I dont know if its off topic if i talk other engines, but:

I dont have experience or read a lot about NYES engines.

To me personally there are 2 choices when it comes to go bang/buck-ratio crate engines with reliable producers:

- Mark jones / vortecpro (top choice) - I got an engine from him myself and i remember a 406 SBC he did with AFR 227 heads on pump gas with 650 hp..

- blueprint (they seem to react properly when there is a engine problem after purchase) - both their 396 and 400 offer fully forged rot. assemblys and around 500 lbft/hp..

There are certainly more good choices, but about those above i researched a lot..

 

I did look at blueprint which has a great warranty. The issue for me is that the motor likely has key parts in it which may be of a lesser quality than more expensive motors ( you get what you pay for ) I'd rather spend more and get higher quality pieces / components. I went through a situation recently on a SBF 427 for a mustang I own. Even though it was a reputable builder, I had parts fail on 3 occasions which cost me dearly ie: motor came out and went back to the builder for a full tear down / rebuild. House brand roller rocker failed on one instance, lifter retainer ( dog bone ) broke on another instance causing lifter to rotate and tear up the cam and on a third occasion after the motor has been rebuilt , the cast had roller cam ( comp cams ) wasn't properly hardened and after 500 miles the lobes went away and spit debris in the motor. I had so much bad luck with that engine that I am gun-shy . I'll spend more to get reliability and piece of mind so no low budget builds for me.

 

I have a NYES built 454, actually, I dropped my 454 off to them and they built it with my choice of cam, heads, pistons. I supplied all the parts and they did the machine work and assembly and Dyno testing. Pat has my 331 Hemi right now doing the same thing. The only knock on dealing with NYES would be don't be in a hurry because they sure aren't. He's added a couple more Rottler machines over the summer. Couple pics of the shop

20211116_141933 by F G, on Flickr

20211116_141925 by F G, on Flickr

 

I got a Nyes 427 sbc in 2021. Pat was very helpful and easy to work with. I chose them based on the parts they use, price and flexibility. I was adding power brakes at the time and wanted to make sure I had enough vacuum. I also wanted to be able to cruise at lower rpm's. Pat chose a camshaft that gives me 14" of vacuum at idle and the brakes work great. He also let me send him my MSD distributor to use. He replaced the distributor gear to match the cam.

It did take longer than expected due to supply chain issues. When I ordered it in April 2021 I was told it should be done in 6-8 weeks. They had a problem getting a cam ground and it ended up taking 6 months.

The engine runs great. I have about 2000 miles on it now. I was told to run 93 octane. The only issue I had was after about 600 miles I got a small oil leak in the back of the pan. Pat was very responsive with any questions and advice. It was a small enough leak that I drove it all summer before pulling the engine. If I lived closer I probably would have asked them to replace the gaskets but it was easier and faster just to do it myself. If I had to do it over again I would probably still choose Nyes based on how well the engine runs and how responsive they are to any questions. The oil leak was disappointing but things happen.

 

Thanks for the info... Do you happen to have the cam card or know the cam specs so I could reference it if I order a motor from them. Also their motors are noted as 10:5 to 1 compression. Did they build yours with lower compression. They proposed building mine at 10:0 to 1 so it could run on 91 octane.

 

They built mine with 10.5 to 1 since I can get 93 octane. They use Erson cams. I got the impression that Pat worked with them to spec out a cam that worked for me. Here is my cam sheet

 

Thanks for the info.

 

I have a video of it running right after installing the engine and a video of the exhaust after new exhaust was added. They are mp4 files and the site will not let me attach them. Do I need to convert them to another format to attach?

 

Upload the mp4 file to YouTube and post the video link