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Search found 246 matches

by j-c-c
Mon May 25, 2020 12:38 pm
Forum: Engine Tech
Topic: Piston oil squirters in NASCAR engines
Replies: 39
Views: 2831

Re: Piston oil squirters in NASCAR engines

I broached this question before, not sure if i got much of a response. If piston cooling is so beneficial, why not incorporate a separately extra cooled, pressurized (?), and plumbed oil delivery circuit just for the squirters? Its main goal is cooling, right? It would likely feed off the central o...
by j-c-c
Thu May 21, 2020 8:28 pm
Forum: Engine Tech
Topic: Piston oil squirters in NASCAR engines
Replies: 39
Views: 2831

Re: Piston oil squirters in NASCAR engines

I broached this question before, not sure if i got much of a response. If piston cooling is so beneficial, why not incorporate a separately extra cooled, pressurized (?), and plumbed oil delivery circuit just for the squirters? Its main goal is cooling, right? It would likely feed off the central oi...
by j-c-c
Thu Apr 16, 2020 6:11 am
Forum: Chassis / Suspension / Body
Topic: How hot is the actual air expelled from center dividers on a brake rotor?
Replies: 11
Views: 555

Re: How hot is the actual air expelled from center dividers on a brake rotor?

But remember, that's not just air, but brake pad material as well. Sure, air itself doesn't have much mass, but the remnants of brake pads do. That might be my idea killer right there. Dealing with 1000F? particles would more problematic then the benefits I likely would receive with my original ide...
by j-c-c
Mon Apr 13, 2020 10:41 am
Forum: Chassis / Suspension / Body
Topic: How hot is the actual air expelled from center dividers on a brake rotor?
Replies: 11
Views: 555

How hot is the actual air expelled from center dividers on a brake rotor?

Not sure this site is a good candidate for an answer for this question, but I'll take a stab at it. We are talking circuit type braking conditions, so feeding cool air with typical materials (Alum, CF, etc) is no problem. I'm toying with, in addition to the typical inlet (albeit slightly smaller if ...
by j-c-c
Fri Apr 10, 2020 1:16 pm
Forum: Chassis / Suspension / Body
Topic: Leaf Spring rear Shackle Length
Replies: 9
Views: 397

Re: Leaf Spring rear Shackle Length

We are on the same page, any outside wheel toe out promotes oversteer? Opposite of my goal. Sanding the springs I had considered. Never hear of anyone doing it. I probably would replace the springs first, if I could get Hyperco to custom arch a new composite set of springs for me. A track bar now, b...
by j-c-c
Fri Apr 10, 2020 10:50 am
Forum: Chassis / Suspension / Body
Topic: Leaf Spring rear Shackle Length
Replies: 9
Views: 397

Re: Leaf Spring rear Shackle Length

Thanks, maybe I wasn't clear enough. The current composite spring has an upward front arch at rest. That promotes oversteer in roll ( toes out). I have lowered the front eye as mentioned, as much as practical. Raising the rear eye achieves the same basic result, but proportionally will be less impro...
by j-c-c
Thu Apr 09, 2020 10:26 am
Forum: Chassis / Suspension / Body
Topic: Leaf Spring rear Shackle Length
Replies: 9
Views: 397

Re: Leaf Spring rear Shackle Length

Main purpose here is to get the front leaf portion closer to level, to negate roll induced oversteer. The current composite spring has at rest too much arch, partly because of weight reduction of the car over time. The front eye is as low currently as possible. Raising the rear eye/shackle would hel...
by j-c-c
Wed Apr 08, 2020 3:17 pm
Forum: Chassis / Suspension / Body
Topic: Leaf Spring rear Shackle Length
Replies: 9
Views: 397

Leaf Spring rear Shackle Length

In the 60's 12"(?) long rear shackles were all the rage on the street inspired by Nascar stockers, mainly for looks/rake. It was a passing fad, and never heard a great deal about any handling performance downsides. My question here is, what are the downsides of using a shorter then OEM shackle to sl...
by j-c-c
Tue Mar 10, 2020 7:34 pm
Forum: Chassis / Suspension / Body
Topic: can a truck stop weigh your car
Replies: 10
Views: 1319

Re: can a truck stop weigh your car

They will give you printed axle and gross weights, if you pull your car onto the scales properly, the scale/axle dividers are visible, at no extra charge.

I am not sure of the weight units, I suspect its in 20lb increments, which is fine if at 70K+ lbs.
by j-c-c
Wed Feb 19, 2020 6:15 pm
Forum: Electric & Hybrid Vehicle ** NEW **
Topic: Freightliner (Daimler) predicts end of diesels in big trucks,,!
Replies: 38
Views: 3419

Re: Freightliner (Daimler) predicts end of diesels in big trucks,,!

BEVs also excel at stop-and-go. The driver not having to clutch and shift his way down I-95 would be a wonderful thing. Every watch a fully-grossed class 8 truck in heavy rush hour traffic? The stress on the frame and running gear every time it pulls from a stop? Electric motors replacing the rear ...
by j-c-c
Tue Feb 04, 2020 9:16 am
Forum: Engine Tech
Topic: Need some help from the forum locating nitriding facility
Replies: 15
Views: 1365

Re: Need some help from the forum locating nitriding facility

Aren't currently, there are two distinct Nitride processes, one being plasma (?), and not often offered by same vendor, and both have their own attributes?

So that should be it seems a decision first made?
by j-c-c
Sun Jan 26, 2020 9:45 pm
Forum: Chassis / Suspension / Body
Topic: New here, Angled 4 link rear end, datsun 200sx, Help
Replies: 5
Views: 416

Re: New here, Angled 4 link rear end, datsun 200sx, Help

The angled 4 link is common, cheap, fairly easy to package, and garbage. The 3 link is the ticket if rules allow. I'm wondering if the GM solid bushing comment is for drag application, not cornering? An angled 4 link MUST have built in compliance somewhere or you soon discover snap oversteer because...
by j-c-c
Fri Dec 13, 2019 1:00 am
Forum: Engine Tech
Topic: Engine oil temps
Replies: 55
Views: 2452

Re: Engine oil temps

So this question makes me wonder, underside piston oilers with the main purpose of cooling the piston, would seem to benefit from lower temp oil, sio why or maybe how common is it to use a separately plumbed off the main supply and then externally Air to oil cooled for the piston spray circuit? The ...
by j-c-c
Sat Sep 07, 2019 10:21 pm
Forum: General Tech
Topic: This can be dangerous
Replies: 14
Views: 1723

Re: This can be dangerous

Okay for the airing up, but what if it decides to go while installing it? But drivers will drive along side feet away, for miles on end, of a fully load 18 wheeler semi, in the heat, doing 70mph, windows open, but not me. Its also my belief often reported "explosions" during a large truck fire, are...
by j-c-c
Tue Sep 03, 2019 5:28 pm
Forum: Engine Tech
Topic: What's the ideal injector trajectory angle?
Replies: 39
Views: 2087

Re: What's the ideal injector trajectory angle?

I just read Dollar Tree (iirc) has to pay $1.2M in restitution in new york state for selling motor oil that "isn't appropriate of any engine manufactured after 1930" I think is what it said. When money is involve people will cheat and lie about anything. But in all fairness, since that is likely le...