EME-Hand built diffuser!!!

[oricale]

Just finished a custom Evolution diffuser/custom side exhaust for Heliums ZR1....thoughts?
https://uploads.tapatalk-cdn.com/20170307/f1b2283b0325e53fb9730bbffe5c78fb.jpghttps://uploads.tapatalk-cdn.com/20170307/7e7883df7d3f5764fd28a0c6b100f732.jpghttps://uploads.tapatalk-cdn.com/20170307/7fe72ade982dfc552fd59dbf5e45c612.jpghttps://uploads.tapatalk-cdn.com/20170307/c3edc33eef7f9b65d2588229437d0974.jpghttps://uploads.tapatalk-cdn.com/20170307/f516d31d367f2bbd18fbfd962d58efee.jpghttps://uploads.tapatalk-cdn.com/20170307/529684c25997d4e5b23c0684ed774c76.jpg

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[ssrszz4]

nice

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[RussMcB]

Pretty cool!

My gut feeling is the strakes should be straighter, in line with the car, because (I think), their purpose is to prevent the air from spilling in from the sides. At least, that's what wing fences are for.

on edit: I see the cardboard prototype's strake angles look more like what I've seen before.

Looks cool. Hard to tell how much it might help.

Do you have time booked at the wind tunnel? :-)

[Arctic91]

Looks good!

Scott

[billschroeder5842]

Wow- what great work! Well done.

[Thomas ZR-1]

Wow- what great work! Well done.
Yes, good job...10 year ago I replaced my useless stock spare tyre with this, a little smaler diffuser because without a cover in the rear the uplift at higher vehicle speed on the highway makes the rear axle quite nervously.

http://up.picr.de/28529445jf.jpg

http://up.picr.de/28529446jd.jpg

http://up.picr.de/28529447yn.jpg

[billschroeder5842]

http://up.picr.de/28529447yn.jpg

Thomas, what kind of exhaust system is that? Are you happy and how does it sound?

I have a MagnaFlow resonator on my 91 with stock mufflers. I'm mostly happy but would like a bit more.

[Thomas ZR-1]

Hi Bill, the sound is perfect in my ears (some grandmas getting their little dogs blown away on the street!)....sounds like a race car! But inside the car it`s more silent than outside. I was afraid when I was standing outside the car during dyno-testing.

I welded whole system by myself...behind the Stainless Works headers, it`s all 3 inch size. There are two 100 cell cats followed from a muffler-dummy with a H-pipe inside. At the rear there are 2 mufflers with 3 inch inlet and 2 x 2.5 inch outlets. The 4 exhaust tips are from a truck supplier at eBay.com

[GOLDCYLON]

I replaced my useless stock spare tyre with this, a little smaler diffuser because without a cover in the rear the uplift at higher vehicle speed on the highway makes the rear axle quite nervously.

Actually Thomas that useless spare tire is used as a part of the safety calculation engineering wise if your rear-ended, Which is why GM added the Spare tire delete reinforcement bar if you don't have a spare

Here is a picture of the Spare Tire Delete Bar from GM in position on my son's 96 Grand Sport


https://cimg0.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/1152x864/80-spare_delete5_66ca7c783a01c46d9b35268ae62092abd10a 116f.jpg

[lfalzarano]

Just finished a custom Evolution diffuser/custom side exhaust for Heliums ZR1....thoughts?
https://uploads.tapatalk-cdn.com/20170307/f1b2283b0325e53fb9730bbffe5c78fb.jpghttps://uploads.tapatalk-cdn.com/20170307/7e7883df7d3f5764fd28a0c6b100f732.jpghttps://uploads.tapatalk-cdn.com/20170307/7fe72ade982dfc552fd59dbf5e45c612.jpghttps://uploads.tapatalk-cdn.com/20170307/c3edc33eef7f9b65d2588229437d0974.jpghttps://uploads.tapatalk-cdn.com/20170307/f516d31d367f2bbd18fbfd962d58efee.jpghttps://uploads.tapatalk-cdn.com/20170307/529684c25997d4e5b23c0684ed774c76.jpg

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)



That is a fantastic custom job!!!!! Outstanding.


Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)

[Jitse]

Looks nice!
Did you closed the front part of the diffusor some way? The area from the suspension.

[oricale]

Yes I did😉
https://uploads.tapatalk-cdn.com/20170308/25a3cde349ca96822c8a5be44bc81699.jpg

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[BigJohn]

Just finished a custom Evolution diffuser/custom side exhaust for Heliums ZR1....thoughts?
https://uploads.tapatalk-cdn.com/20170307/f1b2283b0325e53fb9730bbffe5c78fb.jpghttps://uploads.tapatalk-cdn.com/20170307/7e7883df7d3f5764fd28a0c6b100f732.jpghttps://uploads.tapatalk-cdn.com/20170307/7fe72ade982dfc552fd59dbf5e45c612.jpghttps://uploads.tapatalk-cdn.com/20170307/c3edc33eef7f9b65d2588229437d0974.jpghttps://uploads.tapatalk-cdn.com/20170307/f516d31d367f2bbd18fbfd962d58efee.jpghttps://uploads.tapatalk-cdn.com/20170307/529684c25997d4e5b23c0684ed774c76.jpg

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)




Cool, how did it do in the wind tunnel?

[oricale]

I used a smoke machine and our pressure fan...did alright for the equipment i had. The airflow did seem breakup near thr exhaust and flow decently through the veins.

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[BigJohn]

Are you going to complete a belly pan?

[ghlkal]

What a nice fab job. Good work :cool:

[oricale]

Are you going to complete a belly pan?
Not at this time...for the Ultralite we may do even more design and fab😎

Sent from my SAMSUNG-SM-G935A using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)