You can type here any text you want

New Engine Build

Welcome!

By registering with us, you'll be able to discuss, share and private message with other members of our community.

SignUp Now!
I can already see the 4.1 SFI Turbo emblems on the hood. If of course, your wanting people to know. If not, I feel sorry for anyone that already underestimates the Grand National's power. I can't wait to see this in action. I thought the Grand National on youtube with the Duramax deisel engine was out there. This is a sweet build. Definately keep everyone posted.
 
I realized I need to make a clarification on my earlier post about the bad intake manifold. It wasn't until we got it back off and took a much closer look that we realized one of the ears had been broken off and repaired. I don't blame KT Engine Development. It's too bad whoever sold it didn't spend as much time making sure the repair was done right instead of hiding it.
 
Well it's been a while .. Any updates on this ??? I may have a good used one here if ya still haven't fixed it yet:confused: I am curious how much power a 4.1 can take :cool:
 
Thanks for the interest

It has been a journey one of lessons and some dissapointments.

We did put her on the dyno and with no tune and an improvised wastegate spring rated for 1psi. We made some small load pulls. We actually ran into several issues and made the pulls anyway.

The first being with the intake manifold, I bought as a set used with the Champion cylinder heads. Anyway it was leaking water into the valley as a result. So I took my stock manifold and installed it, we then found the cylinder heads themselves were cracked around the stud bosses at the rear and front of both heads. This was very dissapointing because I pressure tested the heads prior to machining with no issues. So I had to take them down get them welded put them in the mill and spot face the bosses. Blah, blah, blah. Mind you I have a job too, so things have been going slow to say the least.

Anyway the engine with the tune I had on the engine in my sig which was basically a seat of the pants tune. It made peak torque of 309 ft lbs at 3600 rpm and held it to 6000rpm and again that was at 1 - 1.5 psi.

When I get a moment I will run a leak on her, with the sump it should have been pulling vac and while running I experienced an oil leak from the valve covers. So I need to make sure we didnt lose lubricity of the cylinders and hurt ourselves with all the water.

So anyway, since I am doing most of the work and it is quite a distance from the house. The inch at the goal line is taking the longest and is the hardest.

The intake manifold is being match ported to the cylinder heads and then sent off with a larger plenum to Calico for coating.

More to come!!
 
Nice. My build is real similar to that one. I had Paul Vanderley do mine though!! ;)
 
Slow Progress

Progress has been slow, but she is finally at home. Here are a few looks.

As I have said in other spots on this forum, what doesn't kill you will only make you smarter and stronger. I'll post more as they become available.

We never really turned up the boost on the dyno, I was uncomfortable with the fuel set up as my friends at KT rarely deal with fuel injected. So we did make the necessary pulls to make sure the engine was finally sound mechanically.

And there is something to be said for having people around who have worked on this specific platform before. Well trust me, we at KT's found what had to be every little issue. So if you want someone to do some good machine work they are now broken in - lol.
 

Attachments

  • 02_2009 FULL ENGINE_WEB.JPG
    02_2009 FULL ENGINE_WEB.JPG
    37.1 KB · Views: 143
  • 01_2009 FULL ENGINE BAY_WEB.JPG
    01_2009 FULL ENGINE BAY_WEB.JPG
    42.1 KB · Views: 141
  • 03_2009 JOHNSON PUMP_WEB.JPG
    03_2009 JOHNSON PUMP_WEB.JPG
    35.5 KB · Views: 139
  • 04_2009 INTERCOOLER PIPE_WEB.JPG
    04_2009 INTERCOOLER PIPE_WEB.JPG
    26.4 KB · Views: 139
Video

nice video. cant wait to see the rest.



Me either - seems I may have taken a little to long. I am not sure if there is anymore professional footage to come.

Here is a shot of the engine in the car with all the belts. As you can see I moved the power steering pump to the passenger side to accomodate the oil pump. I also added another idler pulley on the drivers side to allow for proper wrap around the accessory pulley.
 

Attachments

  • BUICK BUILD(INSTALLATION)_ 8_01_09 002_web.JPG
    BUICK BUILD(INSTALLATION)_ 8_01_09 002_web.JPG
    40.1 KB · Views: 72
Back
Top