 20 psi on 93 octane. I tried fixing a boost leak under my intake but made it worse. My iaac valve is leaking down pretty fast. AFRs were between 10.0 and 10.8. But I am happy with my numbers. It holds 20psi all the way to redline. I had the guy rev till 7000 rpm's then 7200 rpm's. I leaned it out a little on the second run but still ran a 10.8 afr. The He341has a 56mm comp wheel and 58mm turbine wheel and a 9 cm2 (.65 A/R) housing.

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Last edited by jmac636 on Sun Nov 13, 2011 9:57 am, edited 1 time in total.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
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Post by Kfred »

Thats a pretty nice powerband. Good numbers for 20psi.

You still running the stock s14 cams?
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Post by jmac636 »

Thanks Kfred. Pretty good for $250 turbo. Today I am going to fix the boost leak. I definitely made it worse by trying to find the source of the leak. Kind of mad at myself for messing with it right before I was suppose go dyno the car. Probably wouldn't have made that big of a difference just spools a little later.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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Post by Kfred »

Kfred wrote: You still running the stock s14 cams?
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Post by jmac636 »

No, I have bc 264's shimmed correctly but not degreed. It's on my list of things to buy in the future for my car but I've got an Ls project I'm working on now so time and funds are occupied at the moment. Besides I'm not really going for any records my ka-t setup since it's my daily driver.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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Post by jmac636 »

Here's a video showing my afrs and boost gauges during my second pull.

http://youtu.be/4nXy4Q10KoU
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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Post by ATLspeed »

Niiiice

To answer your PM from zilvia, I haven't made it to a dyno yet. I'm going to attend a dyno day on Dec 3 so I can see where I'm TRUELY at. I just figured 400hp due to most people running these turbos are touching 400+ @20psi
- KA24DE = 14.8
- KA24DE-T25 (7psi) = 13.1
- KA24DE-T28 (12psi) = 12.9 (traction issues)
- KA24DE-T HE351 (20psi) = ??.??
- 2JZ HX40 (18psi) = LOL

~Set Up~
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Post by jmac636 »

Well I fixed the boost leak and had to redo my Fuel map to accomadate the leaning out. I found a bad o-ring on the Iaac valve. On the street with 93 I like to be around 11-11.5 afrs. I would rather be on the safe side of things. There definitely is a difference on the dyno afrs versus on the street afrs. On the dyno my AEM read 10's but on the street my gauge was reading slightly leaner at 11.2. After i fixed the o-ring I saw afrs at 12.2 which I proceeded to fix right away.

I would like to throw my he351 back on and dyno it at 20psi just to see the difference.

he341- compressor 56mm-76mm turbine 58mm-65mm 9cm housing
he351- compressor 59.5mm-86mm turbine 58mm-65mm 9cm housing

It feels like the he351 spools a few hundred rpms later but has more pull at topend. Just feels smoother though with the he351 vs the he341. I think my next move is to sell these 740's and switch back to E85 and buy some bigger injectors and throw the He351 back on and run 20 psi daily. Wider stickier tires and a stronger clutch will be needed at that point.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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Post by basic »

you ever get a chance to throw the HE351 on and dyno it with that? Curious of the difference.
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Post by Super Coupe »

That backside of the turbo is holding you back.
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Post by casman86 »

I doubt that. There was a dsm trapping 133mph at 33psi full weight with the hy35. 133mph supposedly puts it at 600whp. I don't know why people go to the big laggy housings.
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Post by Kfred »

Super Coupe wrote:That backside of the turbo is holding you back.
It doesn't look like the torque is falling off too bad to me. His hp peaked at 6500 (405whp) and he made 400whp at 7000rpms. His power band looks excellent if you ask me. Its responsive enough for the streets and has enough power to bring home 11 second time slips.

If he had a better flowing turbine/housing he could make more hp. That could be said for 99% of all ka-t setups. The question is, would he enjoy the car more with a bigger turbine housing.
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Post by Super Coupe »

casman86 wrote:I doubt that. There was a dsm trapping 133mph at 33psi full weight with the hy35. 133mph supposedly puts it at 600whp. I don't know why people go to the big laggy housings.
I believe you have your facts incorrect, I believe you are speaking about the 7 blade hx35 NOT the HY which you said. Pulled directly from dsmtuners.

The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

This also pulled from dsmtuners about the Hy35.
HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.




Anyways the OP is not using either. He is using a HE351/41


Just a note to add, those people who have used HE's and switched to a HX note a faster spool with more power.
Last edited by Super Coupe on Thu Mar 01, 2012 10:06 am, edited 2 times in total.
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Post by Super Coupe »

Kfred wrote:
Super Coupe wrote:That backside of the turbo is holding you back.
It doesn't look like the torque is falling off too bad to me. His hp peaked at 6500 (405whp) and he made 400whp at 7000rpms. His power band looks excellent if you ask me. Its responsive enough for the streets and has enough power to bring home 11 second time slips.

If he had a better flowing turbine/housing he could make more hp. That could be said for 99% of all ka-t setups. The question is, would he enjoy the car more with a bigger turbine housing.
I understand his setup is not bad. However it seems as if he wants more power, the hx35 or 40 with a BEP housing would be the better option for him as I dont see him making much more power with that turbo.
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Post by rn240sx »

20 lbs on 93 octane…??? U got brass balls…!!
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Post by airman »

20psi isn't THAT scary on pump gas, 30psi is pushing it :D

Good looking dyno. Can't wait to turn my boost up on my hx35.
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Post by jmac636 »

Kfred wrote:
Super Coupe wrote:That backside of the turbo is holding you back.
It doesn't look like the torque is falling off too bad to me. His hp peaked at 6500 (405whp) and he made 400whp at 7000rpms. His power band looks excellent if you ask me. Its responsive enough for the streets and has enough power to bring home 11 second time slips.

If he had a better flowing turbine/housing he could make more hp. That could be said for 99% of all ka-t setups. The question is, would he enjoy the car more with a bigger turbine housing.
This a daily driven street car that is fun to drive. I daily it at 15psi. I hardly ever run 20psi. I have other vehicles but it depresses me to drive them HAHA.
Last edited by jmac636 on Thu Mar 01, 2012 11:13 am, edited 1 time in total.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
jmac636
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Post by jmac636 »

I'm actually really happy with the power level I am at now. I don't want a dyno queen or a drag car. I am little more interested in getting into drifting soon. I will be going to Precision 5431e for some fast spoolin action and hopefuly can still make 350 whp. I don't care to make 800 whp at 9000 useless rpms. It's under the curve that counts.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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Post by casman86 »

Super Coupe wrote:
casman86 wrote:I doubt that. There was a dsm trapping 133mph at 33psi full weight with the hy35. 133mph supposedly puts it at 600whp. I don't know why people go to the big laggy housings.
I believe you have your facts incorrect, I believe you are speaking about the 7 blade hx35 NOT the HY which you said. Pulled directly from dsmtuners.

The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

This also pulled from dsmtuners about the Hy35.
HY35:

The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.




Anyways the OP is not using either. He is using a HE351/41


Just a note to add, those people who have used HE's and switched to a HX note a faster spool with more power.
No, it's definitely an hy35, and there's quite a few of them. I was surprised too, since the myth seems to be that the hy35 is only good for 400whp
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I do understand that's on a slightly smaller motor though.
Jmac, do you feel like the holset is not responsive enough for drifting?
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Post by Lopin18 »

Im doing a KA24e with this same turbo, inspired on this thread too :P its mounted and everything, just havent raced it because i havent tuned and ill be getting rods this month.

Also drifting it, so i hope this turbo meets what i need. (Stock head, Top mount centered Gladman mani, O&J Hyd Cam Stg 2)

ALSO its not a HY35 per say, its an HE341, and whats that about the HX35 spooling faster? any bases, experience? didnt know that... =|
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Post by casman86 »

HX35 definitely wouldn't spool faster. The entire reson for going with an HY35 over an HX is the smaller exhaust housing to spool faster. He's probably referring to dsm's that run the aftermarket BEP bolt-on exhaust housing on HX35's with a much smaller a/r.

I'm close to finishing my HY setup on my s14 as well, and also hoping it will be responsive enough for drifting.
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Post by airman »

Forgive me for asking if it's been said, but how much timing are you running at 20psi?
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Post by DC47A »

wow great numbers and nice car!
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Post by jmac636 »

It's hard to say exactly how much timing, at peak torque it is at 9 degrees then as rpms rise the torque falls and timing is added. Thats where you see it holding 400 whp. Its definetly good enough for drifting. I see positive pressure start to build at 3000 rpms. I haven't seen too many powerbands like what I have now. To me its not about the max power. I am more concerned with the curve. When it gets warm outside I will be switching back to E85 and some 1000cc injectors. I would like to see what this he341(hy35) can do over 20 psi. I know there is a major difference between 15 and 20 psi with this turbo. I bet 25 psi and E85 would get me close to 500 with a more advanced timing map of coarse.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
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Post by sr20drag »

The HY35/HE351's are GREAT turbo's for the KA-t. It spools like a T2 2871R and makes 400whp on pump gas and 450-500whp on E85. And you can buy them for $300 all day long. Can't really beat them on stock cams.
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Post by sdaigle240 »

holy crap jmac!!! i never saw this tread. this is awesome!! i hope my HY puts down the similar numbers.

you ditching the precision turbo idea? my hy makes ~20psi by 3500 and full spools within 3-500rpms when punched. i drift on 16psi. actually i think i can afford to loose another 500rpms and go with an hx40 someday. i would stick with the 341 for drifting. ive let our "best driver" drift my car on only 12psi and he loved it coming from a t28 sr20.
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Post by Walperstyle »

so, whats the next project?
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Post by jmac636 »

I sold this car a few weeks ago cause I don't need 2 nice 240's that I'm scared to destroy. I bought me an s13 coupe with a redtop in it for $2k. I'm building me a drift slut. I could have never drifted the red car. It was just too nice. Also, I'm in the process of building another ka-t car for a relative. Should be done in a few weeks.
1995 S14 daily built block nismotronics sr20det Ecu running my ka-t, synergy green S14 5.3l turbo 240sx 1/4 mile traps 135mph on 13psi and dr's.
Holset HE341 Install thread woohoo!!
viewtopic.php?t=48692
http://www.playloudclothing.com/
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