elijahcole92

Hello all,

Awhile back i decided to try something different with my 93 Hatch built and use one of the Sound Performance Quick Spool Valves on my turbo Ls-vtec setup in order to increase power under the curve and spoolup. Here's my original thread on HT: https://honda-tech.com/forced-induct...ughts-3205500/

I have a T4 QSV setup on my Supra and love it, so i figured, why not try it on a honda since i couldn't find anyone else using it?

After having to rebuild a junk motor the previous owner built, then finding out my 6262 was blown , i ordered a gtx 3576r from Mac (TheShodan) after much turbo discussion. I dropped the car off with the tuner and finally got the call tonight to come pick it up

The setup is as follows:
1.8l Ls-vtec with CNC werx block guard
B16 Head - Stock ports, supertech retainers, GSC T1 cams
T3 Ramhorn (Dunno brand)
Garrett GTX 3576r .78 DIVIDED T3 housing - From TheShodan
eBay wastegate 11psi spring
eBay/no name 3" Intercooler with 2.5" piping fabbed by me
Full 3" exhaust
ID 1000s, Walbro 255
Custom air filter pipe and box (will get pics)

15psi peak in 3rd on 93 octane pump gas
Tuned on Neptune RTP by Will @ RawPerformance

And here's what you've all been waiting for...







Sadly, the dyno sheet is kinda hard to read. So i marked it to try to make it more clear, but here's a short rundown:
200ft-lbs @ 3850rpm
300ft-lbs @ 4550rpm
350ft-lbs @ 5000rpm

Tuner wasn't excited at all about working with the QSV but he was surprised once the car was finished (I don't know why it has slight dip up top) Car pulls great down low and comes alive from 4k rpm upwards. I think it would pick up more spoolup and have a better boost threshold if i had a better boost controller/solenoid, as TheShodan advised me. (It's a Mac valve)

The car definitely has more in it (9 degrees of timing up top), but since the motor only has 100~ miles on it, we're going to wait a little to turn it up.

$MIKE$

iTrader: (13)

Definitely an impressive curve down low.
Don't see why you would put an ebay wastegate on a 2k$ turbo

elijahcole92

Thanks! In the future i hope to switch it out. The turbo setup on was on the car when i got it, minus the new turbo (had a 6262) and the intake setup.

Originally bought the car to tune it and flip it before i found out the motor was bad 40 miles later and now i'm stuck with it hahah

$MIKE$

iTrader: (13)

Yea I can't wait to try out those gsc cams.

riceball777

You have divided housing turbo on a undivided housing turbo manifold?

wantboost

iTrader: (2)

The dip is probably from the valve opening...

With the valve closed pre-turbine backpressure has to be sky high. When the valve opens the backpressure decreases very rapidly which can cause a momentary dip in power, most likely from turbo shaft speed slowing down for a small period of time.

elijahcole92

That's what i originally thought, but the valve is open way before 7.5k rpm, as it begins to open at 8psi and is fully open by 10psi.

wantboost

iTrader: (2)

Check the logs, something had to happen to cause the dip. Either a dip in boost pressure or some ignition timing anomaly

Muckman

iTrader: (2)

Thank you posting these results. Do you have a datalog that shows the manifold pressure? Id love to see at what rpm you start building boost vs peak pressure vs redline pressure.

dcmatt

iTrader: (7)

For anyone that doesnt know. Will from RAW performance is also ricky taylors tuner. You guys might remember the 875whp (?somewhere around there) non vtec CSS build posted a few months ago.

elijahcole92

I'll talk to my tuner and see if i can get one, i'd like to see it too

Tony the Tiger

The results look great regardless, especially to get a GT35 turbine spooling up so soon. Even though on the dyno doesn't quite equal to streets in terms of response and how quickly the car picks up, it is sill impressive to be able to do this on a dyno run.

If there is a video of your dyno run, it really shows how the turbo flashes up into power

m4xwellmurd3r

Not sure what happened...blame my pocket for this post

elijahcole92

Talked to my tuner, sadly he didn't keep them. But i should have some in a few weeks as i plan on going back and turning it up.. a little I actually found one of my couplers coming off at the intercooler, after fixing it, it may be spooling a little sooner!

@Tony, thanks! Mean's alot coming from a guy who's seen it all haha. I wasn't there, but i'll be sure to get a video this next go round. Hoping to get a log on the street too, so we can compare.

HiProfile

Compared to a different GT30 vs GT35 test, this spools up a LOT faster than it should. I'd say the quick spool valve is working very well. I think the dip is more related to the cams, a lot of d-series cams do the same thing. It could also be something happening with drive pressure. The .78AR housing ends up working like a smaller housing because of the divider in there.

300wtq at 6300 rpm:
https://honda-tech.com/forced-induct...chart-1923514/

300wtq at 5400rpm:
evans tuning forums :: View topic - Dyno comparison: GT30r vs GT35r

met

I bet that dip could be dialed out with cam gears, playing with the timing on them. After having mine apart for getting freshened up. I noticed a drop right there, I spent hours looking at dyno charts and calling people reading all I could. A lot of Honda engines do that, in the end on the dyno we played with the cams and that leveled out. It some sort of reversion at just over 7k. Just surprised once you know what to look for how common it is and no one notices.

elijahcole92

Tossing it on the dyno saturday to play with the cam gears and the new boost solenoid from TheShodan.

Cole D

Nice, in for the results

rawperformance1

I'll wait for Cole to post the results, but I will say I wasn't a believer in the QSV at all before all of this. We turned it up to 19.5-20psi and the damn thing made 450wtq at 5400... I couldn't believe it. Moving the gears did help with the dip, and to save face I only had them advanced in order to get ignition timing a little since the distributor at full advance only netted me 14* base timing. Set the cams to zero and didn't care about base timing and the results were pretty good to say the least. Performs better than a 30r, makes power like a GTX 35 should. Really happy with this build.

wantboost

iTrader: (2)

the crazy thing is it's only a 1.8l.... that graph doesn't read like your typical 1.8l turbo honda lol

met

That's awesome man! Makes me wish I knew about this a few years ago. haha

rawperformance1

This was the 20psi pull, still on 93 octane chump gas. I put a little timing in it, just to put up a good number. It leaned out up top, the 1000cc injectors hit 102% duty this pull... Oops. Didn't expect the power to jump 50hp with 2psi extra. Guess that shows what efficiency range means. Haha.. Ended up pulling a couple degrees out and leaving it rich around 11.2afr. The engine didn't like anything leaner than that which can somewhat be seen in this graph where the power sort of leans over around 7krpm.

phaphon

nice. so for someone looking to make more power up to would the qsp not be a good idea?

rawperformance1

It shouldn't have any major effect on top end power, in theory. Once it's open the turbo/manifold acts the same as it normally would.

elijahcole92

Yes! Car is running great, i'll try to get the dyno graph where we left the car up tonight. We actually lost some top end power by moving the cams back to 0, but it removed the dip and made the curve smoother so we left it.