We have found this too. Turbo cars at idle - all the heat energy that is required to light off the cat is sucked up by the heat sink we call an exhaust housing...
Turbo cars like it on the dyno - produce a bit more heat - the cat lights off - and works.
I work in importing and legalizing...
Re: Torque Plates?
If they dont have them - then get them to make them. Any competent machine shop should be able to make a set of torque plates.
If you read any of the SA Design books on building motors you will find that they say that you are giving up power and ring sealing if you...
For a performance motor ...always with a torque plate....
I have seen pics of the differences of having a plate installed and not installed. The head bolts and having the heads torqued down actually change the shape of the bore.
I saw a large difference in between running methanol/water , and running straight ethanol in air inlet temps.
The methanol really dropped the intercooler temps dramatically. So much that the intake maifold was cold to the touch after a run.
But the more I think about it now...the methanol...
We had the opposite problem...the gap was too loose and we tightened it up and it got lots better.... Stopped popping and missing.
We went to 50/50 mix , tightened the gaps and upped the boost.... worked to get us into the 11's on pump gas at 2700 feet.
I installed a kit on a Skyline....500 rwhp car...
http://motorex.net/cladding/smc.html
I ran methanol straight first and had some issues. Then went to a 50/50 mix. But the methanol killed the pump. We ended up with denatured later.
You get no improvement from the alcohol alone. You...
I put an SMC kit on a GT-R... allowed us to increase the boost from 19 psi to 26 psi on pump gas.
I think even at the 18-20 psi level it also has the benefit of cooling the intake charge.... ever notice how the car seems to run a little stronger when its cold ? They say 10 deg cooler = 1%...
We used the SMC kit on a GT-R . The methanol provides a noticable hit.... but we left it sitting in the tank and killed the pump . We got another kit and put denatured in it.
Just sitting and watching the air intake temps - I think the methanol works better... We had to crank the...