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The apex in our area still go high cause people are using them for airplanes and other uses. I would like to own one. Just not at 4-5000 when nytros go for 3000

Maybe an injector is not firing or clogged ?

Both my turbos use a stock apex fuel regulator with a return to tank fuel rail fitting. Works well and it is a 1 to 1 regulator

Order up a wallbro gsl 392 best pump for the nytro turbo I have went thru a few msd pumps before I started using wallbro. Don’t worry about using stock nytro pump as it is close to not enough fuel for the turbo anyway. Just buy some wallbro fuel pickups. one in front and one in back and your...

Another option is to use this alluminum shield material it’s what the sidewinder exhaust covers are made out of and it would shield the Uhmw from being melted.

I would commit to the hdpe it is a durable product and lite and it will advance your project as it is easy to use. I used it on my old tube tunnel I used 1/8” and riveted it on and it still is holding up wheel 10000 km later. I would use 1 whole piece from front to rear of tunnel it’s stronger...

I got a few more rides left in me. Just gets harder to get to the snow.

I would weld tabs and rivet it. With the amount of work you have put in this what’s another 1hr for a nice finished product. And hdpe is great I used it on my old tube frame tunnel and it held up great

I use mobile 1 0-40 in my nytro for 13 years both euro and regular. You can’t kill these sleds with brand of oil. Only too much boost or loose oil thru filter hit or such.

Just an fyi for you I found my old nytro rad and fan with plastic shroud on it and weighed it at 4lb 2 oz. Filled with water it is 5 lb 2oz. I think you got it figured now anyway. Just wanted to document those numbers on your thread

I forgot you were not going with a bulkhead cooler. I’m not sure about deleting that cooler as that is where the snow has to go thru and I think would provide more cooling than the tunnel cooler. Just my thoughts. I think I have a nytro rad kicking around if I can find it I will fill with water...

I wonder what a small rad and fan would weigh compared to the rear cooler. Reason I ask is my viper has no rear cooler just bulkhead cooler and rad and it does not overheat on the trail with the 3” track even. Also the lack of ice build up is sure nice as my old nytro and yamalaris ice up like...

Ya you might as well cut some off the tunnel as that’s what the trend is nowadays. And a few less pounds won’t hurt your goal. My turbo viper I bought with a shorter tunnel and it seems fine just have to watch wheeling as it can come over backwards. The first time it happened to me was a bit...

Ya I bought one off Amazon for $100 worked well solved my problem. Fox I pm ‘d you

It could be a coolant air lock. Mine did this earlier this year and I did a leak down test and blue test and also put overflow in a bottle and all were good. Mine would be fine idling down the hard trail but overheat when in full throttle. I finally vacuum filled the coolant system and have not...

Nikolai keep pushing forward with the build it will be worth it once it hits the snow.

I totally understand what you are saying. I had plans to build a turbo nypro and have most of the stuff to do it but gave up that project and bought a turbo viper done up to the nines and am riding the he’ll out of it this season. Seems I barely have time to fix the iron I have anymore. Hard to...

Thanks for the replies guys. I think I hit it figured. I did a leak down test and it was 2%in 2 cylinders and 3%in the other. I also drained and vacuum filled the coolant system and I believe there was an airlock in there. As when I tested it in the mountains at the same location and conditions...

No just the stock front heat exchanger and rad and fan.

So I did a block test and fluid stayed blue. So maybe it’s just a coolant airlock hopefully vacuum fill tonight and test again