Charrlie_S
Well-Known Member
You should look at the photos of slant6racer's car, also. Top quality work. http://www.forabodiesonly.com/mopar/vbpicgallery.php?do=view&g=4802
I think that PISHTA header would work well for anything but an all-out racecar application. And, it looks SO EASY compared with a conventional header, Here'a a picturte of ours, which ended up coating us a cool thosand dollars by the time it was ceramic coated.
:wack:
Hows that bright coating look after being run on a turbo?
you should look at the photos of slant6racer's car, also. Top quality work. http://www.forabodiesonly.com/mopar/vbpicgallery.php?do=view&g=4802
It hasn't changed, appreciably.
To be honest, our car hasn't had much time under boost (that will change, soon) so ours isn't a good example to look at right now.
We hope to get this engine to start making significant boost soon, though, and that may cause some cosmetic changes; we'll see.
I'll keep you apprised of any new developmnts in that area.
Thanks for your interest!
That would be great. Unfortunately, Bright Ceramic doesn't hold up very well in hot side turbo apps. It's unfortunate your coater didn't warn you about that. If its strictly race you may get away with it a bit longer though.
Bill! I cant wait to see what your monster-of-a-slant runs. You should defiantly strap it to a dyno too! ..With video of course.. 8)
Both Tom Wolfe and Ryan Peterson have 233 cubic inch 225 motors that run one 4bbl Holley, turbo-boosted, on gasoline and both make about 500 horsepower.
Can you show me an EFI slant six, running on gasoline that makes significantly more horsepower than that?
Just askin'...:glasses7:
Hey what is the diff between Valiant and a Valiant 100 ?
Bill & Charrlie, Thanks form the kind words. It has taken along time, the offical start of the turbo project was in 2006 when I got my ecu. Finally got the efi on in 2010 and now the turbo. I cant wait to get this combo working. Thanks again.
No but I am basing my opinion on the theoretical advantage of EFI. Two identical motors, the EFI one will make more power, be more reliable and be easier to tune. No jets, no making the carb do things it was never designed to do, just change a few points on a chart and instant power. In addition, an EFI engine making that kind of power could be daily driven, it would be very difficult to set up a blow-through carb engine that would have good off-boost performance.
There is not much difference in max power with efi. More important is computer controlled ignition. That is what make much more difference, locked ignition is something from 80s.
One doesn't exist, you'll have to figure out your own advance curve. But you already have one - a flat 18 degree curve. Use something like Megajolt: EDIS, wasted spark, onboard MAP sensor. You can keep your 18 degrees total advance, just put 18 degrees at the top right side of the table (RPM vs. MAP). A NA slant with reasonable intake/exhaust likes 32-34 degrees total timing, stock timing is 30 degrees, all in by 1500 rpm or less. Most like 10 degrees at idle and for cruise you add in 10 degrees in the high vacuum rows. So there you have the atmospheric line of the timing chart, the cruise and high vac areas, and the high boost line of the timing chart. Then you can smooth it in from there to get a starting point.
If you have access to a load dyno (NOT a dynojet inertial dyno) it's pretty straightforward to set up an ignition map. Use det cans to listen for knock on the dyno, each run you can advance timing a couple of degrees and watch power output. Start out with your boost controller turned way down and creep up the chart. I've always had the luxury of tuning engines with a knock sensor but it can be done without one. EGT is a great timing tuning tool - EGT will increase as timing gets later. Power will also level off before you hit the detonation limit. So if you are at 18 degrees at full boost, and adding 2 degrees shows no power increase, go back to 18 or 19 and leave it there.
Anyway this is way OT, really it's not as hard as you think.
:happy1:
I totally understand. Me, I'm not really interested in drag racing so I tend to think of things in terms of road-rally, which I am into.
That stuff will make you fat... ask me how I know...ops: