Search found 5709 matches

by John_Heard
Wed Jul 17, 2019 2:02 pm
Forum: Chassis and Suspension
Topic: Ladder bar car with bounce in the car
Replies: 3
Views: 29

Re: Ladder bar car with bounce in the car

Do you mean they are so light they might be stacking and hurting travel? Yeah that could certainly be a problem if that's going on. However, again unless you hit a sizable bump, a ladder bar car should only be extending the shock from at rest, at least till you lift when it relaxes.
by John_Heard
Wed Jul 17, 2019 8:19 am
Forum: Chassis and Suspension
Topic: Ladder bar car with bounce in the car
Replies: 3
Views: 29

Re: Ladder bar car with bounce in the car

Bouncing is often something bound up in the rear suspension or shocks too tight. Might start with unhooking the shocks on one end and bouncing the rear of the car, does it move freely? Then set shocks on loose setting, can you move them by hand is one or both really tough to move? Full loose you sho...
by John_Heard
Tue Mar 26, 2019 8:57 am
Forum: General BS
Topic: KNOCK....KNOCK.....
Replies: 4
Views: 863

Re: KNOCK....KNOCK.....

Life has a way of getting in the road of playing with race cars for sure.
by John_Heard
Tue Dec 18, 2018 7:47 am
Forum: General BS
Topic: Merry Christmas
Replies: 11
Views: 2840

Re: Merry Christmas

Merry Christmas fellas, hope you all get a nice stash of car parts from Santa :-)

John
by John_Heard
Fri Aug 24, 2018 2:08 pm
Forum: Chassis and Suspension
Topic: Tuning triangulated 4 link
Replies: 1
Views: 520

Re: Tuning triangulated 4 link

I wouldn't rush right out and start changing 4 link geometry. Just because you can doesn't mean you should. 1st off QA1 shocks aren't the best performing shocks in the world. In fact a great deal could be due to your front suspension setup. I'd first suggest filming the car launching with high quali...
by John_Heard
Tue Aug 07, 2018 8:36 am
Forum: General BS
Topic: Small tire vs Big tire
Replies: 58
Views: 94665

Re: Small tire vs Big tire

Really? Well I suppose you should do some measuring to see how much room you have huh? I'm sure you're aware by going big tire you'll not fit in with same type of car you have. Course if you're just test n' tuning it ain't no big deal.
by John_Heard
Wed Jul 25, 2018 11:15 pm
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

I like the sound of what you're thinking about now much better, those numbers should make a big difference. Seems that top link on the rear end ought to be higher though.
by John_Heard
Wed Jul 25, 2018 8:24 am
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

Where did you have it at previously?

Is that top hole rear hole really right above/on the axle tube?
by John_Heard
Tue Jul 24, 2018 2:03 pm
Forum: General BS
Topic: KNOCK....KNOCK.....
Replies: 4
Views: 863

Re: KNOCK....KNOCK.....

It's not been running since end of March, we burnt the engine up bad at Tulsa's Radial Revenge Race. Been building an all new bullet for it, hope to have it done in a few more weeks - https://www.johnheard.com/something-wic ... way-comes/
by John_Heard
Mon Jul 23, 2018 12:47 pm
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

I have a leaf spring car, so yeah I don't play much with 4 links either haha.

Yeah I think you want to be in the 100% anti-squat or more, and your car doesn't appear to be extending the shocks so that might be something to work on.
by John_Heard
Mon Jul 23, 2018 7:25 am
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

Video was the old one you put up.

I think I'd work on fixing the shock travel issue first before thinking about changing springs. The springs aren't so soft they are stacking up / binding are they?

If the suspension isn't extending during the run maybe you don't have enough anti-squat in it.
by John_Heard
Tue Jul 17, 2018 11:05 pm
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

Glad you found something. With the wheelie bars off were you able to make the suspension move with shocks loose?
by John_Heard
Tue Jul 17, 2018 8:57 am
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

I don't know if that's too much spring or not. Try adjusting the shocks like I suggested and see if you can move the car. If you can't, and those shocks are new, it sounds like something is bound up.
by John_Heard
Tue Jul 17, 2018 8:11 am
Forum: Chassis and Suspension
Topic: Porpoising on launch help
Replies: 18
Views: 1463

Re: Porpoising on launch help

First thing, set the rear shocks to full loose on both extension and compression. Can you push down on the rear of the car and make them move easily? You should be able to pull up on the car as well and see them move a bit. If you can't, there's a problem with the shocks that needs addressed. You sa...