D-Rob

Consider this a continuation of my last RDX thread: https://honda-tech.com/forced-induct...-dyno-3255584/

I'd like to share some more recent RDX work we have had a hand in.

First, let's revisit my good friend Caleb's car. The car went back to the track a few weeks ago, and managed to click off a few 13.5X's @ 100+mph with strictly the mods listed at the end of the last thread. (Car #108)


With the 100+mph barrier reached with the stock downpipe/exhaust, and the 3" MAF housing all-but reaching it's limit (4.84v, and a code is triggered at 4.95v), it was time for upgrade.

The stock downpipe (cat #1) and midpipe (cat #2) were both removed and replaced with a custom 3" stainless steel downpipe made in-house, along with a light-weight 3" aluminum midpipe connecting to the stock muffler, in an attempt to keep noise to a dull roar.

The 3" intake we fabricated was replaced with a 3.5" unit.



After a MAF rescale and some fine tuning, the results were 365wtq / 282whp @ 17psi dropping to 13psi on E70 fuel. What we thought was exhaust restriction limiting boost pressure before appears now to be more turbocharger-limited; the boost pressure simply will not hold steady as engine speed rises. Below is a comparison of stock exhaust parts and E85 versus new parts and E70 at an identical boost curve.



The median gains were 23-26whp pretty much everywhere over the stock parts, with the MAF voltage now settled around 4.4v.

The car is headed to the track one last time this weekend, with what we hope will bring a 13.2-13.3 @ 102ish.

And now...

Bigger Turbocharger Stuff

Soon after posting my results with Caleb's stock turbo car, another gentleman contacted me regarding retuning his RDX that had received an upgraded "20T" unit from Blouch Performance Turbo here in central PA. He wasn't quite sure on the specs of the turbocharger, but he mentioned it had a billet compressor wheel.

This car came in with the 20T turbo, 3" downpipe/exhaust, bigger injectors/pump, 3.5" intake he fabricated, and the stock intercooler.

This car had no problem making 18psi up top, and power carries much better than the stock turbo because of this. The car was using 93 octane strictly for fueling, and is hindered by the small stock intercooler. The client is now assembling a FMIC setup and RBC intake manifold swap.

340wtq / 313whp @ 18psi on 93oct



He made his way to the track also, and clicked off a 13.52? @ 105mph, although I do not have a photo of the slip.

I really want someone to slide a set of A2 cams and a tubular manifold with a GT3076R on one of these. Any takers?

ls joker

man i would love to see some action of these or even a ride.

Tony the Tiger

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LightningTeg

Im sure the cams are holding them back now like you said. Good stuff.

turbohatch96y7

iTrader: (15)

That tq tho

turbociv910

Should have known it was to small to hold boost with higher rpms.. that teeny turbo

Thanks for posting.

Bently_Coop

Very nice, bet that is a fun sleeper car to cruise around in.

wantboost

iTrader: (2)

Still good power for an automatic

SalvadorSZ

Looks great, any track vids?

D-Rob

Here's an update on the red RDX.

We took it to the track one last time this season on Saturday, and tossed on a set of 26" Hoosier QTP's after finding that the car just wanted to annihilate 1st gear on the street tires after the last round of modifications.

The result was 13.2 @ 102mph, making this what we believe to be the quickest RDX in the country (perhaps even the world)?

Runs were done with full interior, with just the spare tire and jack removed.

Here's a video.

Thanks!

turbohatch96y7

iTrader: (15)

Lol that car looks so out of place

Sleeper of all sleepers

ls joker

sweet

gutted-dx

iTrader: (1)

I wonder how it would do in autocross? How does it handle with all that power?

bcintron95

This is awesome. Lol

wantboost

iTrader: (2)

A 1.8 60ft is impressive for a car that heavy.

Have you thought about modifying or shimming the hydrostatic pump in the rear diff to get it to lay down power sooner? Typically the rear doesn't actually start tranferring power to the diff at a dead stop.

SalvadorSZ

I'm a fan of it, love the sleeper look of the TBSS/Cherokee and now this

wantboost

iTrader: (2)

Honestly the only thing cosmetically about the car I can't get used to are the headlights.

To me it almost looks like they are too small or places too high, especially when you look at how tall the front bumper is. It almost seems like the headlights are pointing up.

boosted98acura

That would be something to look into. I know a fellow rdx guy that has some spare parts to look and have for backups.

wantboost

iTrader: (2)

I've been looking into the same for my AWD element if we don't sell it. It's an 07 so it has the 4spd auto in it, I've been looking into either putting the later 5spd auto in it or doing a manual swap. Car is already so sleeper than even a 350hp one would be evil lol.

What I'm really curious about is if there are any revisions to the RDX 5spd auto compared to the "normal" 5spd auto Honda uses in their other AWD platforms.

Can't seem to find a rear diff assembly at even remotely reasonable prices, just gonna keep looking I guess.