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Author Topic:   Tips
jammin
Dirt Administrator

Total posts: 3279
posted October 10, 2000 08:39 PM UIN: 16262997
Anyone out there have any small racing tips engine or chassis to help someone out a little........I have one:

I use a brake cylinder hone to clean the inside of my slider tubes....fast, easy and affordable.

Anyone else?

BK19
Dirt Forum Racer

Total posts: 97
posted October 11, 2000 05:09 PM UIN: 40696038
#1;if you use a stock pan in your hobby motor use a stock volume oil pump DO NOT use a high volume it pumps your pan almost dry thus wearing out the lower end of your motor way too fast
#2;if you need to get the top of your right front tire in farther use the exhaust manifolds from a 305 sbc you can really get that tire in then as those manifolds are on top of the plugs not below

AuklandFan
Dirt Full Roller

Total posts: 74
posted October 13, 2000 12:35 PM
I will second BK19's tip on using a stock volume oil pump, but for a different reason. What I found is that if you are running stock type bearing clearances (.0015 - .0025), the pump actually pumps more oil than the motor needs and ends up opening the bypass because the pressure gets too high. So you are wasting quite a bit of horsepower pumping oil right back in the pump inlet.

And with the quality of today's oil, I see no reason to run bearing clearances any wider than what I stated above.

While on this subject, I have a new tip as well. ALWAYS check the rod side clearance in your engine during assembly. I have seen many a cam failure from this being too tight. The oil spuirting out between the rods is the main source of lubrication for your camshaft. Too tight of a clearance and you might puke a cam, to wide and you might overload your rings. Shoot for .015 to .020.

jammin
Dirt Administrator

Total posts: 3279
posted October 14, 2000 11:16 PM UIN: 16262997
I ran a stock pan in my street stock when I first started. I had a 406 in it and ran an extra quart of oil in it so that it would not do what your talking about. I never had a problem with it starving that I saw this way. I wasn't using restrictors in this motor other than roller rockers and I knew that it would throw quite a bit of oil on the top. I ran a 5 quart pan with 6 1/2 quarts of oil in it(and filter). It seemed to work well. I had approximately 25-30 nights on the motor before we took it down...Not much wear at all.

jammin

Pickel
Dirt Freak

Total posts: 239
posted October 15, 2000 10:25 AM UIN: 25419780
I have done the same as Jammin did on my street stock and had no problems eaither..The one thing i did do is move the oil pickup to the right to make sure it got the oil it needed... john

kong
Dirt Roller

Total posts: 23
posted October 16, 2000 12:29 AM
Did you have trouble with the crank foaming the oil up or was the oil level still below the crank as it rotated?

jammin
Dirt Administrator

Total posts: 3279
posted October 16, 2000 07:54 AM UIN: 16262997
I never noticed that it was foaming. It always seemed to look good. I understand what your getting at though.

Pickel
Dirt Freak

Total posts: 239
posted October 16, 2000 09:30 PM UIN: 25419780
I have never noticed any foaming! The motor seemed to run fine.

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