My 35R EVO build is almost done!!!! ( a few progress pics for you guys)
Thread Starter
Evolving Member
Joined: Sep 2005
Posts: 163
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From: Lewisville, TX
Originally Posted by atlvalet
Are you going to thermal coat any of the exhaust parts?
The car is still stock internals besides head studs and cams
Thread Starter
Evolving Member
Joined: Sep 2005
Posts: 163
Likes: 0
From: Lewisville, TX
longer runners make more power and the wastegate placement should completely eliminate boost creep. I know everyone says its never gonna spool but its a ball bearing turbo, the spool up difference should be negligable and I'll make it up on the top end. I dont plan on highway racing, just drag and I will have the two step set-up so lag wont be a problem.
Hey guys, i'm Tony, the one that is doing the fabrication on this project. Thanks for the comments.
There is a big misconception that longer runners automatically equals slower spool, but it is not true. It can be true, but it is very dependant on the turbo size and the manifold design and build. With a small restrictive turbo you will have alot of exhaust backpressure and the manifold design won't make much difference in power, as you've seen with stock evo setups. As you get closer to a 1:1 pressure ratio from intake to exhaust, things start changing a bit. You can run a much more aggressive cam profile, your knock limit is raised, and you can take advantage of a "tuned" header. We don't know exactly what this is going to do with this setup, but our research shows that it should perform well. There's a reason you see stuff like this on race cars. Ever seen John Shepard's engine bay? We'll know for sure soon enough when we hit the dyno with it, and we'll be sure to keep you guys informed on the results.
-Tony
There is a big misconception that longer runners automatically equals slower spool, but it is not true. It can be true, but it is very dependant on the turbo size and the manifold design and build. With a small restrictive turbo you will have alot of exhaust backpressure and the manifold design won't make much difference in power, as you've seen with stock evo setups. As you get closer to a 1:1 pressure ratio from intake to exhaust, things start changing a bit. You can run a much more aggressive cam profile, your knock limit is raised, and you can take advantage of a "tuned" header. We don't know exactly what this is going to do with this setup, but our research shows that it should perform well. There's a reason you see stuff like this on race cars. Ever seen John Shepard's engine bay? We'll know for sure soon enough when we hit the dyno with it, and we'll be sure to keep you guys informed on the results.
-Tony
Originally Posted by Tony1
Hey guys, i'm Tony, the one that is doing the fabrication on this project. Thanks for the comments.
There is a big misconception that longer runners automatically equals slower spool, but it is not true. It can be true, but it is very dependant on the turbo size and the manifold design and build. With a small restrictive turbo you will have alot of exhaust backpressure and the manifold design won't make much difference in power, as you've seen with stock evo setups. As you get closer to a 1:1 pressure ratio from intake to exhaust, things start changing a bit. You can run a much more aggressive cam profile, your knock limit is raised, and you can take advantage of a "tuned" header. We don't know exactly what this is going to do with this setup, but our research shows that it should perform well. There's a reason you see stuff like this on race cars. Ever seen John Shepard's engine bay? We'll know for sure soon enough when we hit the dyno with it, and we'll be sure to keep you guys informed on the results.
-Tony
There is a big misconception that longer runners automatically equals slower spool, but it is not true. It can be true, but it is very dependant on the turbo size and the manifold design and build. With a small restrictive turbo you will have alot of exhaust backpressure and the manifold design won't make much difference in power, as you've seen with stock evo setups. As you get closer to a 1:1 pressure ratio from intake to exhaust, things start changing a bit. You can run a much more aggressive cam profile, your knock limit is raised, and you can take advantage of a "tuned" header. We don't know exactly what this is going to do with this setup, but our research shows that it should perform well. There's a reason you see stuff like this on race cars. Ever seen John Shepard's engine bay? We'll know for sure soon enough when we hit the dyno with it, and we'll be sure to keep you guys informed on the results.
-Tony
