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Underbody braces, turbos and more!

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PostPosted: Wed Jun 19, 2013 4:45 pm 
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Joined: Sat May 19, 2007 9:05 pm
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Location: Calgary, Alberta
That will be my goal for my build. I will list the mods I have and will be getting and I would like to know what it would take to safely run 14-16psi. Btw I want to keep stock compression.

My potential setup:

14b dsm turbo
Arp head/turbo/manifold studs
A quality head gasket (suggestions?)
Turbo sprint fuel pump
450cc dsm injectors
Safc neo piggyback
35% stronger clutch
Gt transmission
2" intercooler/exhaust piping

Since I have enough parts to make two engines, I will take my time to do the high power one properly.

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2006 Scion xB (fun-mobile)
1990/92 Suzuki Swift GTi TURBO (The GTiT)


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PostPosted: Sat Jun 22, 2013 6:01 pm 
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Joined: Sat Oct 15, 2011 5:03 am
Posts: 204
Location: lake stevens, wa
14b is a great turbo. Really is but you might want to try something bigger. Sticking with DSM, a 16g would be substantial. Or a t28 or small t3. Mine has the t28 it spools plenty fast. It'll help your top end which is where the gt shines anyway. Ask vr4 he is into DSM stuff too but the 16g is an amazing turbo that does miracles.

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PostPosted: Sat Jun 22, 2013 10:08 pm 
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Joined: Sat Oct 11, 2003 10:10 pm
Posts: 416
Location: Spruce Grove Alberta
mightbegiant wrote:
That will be my goal for my build. I will list the mods I have and will be getting and I would like to know what it would take to safely run 14-16psi. Btw I want to keep stock compression.

My potential setup:

14b dsm turbo
Arp head/turbo/manifold studs
A quality head gasket (suggestions?)
Turbo sprint fuel pump
450cc dsm injectors
Safc neo piggyback
35% stronger clutch
Gt transmission
2" intercooler/exhaust piping

Since I have enough parts to make two engines, I will take my time to do the high power one properly.


Not to sure of your experience, but you should Read what some other have done.

To give you alittle advice, it will not be possible to run 14-15 PSI with stock compression no matter what else you do. The best fuel tuning will not help. Full ECU would still be scary ! maybe race gas 115 octane

I did run, 12 PSI for a while but in the end blew pistons etc. a couple of times, its just to temperamental.

Your clutch will need to be good for at least 100% more! With that much boost
I got a pretty good clutch I "Spec" six puck with added super clamp pressure plate just to be sure.

The transmission will last a while if you are gentle with it and get an LSD., no drag racing!

I added a hardend end plate for the gear set, so the gears stay in place.

It is a chain reaction of elements you will need to think of, when you add more power and 14-16 Psi is a lot more power everything down the line will suffer -

You did not even ask about brakes ?
Not to discourage you, but you Now need to go read what others have done.

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PostPosted: Sat Jun 22, 2013 10:18 pm 
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Location: Calgary, Alberta
No discouragement. This is what I wanted to hear. Ill just have to buy things one at a time. For now ill have a 10psi daily driver.

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2006 Scion xB (fun-mobile)
1990/92 Suzuki Swift GTi TURBO (The GTiT)


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PostPosted: Sat Jun 22, 2013 10:36 pm 
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Joined: Mon Nov 12, 2007 1:00 am
Posts: 663
Location: Lakeland , Florida
My 2cent is just flat out the one guy is wrong about not being able to run it on anything but race gas near 16psi. If you run a good size intercooler and run a aftermarket ecu with a good tune you can run it safely. I ran up to 22psi on a stock 1.3 at stock compression for about 10k with it not getting any mercey. I had head studs, 440cc injectors ms2. I now have a 1.6 with 9.8 to 1 compression and have run 24psi on 93 but either way I would not recommend higher then 20psi on pump gas. Make sure you have a conservative tune to keep the motor alive. And if I were you I would stock up on transmission s and or use very hard tires.


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PostPosted: Tue Jun 25, 2013 12:40 pm 
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Joined: Sat May 19, 2007 9:05 pm
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Location: Calgary, Alberta
So one of the most important questions I need to ask is what is the best head gasket I can buy for this higher boost application?

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2006 Scion xB (fun-mobile)
1990/92 Suzuki Swift GTi TURBO (The GTiT)


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PostPosted: Tue Jun 25, 2013 9:37 pm 
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Joined: Tue Mar 08, 2005 12:59 am
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Location: Canby, OR
mightbegiant wrote:
So one of the most important questions I need to ask is what is the best head gasket I can buy for this higher boost application?


There is a SGP mls head gasket available overseas, Strider has them from time to time or you can search for the part number and get it shipped here. Nothing beats OE quality there........

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PostPosted: Tue Jun 25, 2013 10:03 pm 
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Joined: Sat Mar 27, 2004 4:15 pm
Posts: 3130
Location: Brantford, Ontario, Canada
Is the t3 fuel pump going to be able to keep up?

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PostPosted: Wed Jun 26, 2013 11:33 am 
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Joined: Mon Mar 14, 2005 10:19 am
Posts: 361
Location: Canberra, Australlia
MLS part number here http://www.redlinegti.com/forum/viewtop ... Mls+gasket

T3 pump too small. Best get new pump with plenty headroom eg. Walbro

450s injectors good choice. Get newer of two version (black new, blue older). Find dead times or pm me as I have them somewhere (this will improve accuracy in tuning with the injectors).

With exhaust would go bigger. Pick what's cheap but probably would go with 2 1/4 or 2 1/2 inch.

Can do standard engine on 14-15psi but have to have excellent tune. Suggest small drop in compression to maybe 9.5:1.

Transmission is going to struggle if you are not very careful. Gt trans with new bearings and an LSD.

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