Think you'll be ready for NG?
Printable View
Think you'll be ready for NG?
I will be. The car is a question mark still. It is a hopeful possibility though. Spoke with Ray today and he said the pistons will be done soon.
Jeff
It's your exhaust side not supposed to be ported or knife edged? I thought Matt said that causes exhaust reversion. He just lightly gets rid of the casting flaws and polishes it up.
Subbed. Love your car.
The porting was done by IPS years ago along with the oversized valves. I simply knocked the carbon off exposing their work. That is the big difference from DR's head work and IPS's; the cnc machining marks are not removed from IPS.Quote:
Originally Posted by TurboSinceBirth
This doesn't seem to be a terrible thing though as they make good power. Turbo reversion is the only reversion I am concerned with and hopefully the recent changes will help in that department.
Thanks boosted.
More progress made today.
The oil pan is clean finally.
All the valves carbon buildup has been removed. The exhaust valves will require lapping. I'll get that done tomorrow along with head assembly.
All valvetrain parts have been cleaned. I couldn't believe the amount of material that came from the rocker arms. It's been said before and I'll reinforce it again, that shit goes everywhere.
Methanol testing is complete. I'll put up some pictures a little later as the methanol test results are pretty cool. For now I'll say there was a restriction in the 1/4" compression fittings on my setup. That problem will be fixed.
Jeff
Keep that progress coming Jeff!!
Still need lapped but, looking good.
http://i495.photobucket.com/albums/r...ps3a5e6e24.jpg
The methanol tests were done with 3/8" compression feeding the system instead of 1/4" compression. Bottom line on the tub was the system's old flow rate with 1/4" compression feeding it and a best of 1675ml/min. It typically averages 1625ml/min with this arrangement. The middle line was the lowest tested value with just a 3/8" compression feed added to the existing system at a flow rate of 1800ml/min. It averaged out to 1800ml/min over 3 tests with a best of 1850ml/min. The top line was with a 375ml/min nozzle added which bested 1975ml/min and averaged 1960ml/min.
http://i495.photobucket.com/albums/r...ps328591fc.jpg
I think there were variations in the tests because the battery charger that was hooked up was moving the voltage around going from charge mode (~13.2VDC loaded) to maintain mode (~12.5VDC loaded) That's why I ran multiple tests with each setup because there were typically 50-75ml/min differences between tests. It could have also been my start and stop timing but averaging the results got me the answer I was looking for.
I'm going to move the pump to the engine bay and effectively run the setup that produced the middle line on the bucket with 2 nozzles and a 3/8" feeder to the pump. This should give me the boost I was looking for when going >25psi with minimal cost. If it doesn't, I'll add the third nozzle and really bump the flow of the system. The good news is that I found the bottleneck of this sytem and proved a cost effective solution to overcoming it.
Jeff
So what size nozzles are you to be running again?
2 Devil"s Own DO14's. They are rated at 882ml/min at 100psi. The third nozzle was a snow 375ml/min rated at 60psi. I mention the rating psi because it makes a difference when you run 100+psi. The snows will outperform their rating and the Devil's Own will be right on target or slightly above depending on line pressure.
I don't recommend running much more than what I have bench tested with because they aren't seeing boost and the gains are diminishing. I figure the system is near it's limits to maintain good atomization (pump wise). That is the main reason I don't want to jump right into the 3 nozzle setup. If I feel I am still lacking in the methanol department once reassembled, I will add it and give feedback. For now, I'm gonna call it a cheap fix.
Jeff
Nice, I should be more than safe with what my snow 100cc/min x6 will flow then. Would you suggest going with the 3/8" feed with this setup as well?