Nope, I never had a 20B. Just on a 13B.
Still not as good as my stock FD though. Drove that home at 55mph (don't ask why) and damn near got 30mpg. |
Originally Posted by t-von
(Post 12141742)
Curious, how do you have the B, C, & D ground wires wired from those coils? I ask because if those wires are joinded together as a ground, you will have ignition breakup in the upper rpm's. David Hayes just recently had his wiring corrected after a recent dyno session. |
Originally Posted by t-von
(Post 12141744)
You got that kind of freeway MPG with a 20b? What was your cruising timing? I get no where close to this with mine and I cruise at 15.4 A/F with negative split. I get 16MPG hwy.
also t-von, you dont have stock ports, they help alot. |
Originally Posted by Neutron
Honestly not sure. These coils are wired up using a c ludwig harness for the last 4 years. The only issue I have ever had with these coils is trying to run very rich on E85 at higher boost levels. With E85 it wasn't an issue. Leaned it out and ignition issues went away and power went way up.
|
Originally Posted by lastphaseofthis
(Post 12141810)
share you injector pulse width at a specific MPH. lets get some data on this. lets see who has the lowest Inj P/w and they are getting the best MPG. i thought the way to do it was 13.5 afr and as much timing as possible, but i did some research on negative split for cruise and leaning it out as much as possible a while back, havent done it myself yet, working on tuning power right now :)
also t-von, you dont have stock ports, they help alot. |
Originally Posted by DC5Daniel
(Post 12141815)
Chris originally ganged all the grounds together (he was the one who pioneered the use of these coils on a rotary after all), but soon discovered that was not the best way to do it. Ignition breakup at high boost/rpm as everyone else is mentioning. Now power ground goes directly to battery terminals and the others go to rotor housings. Not sure if you have a revised harness or not. It's easy to fix if not.
|
Originally Posted by DC5Daniel
(Post 12141815)
Chris originally ganged all the grounds together (he was the one who pioneered the use of these coils on a rotary after all), but soon discovered that was not the best way to do it. Ignition breakup at high boost/rpm as everyone else is mentioning. Now power ground goes directly to battery terminals and the others go to rotor housings. Not sure if you have a revised harness or not. It's easy to fix if not.
|
Originally Posted by Darryl C
(Post 12141629)
Very nice set up. As the OP mentioned in post 5 what style of exhaust outlet did you go with to match your turbine housing. Turbo spec?
It has a v-band outlet and im running a 4-inch downpipe. |
:icon_tup:
Originally Posted by rx7jocke
(Post 12142034)
The turbo is a bw sxe 366, t4 ar 1.0 exhaust housing but its been modified to an open t4 by the turbo shop....not a cheap mod.
It has a v-band outlet and im running a 4-inch downpipe. |
Originally Posted by Silverfc88
(Post 12138908)
Planning out a 20b project and wanted to see if one of the S300sxe turbos would be a decent match for a 20b? Looking to make around 500-600whp between 15-20psi. I was looking at maybe a s369sxe with T4 .96 open scroll
s360 .88 open on a street port S4 13bt making 475whp @20psi and I want something similar in response to that turbo Bud, I'm running this exact turbo (sxe69) on my street port 20B. At the turbine limit around 17psi... the 1.0 a/r is just too small... I need a bigger rear, but BW don't go bigger in the 300 range. |
You can order a 1.1 300sx turbine housings from full race but that will still be way to small. It also more then double what the other housings cost for some reason.
|
So for the 20b does that mean the SXE 400 series that has up to a 1.25ar available is more suited. Or would it depend on whether your talking stock engine to modded.
|
Originally Posted by stokrx
(Post 12152912)
Bud, I'm running this exact turbo (sxe69) on my street port 20B. At the turbine limit around 17psi... the 1.0 a/r is just too small... I need a bigger rear, but BW don't go bigger in the 300 range.
|
Originally Posted by Darryl C
(Post 12153125)
So for the 20b does that mean the SXE 400 series that has up to a 1.25ar available is more suited. Or would it depend on whether your talking stock engine to modded.
Not sure if a larger one could be made/modded to fit.. _Dave. |
If you step up to an S400, there are different turbine wheels available. 83mm, 87mm, 96mm, & 110mm. You can look those phi charts on Borg Warner's Match-Bot, but here are some quick numbers.
An 83mm with a 1.0A/R flows about 9.4% better than a 80mm S300 with the 1.0A/R An 83mm with a 1.1A/R flows about 13.8% better An 87mm with a 0.9A/R flows about 18.1% better An 83mm with a 1.25A/R flows about 22.5% better An 87mm with a 1.0A/R flows about 26.9% better An 87mm with a 1.1A/R flows about 31.3% better The standard S475 comes with a 96mm 1.32A/R turbine. That monster flows 45.8% more than the 80mm 1.0A/R There are FOURTEEN turbine and housing combinations on the S400. Pick your poison. |
With a stock port 20B what would you expect out of a 1.05AR 9174 T4 Twinscroll with EWG?
|
I think I may go with the S472SX-E with a 1.1 rear. Should make great power at a lower psi and will have room to grow. The response should be decent. Choosing a turbo is a pain in the arse! lol
|
Originally Posted by Silverfc88
(Post 12163456)
I think I may go with the S472SX-E with a 1.1 rear. Should make great power at a lower psi and will have room to grow. The response should be decent. Choosing a turbo is a pain in the arse! lol
|
All times are GMT -5. The time now is 12:25 PM. |
© 2024 MH Sub I, LLC dba Internet Brands