FYI, turbo

[brian89gp]

In case anyone read my site and is planning on copying what I did turbo wise, I think that the Toyota CT-26 turbo that I used is just barely too small. For a low boost auto car it *might* be alright. The exhaust side has too small of an AR ratio and it feels like its plugging up the engine, almost like what a bad cat converter feels like. The CT-26 would probably be better suided for a 3100 or 3400, the 3.4 just flows too much and revs too high.

[93LuminaZ34va]

So what kind would you go with? I just wrecked my Camaro RS this weekend, and if its totalled, the Z34 is getting all the insurance money, which means I KNOW a 5 speed and possibly a turbo setup..... maybe a T3/T4 hybrid?

[brian89gp]

A T3/T4 has been known to work in Turbo DOHC Fiero's, so I don't see why not. A full T4 would also do. Its just tricky picking the trims and A/R ratio's, you could have a T4 that supports 300hp or one that supports 800hp.

[93LuminaZ34va]

Aren't the T3/T04 hybrids supposed to spool faster? It'd be a plus, if I remember rightly.

[brian89gp]

With a t3/t4 hybrid you will have the compressor flowing more air, and the turbine is smaller which means in general it will spool faster. Here is the thing, you have to be very careful to get a large enough turbine or it will be acting just like my CT26 is, a big plug in the exhaust. Some of the smaller T4 turbines are smaller then the larger T3 turbines

[93LuminaZ34va]

Yeah. I've been looking at the specs and all.... both for the Z34, and a possible project that I may do, just for sheer difference. Pretty interesting

[brian89gp]

The sizing debate has been moved to the boost section:

http://www.60degreev6.com/forum/viewtopic.php?p=11909#11909

The concensus, stock the CT26 is too small, modified it is definately viable.

[RedZMonte]

I have said before that the ct26 was to small. i can tell you from experience that a t3 based turbo will most likely be to small, unless you get a insainly monsterous a/r. myself and timg both run a turbonetics "T04E Super 60" with a .68a/r and a "P" Trim. I could not have asked for a better choise with the DOHC. We see ~2psi up to ~3100 rpm's then when the car naturally takes off at ~3200-3300 rpms we hit full boost fast!

definatly stay with a T4 turbo. Tim G runs a 2.25" press bent X-over and 2.5" press bent downpipe and catback.

I also agree that a T3/T04 Hybred turbo would be very well suited for the 3100/3400 pushrod engine.


RedZ

[timg]

if anybody is interested in my input, I have responded in the other thread.

Tim

[Anonymous]

If you are doing a turbo in a 5-speed, I think a 3" catback would be your best choice. I am already planning on a 3" system, but this is N/A. Howver this will be with a pretty well built motor, including P@P heads/intakes, 96 plenum, headers, SI valves/springs, etc.

I have a friend with a 91 Talon TSi, and he is putting a 3" press bent exahust on his close to stock car. And my car without headers would beat that thing up pretty badly.

[mythos21]

I don't know much about the ct26 but I am doing a motor swap into a 3rd gen RX7 and am using twin GT28 ball bearing turbos for motivation. I'll have to let you know how it works out. I currently have two Borg Warner T04b twin scroll turbos good for around 400 horses if anyones interested. External wastegated though

[mythos21]

I'm glad to see that there are people out there with info on the 3.4L motor

[Anonymous]

I'm glad to see that there are people out there with info on the 3.4L motor

We defiantely have the info, it's just the lack of an aftermarket is hurting us. And the fact that the motor is out of production and only getting older and rarer doesn't help. Which is why we all have the custom fabricate everything.

[mythos21]

Custom fabricating is a pain, but the least of our worries. I'm going to be using a haltek E6K to power the monster along with a T56 hopefully with the .5 sixth gear from an old Corvette. I think that I will go with one of three aftermarket rod manu.0- Pauter, Eagle, or Crower. I expect to pay about a grand or slightly more. There is a guy in my town who just spent four thousand to make 600+ horsepower with his motor in some custom race car. thats why I bought the motor for my project, I didn't even know they existed till then(not this particular motor that is)- I'll ask him who made his rods

[mythos21]

He spent four grand on the motor buildup, not four the full 600 horses, sorry