We all know the single turbo set-ups from the original post from: https://www.rx7club.com/forum/showth...threadid=33502

Now it's time to see the proof! I'm not here to doubt you guys, but I or shall I say, we like to see it on paper. Thanks.

Post on...

 

Here is my dyno uncorrected.

http://www.c2turbo.com/photopost/index.pl?photo=247

 

Impressive numbers there Cheuk! 89 octane fuel with the power you made...very good tuning! Anyone else???
Thanks.

 

Here's mine w/ a 60-1 HIFI on a not-so-traditionally ported 13B:

http://bdc.genxracing.com/bdc_033000_3_AFR.jpg

Dyno stopped at ~7600rpm. Should've stayed in it.

B

 

bdc196,

Nice numbers there!!! What fuel did you make that power on a 60-1 hifi? What trim is the turbine wheel?

 

Car: 93 base
Turbo: IHI RX6 (A'PEXi kit)
Boost: 13 psi (15 when I get the boost controller installed)
Manifold: A'PEXi tubular stainless
Wastegate: A'PEXi Racing (??mm)
RWHP: 367RWHP @ 13psi (Dynojet, expect 400 @ 15 psi)
EMS: A'PEXi PowerFC (XS tuned)


My dyno charts are here:
http://www.maxcooper.com/rx7/gallery...-19/index.html

My new setup (not yet on the dyno) will be:
Car: 93 base
Turbo: IHI RX6 (A'PEXi kit)
Boost: 15 psi w/AVC-R
Manifold: A'PEXi tubular stainless
Wastegate: HKS S/S Racing
RWHP: expect 400+ @ 15 psi
EMS: A'PEXi PowerFC (XS tuned)

 

That run equates to 500rwhp on a dyno jet.
Run was made on 22psi and 98octane pump fuel.

 

I was running four 720 injectors at (gulp) 100% duty cycle running a static pressure of 55psig. That was on 93 octane pump fuel, too.

The turbocharger is a 60-1 HIFI with a 0.60 A/R cover, standard TO4B CHRA, and a tangential P-Trim turbine, undivided, 0.96 A/R ratio housing. I was running between 13 and 17psig of boost (WG and boost controller problem at the time).

Dyno cut short at 7600rpm in 3rd gear. I should've gone higher.

B

 

I like the idea of this thread, perhaps a sticky on this would be in order, to go along with the setup thread. I will print some graphs out next time I am at the shop.
I would suggest recommending some guidlines to make the data more comparable. For example try to post graphs that were done in let's say fourth gear, use SAE corrections, and start recording at say 2500 rpm so we can get a better idea on how each trubo setup spools. I would also like to see HP and Torque curves with RPM across the bottom.
This is just a suggestion posting anthing is better than nothing but if possible conssitent data points will make comparisons much easier. Oh and show as many boost levels as you can. I have curves I can show with my car everything the same, one with a T78 and another with a T60-1, at 15 PSI the curves are almost identcal except the T-60 spools about 500RPM sooner, I will try to get these up ASAP.

 

Ok here is a comparison of a T78 and a T60-1, same car, same manifold and everything just different turbos. For some reason I could not get the graph lines to print out but you get the idea. You can see the T60-1 spools a good 500RPM sooner and at this boost level does not have a significant HP difference. Unfortunately these runs were done in third gear so they are down slightly in power. It may also appear that the T78 had a late start but the next post shows the T78 starting at 3K in fourth gear, only the recording was delayed I floored it at 3k on both runs. All runs are straight pump gas and boost is maximum value seen on data log, as you can see the boost droped slightly at higher RPM.

 

T78 in fourth gear, pump gas, 17PSI max

 

Here you see the T60-1 spools to max boost 10PSI a little under 3500RPM and 12PSI just under 4000RPM. These runs were done with a noise reducing 2" restrictor in the exhaust. I lose aproximately 10 and 15 HP respectively at these boost levels. The higher the boost the more power you lose with exhaust restrictions.

 

T60-1 12 & 15PSI with no restrictor.

 

Ok last one, here is the T60-1 running 10PSI with restrictor compared to a sllightly modified stock sequntial FD. As you can see the stock sequntial spools so dam fast, even though it started later it still hit full boost sooner, just look at how fast that torque curve shoots up. From what I remember nonsequntial stock turbos spool much slower, maybe even slower than the T60-1. I don't have a dyno chart from when I was stock nonsequntial, would anyone like to share?

 

Can we get a sticky on this?

 

Eric that last one t60-1 vs sstock wowow!!! the stock turbo was at full boost damn fast. it look like about 400 rpm and it was full boost!!!!

 

Hi Tony,

I know the low end response and spool time of stock sequential turbo is awsome. If only we could make big power with this kind of response. Gee, I could of had a V8, right Jim?

 

There is some really good info here and I would love to see more people contribute to it. So why is it that we cannot get a sticky on this?

 

??

 

Why am I the only one trying to keep this thread alive?

 

I think this should be a sticky its got lots of good charts

 

Probably because not many people, including myself, have anything constructive to add. I totally appreciate the dyno charts you posted. Thank you.

 

Cheuk in Seoul

What mods if you don't mind sharing

 

He's running a Apexi Rx6 turbo with the usually bolt ons. I believe he is still running 1300cc with the haltech tuned by the hitman.

 

How about I just add a section to the photo gallery for dyno sheets? You can upload the images and all the details of the run there. Same result, but no clutter that we get from all the stickies up top.