Polaris Slingshot Forum banner
41 - 60 of 73 Posts

· Registered
Joined
·
874 Posts
Jonv's kit is not 5400$ but 5200$, with an option to a unique v-mount radiator/ intercooler for 350$ more.
 

· Registered
Joined
·
874 Posts
Its 725$. At 300hp I dont think it will change much for power output

Compared to the stock Alpha setup that uses an adapter plate to fit the triangle flange of the stock header to the square flange of the turbo and offset it so that the turbo clears, its a cleaner install and flow path, and less chance of a leak because you fit the turbo direct to the header.

For me its worth it, I dont like the plate solution.

That looks like a JonV header.. How much better is that over the stock header and how much does it cost? :greedy:
 

· Vendor
Joined
·
542 Posts
How much better is the flow and would it increase the HP? I know equal length tubing is supposed to be better and yes it is sexy.
Could you Just get a JonV header and have say an Alpha kit made to work with it?
Here is an alpha turbo kit manifold we build. They are specific to the alpha kit, so you don't have to change anything at all, it's a direct bolt on.

 

· Registered
Joined
·
481 Posts
Discussion Starter · #48 ·
Here is an alpha turbo kit manifold we build. They are specific to the alpha kit, so you don't have to change anything at all, it's a direct bolt on.

View attachment 25185 View attachment 25186 View attachment 25187
Hey JonV!

Thank you for taking the time to post in the tread and share that with everyone else! Do you happen to know how much of an improvement over the stock header it gives you? I am also curious of the material that you use for the header.

Such a beautiful piece of work, great job man.
 

· Vendor
Joined
·
542 Posts
i don't know power gains. No one has tested them on the dyno yet. The manifolds are made of 304L stainless steel are .109 thick. The flanges are mild steel, to reduce warping and distortion over time from heat.
 

· Registered
Joined
·
874 Posts

· Vendor
Joined
·
542 Posts
Hey JonV,

How much would it cost to do full titanium? :rolleyes:
Sadly titanium will collapse on itself from the heat of a turbo manifold. I can't make them, which sucks cause I love titanium.
 

· Registered
Joined
·
5,881 Posts
Sadly titanium will collapse on itself from the heat of a turbo manifold. I can't make them, which sucks cause I love titanium.
He is absolutely correct. It is a beautiful product when used in certain applications but it wont stand up to red hot temps. We found this out on a drag bike we had many years back. It would also get super brittle in our case. Is that what you also experienced JonV? I do like the colors that it changes
 
  • Like
Reactions: WI_Hedgehog

· Registered
Joined
·
666 Posts
I just want to throw this in the mix boost #s can be deceiving I run a 6/71 blower in a 28 Ford with a SBC I was running 14 lbs or 1bar if you want metric and putting 500 whp out I changed for a much better set of ported heads nothing else my boost dropped to 11 pounds but hp went to 596 with same dyno same correction factor so boost is a lot related to air flow restriction so opening up heads or changing cams can make more hp but show less boost. I am sure most of you knew this but this was for the slow ones like me.
 

· Vendor
Joined
·
542 Posts
He is absolutely correct. It is a beautiful product when used in certain applications but it wont stand up to red hot temps. We found this out on a drag bike we had many years back. It would also get super brittle in our case. Is that what you also experienced JonV? I do like the colors that it changes
No, I have done enough reading to keep myself from making the mistake personally.
 

· WHAT HAPPENED HERE?
Joined
·
2,221 Posts
I have $6k in mine.
 
41 - 60 of 73 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top