yellowfever#154
Full Access Member
Those of you running twin turbos, what are the turbo sizes that you are using and what boost pressures do you run?
Twin Turbos
- Thread starter yellowfever#154
- Start date
Dom426
Full Access Member
i would personally not go smaller than 76s and would not push it past 20#s unless your o ringed that should net you right around a 1000 whp
yellowfever#154
Full Access Member
505'sFastestViper. said:
I had a feeling you would be the first to answer Dom
. So basically the turbos are capable of more than that, but they are adjustable with the wastegates, correct?Anything over 20 #'s needs O-rings?
anything much over 20 psi and you need o ring the head, the wastegates are adujustable with springs to creat your boost, but the boost is controlled by the boost conroller.
Twin turbos would be sweet Tyler!
yellowfever#154
Full Access Member
Stinker said:
Doesnt the boost controller control boost by altering the position of the wastegate.
Breakdown of the system, not exact but close
you have one or two turbos, in the exhaust system you have one or two wastegates depending.
now as pressure increases the spring in the wastegate will start to get pressure, and as it reaches the springs "rate" it will open the wastegate to release pressure.
Say you have a 5lb spring in the wastegate, the wastegate is capable of 10 psi, so as it increases pressure the wastegate will releive pressure at that psi.
but there can be "spikes" in other words , things dont allways work like theyare supposed to.
so you run a boost controller, it uses solonoids set up with vaccum lines and it regulates the psi. so you can set boost for say 2lbs and the controller want let the boost go over 2 psi, and keep the spikes to a minimum.
depending on the set up, say 15lbs can net you 1300hp on a twin set up.
but with a controller you can regulate the hp accross the board.
hope this helps, kinda tired from the day
you have one or two turbos, in the exhaust system you have one or two wastegates depending.
now as pressure increases the spring in the wastegate will start to get pressure, and as it reaches the springs "rate" it will open the wastegate to release pressure.
Say you have a 5lb spring in the wastegate, the wastegate is capable of 10 psi, so as it increases pressure the wastegate will releive pressure at that psi.
but there can be "spikes" in other words , things dont allways work like theyare supposed to.
so you run a boost controller, it uses solonoids set up with vaccum lines and it regulates the psi. so you can set boost for say 2lbs and the controller want let the boost go over 2 psi, and keep the spikes to a minimum.
depending on the set up, say 15lbs can net you 1300hp on a twin set up.
but with a controller you can regulate the hp accross the board.
hope this helps, kinda tired from the day
yellowfever#154
Full Access Member
It helps for sure Tony. Just need some numbers to tell the machinist and I think I have what I need.
on compression if you decide to go turbo, stay around 8.5 or in that area, on the cam you need a cam with a ton of overlap to let the boost go yeha
bigike
Full Access Member
Or you could upgrade to the Whipple..................and put 200 shot of gasseous Squeeze on it! That ought to get you near 1000 hp..........
Remember Stock Lysholm 550 hp
Stock Whipple 635 hp............
Tuned right Lysholm 700 HP
Whipple 800 HP or there bout's when someone shoots the moon with the whipple.
So 200 to 250 shoot ought to net close to 1000
Remember Stock Lysholm 550 hp
Stock Whipple 635 hp............
Tuned right Lysholm 700 HP
Whipple 800 HP or there bout's when someone shoots the moon with the whipple.
So 200 to 250 shoot ought to net close to 1000
Scrambler1
Full Access Member
The size of turbo depends on how you have your engine built, how free flowing are the heads? How aggressive of a cam? Auto or manual tranny? Etc. For instance with mine... 522 stroker motor, as aggressive as I could go on the heads w/o going stryker, medium cam (heavy on the overlap), transbraked turbo 400 auto. I'm going with twin 88mm turbos with a smaller exhaust side, I can get you full specs if you're interested. Our very large displacement engines will spool a large turbo very fast so I'm not expecting much if any lag, any lag at the line will be covered by leaving on the transbrake.
My turbos have arrived and the piping is being fabbed as we speak, hopefully I'll have some results by early April (would have been sooner but I, um added some stuff).
Definitely go with a good boost controller, just just wastegates.
My turbos have arrived and the piping is being fabbed as we speak, hopefully I'll have some results by early April (would have been sooner but I, um added some stuff).
Definitely go with a good boost controller, just just wastegates.
yellowfever#154
Full Access Member
Scrambler1 said:
These are basically similar questions the builder was talking about. First I need to decide turbo sizes and boost pressures. Sounds like 20 #'s is max and 76mm or bigger turbo's. Then with these numbers they can decide a proper compression ratio for me. What made you decide on 88mm's.
small penisyellowfever#154 said:
yellowfever#154
Full Access Member
Stinker said:small penis
Hell I think I need some 92's then
Dom426
Full Access Member
one 88mm with a small exhaust side will make 1200 at the wheel that is what we used on my first turbo build single 98mm nowyellowfever#154 said:
Doms 98 is a monster:rock: :rock:
dom i was trying to find some instructions for a boost controller so he could see the set up, but cant find any good ones, do you know of any?:dontknow:
dom i was trying to find some instructions for a boost controller so he could see the set up, but cant find any good ones, do you know of any?:dontknow:
Dom426
Full Access Member
i dont have any on a pdf file maybe no i dont does there website????Stinker said:
stink love ya man
kissy kissy505'sFastestViper. said:
let me do some more checking , i have one more to look at
Dom426
Full Access Member
i lost a testicle this weekend gosh dam barwire 32 stitches and one less nut fuck!!!!!! they didnt catch me hahahahah but have my dna oh wellStinker said:kissy kissy
let me do some more checking , i have one more to look at
yellowfever#154
Full Access Member
505'sFastestViper. said:
That brings it down to a realistic level for me, 88's are too big. If a guy wanted 1200 max a set GTK 850's should do the trick?
http://www.turboneticsinc.com/products/index.php?products_id=945&category_id=84
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