Running turbos in paralell...
 

If one were to run a set of two turbos would one be able to sum the two boost ratings, or is there some other formula to use?

IE, if i had two turbos that could produce 7 psi, would running them both result in 14 psi?

Re:Running turbos in paralell...
 

In short, no. If both made 7psi, it would still be 7psi overall. Think if you had to two 30psi tires, and connected them, they would still be at 30psi.
;)

Re:Running turbos in paralell...
 

Ok. So it's like voltage. So what would be the best way of producing 30+psi from a 1.8L engine?

And what stand alone systems are capable of handling such levels?

Re:Running turbos in paralell...
 

I think its more like can your motor handle 30 psi. You will need to buy alot of components for the motor to handle anything around 30 psi. You can use the AEM stand alone, Zdyne Stand alone, or Hondata.

Re:Running turbos in paralell...
 

I think this guy is running a Toyota, Not a Honda. Either way to run 30psi you are going to need a bulletproof block with some type of standalone managment, Speedpro/Motec/TecII/Accel.

Jeff

Re:Running turbos in paralell...
 

Well, I'm told the rods that come stock with the bottom end I'm planning using can withstand 275+hp, but I'd still rather get custom rods. The pistons that I've decided on are forged and cermaic topped... The block will most likely be bored and re-sleeved, even though it's cast iron. I can't really do anything about the crank though, probably just get the thing shot peened....

As for electronics, I wanted to go with an SDS, but those handle only up to 2 bar. (3 above vacuum). Most systems don't handle past that either...

Re:Running turbos in paralell...
 

Paralell ??

For huge engines this works.. "Twin turbo" But keep in mind each is getting less exhaust charge than one alone would.. I belive the benifits are to run 2 small units to get improved spool times, e.t.c. I dont think total output would be much higher. But the engine may be more responsive on a twin turbo setup. :P

Re:Running turbos in paralell...
 

DONT get ceramic coated pistons, this is SUCH a stupid thing it hurts if this and other "miracle cures" worked why dont manufacturers use it?

answer.. because pistons are a massive heat sink that draw heat away from the combustion chamber into the block and the oil that gets splashed against the back of the piston crowns by oil spray jets..

now your gonna coat them with a substance that deflects heat back into the combustion chamber .. so the heat has to dissipate through the head and cylnder liners..

thus the valves expand too much and stick in their guides, and as ceramics by nature hold heat quite well your making detonation more likely..


also, metal expands, ceramics dont.. so after this stuff is applied, and your engine is running the pistons will expand and the ---- will crack anyway..


what a load of bullshit

build an engine properly.. real power doesnt come bottled,in coatings or any other ---- like that



(and before you ask i have a material science qualification so im quite well qualified to comment on this subject!)

Re:Running turbos in paralell...
 

Actually, I'm using OEM Toyota pistons. They come that way.

Re:Running turbos in paralell...
 

i stand corrected.. its still a faggot ass thing to do


any pics of these pistons, and do you know EXACTLY what the coating is as "ceramic" is as vauge as me saying "a black one" when asked what car i own

Re:Running turbos in paralell...
 

I always thought the main idea behind twin turbos is that they're sequential in many cases meaning that one will work for low to mid rpm and one for higher.

I'm sure someone could give a more technical explanation or verify the validity of this - I'd love to hear it since I've got the same question.

Re:Running turbos in paralell...
 

you're right about twin turbos that are in paralell. one is for low/mid and other only boosts when you're in high rpm.
also reduces lag.

on the other hand if you twin turbo lets say a bb chevy, with a turbo on the end of each manifold. you could add the sum of the two pressures. since they're independant.

i'm seriously thinking of ditching my crx turbo project and twin turbo charging my chevelle. it has a 396 and i probably could run easily 15psi without retarding timing at all. and make like 600hp. and run 10s, with monster slicks of course. it would be more fun than my crx i think. i dunno though. its fun to have a fast daily driver. but when its a sleeper you have to prove yourself to every single ricer that wants to race... gets old after a while.

http://www.crpud.net/~jbliss/pics/chevelle_side.jpg
http://www.crpud.net/~jbliss/pics/ch...gine_front.jpg
Johnny

Re:Running turbos in paralell...
 

I'll tell you what gets old...seeing and hearing bout that damn chevelle not to mention the camaro.

Re:Running turbos in paralell...
 

maybe you should re-check them mission statement from this website.

all homemade turbo applications. NOT JUST HONDAS.

Re:Running turbos in paralell...
 

Indeed!

I would love to see some v8 turbo setups.

Jeff

Re:Running turbos in paralell...
 

jeff i thinkin about twin turbo charging my chevelle and making it into a super-street dragster. it would be pretty sweet. not very hard either. just new jets in the carb and piping.

but the roll rage/slicks/ext would get expensive fast :(

Re:Running turbos in paralell...
 

you can put a turbo set-up on a v-8 usa all-star ( no offencse) and only have to change the jets???

Re:Running turbos in paralell...
 

you have to buy or make something to connect the charge pipes to the top of the carb.

you can run quite a bit of boost on a big block chevy without retarding the timing. or even cooling the charge.

the jets only put as much gas as related to how much air is coming through. if more air is coming in more fuel will travel through the jets. you can also just have big jets in the secondaries (only used when it boost most likely) and keep regular jets in the primaries (cruising around/mild acceleration).you can adjust the jetting very easily and you can get monster jets for holly carbs, cause they're used in such a wide range of applications.

Re:Running turbos in paralell...
 

I'm also interested in sb chevy twin setups. Met a guy in Naples, Florida w/a 70 Camaro, 396 running twin To3's. He used Volvo/Penta marine manifolds to hook it up and custom built a carb bonnet for the Holley 850 dbl. pumper.
I have a big ass 4wd blazer w/ tbi. 210 hp is way too weak for this thing but it will seldom see 4000rpm. Would running a pair of small turbos be a good way to go?

Re:Running turbos in paralell...
 

does the blazer have one of those low compression 350s?
my old 80 GMC sierra classic had a low compression 350. it was so slow :P, it had headers & intake & big carb. it helped a lot for tourqe but the ------- was slow :).

even if you ran one turbo it would be pretty cool. if you're using this blazer for a mud runner or something a turbo wouldn't be a very good idea. cause you'd have to spool it to make any power, and you would just lose traction. but if you're just interested in driving a fast truck, one or two turbos would be sweet.

Re:Running turbos in paralell...
 

http://www.ae92gts.com/gze/images/gz...w_slugs_th.jpg
http://www.ae92gts.com/gze/images/gz.../new_slugs.jpg

Like that. It's coated above the #1 ring only

Now as what exactly that coating actually is, 'ceramic' is as far as anyone I've asked knows.

Re:Running turbos in paralell...
 

I would love to see a twin turbo setup and I think the manifold set up would be pretty simple as well as the charge piping. I am curious to know what would be the best working size turbo though because most small blocks don't rev over 5500RPM's unless they are built and still you might get 7000RPM's with a light build. If you put in some dished pistons and lower the compression some I think you could build a wild car even out of an old 305 Caprice hahah. I have to stop talking now before my imagination gets me in trouble.

Re:Running turbos in paralell...
 

Sneak peak guys...

B-Series, running a Custom Twin Turbo setup..
https://www.homemadeturbo.com/tech/manifold/tt1.jpg

https://www.homemadeturbo.com/tech/manifold/tt2.jpg

I have NO other details on this, so dont even ask, supposivly its top secret ;)

Jeff

Re:Running turbos in paralell...
 

i actually thought about doing something like that for all of maybe 5 minutes with like two teeny ihi turbos or sumthin

Re:Running turbos in paralell...
 

same here, but i never gave it the boot, its still up there

Re:Running turbos in paralell...
 

Damn...

Even with a stroked out H22 this would be a longshot...
I mean how the hell you gonna get enough air flow to spool up two large turbos? Even if they were the T-25's i got.
As far as i know Porsche were the only peeps to do a TT 4cyl. But that was using sequential turbos. Dont get me wrong is a cool concept, but thats a turbo off of 2 cyl...
mabe @ 10000 RPM. On NOS launch. there is a reason that u dont see anyone running a TT honda...

But its cool to imagine!
and good luck!

Travis

Re:Running turbos in paralell...
 

if the units were tini enough it would work just fine.. but those look pretty mamoth for this application.

Re:Running turbos in paralell...
 

I'd suspect that he's running some sort of ALS in there.

Re:Running turbos in paralell...
 

I just thought I might throw this out in the open.....

A Fiat 1600cc 4-cylinder run @ 30 Psi revving to 13000 RPM produced 959 HP!!!! On an enormous turbo that weighs in at 12 KILOS (OVER 25 LBS!)!!! Of course this was on a track racer that will hardly ever see anything south of 8000 RPM, but just saying huuuuge HP numbers can be pumped out of small engines. Also, the same turbo set at 30 Psi ona 2000cc motor only made 836 HP but revved to a lower 9000 RPM.

If you want to see the turbo go to www.turbo124.com, scroll down and it's hard to miss. And if a single turbo can make that much HP on a fully built motor, I'm sure that a TT setup on a slightly built Honda 1.6 liter could be very, very cool.

I'm about to start piecing together a turbo kit for my 1981 Fiat X 1/9 (2 seater MR 1500CC). I have a friend who just totaled his 92 Talon Tsi that has a 16G turbo on it, and looks like that'll be the snail for it. I'm still in the planning stages, but I'll be sure to keep posting stuff on it.

Sean