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Search found 595 matches

by ijames
Tue Oct 12, 2021 2:22 pm
Forum: Engine Tech
Topic: Unique Engine – More Power Needed
Replies: 26
Views: 1679

Re: Unique Engine – More Power Needed

Carbureted only. One could accomplish the same IR tuning with a pair of the old 3-bbl Webers, but they're hen's teeth and learning to get them right is a too-long process. How long would the runners have to be to effectively have the same isolation and ram tuning on a plenum as an IR setup? With a ...
by ijames
Mon Aug 23, 2021 10:52 am
Forum: Engine Tech
Topic: 13100 rpm fourbanger restricted to 9300 redline
Replies: 102
Views: 5073

Re: 13100 rpm fourbanger restricted to 9300 redline

Trying to approach this from a different direction, this may not be useful. Either the engines are actually making 10% different power, or the power is being made but is being lost in one of them. Start with #1. You say the AFR is the same so the fueling is the same, but do you have any way to measu...
by ijames
Thu Apr 22, 2021 2:08 pm
Forum: General Tech
Topic: Enclosed trailer fuel efficiency
Replies: 7
Views: 738

Re: Enclosed trailer fuel efficiency

I have learned a lot about improving fuel economy at https://ecomodder.com/forum/ . They have forums ranging from aerodynamics to driving techniques to lots of other stuff. One of the most prolific and helpful posters in the aerodynamics forum (https://ecomodder.com/forum/aerodynamics.html) is "aero...
by ijames
Wed Apr 07, 2021 10:23 am
Forum: General Tech
Topic: cut and sleeve
Replies: 1
Views: 414

Re: cut and sleeve

Don't raise the bridge, lower the water :mrgreen: . If the aluminum is soft enough you could expand the ends of the original tubes a bit. You could test with the piece you cut out, to make sure it won't crack. I used this tool from Amazon: https://www.amazon.com/gp/product/B077RT3D79 picked at rando...
by ijames
Sat Apr 03, 2021 10:01 am
Forum: Chassis / Suspension / Body
Topic: One wheel always locking before the other
Replies: 38
Views: 2026

Re: One wheel always locking before the other

Wild guess: you say new hoses, but how about a partial obstruction in the hard line going to the driver's side caliper? Internal rust, kink, slight crush, bad flare at a fitting ... Anything to unbalance the fluid flow to that side so it always applies just a bit later.
by ijames
Wed Mar 24, 2021 10:24 pm
Forum: Chassis / Suspension / Body
Topic: Fuel Cell dipstick possible safety hazard?
Replies: 11
Views: 809

Re: Fuel Cell dipstick possible safety hazard?

I thought about suggesting a spring as the dipstick, something like a screen door spring just stiff enough to be held horizontally, but then I realized that it would probably be flexing with every lateral move so early wear and always stirring the fuel. I don't know how stiff the material you are co...
by ijames
Wed Mar 24, 2021 11:39 am
Forum: Chassis / Suspension / Body
Topic: Fuel Cell dipstick possible safety hazard?
Replies: 11
Views: 809

Re: Fuel Cell dipstick possible safety hazard?

Can you have the dipstick go in at an angle so if the tank is partially crushed the stick will bend instead of the tip digging in and causing a puncture? Even put a bend or curve in the bottom inch or two of the stick to help it deflect if needed. You could also make the entire stick gently curved a...
by ijames
Mon Mar 22, 2021 9:24 am
Forum: Engine Tech
Topic: TFX Question for Nitro
Replies: 14
Views: 804

Re: TFX Question for Nitro

Could you start with a cap pistol to keep the peak pressure way down for your first tests? The SAMMI maximum chamber pressure spec for .22's, short and long rifle, are just over 20,000 psi. Just from casual observation the nail gun rounds are about the same size as a .22 LR. You won't have a nail or...
by ijames
Wed Jan 20, 2021 10:54 am
Forum: Engine Tech
Topic: SBF Dart block
Replies: 5
Views: 576

Re: SBF Dart block

Dart has the tech info sheets that they send with new blocks on their website. Go to https://dartheads.com/sbf-iron-eagle-blocks/, click on tech sheet, and choose 302 or 351. They don't give gasket part numbers but tell what style stock parts interchange. At the top of the page put your mouse over "...
by ijames
Sat Oct 03, 2020 10:45 am
Forum: Offtopic Forum
Topic: A Rare Piece Of Racing History
Replies: 2
Views: 384

Re: A Rare Piece Of Racing History

Don't tell pdq67 but at 10:30 they mention his fabled two speed rear end ... :mrgreen:. Maybe get in touch with them and see if they have any info.

Oh, at 15:15 they talk some more about the one in this car.
by ijames
Wed Sep 30, 2020 6:29 pm
Forum: Engine Tech
Topic: O ring groove dimension?
Replies: 4
Views: 261

Re: O ring groove dimension?

No direct experience on a blower but a decent amount designing vacuum flanges and low pressure piping. The biggest thing that gets forgotten is that Buna and other rubber orings are deformable but not compressible. That means that the cross-sectional area of the groove has to be at least as big as t...
by ijames
Wed Sep 16, 2020 10:03 am
Forum: General Tech
Topic: What is this tool?
Replies: 11
Views: 1518

Re: What is this tool?

Vargus deburring tool. Cheers. Ding ding ding, we have a winner :D . Go to https://www.mcmaster.com/deburring-tools/changeable-blade-deburring-scrapers/ for pictures of a similar one. The S-shaped tip has a cutting edge and swivels. You place it at about a 45 degree angle to a sharp edge and draw t...
by ijames
Sun Aug 23, 2020 10:44 pm
Forum: Engine Tech
Topic: Single cyl for head development use,,balance problems.
Replies: 21
Views: 1014

Re: Single cyl for head development use,,balance problems.

If you don't mind a 90 degree V8 with a second piston for balance, why not put it 180 degrees away from your test cylinder? That way you have perfect primary balance and only the rocking couple which should be less than the primary residual from a 90 degree V twin. Doesn't each bank of a V8 have two...
by ijames
Thu Aug 06, 2020 11:05 am
Forum: Chassis / Suspension / Body
Topic: Nissan traction bars
Replies: 6
Views: 1180

Re: Nissan traction bars

Casting polyurethane rubber is pretty easy, I've done a little bit making some custom prototype vibration isolators at work. My favorite vendor is www.smooth-on.com. They have a good selection and lots of how-to videos. Vacuum degassing is almost required but they are cheap on ebay or you can rig up...
by ijames
Wed Jul 15, 2020 6:13 pm
Forum: Engine Tech
Topic: Need a machine shop close to northeast Arkansas, any recommendations?
Replies: 4
Views: 330

Re: Need a machine shop close to northeast Arkansas, any recommendations?

I believe that member dwilliams is in NE Arkansas, send him a pm and see if he can recommend someone.