I recently had the distinct pleasure of needing to remove a broken exhaust manifold stud from an aluminum cylinder head on my drag racing car, even when using a torque wrench graduated in inch/lbs. As you may well know, there are only 3 types of people in this world. Ones that have not yet broken a stud, those that have already, and those that never will.
Well, congratulations are in order, because I graduated from class 1 into class 2 in a flurry of expletives. I had just completed a porting job on my exhaust manifold, and in the process of bolting it back up, the last stud (always) decided to break on me. Now, this isn’t one of those “easy break” deals, either. The remainder of the stud was recessed with respect to the plane of the head. So, it is with much reluctance, I now had a research project on my hands.
After searching the web for a while, the conclusion I came to is that the “easy way” is to take it to a machine shop. Well, that just isn’t good enough for me. I figured the machine shop might only charge $40 or $60 bucks for it, but then there are all the gaskets to buy and the downtime to deal with and on and on. There has to be a better way.
Well, there is. And I documented it for all of my readers. Here it is.. enjoy!
Crome is a freely available Honda tuning program that, until recently, was extremely popular in Honda tuning circles. It came in both a free version and for pay version called Crome Gold, and is still very popular among hardcore Honda do-it-yourselfers, given that it free and relatively feature rich. One of the features it lacked, however, is Anti-Lag for turbocharged appplications.
Anti-Lag is a way of causing post detonation on purpose in the exhaust system which causes the turbo to spin up, building boost while not causing the engine to be under significant load or risk detonation by sitting on the rev limiter.
While I was browsing http://d-series.org, I discovered one of the users, Speedjunky01, did enough research to come up with a method to induce an anti-lag feature in the Crome tuning application. Here is his procedure:
well seeing as how the two step only builds 1-2psi and just sounds lame off the line, so did some digging over in pgmfi.org
now go to your low cam fuel tables and select the same area of the map as the low ignition tables, hit CTRL + J and adjust fuel by +10-15% (play with it until you hear pop pop pop )
all you have to do is make sure your launch control is set above your vtec activation point.
when you are standing still, the car will run off ONLY the low cam map since vtec speed check is working, so it will retard timing and add fuel off the line creating a true anti-lag. however once moving the ECU will allow vtec to be activated, so you will never hit that area of the map while moving because vtec will activate and switch over to the high cam
Anyway, this feature is exciting, and something I think a lot of boosted honda fans on a budget can appreciate. Despite all the new innovations coming out in for-pay honda engine management, Crome still has a rabbit or two left in the hat.
This video is from the Colorado D-series showdown at Pueblo Motorsports Park in Pueblo Colorado. It is a very high quality video showing the fastest SOHC turbo cars in Colorado. The post production was done by High Altitude Video, which did a really great job. It is easily one of the best drag racing short video compilations I have seen on the web, and it came from someone local! Anyway, enjoy the fast Hondas.