Project : X-BOMB

You guys are making headers look much easier than they are. Glad to see you back in action on this.

+1 for seeing the build continue, and yes they do make header construction look much easier than it really is!

I can see why you went Nitrous, as it has to be cheaper than a turbo setup for a challenge budget.

Dusterbd13 said:

You guys are making headers look much easier than they are. Glad to see you back in action on this.

Practice makes perfect. My dad has quite a few sets under his belt. I just help weld them.

dherr said:

+1 for seeing the build continue, and yes they do make header construction look much easier than it really is!

I can see why you went Nitrous, as it has to be cheaper than a turbo setup for a challenge budget.

Yeah. Chinese turbo parts have changed a lot though. The issue is finding which Chinese parts actually work, and which don't. That or find used genuine stuff.

I think was the right decision.

Thanks for the words of encouragement.

In reply to TheV8Kid :

Ok I've been as patient as I can. Can you tell us why the speedunio didn't work out?

Stampie said:

In reply to TheV8Kid :

Ok I've been as patient as I can. Can you tell us why the speedunio didn't work out?

So, I guess I should have been more careful with my phrasing. It could have worked out, I just got tired of fooling with it, and gave up. 

Another gentleman on the Speeduino forum got it running on an LS before. I followed his guide to the T, and could not get it to recognize the crank trigger. Bench testing it, I could get it to recognize a signal from my signal generator, but when I hooked it to the car (my Studebaker), I had no such luck. I made sure that I had the appropriate voltages at the right places, and frankly got tired of rewiring my car to try to make it work temporarily, and then failing and having to return it to it's original state so I could drive it again. It is a relatively new open source product. It does not provide error codes like the stock computer does, so tracking down the issue is very difficult. 

I also had issues with getting the digital outputs working. I followed another guide to attempt to trigger the fuel pump with the ECM. I bought the specified chip, wired it in, and it didn't work. I fooled with that for a while and gave up. I'm sure someone else could get it to work, and I might try again someday, but right now I'm in the throw it together and do burnouts mood.

It looked hopeful for a while, but I spent enough time fooling with it with little success, and it didn't make sense budgetwise. For $50 more I could use the Microsquirt I picked up that already had a harness (which needs reworked). For $70 less, I could use a stock computer and have something that is better in most ways and not as good in a couple. So I gave up on it.

Besides the Microsquirt is better documented and has the capability of dry nitrous!

Day 129 - June 5, 2018

Finished tacking passenger side header. Tig welded all primary tubes.

Day 130 - June 8, 2018

Painted tubes. Welded header flanges.

Very nice.

preach said:

Very nice.

Thanks!

I think we're going to bump this up to two updates a week.

Day 131 - June 9, 2018

Started fabricating collector.

In reply to TheV8Kid :

Do you just buy off the shelf header flanges for an LS, or are you making them? I "hear" one can weld LS flanges to a set of BBC headers fairly easily.

How close are you to 'equal ' length on your headers +/-?

DeadSkunk said:

In reply to TheV8Kid :

Do you just buy off the shelf header flanges for an LS, or are you making them? I "hear" one can weld LS flanges to a set of BBC headers fairly easily.

Flea market, second hand sale and one set from Summit garage sale. 

Also, BBC header will not work on an LS. Spacing is different. Ironically, I have seen this done with small block Ford headers. 

759NRNG said:

How close are you to 'equal ' length on your headers +/-?

Longest to shortest, 9/16 of an inch.

Day 132 - June 10, 2018

Fabricated right header collector.

In reply to TheV8Kid :

did i miss it somewhere (1) how you accomplish the diameter increase from merge to exit of collector and (2) why you do this?

as always, thanks for the update.

In reply to AngryCorvair :

1.  Cheap set from Flea market

2.   Flattens/lowers the pressure pulse and lengthens the signal duration.  Read - less velocity change at the merge point.  Exhaust section is sized for the volume (HP).  Merge point is sized for flow velocity.

In reply to wheels777 :

do you cut off the flange and attach them backwards, or do they come with diameter increasing from inlet to outlet?

In reply to AngryCorvair :

It's a reducer cone turned backwards.

wheels777 said:

In reply to AngryCorvair :

It's a reducer cone turned backwards.

Aaah, an embiggener.

Thanks to this thread, I believe I can now make a collector. Appreciated.

wheelsmithy said:

wheels777 said:

In reply to AngryCorvair :

It's a reducer cone turned backwards.

Aaah, an embiggener.

Thanks to this thread, I believe I can now make a collector. Appreciated.

 

I think this thread has changed and/or enabled A number of folks to do things differently and or tasks they would not have done before

wheels777 said:

wheelsmithy said:

wheels777 said:

In reply to AngryCorvair :

It's a reducer cone turned backwards.

Aaah, an embiggener.

Thanks to this thread, I believe I can now make a collector. Appreciated.

 

I think this thread has changed and/or enabled A number of folks to do things differently and or tasks they would not have done before

i hope to someday prove you right!

I'm really sad hearing the news about the challenge. Like a lot of our cars, the primary focus of this car is straight line performance. Don't get me wrong, we have put a little thought into making it turn, but it will never compete with a well prepared Miata. 

That won't stop us. 

Day 133 - June 16, 3018

Laid down some paint.

In reply to TheV8Kid :

It’s just more time to test & tune for 2019, right?