Mike W from CI and John E from Pony Carbs took those matters to the ground.
Just as long as no-one is miss-proporting the figures.
Your concerns are duly noted and entirely valids. I got a PM from Mike W at about this time, remember, he had to front up with an {undisclosed to us all, but he told me, and some others here as well} sum of money for the Australian casting of the first head. He was doing a full scope assessment of intakes, and other options if things didn't quite work out. I told him he'd be fine. 150 odd aluminum heads later, it
was a sound idea.
The DUI/FlameThrower I/II. Duraspark I/II/LoadaMatic thing was done as poolry as the 1bbl to 2 bbl to 4bbl thing. This is not a talk down of Mike W's work, he shepareded it out to toehrs. Both John aE and Mike W were both not well, and that, ladies an gentleman, is the truth becasue neighter is alive to tell the details.
What we do know!
1. The video of the last 480 cfm Autolite 4100
mraley dyno run was with drawn, and indeed, any dyno output showing just the 5250 hp equal to lb-ft reading is invalid, since power and torque on a properly tuned engine should have torque about 1.25 th of the peak hp level....about 4200 rpm, even if the headers and air fuel mixtures are wrong and have swings.
2. You are also aware that MPG Mustang (Richard), who recieved the direct mount head which was tested in the 1-bbl to 2-bbl comparison before 2V 250 head...it had cracks. Such events sow seeds of doubt that are valid.
3. And the details on the ignItion were inconclusive becasue there was no proper baseline testing. Ignition requires simple repeat testing without the second factor of air fuel ratio changes.
Its a nice report though. Looked great. Just not worth the pixels it was written on.
At least we got 235 hp from another source, carry way too many rev's. 235 HP at 6200 RPM, and 228 LB-FT at 4200 RPM. That underscores what You've said, Bill. We discussed the same matters at length then.
http://www.hotrod.com/articles/ccrp-130 ... nline-six/
Even before, there were issues with the Flamethrower I and II's ignition, and the brace of idle quality issues and air fuel ratios.
viewtopic.php?f=1&t=36524&p=266366#p266366
fxp":3eyqgan2 said:
wallaka":3eyqgan2 said:
yappy":3eyqgan2 said:
I'd particularly like to see the gain over points as well as over the alternate electric dizzies verified on a dyno.
Already has been, search for posts by mraley.
Yeah saw that thread wallaka, and it's certainly thought provoking. But the mule wasn't exactly a stock as a rock 170, and the comparisons were all over DII not points if I remember correctly. I don't for a second doubt that the DUI would bring in a few more ponies not to mention smooth out the idle and all the other benefits claimed. I'd just like to know some numbers for a swap more closely resembling my own. I'm about 95% convinced to go this route but the added shipping costs are a bit of a killer for us on this side of the pond, so some data will help seal the deal as it were.
I would assume the HP increase should be more than the measured 8% as there would already have been a gain over points by going to the Duraspark, David's points about the curving of the DII notwithstanding. But does the 170 just not have it in it to realise the gains? Or is it possible that the gains are bigger for the smaller engine (couldn't image why).
Someone else also asked a question I'd like to know - namely if you get the DUI curved for your current set up will you need to recurve when ever you build it up? Like I said my 170 is completely rebuilt but essentially stock (crow 63613 cam the only mod), but I want to add pacemakers and eventually go the offy 3 x 1. Will that change the curve requirements much? If it does then it's probably easier for me to do the other stuff first.
Whatever the numbers a big thanks to Mike for the DUI and all the other cool stuff he's getting together for our engines. Just wondering Mike if you ever thought of getting the offy adapters in stock yourself (or doing a classic inline version)? By the sounds of it they're only a very niche line for Summit/Offenhauser and so stock levels and delivery delays are an issue. I know I'd feel a lot more confident (and hopefully save a bit on post) to be able to make one order from someone for whom the Ford I6 is their bread and butter.
