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Old 12-28-18, 05:25 PM
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Help!!

Help!!
I have Fd engine, street port , powerseal ,cosmo intake, Haltech re ecu 44 tial wastegate 50mm blowoff greddy. 4 injector 2 850cc and 2 1200cc, treadstone intercooler Ready for boost
info best turbo for my set up
this is the goal
400 to 450 rwhp
91 pump
18psi
borg warner 364sxe??
.88 turbing housing

advice??
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Old 12-28-18, 05:58 PM
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S362sxe 76mm turbine .91


(8376 from dropdown)

S300sxe
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Old 12-28-18, 07:38 PM
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The S362SXE (0.91) has worked great for me over the past few years. You can't beat the price or sound of the BW.

You may need a bit more injector to make 450 rwhp.

Looking at some old logs on 93 octane, I was using ~2,250 cc/min of injector running 19 psi on the S362SXE at 8,000 RPMs and that was WITH additional methanol injection and 11.4:1 A/F. You may get there with some additional base fuel pressure, but it should be close

Last edited by strokercharged95gt; 12-28-18 at 07:42 PM.
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Old 12-31-18, 01:11 PM
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thanks for your help

what is the difference of 364.5 and 362? with 450rwhp?
spool?
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Old 12-31-18, 05:22 PM
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Originally Posted by Gamaliel31 View Post
what is the difference of 364.5 and 362? with 450rwhp?
spool?
About 200rpms difference in "spool" up time.

S362 is will make 550rwhp easy, so zero need for bigger for you.
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Old 01-01-19, 10:56 AM
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i agree w Turblown and others here that the SXE62 would be an excellent value choice for 400/550. i tested the .91 V the 1.0 back to back and was surprised to find not much difference between the two. the .91 made
good power with my race ports at 8850. i did find about a 40 F EGT advantage with the 1.0 and slightly less EMP/EMAP. i made 488 rwhp at 20.4 psi and was a bit on the rich side.

as to injectors: you have 4100 CC at 100% duty cycle., 3485 at 85% (max you should run). using actual lag figures from my EV14 injectors i see between .26 and .20 flow reduction so let'us use 25% to be conservative...,

3485 X .75 = 2614 CC NET into the engine after 25% reduction for lag.
2614 is .69 gallons per minute or 4.38 pounds of gasoline.
at 11.3 AFR that would be 49.5 pounds of air and 373 rotary rwhp
at 10.5 AFR it would be 346.

my injector sizing for 450:
in order to run to 10.0 AFR with 25% lag at 43.5 psi at 85% duty cycle 5581 Gross injector capacity

it is essential to run AI with gasoline as base fuel. i run 100% meth thru a M15 nozzle at 130 psi.

you may run straight water if you wish, somewhere around 500 CC.

water slightly reduces power.
Gas has 116,090 BTUs per gallon
water has 8087 of negative BTUs
8087/116,090 = 7%

at 450 rw rotary hp you will be using 3558 cc of base fuel NET into the motor at 10.5 AFR
500/3558 = 14%. so water will negate 7% of 14% of your power or 1%... no biggie as long as the delivery
has a curve similar to the base fuel..

you may or may not have an issue with boost creep as you will be bypassing a lot of excess flow around the 400 area.

good luck
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Old 01-01-19, 03:10 PM
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Thanks and happy new year

I forgot to mention that my engine is in an rx8. the turbo 362 works here too ??
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Old 01-02-19, 08:42 AM
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the SXE comp cover is a hair larger diameter, i measured it but don't have the number in front of me...other than that i see no reason
it wouldn't fit V other turbos..
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Old 01-02-19, 10:29 AM
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My engine, but I do not like the spool.
Turbo 66/84comp, turbine 64/74 ar.84.
perfect after 6,000rpm but spool slow. I understand that the turbo s362 fits without problems. But my question is. Would s362 be perfect for my setup? 450hp 91pump or 93pump
conservative. daily use.
I have some things different from an rx7 and that are against me.
1. R3 6speed transmisión.
2. 477 diferencial I'm about to change it to 444.
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Old 01-03-19, 09:16 AM
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you can easily do 450 on pumpgas with no knock assuming a proper tune/setup etc. i see no mention of AI which is essential. water works fine at 450.
i highly recommend the SXE62 w a 91 or 1 backend although it may not be the turbo that is causing your spool issue. while you supplied wheel sizes i am not
totally sure i was able to I D it. it is close to a Garrett GTW yet i haven't seen Garrett use anti surge reliefs as in your pic. using your numbers i have a comp
wheel at 6.92 aver sq inches and a hotside at 5.82. the comp wheel has a 61 Trim which favors top end V mid range. the SXE is 54 Trim favoring mid range.

before we get into other factors such as tune etc etc... pls LMK exactly what turbo you have...

Last edited by Howard Coleman CPR; 01-03-19 at 06:50 PM.
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Old 01-04-19, 06:38 PM
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Thanks for the help. we keep learning.










I have 3” stainlessteel exhaust pipe. Turbo to intercooler pipe 2.5, intercooler to engine 3”pipe. Treadstone intercooler 8x24x3.5 500hp. Intercooler temperature 85 to 95f. Coolant temperature 170 to 175f daily drive, on boost 170f to 180f. step by step I'm improving my set up. 400rwhp in the old dyno that I use are 430 maybe more in a modern dyno. some pictures of what I have any advice let’s me know thanks.
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Old 01-04-19, 06:57 PM
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mostly looks O K. you might be looking at boost creep at lower boost levels w one smallish WG. can you I D the turbo? also where's the AI? ports look O K.
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Old 01-05-19, 12:46 AM
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Ai?

ai??
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Old 01-05-19, 11:12 AM
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AI is short for Auxiliary Injection.

i suggest you read pages 172 to 186 from my Google Drive document... FD Knowledge Resource/ Auxiliary Injection

https://docs.google.com/document/d/1...dpatiR-rk/edit

you might also refer to my thread "Making the case for the rotary powered FD: The Fix" 122,000 reads. somewhat dated but good background
https://www.rx7club.com/3rd-generati...fd-fix-806104/

AI is essential.

Last edited by Howard Coleman CPR; 01-06-19 at 09:59 AM.
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Old 01-05-19, 11:42 AM
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thanks ok.

My fuel pump aem 044 style with aeromotive regulator. I have two 850cc primary that work up to 4psi boost and then 2 more 1200cc. My mechanic says that the injectors arrive at a maximum of 430rwhp. He is well known in Puerto Rico and respected. He makes 13b from 500 to 700rwhp. but never use Borgwarner turbo. he told me to investigate what borgwarner turbo is better for those girl rwhp ponny. Jajajajaa

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