Twin t25 on f22

[ttcb7f22]

I know i will be building a manifold for this but which way would be better hav two ports for to a turbo or have basically a double mount log style manifold. Would a 95 eclipse be a 1st gen dsm? A guys is partign a tt 95 eclipse. not sure of the motor but i expect it to be a 4g63 so i plan to take the exhaust manifold as well as the turbos,dp,wg, and bov

I wold connect the turbo oil lines together at the oil pressure switch with the drain line in a y fitting to the pan

The coolant ports will be split from the tb

hondata or chrome still in the air Chipped p06 i plan on not runnign vtec or p28 to hook my iab to the vtec pin and more capability for 2 step

ported h23 im & tb

full 3" exhaust with 2 resonators and 1 muffler

bisi stage 1.2 turbo cam

p&p head

h22 h beam rods

4g63 stroker pistons

intercooler two in one out 2" in 3" out or two 5"x22"

two t25 turbo

Ive read that the motor may not be strong enough to power two turbos even this small but i am expecting the 2 step/ anti lag to assist with this problem.
Im looking to reach 400-450hp and right up there in torque. Positive or negative coments welcome. What would you do different or tweak.

[ttcb7f22]

So by 17 views and no comments i take it im on the right track?. I have been researching for months on a single turbo system and the opportunity for these for a fair price came about.

f22a
oem bearings rod and main
arp head studs
h22 pistons
4g63 stroker pistons
port and polish head
oem head gasket kit
Balance shaft eliminator kit
h23 intake manifold
bisi 1.2 turbo cam


The only thing that may change is the turbo selection. Maybe a holset or a garrett..Thats the only thing im indecisive about. Well and the injectors. dsm or aftermarket??

[Joey GT-R]

So by 17 views and no comments i take it im on the right track?. I have been researching for months on a single turbo system and the opportunity for these for a fair price came about.

f22a
oem bearings rod and main
arp head studs
h22 pistons
4g63 stroker pistons
port and polish head
oem head gasket kit
Balance shaft eliminator kit
h23 intake manifold
bisi 1.2 turbo cam


The only thing that may change is the turbo selection. Maybe a holset or a garrett..Thats the only thing im indecisive about. Well and the injectors. dsm or aftermarket??

You're in the beginner's section. Most of the views were probably by beginners.

However you're somewhat wrong:


H22 pistons won't fit in an F22A because they are 87mm and the block is 85mm. Assuming you're using F22A rods, your compression would rival nearly 11.0:1; not really boost friendly.

For injectors aftermarket would be a must most likely. Your setup would starve for fuel I would recommend something around 550-600cc.

[sonikaccord]

Aftermarket injectors would be the best bet, but more expensive obviously.

The dual turbos sounds like a headache and a plumbing nightmare. There are plenty of larger turbos that will give you better performance than the two t25s.

400 ft-lbs of torque is a lot! You'll run through axles and clutches like underwear. You don't have VTEC to help you out, so you will have to build up torque soon because of your limited breathing range. You should invest in some transmission and traction stuff as well.

You may need to sleeve. Are you racing this motor?

[ttcb7f22]

Oh man I meant h22 rods forged. And I'm not sure how to answer that question. I mean if someone wants to run I'd play on the empty stretch of road but not just to go fast and be quick. It will be a daily. That's the reason for the full exhaust.
What is the biggest factory fuel injectors that fit? It it the 2g DSM injectors 450cc? If in not mistaken I'd be able to push about 315 safely.


This is my dream car just to let you guys know. Im going 5 lug and factory mods. Shooting for a clean "sleeper"

[Joey GT-R]

In my honest opinion this is a waste of time. Not that I mean to deter you from your goals. Only one person in the community has documented this attempt, and the car didn't last more than a couple months, although I'm not sure why, I just remember him being unhappy with the results and parting out the build thereafter.

There are already aftermarket high performance alternatives to reach your goals, let's not reinvent the wheel here.

F22A Pistons

F22A Connecting Rods

[steelbluesleepR]

one turbo will almost always be more efficient than two, especially on a small 4-cylinder. The only reason to do two turbos (considering you've never even looked at a compressor map, let alone cross-referenced and figured out an efficient match to your setup and goals) is to be different.

[ttcb7f22]

I have been looking for a twin turbo build and haven't found one. I'm just going with a single system. I have access to a td04 and a Garrett off a f250, I will be going to the junk yard for the Odyssey spindles and I'll look for Saab's or mitsu or volvos or anything factory boosted really.Or I may just man up and go precision 67. This is a budget built did street car. new forged Rods,new forged pistons,new head studs,ic used ,turbo rebuilt,tune by a professional. Everything else I will make or change myself. Five lug conversion on painted RL rims, eBay adjustable drop coil overs on fresh struts , wire tuck, clean bay, two tone blue and purple, tan interior and 350hp turbo.

[sonikaccord]

You're going to do all this work and get ebay suspension? I'd be paranoid driving around on that, but that's just me.

Learn how to design a turbo setup. There are plenty of threads and people on here that can help you optimize a design. Don't slap parts together and hope for the best. There are steps you can take now to avoid headache and have a more predictable outcome in the future.

[ttcb7f22]

Yes I figures that from the eBay drop. Lol I have been doing research upon research upon research and the conclusion I came up with was going twin turbo t 25. Yes is a lot of piping but these turbos are most efficient on a smaller motor 1.3 and such so I will be .5 liter shy of optimu.. My manifold will not be divided so each stroke it will be getting decent airflow. Later down the road I can run a bigger cam and some head work to get a 8200 rpm redline to have full boost longer. I still figured I'd have full 7-9 lbs of boost spooled from each turbo by 3000rpm. I really want to do this I'm looking at the turbos weds and seeing what else I can grab.

[Joey GT-R]

I have been looking for a twin turbo build and haven't found one. I'm just going with a single system. I have access to a td04 and a Garrett off a f250, I will be going to the junk yard for the Odyssey spindles and I'll look for Saab's or mitsu or volvos or anything factory boosted really.Or I may just man up and go precision 67. This is a budget built did street car. new forged Rods,new forged pistons,new head studs,ic used ,turbo rebuilt,tune by a professional. Everything else I will make or change myself. Five lug conversion on painted RL rims, eBay adjustable drop coil overs on fresh struts , wire tuck, clean bay, two tone blue and purple, tan interior and 350hp turbo.

A turbo off a V8 will take forever for you to spool with the F22. By the time it hits, you would have lost the race to a properly mated powerplant. Factory turbos are good for the engines they were mated with by the manufacturer. It doesn't equate to being good for your application in the least. You claim to have done research but you are really all over the place the more we inquire into your proposed "build".

I have been doing research upon research upon research and the conclusion I came up with was going twin turbo t 25. Yes is a lot of piping but these turbos are most efficient on a smaller motor 1.3 and such so I will be .5 liter shy of optimu.. My manifold will not be divided so each stroke it will be getting decent airflow. Later down the road I can run a bigger cam and some head work to get a 8200 rpm redline to have full boost longer. I still figured I'd have full 7-9 lbs of boost spooled from each turbo by 3000rpm. I really want to do this I'm looking at the turbos weds and seeing what else I can grab.

Can you show us your "research" sources? Nothing adds up to twin turboing a four cylinder other than wow factor. Also you are almost a full liter of displacement off. You have a 2.2L, not a 1.3L; that can significantly affect the powerband when making a choice for the proper turbo. It seems to me the only understanding you have is of the components of a turbocharged system and not so much the concepts of how they perform well together.

[ttcb7f22]

Isn't that what a 2step is for. To be at full boost before the race actually begins????

The only thing that was changing is the turbo setup. I was looking for conversation and I got it but please don't say I didn't do research. That's really a slap in the face. I googled and trolled and compared and when I finally post this is what I get. I'm not complaining by any means just venting now. I'm done.

Also reread what I have written. You were such in a hurry to flame me you made no sense.

I also should not use run on sentences and proper punctuation so it's a process.

Can someone show me something saying this will not be functional, or be inefficient?

[deevergote]

Sonofabitch. I had a long thing typed, and hit the backspace key... which sent me back to the main forum menu for some reason. I apologize, but I don't feel like typing it all out again. This won't be as thorough, or as friendly.

First off, a twin turbo F22A has never been done on here. It CAN be done, but it will never be as functional as a single turbo system. The flow rate of just two cylinders will be limited, and the exhaust pulses won't be as useful as the full 4 cylinders. In fact, it's possible that the exhaust pulses from just 2 cylinders might do damage to the turbos. Talk about turbulence!

The up side is that it is unique, and that a t25 turbo is dirt cheap. Two of those will be cheaper than one larger turbo in most cases.
I'm curious about this "tt DSM" though. There is no such thing as a twin turbo 4G63 (from the factory.) The only twin turbo DSMs were the 3000GT/Stealth, and they had V6s. If the car you're getting parts from is twin turbo, and it ran, then the owner is the guy you need to be asking for advice... as he essentially did what you're planning to do.

Now, your plans seem a bit shortsighted. It seems that you don't quite have a thorough understanding of what it takes to boost an F22A. If you know more, it's not showing here.
First off, you are definitely going to need more fuel. 450cc MINIMUM (DSM injectors will actually work... though I'd stick to 1st gen. That 95 is a 2nd gen.) The 500-600 that Joey recommended is probably even smarter. Don't overdo it, though. Don't go too big, unless you know you'll need it.
Next, get your engine management plans in place. From what you typed, it doesn't really seem like you understand what it all entails. "hondata or chrome still in the air Chipped p06 i plan on not runnign vtec or p28 to hook my iab to the vtec pin and more capability for 2 step", aside from being a completely nonsensical sentence, just shows that you have given this very little thought. Do you know anything about tuning an ECU? If not, have you found a tuner that can do it for you? Hondata makes great stuff. Crome (not "Chrome") is fine for basic hobby type stuff. A P06 will do what you need it to do. What do you mean about "not running VTEC"? Of course you're not running VTEC. You have an F22A!
2step is SO incredibly hard on your engine. Especially if it's just programmed into an ECU. In that case, it's just a fuel cut... and do you know what happens to turbo engines when you cut fuel? It's not pretty. Anti-lag is very different than a 2step, and is even harder on the engine. It essentially involves purposely igniting the air/fuel as the exhaust valve is partially open, so the explosion keeps the turbo spooled when you're off-throttle. If this isn't a race car that you plan on rebuilding every season, put this stuff out of your mind.
Don't waste your time or effort cobbling together internals from an H22A and 4G63. You can buy turbo-friendly forged pistons for the F22A. They can be paired with forged rods also intended for the F22A, or they can be used (with modification) with the stock rods. If your power goals aren't too extreme, the stock rods will hold just fine. It's the pistons you're going to need to worry about. You will NEED forged pistons. My advice is to overbuild this engine. Even so far as to get it resleeved by with Darton or Golden Eagle sleeves. Overbuild, since it may take a good deal of abuse as you work out the kinks in your experimental turbo setup.

Don't bother with the turbo cam or P&P. Not yet, anyway. That can come later. Focus on the internals, the fueling, the engine management, and the turbo setup itself. Get it running well before you put any additional mods into it. You don't need to spend $1500 on a built head, only to end up putting a piston into it, or find that you blowtorched the valvetrain.

My advice is to do LOTS of research. Understand turbo systems thoroughly. Understand every mod. Understand every reason behind it. Understand how each mod affects every other. Use common sense. Look through your list and ask yourself "why" for each and every part. If you can't give yourself a thorough and honest answer, you need to learn more.

Finally... lower your power goals. Set your sights on 220whp to start. If you can make that work, then focus on doubling it. Also, keep in mind that you're in a 3000lb FWD car. Putting that power to the ground with 450hp and 450ft.lb is going to be tough. I have a CTS-V making less power than that. It has an extra 1000lbs on the CB7, RWD, LSD, traction and stability control, wide performance tires, and suspension designed to handle the power... and even then, I have to focus when taking off. That is a LOT of power... and in a lightweight FWD car that was never designed for it, it'll be difficult to control.
Having over 400hp in a CB7 is like having a 15" long dick. Bragging rights are cool, but it usually ends up being more of a frustrating inconvenience than anything else.
Most 400+ hp CB7s I've seen usually end up getting the same final modification shortly after that goal is reached... a for sale sign.

[Sordz]

Isn't that what a 2step is for. To be at full boost before the race actually begins????

Unless you have a built transmission and big slicks you wont want to use 2step and have full boost off the line. You will spin instantly on the street and not go anywhere... Thats why I like my big turbo h22, first gear doesnt build much boost and pretty much like launching a N/A car on the street, although it still will spin.

Take the advice here, no one does twin turbo 4cyl because its a waste of time/money/energy for no gain. If you really want to be different you must do quad turbo

[deevergote]

A big single turbo is easier on the engine, and WAY better on gas if you tune everything right, too. It's better not to be driving around in boost when you're just cruisin on down to the Piggly Wiggly. Save the boost for when you actually want to use the power.