Builds My turbo build...FINALLY! (1 Viewer)

[MS-75]

I also did another build on the same type of car 8 years ago That one used factory manifolds (not quite log but not header either). That one was 600hp but needed 20psi to get there. On the street the car with the factory manifolds was much more fun to drive. Boost response was fantastic. Power was always there between shifts. The car with headers (and cams) is much better on the track but on the street it does suffer from boost drop (ie lag) between shifts at lower RPM's. Both cars used the dual GT2860 disco potatos. Can't get a much better comparison than that.

Building turbo systems from scratch is fun. Keeping realist goals in mind and being honest about the application will result is a happy build everytime.

Mate - comparing the boost threshold between two examples of the same engine when they are running different cams, and putting the difference down to the exhaust manifolds - shows no understanding or experience of how camshaft changes affect boost threshold.

Changing cams alters the volumetric efficiency profile of the motor and as such alters the point at which the motor is shifting sufficient air mass for the turbo to cross the boost threshold. The bigger the cams the further up the rev range the torque curve is moved and the later in the rev range the turbo will cross into positive pressure.

I suggest you spend some actual time on the rollers, swapping cams, manifolds turbos, timing curves, fuel types in controlled back to back conditions to better grasp the concepts.

 

[Madness]

Mate - comparing the boost threshold between two examples of the same engine when they are running different cams, and putting the difference down to the exhaust manifolds - shows no understanding or experience of how camshaft changes affect boost threshold.

Changing cams alters the volumetric efficiency profile of the motor and as such alters the point at which the motor is shifting sufficient air mass for the turbo to cross the boost threshold. The bigger the cams the further up the rev range the torque curve is moved and the later in the rev range the turbo will cross into positive pressure.

I suggest you spend some actual time on the rollers, swapping cams, manifolds turbos, timing curves, fuel types in controlled back to back conditions to better grasp the concepts.

LOL....you have no idea. If you want to get into a hang off be my guest. I have been involved in developing several turbo kits on various marques. Tuning, header design, turbo sizing and camshaft selection was done each and every time. Dyno checks at each stage proved what works and what does not. The examples above are from two well developed versions of the same motor for two different applications. Camshaft selection, turbo sizing and header design all have to work together. BTDT.

 

[DHwreckage]

why are there not finished pictures of landtanks new engine and what happened to the turbo manifold?

 

[landtank]

OK it's time to call this project. As much as I've wanted to get back into it other things have gotten in the way. The main issue has been with a local source for proto typing. If I had any talent with fabricating it would have been done by now.

So I'm posting it up here first and then will take it to the classifieds.

What you won't get:

a finished running 80 with a turbo!

What you will get:

A 1997 CE tan triple locked 80 as the donor truck
A rebuild engine with a turbo mounted, 3" mandrel bent exhaust, needs an intercooler and air intake.
A spare turbo manifold
The pattern and core box to cast more manifolds
All the CAD drawings for the manifold and heat shield.

And my best wishes to bring this project to completion and possibly to market.

The truck has been sitting in my yard the last few years and mice have made their way into it. So it smells.

Pm me if interested.