And where would the trans cooler hook into the system?
It would just be an inline cooler that runs to the front. We will post details shortly, but in the meantime, Vit has posted some 87 octane numbers with our catless Race downpipe / front pipe combo on his 6MT car!
Vit Tuned Results
"...When I tuned the car stock on 87 octane bone stock, I targetted 18.4psi and the boost level stayed very close to target boost. To try and give us 1:1 results at the same boost level, I actually had to target 17.5psi to get the same boost level I had before installing the downpipe. You can see this in the side by side comparison in the image to the left. I forgot to get this dyno comparison off the dyno computer before I left the shop, but keeping boost the same we saw 8-9whp on the top end and 10-20wtq gained. Keep in mind this is over our “stock tuned” 87 octane test — so we’d already worked on the timing map and fueling a bit as well. You’ll also note as we put load on the car before starting the pull — the turbo was already making almost 2psi more than before the downpipe — this will come into play later.
What does this mean to YOU? If you’re running the same tune with a freer flowing downpipe you will artificially increase the boost level a bit...
The PRL items, as always, are quality pieces. Very well done items and fitment on our car was like a glove. No rattles, no rubbing. If you don’t have a lift the install will be a bit more entertaining. On my lift it took about 2 hours to get the stock items off and this one installed. The studs in the turbo can be interesting — PRL broke theirs. I managed to get mine off without any breakage or stripping with the use of some magic lube.
So What About The Toon?
Note: blue is HP, yellow is TORQUE, orange is BOOST.
So let’s try to give it a bit more boost and see what happens? Increased the boost level about 1psi (don’t want to go crazy with 87 octane) after adjusting the timing map and such — and the results were nice. 20whp and 30-32wtq gained.
Torque came in sooner too, right? Of course — if we didn’t have the “ramp” based boost control it would of come in even sooner, but we got maybe a 200-300 rpm improvement because the turbo just wants to GOOOO with the free flowing downpipe, even if the ecu doesn’t want to let it! Peak torque however — was still the same spot. This should never really change as long as the load & ramp rate of the pull is consistent (not all dynos can control this — and certainly load will vary on the street).
But hey, let’s try to give it a little bit more. In the dashed line we increased boost a bit more (with a few other changes), and as you can see the gains were marginal — a bit more torque, but top end HP actually suffered a bit. We’re now at the limits of the fuel and I was starting to see the knock limit approaching very rapidly — don’t want to run here long term at all for reliability’s sake. But hey, overall we still saw 5-8wtq more which amounted to 35-40wtq through the mid range and we still picked up 20wtq up top.
...Expect to see diminishing returns in how much HP you can make with better fuel — on 93 expect maybe 8-10whp more with this downpipe. Of course more torque as well...
Vs Bone Stone?
Don’t really need an explanation I think?
87 octane fuel." - Vit
Gains:
35-40wtq and 20whp over our car tuned bone stock on 87 octane with a 6MT Civic
Also, we've been working on finishing up our intake system for the 1.5T platform, more details to come soon when we have our finalized design. In the meantime, we'll post updates on our other intake system pieces...
Honda's corrugated factory intake piece contains flow-obstructing ridges and transitions that sacrifice power. Our stock replacement intake hose removes these obstructions and replaces them with a smooth, tapered transition. We still plan on releasing a full intake system, but designed this hose for customers not looking to get too carried away with mods, looking to add a big of bling to their engine bay or just as a stock replacement in the future if the factory unit were to need replaced.
We are finishing up development with our prototype drop-in filter replacement as well, stay tuned for more pictures and data to come. This filter will flow much better than the OEM Honda filter and will work perfectly with our intake hose!