Let's have a turbo discussion

Alright, so...

On Friday, i picked up a ton of parts from a parted out Probe for DIRT cheap.

Including a complete turbo setup. I paid before i picked up the parts on the knowledge that i was getting a T3/T4 50trim turbo setup, which i wanted mainly for the ability to swap different turbos in and out with ease.

Upon arriving home, i realized that i didn't have a T3/T4 turbo in my hands, but rather a rare Thomas Knight bolt on upgrade from a time past when the 1st gen Probe/MX6 was a popular platform. (Well, as "popular" as it ever got.)

I am currenty running a stock Supra CT26 on my car, which has the following specs:

35 lbs/min or 437cfm
1.811” inducer
2.559” exducer
2.185” avg.
1.97" Turbine minor
2.36" Turbine major

Going by memory of the measurements and data i found this weekend, the TKT hybrid is the stock IHI exhaust housing bored out to accept a 45mm exhaust wheel, with a T3 Super 60 compressor housing with a 50mm wheel, 55mm intake side.

This turbo is rated at about 450cfm @ 25psi.

Obviously, power delivery will be WILDLY different between the two turbos, though HP output will be pretty similar.

Now, the question(s):

If the stock CT26 is rated at 437cfm or 35lbs/min, can i use simple math to assume that the CT26-57 upgrade which is rated at 49lbs/min, would flow 612cfm? (35/437 = 49/x, solve for "x")

I can trade the TKT setup i just got for a CT26-57 straight up, and that turbo would bolt directly into my current setup, allowing me to retain my "bumper-dumper" exhaust for maximum flow.

The TKT setup would make a metric assload of low-end torque, and would give me a full exhaust, turbo to back bumper. (Huge Apexi fart cannon)

Both setups are full 3" piping.

Which setup SHOULD yield a faster car? (Keep in mind i'm not running huge slicks or anything)

If more info is needed, please let me know. I usually don't have to go this deep into this stuff, so i feel a a little in over my head.

My personal opinion would be a turbo FWD car likely doesn't need more torque down low.

Though this is a very uninformed opinion.

even if you ran huge slicks, you'd probably end up leaving the majority of the diff, or third gear, on the track someplace.

nobody likes the guy that shuts down the track for an hour because they felt like blowing stuff up that night.

Strizzo wrote: even if you ran huge slicks, you'd probably end up leaving the majority of the diff, or third gear, on the track someplace. nobody likes the guy that shuts down the track for an hour because they felt like blowing stuff up that night.

That's exactly why i'm not running huge slicks. Mazda FWD transmissions are not the most robust units in the first place, and couple that with the fact that the H-type transmission is getting REALLY hard to find, i have no intention of running slicks and grenading this thing.

If you're spinning, you aren't breaking!

If i wasn't trying to keep this in Challenge budget, i'd dump a Toyota transmission on this thing.

So, so far it seems like a bigger CT26 would be the recommended route?

if there has to be a change made, i guess bigger would be the way to go.

if you're trying to keep the car at least a little streetable, a bigger turbo not working quite as hard will probably be more linear and predictable when your hair's not on fire.

Strizzo wrote: if there has to be a change made, i guess bigger would be the way to go. if you're trying to keep the car at least a little streetable, a bigger turbo not working quite as hard will probably be more linear and predictable when your hair's not on fire.

Yeah... i was just advised that this turbo would get me the same place i am now, just in a different manner. Doesn't seem worth the work to install this stuff, when i can literally bolt in an upgraded CT26 in 30 minutes. (This car is so easy to work on, i LOVE it!)

Was just offered an 88 Colt GTS Turbo (as in.... the whole car) for the turbo setup i picked up.

That's interesting.

That would give me a future Challenge vehicle for the applied price of $200. Car needs nothing but a front bumper and an alignment, already has a bunch of aftermarket on it.

Wow.

What think you?

93celicaGT2 wrote: Was just offered an 88 Colt GTS Turbo (as in.... the whole car) for the turbo setup i picked up. That's interesting. That would give me a future Challenge vehicle for the applied price of $200. Car needs nothing but a front bumper and an alignment, already has a bunch of aftermarket on it. Wow. What think you?

The only plausible excuse for not taking that trade is that you are a communist...you love your country dont you? Dont be a commie...think of the aftermarket available for the 4G63, the limited slip and AWD possibilities.

If nothing else, do it for the children

doh...wait...88. The 4g32 was still available with AWD, but Im not familiar with its aftermarket. Is a 4G63 swap possible into the 88? if so, id bet you could find it for the remaining $1800 along with some other various upgrades.

Id still do it if nothing else for the fact that after the purchase price, YOULL HAVE $1800 TO PLAY WITH!!!

4cylndrfury wrote: doh...wait...88. The 4g32 was still available with AWD, but Im not familiar with its aftermarket. Is a 4G63 swap possible into the 88? if so, id bet you could find it for the remaining $1800 along with some other various upgrades. Id still do it if nothing else for the fact that after the purchase price, YOULL HAVE $1800 TO PLAY WITH!!!

4G63 swap is possible, and the car will come with most of the mounts needed for such a swap.

I just. I dunno. The house i've been working on buying looks like it's going to fall through, seller has fallen off the edge of the earth, so there goes my huge garage space i was banking on having.

I'm trying to milk the guy for more info. I trust him not to give me a total piece of crap, he's a buddy of mine.

The problem with a $200 Challenge car is it doesn't give you much recoup to play around with at all. Unless there's nothing to recoup.

Osterkraut wrote: The problem with a $200 Challenge car is it doesn't give you much recoup to play around with at all. Unless there's nothing to recoup.

I don't see much recoup happening with this thing.

It'd probably be a backup DD for awhile anyways. I'd like to see the MX6 make it down to Florida first.

And i still have to decide if i even want it. It may benefit me more to just take the turbo trade for the CT26-57 to put on the MX6.