14b vs 16g for a Toyota Mr2 turbo!

[Alex_95TSI]

Yes. Im puting a mitsubishi turbo on my dsm for several reasons:
1- Theyre dirt CHEAP
2- Readily accessible
3- They have much much more potential than the stock mr2 ct26 turbo which is no good after 15-16psi and MAX 240rwhp with all appropriate mods in place while fuel runs out at ~275rwhp
4- The stock turbos have a HUGE dropoff right after 5500rpms where the car seems like it just loses all its juice. This is just the nature of the oem turbo... Other turbos maintain power to redline..


I never plan on making more than 270rwhp EVER because that would require me to change out the fuel pump, injectors & fuel rail + the use of my SAFC ( I only use it for fine tuning with the use of a AFPR) to control the injectors. Id like to stay smog legal in CA, therefore i dont want to go crzy with fuel mods.


Anyway, would you guys reccomend the 14b over the 16g or vice versa? I have heard that the spool is very similar & the power levels at under ~16psi are very similar. Can anybody comment on this? How big of a difference does the 16g make on a stock dsm over the 14b? Ive seen people put TO4e compressor housings on the td05 turbos, can this done by myself, or must it be "aligned" at a turbo shop?


And in case you guys are wondering im planning on using this custom exhaust housing that bolts onto the 14b/16g turbos and adapts to fit my oem exhaust manifold.
http://www.theturbotrader.com/product_info.php?products_id=169



BTW, i used to own a 95tsi & used to help my buddy on his 1g. Ive moved on and now own two 91-95 toyota mr2 turbo cars.

 

[Matt300ZXT]

Here's a nice rebuilt CT26 with Garrett guts:

http://cgi.ebay.com/ebaymotors/Toyo...044054741QQcategoryZ33742QQrdZ1QQcmdZViewItem

 

[Alex_95TSI]

Ceramic turbines have been known to shatter and cause some nice engine damage in the past. I dont trust them... They are really nice peices for spool, but the risk isnt worth it for me.

With that wheel, the turbo would bring me to lag city as well

 

[Steve93Talon]

3- They have much much more potential than the stock mr2 ct26 turbo which is no good after 15-16psi and MAX 240rwhp with all appropriate mods in place while fuel runs out at ~275rwhp
4- The stock turbos have a HUGE dropoff right after 5500rpms where the car seems like it just loses all its juice. This is just the nature of the oem turbo... Other turbos maintain power to redline..

This rules out the 14b because it has similar characteristics to what you're describing. I've made 289whp on my 14b, running 23psi but falling rapidly to 18 by 6k. This is also with cams and race gas. If you want something that'll hold 20psi to redline, a small 16g will work nicely and more appropriately support the power you're looking to make (presumably on pumpgas).

 

[Alex_95TSI]

most "~260-285RWHP 16g runs require ~17psi on a dsm right?

 

[ITSME4G63]

get a 16g, even a small 16g, you can run it on stock injectors and it will be still hella fast for that, I dunno bout using the stock fuel pump & injectors to attain 270 awhp though.

 

[Quasimondo]

This rules out the 14b because it has similar characteristics to what you're describing. I've made 289whp on my 14b, running 23psi but falling rapidly to 18 by 6k. This is also with cams and race gas. If you want something that'll hold 20psi to redline, a small 16g will work nicely and more appropriately support the power you're looking to make (presumably on pumpgas).

What cams were you using? Those cams I'm sure are the reason why that 14B fell off at high rpm's. 14B might still be usable on that Toyota motor if he's on stock cams.

 

[Alex_95TSI]

What cams were you using? Those cams I'm sure are the reason why that 14B fell off at high rpm's. 14B might still be usable on that Toyota motor if he's on stock cams.

Yes, i am on a stock motor.
Its kinda hard to compare the 14b and 16g at low power/boost levels because everybody has different mods & i cant find a stock for stock comparison...

 

[Steve93Talon]

What cams were you using? Those cams I'm sure are the reason why that 14B fell off at high rpm's. 14B might still be usable on that Toyota motor if he's on stock cams.

I'm running 272s. I've seen plenty of 14b's with stock cams that won't hold over 20psi past 6k though.

 

[dsm-onster]

This rules out the 14b because it has similar characteristics to what you're describing. I've made 289whp on my 14b, running 23psi but falling rapidly to 18 by 6k. This is also with cams and race gas. If you want something that'll hold 20psi to redline, a small 16g will work nicely and more appropriately support the power you're looking to make (presumably on pumpgas).

Yes. The ct26 turbo is very, very similar to the 14b in flow, efficiency, and spool.

I am SMACK in the middle of turbocharging my wifes '95 Camry w/ the 5s-fe. Becasue of the larger volume displacement, I didn't want to go CT26 either. Even though the 3sgte exhaust mani bolts right up and the ct26 bolts right to that. I hjust happened to have a small 16g lying around with about 5,000 miles on it . Based on the compressor map, I felt like this turbo is perfect for the volume increase the 5s has over the 3sgte.

I am in the middle engineering a custom adapter flange to get her to bolt on to the 3sgte turbo exhaust mani. But since you have showed me that turbine housing that mates up to a TDO5H, you are my new best friend . And I give you rep points .

A side note: that looks like a Bullseye Performance style housing. Their housing are around .55 a/r. The Small 16g is designed for a .49 a/r (7 cm^2) housing. Expect a little more lag (probably not much to even notice). But, of course, better flow up top.

 

[dsm-onster]

What cams were you using? Those cams I'm sure are the reason why that 14B fell off at high rpm's. 14B might still be usable on that Toyota motor if he's on stock cams.

I agree with everyone else on this one. Typically, a 14B won't hold more than 17-18 psi to redline. Anything over and it will start to fall at about 4500 rpms or so (from what I recall).

 

[dsm-onster]

http://www.theturbotrader.com/product_info.php?products_id=169

Do you know if the price for this housing includes the internal gate? There is no option to choose internal or go external.