^^ good to know, thanks!

BW S366 flow = 80lbs/min.

80lbs X 14.471 = 1157.68.

1157.68 / 1.92 = 602 RRWHP!!!

No need for a bigger turbo, the only thing (IMO) that's an issue are your Bosch 1600 injectors
I would look into injector dynamics 2000.

Well the tuner didn't check the boost controller so it was on safety setting to 17 psi he told me the turbo was to small I would have prefered to stay with the s360 knowing what I know now

then which borg warner turbo should i use for 450-500hp at under 20psi?

I made what you made at 18psi with the same turbo.. You can check out my signature for my build..

^^^^^^^^^^^
S366

check JM93rx7 build, you will see his dyno sheet and video, tuned by Alex Lopez

The S366 is a really nice turbo and IMO I see no reason in changing it or the MicroTech. If you plan on staying with the same tuner build around his likes/dislikes, maybe look into running water only not 50/50 it makes things a bit more simple for your tuner just my .02

Going with a different tuner my current tuner is 2 difficult to get a hold of to tune and my new one likes power fc

What tuner are you going with?

If you are going with Rolo at CFT, make sure hes comfortable tunning at the boost levels your looking to run at on pump fuel, not a lot of tuners feel comfortable tunning above 14 psi with pump fuel.

he tunes microtech but perfers power fcs with fd3s

bent superseal fun times

Bent or broken?

bent

are you still running the 550s in your primaries?

you need a set of ALS seals :)

pm if you want some

the S366, according to BW's compressor map makes 79 pounds at 40.5 psi. so it will make your 500 target.

dropping down to 18 psi, 71 pounds per minute are available tops.

so at 71

71 X 14.471 = 1027 CFM/ 1.92 = 535 rotary rw SAE hp is the max target

let's see if you have the fuel to do it...

we will disregard the AI BTUs as they are minimal on the plus side from the meth and are cancelled out from the water.

let's assum you are running 11.3 AFR

71 pounds of air divided by 11.3 AFR = 6.28 pounds of fuel


gasoline weighs 6.35 pounds per gallon.

6.28/6.35 = .989 gallons of gas per minute needed at 71 pounds of air

.989 gallons per minute is 3743 CC/Minute

550 X 2 = 1100
1600 X 2 = 3200

total is 4300 CC/Minute

subtract at least 10% for lag (delivery slippage due to opening/closing)

injectors are rated at wide open, no open/close.........

4300 X . 9 = 3870

injectors overheat malfunction don't work linearly above 85% duty so you need another 17% to not see above 85%

as you can see, after deducting for lag you are still needing to run them wide open which is a losing situation.

my guess is you ran (just) out of fuel deliverability.

howard

"you need a set of ALS seals "

and don't forget larger injector deliverability or you will be buying another set of seals...

hc

wow yeah i spoke to a guy and he says my stock 550 injector arnt gonna do it so im gonna do the 1d 1000s on the low and 1600 on the high and will see what happens...also i was getting some stutter at full throttle with stock spark plugs and then we changed it to 115 on the leading and it went away anyone know the reason why that happens?

yeah it was a cold night so it was at 24psi i think i boost spiked and thats what happen....do you think i can do 500 at 18 with a good tuner also im running bosch 044 pump

yes but going to id 1000s and 1600 on the 2nds

could that have been the problem

you want 10 heat range in all four holes... running to hot a plug retains heat around the plug which makes the area rise and lifts the apex seal off the housing. 10.5s would also work for you.

take a look at your plugs. do they look like they are running hot? what are you doing for premix in your gas?

what ignition? you will need a but more than stock above 400++ hp.

you are running a 1.3 L motor so making 400/500 hp you are generating alot more heat than the typical piston motor.... that's why you need some sort of AI to cool things a bit.

howard

https://www.rx7club.com/build-threads-294/juanmas-s5-tii-gt35r-start-dyno-tuning-983611/

granted that was an FC i built but the REW intake flows more as well as standard streetporting so 500 would be easily achievable at about 17psi on pump gas. the injector combo was 720/1680.

i ran 10.5 in leading and 9's in trailing, the trailings don't need to match the leadings as they don't run quite as hot and the surface discharge plug is superior in these engines so i try to retain them whenever possible. didn't even give me a hiccup at 10:1 AFR while spraying AI full trim with standard FC coils, but it did have a HKS Twin Power to back it up.

max w the turbo at 18 psi is 70 pounds per minute or 525. that is totally maxxed out at around 60/58%efficiency.