3TCGARAGE.COM

Hey guys,

I'm planning on rebuilding my 2TC over the winter, oh Canada. I currently have golf ball pistons in it and I want to get more power from this engine.

Question 1, what is the compression ratio for these stock pistons?

Question 2, what sort of power would I get from 11:1, 12:1, 13:1 CR pistons, with a mild-ish cam?

I have an MSD 6AL for ignition, OER Racing carbs (45mm) for fueling.

Thanks,
Gerry

gotae86 wrote:Hey guys,

I'm planning on rebuilding my 2TC over the winter, oh Canada. I currently have golf ball pistons in it and I want to get more power from this engine.

Question 1, what is the compression ratio for these stock pistons?

Question 2, what sort of power would I get from 11:1, 12:1, 13:1 CR pistons, with a mild-ish cam?

I have an MSD 6AL for ignition, OER Racing carbs (45mm) for fueling.

Thanks,
Gerry

What are you looking for when you are finished? Drag racer, hot street car, road racer...

Ideally you want to match the compression to the camshaft, so asking a compression question, while giving us a vague camshaft variable... will not offer you a great deal of useful answers. What camshafts are you considering (duration and lift)?

I'll be using the car for drifting and lapping days.

The cam I was looking at was the Schnieder 288F cam, Duration (gross): 288 and Valve Lift*: .504"

gotae86 wrote:I'll be using the car for drifting and lapping days.

The cam I was looking at was the Schnieder 288F cam, Duration (gross): 288 and Valve Lift*: .504"

Part Number: N/A
Grind Number: 288F
Intake Duration (gross): 288
Exhaust Duration (gross): 288
Intake Duration (.050”): 254
Exhaust Duration (.050”): 254
Intake Valve Lift*: .504"
Exhaust Valve Lift*: .504"
Lobe Separation: 108
Intake Valve Lash: .018"
Exhaust Valve Lash: .018"
RPM Range:
3200-7200
*Based on 1.4 Rocker Arm Ratio


there isn't a timing card I could find (to verify intake valve closing event)... but 288 duration is going to call for compression above 11 to 1 (in my humble opinion) The Schneider cam lists 3200-7200, so there isn't going to be a lot of low end with this cam.

What would be your guess at horsepower at the wheels?

Does anyone have dyno graphs of their setups?

gotae86 wrote:What would be your guess at horsepower at the wheels?

Does anyone have dyno graphs of their setups?

it truly depends on the quality of the build...

poorly put together with improper machining, and poorly matched parts... under 100hp, and a dog to drive... With the correct machining, parts and assembly, ~135 whp

oldeskewltoy wrote: it truly depends on the quality of the build...

poorly put together with improper machining, and poorly matched parts... under 100hp, and a dog to drive... With the correct machining, parts and assembly, ~135 whp

Sounds like a good time in a lightweight car. Thanks for chiming in.