Search results for query: *

Hello all, I have become aware of the removal of some elements from motor oils to help reduce emissions. The elements such as zinc and magnanese have seemed to help flat tappet to cam lobe wear in pushrod engines, particularly in high spring pressure racing engines. Does anyone know if it...

I don't think I am too far off in reference to my piston speed data. (stroke x 2 x rpm) /12 gives 5500 fpm for a cup engine with a 3.50 stroke @ 9500 and I have seen them turn tighter than that. For the F1 engine I am not exactly sure what the stroke is but I figured it was around 2.00" which...

I have noticed that with the short stroke of the F1 engines that they are not really running much higher piston speeds than that of a nextel cup engine which seems to be at or around 6000 ft. per minute. This seems to be the limit on most pistons even the 2618 as mentioned with its low silicon...

I see. So how did this affect piston to cylinder wall clearance? I am unfamiliar with the expansion rates of magnesium. Also, what about melting points in relation to aluminum? I guess I am curious overall as to the pros and cons of using magnesium. I do know that when I worked with this...

I saw a show the other day about the inventor of the compressed air powered car. The show stated he worked for a forumla one team for a number of years as an internal engine components engineer. They said he was know for first using magnesium in piston contruction to get piston weight in these...

Hello all, Any thoughts on the ideal booster location inside a venturi on a carburetor with regards to fuel exit hole, booster top or bottom. Basically, what I am trying to figure out is what are the pros and cons of straight leg booster versus a "down leg" where the booster sits lower inside...

I am curious as to what the rod and main bearing clearance is? Based on the components you listed and the intended use I would expect to see between .0025 and .003 on the rods and .003 and .0035 on the mains. If you are significantly looser than this then I could see the pressure falling off...

My question was clearly stated in the first post. Does a self centering digital dial bore gauge exist? None the less. I do appreciate everyone's responses. Part of my issue is the accuracy of the whole thing and second is moral with regards to saving the company money if the head never had to be...

His readings are fairly consistent. However, we did have to replace a head the other day that was slightly out of spec and had only about 3000 miles on it since new. It also passed inspection the first time around. The difference between being able to use the head and replace it was about .0003...

Hello all, The facility that I work at requires valve guide wear to be measured before and after engine testing is performed. One of my co-workers does this procedure and using a digital dial bore gauge with a seperate but wired button to snap shot the reading onto a computer for proper...

It can't be a truck either. To my knowledge they did not come in trucks. 1996-1999 trucks with 5.7L V8's were vortec engines. They had iron heads, standard flow cooling systems, and a distributor mounted in the rear\original location. Good day,

I would imagine based on the work JBond is putting into his project that he plans on running a properly built long block to handle such boost pressures...I hope. For instance a good high expansion/low silicon content 2618 aluminum alloy forged piston, ductile iron top compression ring with...

I currently have the M62 Eaton on my factory supercharged Nissan Frontier. I am disappointed that the unit was not intercooled like the M110 on the Lightning. I am unsure if a sandwich style air to water intercooler is included with the M90 or not (in production models that is). I believe I was...

I do recall some information with regards to noise cancellation on the Honda's. A certain sound or frequency was emitted through the speakers of the radio during multi-displacement modes to combat engine or exhaust noise that was not normally present during all cylinder driving. As far as the...

I read Smokey Unick's 3 book biography when it came out shortly after his death. I seem to recall several paragraphs describing his work with Champion developing new spark plug designs. Just food for thought. Good day,

Sorry Zapster I didn't answer your question... I believe you are correct in saying that Holley uses emulsion bleed as a atomization term. It is interesting that the definition you have states a liquid to another liquid. Good Day,

Zapster, In the Holley, the fuel is pre-emulsified with a small amount of air before going through its final emulsification at the booster. As Pat stated previously as more fuel is required the bowl and main well fuel level drops uncovering more holes in the emulsion tube or equivalent. I...

thanks very much for the helpful responses.

Thanks for your response Charlie. You bring up an interesting point. Have any thoughts on calculating orfice size? Good Day,

I would like to add a comment to make my question a little more clear. All the air for the main circuit pre-emulsion must first travel through a main air bleed (one per barrel) on top of the carb and is then forced to travel through one or all of the pre-emulsion bleeds depending on how you have...