Last x Days Posts  1 | 3 | 7 Days  Search  Topics  Tree View  Help

Rate this post by selecting a number. 1 is the worst and 5 is the best.

    (Worst)    1    2    3    4    5     (Best)

Author Message
Ben Lipman
Goo Roo
SA
Soarer TT manual, plus TT track car, plus a spare shell

Posts: 4017
Reg: 04-2006

Top of pagePrevious messageNext messageBottom of page Link to this message

Rating: N/A
Votes: 0

Thursday, March 24, 2016 - 09:06 pm, by:  Ben Lipman (Ben12a)

I have done a lot of reading on turbos, and turbo applications over the past few months. I have learnt that 21psi of boost means nothing to conrods etc when the engine is doing 7000rpm. The loads are already stupendous. I will find the passage of text again before I quote it wrong. I have learnt a lot, but forgotten more. I'll need to read the texts again.

The little CT12a turbos were running around 20 - 22 psi for the last three years, so the engine is good for it.

After making 375rwkw, the final dyno run for a graph shows 'only' 367rwkw. No matter, the only numbers that count are recorded at the timing tower.

I need to make a correction above - I am of course referring to the MAP (pressure) sensor not a MAF (flow) sensor. The factory one is maxxed out. Talking to the tuner today they wanted to tune it to 25psi which should have taken into 400rwkw territory.

The general consensus is the stock cams are now a limitation. Head work is a minimum $2000 spend once you buy cams and springs etc. As nice as it would be to keep going, I simply don't have the money to spare right now. A three bar MAP sensor and a couple of other sensors (safeties) are next on the agenda and a retune to take advantage of it will do.

This weekend I hope to corner balance the car and check the alignment. All the paint marks are still true, but I will get the dreaded string lines and camber gauge out again to check.

I am also working on a replacement brake ducting system. The rubber 'scat' tube keeps getting destroyed when the bar goes on and off.

  Administration Administration      Log Out Log Out