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Twin engine GTP project progress thread

I don't know anything about engine synching but what happened during the burnout? Sounded like one of the engines unspooled about a 1/2 second after the other.
 


darkhorizon said:
On a XP/s1x ish or smaller cam, my pushbutton antilag worked really really well from a stop. I could get full boost on a 6262 from a stop quickly on a 65e and a stock gt converter. Last I checked hptuners doesnt have the ability to do this.
Click to expand...

The 6262 in front makes good boost within 2 secs rear takes more

I tried an antilag tune it doesnt work at super low rpm this converter grabs at 1600rpm


Sent from my iPhone
 
darkhorizon said:
"Antilag tune" is vauge
Click to expand...
Tried timing retard, timing advance. Large and small amounts on both sides.
DIfferent fueling settings (RICH, LEAN IN BETWEEN)

The best setting was stock timing map down low with 12.5 a/f ratio.

But remember I stall at 1600rpm and under 8 psi of boost 2700rpm within 3.5 seconds, that is very low and it acts different than the other motor that stall easily to 3600rpm + under boost in 2 seconds
 
Raised the boost. Manage to get half decent auto shifts on the 4t80e trans.
Big power now... can't wait for this weekend. This video shows a little of what it is like inside the cabin.

 


For those following the progress on this thread... it ran 9 second 1/4 miles three times in a row.
First two runs at 60% throttle in the back. Last run 9.72 @ 139 mph full throttle on both.
Went for a higher boost run on the rear engine and at 20 psi on the launch we hurt the 4t80e trans.
It would have made a very quick pass as I left with more boost off the line plus more boost all the way to the top as well.

Very hot and humid day at the track.

 


penright said:
Great!



Have you had a chance to look at it yet?
How did you hurt it? How bad?
Click to expand...

It still works well, shifts all gears. It just can't get any torque applied. And randomly we lose reverse or drive but it can always move forward by going down to 1st gear position on the shifter. It just slips or pops out of gear when I brake boost on it.
 
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Sent from my iPhone
 


I may have missed it somewhere, i'm curious as to how much this project has ran you, including the cost of the car. If you don't mind. If you'd rather not say that's fine.
 
spazzz said:
I think he pays his guys with that Canadian brewski Eh
Click to expand...
I wish...
It's hard to say how much is in that car. Most of it is time.
I have about 10K in parts total with the car. Most of that money is for the turbo kits that we built (the turbochargers are the most expensive part of the project)
Then the rest is labor. I probably paid over 6K in labor total. My cost for my employees at the shop. And I'm not counting my own time, so 10K total if I pay myself.
If we were to build a replica, it would talk half the time or less. So I would charge 10K to build one but you supply the parts to build and the car.

Total for a customer that car would cost around 20K. 25K for the final details and a 100% turn key car (better suspension than what I have, complete wiring job etc..)
 
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