For those of you that are looking for a bump box.

Here is my version that uses a $6 solid state relay and a $14 timer the size of a quarter from amazon.

 

I am gonna build one and try it once my car is going.

 

Nice !

 

Thanks Tittan, ordered delay timer today, "who would not want one at this price" built not bought.

 

First of all... major props for what you've accomplished here. I mean no offense by my post, but am curious to see more results.

Can you show us some tests at higher RPM? Were you making much boost in the test you showed or are you able to make boost "at will" so to speak after you final-stage the car? I guess it just doesn't sound like what I'm used to hearing when a car that makes 1000+ HP is bumping in. No doubt your car is "bumping", but I expected a much more aggressive bump from a car that's making your kind of power.

I've tried "budget" bump boxes and they work fine at low RPM without boost, but once I built some RPM and brought the car onto the two step, the "budget" box quickly reminded me of the "you get what you pay for" theory. It either wouldn't bump at all, or it wouldn't release the trans brake when I let go of the brake button. Just bizarre stuff when it worked absolutely fine at low RPM's and little to no boost. I've since gone to a Leash system, and couldn't be happier. The fine tuning you can do on their bump system is great.

Again, I'm not doubting this setup... I'm simply hoping for more results. I just couldn't help but wonder how this budget setup performs when combined with a car that takes a bit of time to build boost and relies a lot on a bump box to help with staging. I have to stage my shitty 5.3 by pre-staging, holding the transbrake, bringing it up onto the 2 step at roughly 4200 RPM and then bump it into the final stage beam on roughly 12 pounds.

I imagine your car doesn't take nearly as much time to make boost as a little 5.3 does with a turbo that's probably over-sized so your technique is probably much different. Can you confirm your method of staging to put my mind at ease a little?

Thanks for sharing.

 

You don't not need a aggressive bump lol... have you ever a true turbo setup that requires retarded staging you can set the bump box to "creep" in or "roll" in. You notice some cars bump stupid hard and some come in soft? This diy box works, is controllable and just different. Peoplemarnt use to setting up a diy option. They want a plug and play setup that doesn't require any thinking..

 

Thanks for the reply, I used the bump box all last year bumping in at 12-14 lbs no issues. The more boost you make the bump will get more aggressive.

IF the bump is getting to rough try ad set the timer faster so it bumps smoother. however the car will move less if your de tuned for the street or a bad track.


My setup is a 5.3 with a china S480 and a LJMS cam and PTC converter ( your standard basic bitch turbo build)
I roll up to the first bulb, hit the trans brake it builds in a few seconds then bump in.

 

You have no comprehension of what that man is asking.

 

 

thats tight. now do a $20 diy transbrake lol

 

On a 4L60E.

 

$20 trans brake will be tough lol

 

bump12345

 

Tittan, completed build of bump box and works great on the bench in the test mode.

 

Killer man! thanks

 

bump 111

 

The DIY box is cool but the Simple Stage bump box, is far easier to adjust and wire up as it was made just for this purpose
Check it out

 

Props for putting up this DIY.

Quick question... On the signal to the two step, is that relay required? Can you instead connect the two step input to the same wire that powers the coil of the SSR enable relay?

 

You could connect the 2 step to the trans brake button if you wanted. Unless you need a ground trigger