basically, the title speaks for its self, i need some names passed to me of places to check out to find help for this project, anything will be greatly appreciated

 

serves absolutely no purpose.

Answer speaks for itself

 

unless you're putting two H22s in your car, you don't want/need two turbos...

 

Why would you want to put 2 turbos on an inline -4 engine.. most twin screw set ups run on V6 where you cant have all the exhaust port on one side of the motor. My guess space would be the issue for housing 2 turbos wouldn't fit between your radiator and your block. I think you need to watch fast n furious over again to pick up some more ideas for your current build..

 

all wrong chuckles.. it's 2 fast 2 furious.. hense the 2 turbos...

if you knew enough to even start a regular turbo build, you'd probably not be asking for this information teh way you did.

stay away from my car

 

Go to the forced induction section - more people will be willing to help.

My $.02c - Two Turbos are worthless.
Do some compressor map reading and find A(one, single, individual, solo, uno, 1) turbo that will fit your application just right. This way you can get a decent spool up time along with the correct power band. There are 1,000,001 turbos out there. Just do some research. Good luck.

Note: The extra turbo is just an added expense for nothing. It serves no purpose on a 4 cyl.

 

the only purpose other than the bling factor would be if you ran those two turbos in a sequential setup. no one will have kits or manifolds to buy. everything will have to be made custom.. and now your at double the cost of turbos and wastegates..

 

[QUOTE=TheKINGPin]
My $.02c - Two Turbos are worthless.[QUOTE]

Not starting an E-Fight, but I think that a twin turbo does serve a purpose in some cars.

Example: Some drag built Supras will run one small turbo that will spool quick to give them the torque they need off the line, and one large turbo to maxamize the top end power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Not starting an E-Fight, but I think that a twin turbo does serve a purpose in some cars.

Example: Some drag built Supras will run one small turbo that will spool quick to give them the torque they need off the line, and one large turbo to maxamize the top end power.</TD></TR></TABLE>

yes that called sequential

sober was saying a twin turbo is useless on a small 4 banger

twin turbo does serve its purpose when there is a large displacement motor that is going to run high boot.. in those cases you can run twin turbos for more efficent turbo charging and easier manifolt design. think of a merge collector with 8 cylinders reduced down to a t3 or t4 flange..



Modified by prelittlelude at 2:09 PM 12/14/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">

sober was saying a twin turbo is useless on a small 4 banger
</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheKINGPin &raquo;</TD></TR><TR><TD CLASS="quote"> The extra turbo is just an added expense for nothing. <U><U>It serves no purpose on a 4 cyl</U></U>.</TD></TR></TABLE>

????????????????????????????????????

We were talking about 4cyls.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TheKINGPin &raquo;</TD></TR><TR><TD CLASS="quote">

????????????????????????????????????

We were talking about 4cyls. </TD></TR></TABLE>

hey alright reading ownz me, i confused what you said with sober, thats what i get for not reading.. i though someone just said"twin turbos are useless" i never read the rest of the post

neway yes i agree for a 4 cylinder twins are useless, sequential may be worthwhile.

 

Twin turbo is uneccesary on any motor. Exept maybe a few drag setups.
Single turbo has proven to be a better choice even on fully built supra and skylines.

And If i am not mistaking..the most powerful supras skylines etc..are running single turbo setups correct?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by camrann &raquo;</TD></TR><TR><TD CLASS="quote">Twin turbo is uneccesary on any motor. Exept maybe a few drag setups.
Single turbo has proven to be a better choice even on fully built supra and skylines.

And If i am not mistaking..the most powerful supras skylines etc..are running single turbo setups correct?

</TD></TR></TABLE>

x2.

My rx7 is going to be single turbo as well. Even with that much displacement, there's no need to have two turbos. One larger one is just fine.

As for on preludes, wtf? You can make more power than you can put down with a single turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by camrann &raquo;</TD></TR><TR><TD CLASS="quote">Twin turbo is uneccesary on any motor.</TD></TR></TABLE>

i disagree..

plus people in this thread people are using twin turbo interchangably with other meanings. supras and rx7s use factory sequential tubo chargers.. this is not the same a a regular twin turbo setup. i think that a well designed sequential turbo setup can produce more power under the curve than a single turbo. also yes most factory sequential setups are replaced for a larger single turbo, but those cars are just very high hp in the top end.. usually the crap factory sequential setup in hindering to upgrade.. so most ditch for a large single..

also how do you suggest a v8 be turbo charged just one large turbo that takes 8 primaries and can flow some rediculious CFM...

also built supras and skylines with large single turbos are good but it has been proven that with a correctly build sequential setup close to the same peak hp and trq can be reached but also with much more low and mid range do to the first turbo spooling and providing boost.

all in all i someday will under take a sequential setup for the prelude motor, so i can have low and mid response as well as high peak hp.. but if you run two single turbos spooling at the same time, this is a true twin turbo setup, then it is absolutely pointless. to end please don't make statements like twin is not good for any car. I personally watched a daily driven twin turbo v8 get tunned on the steet.. not a drag car either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">
all in all i someday will under take a sequential setup for the prelude motor, so i can have low and mid response as well as high peak hp.. but if you run two single turbos spooling at the same time, this is a true twin turbo setup, then it is absolutely pointless. to end please don't make statements like twin is not good for any car. I personally watched a daily driven twin turbo v8 get tunned on the steet.. not a drag car either.</TD></TR></TABLE>

Good luck. Factory sequential TT's have always been a problem, and these factory engineers have put tons of $$$ into R&D. What are you going to do different that countless teams of engineers haven't done to address the issue of unreliable boost spike during transition? MKIV Supra guys who have pushed the stock twins to their limits (~400whp) have commented that when it transitions to the secondary turbine, they can sometimes lose traction because of the boost spike.

And don't even get me started on the sequential TT setup on the RX7's rotary. The vacuum line "rat's nest" is a huge headache if there's a leak in there. Even then, a boost spike on a rotary is just begging for blown apex seals.

On an inline 4 motor, it's more efficient to go with a single turbo due to the limited exhaust flow (most I4's are under 2.2L), and narrow powerband (relatively short bore/stroke + high rpms). There is no "magic" turbo combination that will give you tree stump pulling low end torque, a flat mid range, and huge top end power. If you want low end with a big single, add nitrous oxide to aid in spool up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">

also how do you suggest a v8 be turbo charged just one large turbo that takes 8 primaries and can flow some rediculious CFM...

</TD></TR></TABLE>

Large frame turbo with a huge exhaust side A/R. Can you say instant boost?

 

my .02: good argument against bothering to build a sequential turbo 4cyl would be that assuming you are going to build it for turbo, a 4cyl will generally rev to boost level faster than a I6, where sequentials are used. supras and such use the first (smaller) turbo to spool the second (larger) to boost faster. hope that helps.

also as stated b4 no one will make parts so you will have to go custom which = expensive.

that said, prelittlelude if you build it, no doubt it will be bad ***, and i'd love to see it, but i'll never do it. more power to you!

also agreed on the twin turbo. a V6/8/10/12 with a turbo feeding each head with even moderate boost (8-12 lbs.) is a powerful setup when tuned properly. 350Z's are good examples of this. hell lingenfelter vette's only run 10-12 lbs if i'm not mistaken. venom 800 i beleive is 12lbs.

edit:let it sit too long and Finest beat me to this...

 

if you reaqlly want to do it i would call D.R.T they know alot about the h series and they had a twin turbo honda civic

http://www.drtracing.com

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Finest &raquo;</TD></TR><TR><TD CLASS="quote">

Good luck. Factory sequential TT's have always been a problem, and these factory engineers have put tons of $$$ into R&D. What are you going to do different that countless teams of engineers haven't done to address the issue of unreliable boost spike during transition? </TD></TR></TABLE>

i never said that i had it all figured out, but there are things that can be done to increase the simplicity of the design but thats with me knowing every inch of the turbo setup. i can imagine the R+D that the other companys have put in , and i bet there were some things they could have done if they wern't trying to make the setup last 100k miles.. if i build a setup it will be a race setup with me overlooking it regularly.. god knows when i might ever get to it, it might even only be one of those paper designs, a "what if" just to see if it could be done. i can't say if i would do it.. but i know the potential is there.. there will be tradeoffs of simplicity and reliability... good input though thanks

 

You dont need to turbo a V8. Its made for allmotor IMO. You could maybe supercharge.
But why turbo a v8???

We turbo our cars because we cant make the power that a V8 has with such higher displacement.
Built allmotor V8 can hit just as high numbers as one of our cars turbo. Its not needed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">
if i build a setup it will be a race setup with me overlooking it regularly.. god knows when i might ever get to it, it might even only be one of those paper designs, a "what if" just to see if it could be done. i can't say if i would do it.. but i know the potential is there.. there will be tradeoffs of simplicity and reliability... good input though thanks</TD></TR></TABLE>

With enough money and time, anything can happen. Build it and when it works, you can rub it in our faces.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by camrann &raquo;</TD></TR><TR><TD CLASS="quote">You dont need to turbo a V8. Its made for allmotor IMO. You could maybe supercharge.
But why turbo a v8???

We turbo our cars because we cant make the power that a V8 has with such higher displacement.
Built allmotor V8 can hit just as high numbers as one of our cars turbo. Its not needed.</TD></TR></TABLE>

Trust me, you can never have enough power.

 

Search, this has been covered before.