muskrat
Pro
I have CPR turbo and am only pulling like 9800 r's. 75.5 g up front , silver secondary with 100 degrees of twist and a 56/40 helix. Do I need a diff helix because of the roller or will white spring at 80-100 work? Thanks for your help>
Muskrat
Muskrat
Buckeye
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What roller sec? The helix would be fine for a stock secondary. It would be a bitch to twist the white to 80, never mind 100. Definitely a 2 man job. Maybe drop the weights to 73.5 grams each.
muskrat
Pro
rpm's
Hi Buckeye
I have a Hauck Roller secondary and three helix to choose from. Simon sent 56/40 but that's way to much. I did pull 2 grams out of total weight and it didn't make a lot of diff. I even used the stock helix and my r's were still too low. The third helix is a Hauck looks like a 51 0r so. As a matter of fact I didn't see much change in rpm's no matter what helix I used. Does this mean too much weight in primary? I have a ripsaw and extroverts so I hook up well. At 10 lbs boost my setup is right on with 74.7 up front hauck helix and white at 80. I am trying to get a setup for low boost. I ran out of time and temp here is in the 50's now. I'll try the 73.5 next time I get out. Thanks.
Hi Buckeye
I have a Hauck Roller secondary and three helix to choose from. Simon sent 56/40 but that's way to much. I did pull 2 grams out of total weight and it didn't make a lot of diff. I even used the stock helix and my r's were still too low. The third helix is a Hauck looks like a 51 0r so. As a matter of fact I didn't see much change in rpm's no matter what helix I used. Does this mean too much weight in primary? I have a ripsaw and extroverts so I hook up well. At 10 lbs boost my setup is right on with 74.7 up front hauck helix and white at 80. I am trying to get a setup for low boost. I ran out of time and temp here is in the 50's now. I'll try the 73.5 next time I get out. Thanks.
adirondac blue
TY 4 Stroke Junkie
I am running around 9800 at 7.5 and then when you go to 9.5 it runs around 10100. The dyno sheet on the web site(cpr) says 9800 to 10300 the power is the same.Then at 12 lbs you get close to the rev limiter, just in case you need the extra boost.
PS I run 50/50 all the time.
PS I run 50/50 all the time.
muskrat
Pro
boost
Hi adironak blue,
I plan on running 50/50 all the time too since the thicker head gasket didn't work out. Occasionally though we will do a 400 mile ride with only prem avail. What octane do you mix? I should probably take my O2 sensor out with all that race gas. By the way, I am waaay to chicken of burn down to run 12 lbs. Just thought of another question. On 10 lbs yesterday I had to chop throttle and hit the brakes. TREES! That caused weird stuff to happened. It was like the engine was dying or had fried. I think it was out of gas. I don't have a BOV, do I need one. Guess I need to change my driving style a little.
Muskrat
Hi adironak blue,
I plan on running 50/50 all the time too since the thicker head gasket didn't work out. Occasionally though we will do a 400 mile ride with only prem avail. What octane do you mix? I should probably take my O2 sensor out with all that race gas. By the way, I am waaay to chicken of burn down to run 12 lbs. Just thought of another question. On 10 lbs yesterday I had to chop throttle and hit the brakes. TREES! That caused weird stuff to happened. It was like the engine was dying or had fried. I think it was out of gas. I don't have a BOV, do I need one. Guess I need to change my driving style a little.
Muskrat
snowy1
TY 4 Stroke Guru
the motor dying is due to too much fuel due to excess pressure in the float bowls when you chop the throttle, try lowering your floats and a bov will help but its not 100% cure the higher the boost the worse it gets we have more of a problem with it in the mountains than you guys in the east due to are riding conditions I have been ridiing at 14 lbs. in the mountains and have got it to were its manageable.
Turk
Tech Advisor
When you are on the boost with the turbo spinning at huge rpm,s it feeds the motor when you let of the throttle. It bogs & allmost dies. A local guy is working on a pop off pressure valve to release the excess boost when coming off the throttle hard when the turbo is working.
