Dyno test soon to follow, EQ Length tubular header

[8valves]

This was all sparked off when I got bored while the Daytona was apart for a new clutch and thought that I could try and have some fun. I made a shorty merge collector out of some scrap pieces and realized I could put it to good use.

My friend Derek and I spent two late nights at the shop, yanked the motor, mocked some junk up and said let's do it!

A big thanks to JT, this header is in generaly similar to the one he made and ran on his G body when it was an 8V car. Obviously they are actually two unique pieces, but the location and general design layout were based on his header.

The car will be re-assembled whenever UPS decides to un-lose my clutch disc and a dyno test will be conducted to see the gains of teh header alone. I have data from our dyno of pre-header, so it should be rather interesting. Anyone want to throw out some guesses for fun? I have mine already.

Enjoy.

[Mopar318]

Looks nice, but not as nice as the viper headers. he he. No pulser on this one huh?

[8valves]

Looks nice, but not as nice as the viper headers. he he. No pulser on this one huh?

Viper headers tend to look pretty neat, since they're so complex. Lots of tubes equal cool looking in my book.

Pulser? As in like a divided tangential setup with paired cylinders? If that's what you mean then no, this is just for the daily beater Daytona. It has an old school MP Plus turbo... just a polished compressor cover and a .63 AR exhaust housing.

My co-worker told me it's a shame to put a stock turbo back on that manifold. I think it will be neat to see the gains on a relatively stock car.

[Mopar318]

Viper headers tend to look pretty neat, since they're so complex. Lots of tubes equal cool looking in my book.

Pulser? As in like a divided tangential setup with paired cylinders? If that's what you mean then no, this is just for the daily beater Daytona. It has an old school MP Plus turbo... just a polished compressor cover and a .63 AR exhaust housing.

My co-worker told me it's a shame to put a stock turbo back on that manifold. I think it will be neat to see the gains on a relatively stock car.

No on the viper headers you posted it looked like you were using the pulser setting on the welder.

[BadAssPerformance]

Looks great Aaron!

Really curious to see how it does... is this a direct a-b swap or were there other mods?

[8valves]

No on the viper headers you posted it looked like you were using the pulser setting on the welder.

Nope. I don't use a pulse function. Actually my welder doesn't even have a pulse setting. The other Synchrowave we have does though, I guess mine was a lighter optioned one.

I've changed my welding style since then. While the nice colored exterior was pretty, and it's held up plenty fine so far, this darker looking weld is fantastically penetrated with a perfect gold bead inside.

Not to mention the Viper headers are done on a slip-fit collector so each tube can be welded seperately very easily. I did this one almost complete, which wasn't fun.

I can do whichever style I please, but between this being where nobody can see it, needing to be very strong, and that both welds will look identical once the car has been ran for an hour or so it doesn't bother me in the least bit. I know this is a stronger welding style, but it may not be neccessary for this application. If it were on an aircraft though, exterior prettiness comes second to quality penetration.

Here's a non-pulse aluminum weld from earlier today.

[8valves]

Looks great Aaron!

Really curious to see how it does... is this a direct a-b swap or were there other mods?

Straight A-B. Only changes will be ambient temp, so I'll have to take that into account. I'll have to do it in the middle of the day so the temps are closer to last time I ran it.

[BadAssPerformance]

Cool deal.

[Directconnection]

My co-worker told me it's a shame to put a stock turbo back on that manifold. I think it will be neat to see the gains on a relatively stock car.

Kudos to you for doing a TRUE A/B comparison when the easy urge to do otherwise is there

[GLHS592]

Will you be making any for public consumption unlike that lazy JT?

[j4278h]

I guess I will be the first to ask.

How much for a duplicate?

[BadAssPerformance]

Will you be making any for public consumption unlike that lazy JT?

I guess I will be the first to ask.

How much for a duplicate?

Lazy JT will be buying a welder and might need to make a batch to fund them... Aaron and I may be in cahoots too... stay tuned

[8valves]

If I did more they wouldn't be 1 3/4" tube like that one is. That's the smallest we use so it's all I had for scrap, but I'm not complaining. I'm working on talking to the boss about a side project deal, perhaps I can get something woked out.

This thing was pretty time consuming though. I'm not going to jig off of it, as I would like to have laid the turbine flange at more of an extreme angle after it is all said and done.

[turbovanman²]

Aaron,

Dude, that header is a work of art, wow.

Anyhow, what did it make before, turbo and how much boost, then I can guess,

[cordes]

This will be the first true A/B dyno comparison I have seen since coming into the world of TMs. I don't think that firsts are something new to you; Aaron, you are the man.

ETA: 20HP at the same boost with no other changes.

[Anonymous_User]

Do you feel your cal was optimized before? Will you be able to tweak the cal for the new header?

[black86glhs]

Aaron, don't worry man, the welds looked great from what I was able to see on my screen. You sound like quite a few of us on here....perfectionist. LOL. I tend to be. I can't wait to see the gains. My guess is it will hit full spool 500-700 RPM sooner.

[8valves]

I don't know how to use multi-quotes so I'll try to answer them all here.

88 Shelby Z
stock longblock with unknown miles
medium sized Spearco FMIC with stock sized intercooler tubing (mostly rubber, ha!)
crushed FPR with a 5th injector
MP STGII PCM
stock 2.25" SV, DP, then up to 3" from K frame back.
MP Plus turbo (stock with a .63 AR exhaust)
Open filter on turbo inlet
Some sort of underdrive pulley

That's all that's done to it. 249 WHP, 290 WTQ at 18 or so psi. Car usually runs 20 on the street.

THAT IS A 3RD gear dyno pull!! The car had toast tires on it when I did it and wasn't too keen on that much MPH. I will re-do the test in third to veryify, then a few in fourth for fun. I did a baseline with the stock intercooler in 4th gear and it made 236 WHP. It ran a best of 14.006 @ 103 on the stock IC, then a 13.81 @ 105.5 with the FMIC. 2.36 60' on some cheap 'ol Kumho's, as driven to the track, no changes.


Simon, I don't know if I would go that far, but thanks for the compliments.

Cordes, hopefully you're in the right ballpark. I think the stock SV is going to be a big problem, and I will have another remedy for that as soon as this test is done. I'll probably make a little externally gated 02 housing with a seperate DP in the next week or so and see how that changes. I'm expecting a lot from that.

Anonymous- who knows! It's a straight up MP cal , STGII. I am 100% maxed out on fuel with the 5th and a very crushed FPR. If it goes as planned I'll need to turn the boost down so I don't run out. Car runs a solid 12.3-12.5 AFR at WOT at anywhere from 18-20 psi.

There will be no cal tweaking. 1) Because I don't have the ability to do so, 2) I'd rather see what it bolts up and does. Just in case I or JT were to make some people would have an idea of what kind of gains to expect.

Bryan- I'm not worried about my welding abilities! If someone wants a pretty bead they can have it all day long. I made this thing in my spare time with scraps of pipe. I'm not going to complain. Everyone has their own methods to welding, right or wrong. All I know is I've never had a header crack yet, even when trapping at 183 MPH on pump fuel, or laying down over 1400 WHP out of a 36X CI street motor.

I agree about the spool! This thing was laggy really, for as little power as it makes. My old S50 setup on my '86 only spooled 500 rpms later. This guy doesn't hit well until 3500 or so rpms! Crazy for how small it is.

[cordes]

That is a really late spool for sure. I am very surprised by that.

To do multiple quotes hit the little plus sign next to the quote button for each person you want to quote then hit reply.

[johnl]

Beautiful, just beautiful. Good job. And, as said, back to back, THAT is great.