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We have been super busy, but I finally forced myself to build a 4" downpipe, results were good. Picked up 68 rwhp and 37 tq. and the boost comes on a lot quicker.
Still having a problem with the boost not maintaining to redline. It reaches 20psi then bleeds down to 16-17psi @ 8k rpm, I guess I will try a larger FMIC next.
She just laid down 683 rwhp/506 tq @ 20psi max. If I can figure out the boost drop it should be well into the 700's and the torque will be flat.
Comparison 3" to 4" downpipe same 20psi max with bleed down to 16-17psi
Amazing, but I'm just curious. Why is it taking until 5,000 RPM on a 20b to see full boost? I know it's a massive turbo but I guess I thought the 20b flowed significantly more than the 13b so boost would come on earlier? How would it compare to a 13b running the same turbo and setup in terms of spool times? Would the 13b not see full boost until like 6000 RPMs?
I'm probably reading the graph wrong but I'm just trying to learn.
Another positive side effect was that the EGT's dropped considerably. I was happy to see the HP gain, not happy to see the initial problem still exists. No reason to turn the boost any further until I get the bleed off sorted.
If you look at the chart there is positive pressure already at 3K rpm. This is a 4th gear pull starting at 2K rpm, lower gears the boost comes on quicker.
According to this dynojet run file pic for a gt42 on a 13b, it looks like 6200 for 20psi on a 13B. It hit 29psi at 7k and it is making 10psi at 5500
Last edited by Banzai-Racing; 10-09-17 at 03:48 PM.
Decided to finally upgrade from the 6 stock FD trailing ignition coils. Made some custom brackets and will be making custom plug wires. Used the AEM HO "dumb" coils since I already had the X6 igniter and the 6 channel HKS Twin Power. Looking forward to testing the setup, the 30-2852 Coils actually have higher output than the Smart coils. . Ignition Coils 93+ RX-7
Damn dude, this FD rocks the house. I'm seriously impressed. I'm sure you've mentioned it here..... what trans and diff are standing up to this level of power/torque?
Damn dude, this FD rocks the house. I'm seriously impressed. I'm sure you've mentioned it here..... what trans and diff are standing up to this level of power/torque?
I also just received the custom Garrett Intercooler that I will be installing, hoping it flows a little better than the current one. Going to run the ignition setup on the dyno first to see if there is any difference.
It is really great to see the you keep finding new was to improve and refine your car. Most people would have stopped years ago and been happy with a great car but great is not going to cut it with you. Your drive to always better your craft is impressive and maybe border line crazy. Looking forward to seeing that dyno sheet.
It is really great to see the you keep finding new was to improve and refine your car. Most people would have stopped years ago and been happy with a great car but great is not going to cut it with you. Your drive to always better your craft is impressive and maybe border line crazy. Looking forward to seeing that dyno sheet.
It is all R&D so that I can make your car better
Originally Posted by Copeland
I used to say the same thing, the broken parts trail started right around your current power level.
OK. I have been running at this power level for over a year, this is my low boost setting, so it is never below this power. I actually have higher boost runs of over 750rwhp, but that is just the peak with a huge drop off. Need to sort out the 20psi setting then move on to working on high boost. Just lucky I suppose.
OK. I have been running at this power level for over a year, this is my low boost setting, so it is never below this power. I actually have higher boost runs of over 750rwhp, but that is just the peak with a huge drop off. Need to sort out the 20psi setting then move on to working on high boost. Just lucky I suppose.
Probably just how you drive mixed with a little luck. Keep it up, car looks great.
I did a quick pull on the dyno, car made the same power as it did with 6 used OEM trailing coils. It seems to start a little easier but that might just be wishful thinking or the 8.5mm MSD low resistance plug wires that I made to replace the 10mm Magnecor wires. I was really hoping to see some sort of gain, but at least it tells me that the HKS Twin Power was doing a great job firing those old coils.
Hey man! hope all is well. What size wheels are on that GT42 turbo? just curious. Do you log exhaust back pressure? great to see the infamous car still running strong
03-17-16, 06:08 PM
Looking forward to seeing that dyno sheet.
