sequential twin turbo idea
03-22-2006, 09:59 PM
#1
sequential twin turbo idea got a idea to pass by everyone. tell me why it wouldn't work.
i had a t76 on my 408 and it spooled instantly. steped up to the pt88 and it had significant lag. my next step will be someting in the twin t72 range. i expect that to be more laggy than the pt88. i could go with a trans brake or maybe a 2 step(not sure if that works on an auto) but i dont want a race car. i want a quick spooling set up for everyday driving. so... my idea i think would give quick spool when you punch it with the full potential of the t72's up top.
2 log headers conected to the turbos, out the back of the logs have a 2.5" cross over tube that conects one log to the other. put the waste gate on that cross over.
out the exhaust side of each turbo have a 3" down pipe. have a block off on one of the down pipes. it could be a high quality cut out style block off or maybe a pair of 50mm waste gates. then on the intake tract you would have the turbo on that side of the motor have a one way flaper valve that would block air if it tried to feed back into the turbo from the other turbo and once the presure was up high enough it would let the air from both turbos into the motor.
the idea is when the truck is under lets say 10psi no exhaust would flow thru the one turbo. because the down pipe is blocked off all of the exhaust would be forced into the one turbo. it would spool fast. once it was up to a preset psi the block off in the down pipe would open and the 2nd turbo would spool up. it should spool up real fast since the motor is all up to speed and making 600+hp allready. the intake tube on that one turbo would need to have a one way flapper on it so when it wasn't pumping the air from the other turbo wouldn't push it's way out thru that turbo.
you could have the block off gate open fast(waste gates) or open slow(like the sliding gate). you could also not have it close 100% so it would be pre spooled a little.
check out my crude drawing, my woman says it looks like a *****.
i had a t76 on my 408 and it spooled instantly. steped up to the pt88 and it had significant lag. my next step will be someting in the twin t72 range. i expect that to be more laggy than the pt88. i could go with a trans brake or maybe a 2 step(not sure if that works on an auto) but i dont want a race car. i want a quick spooling set up for everyday driving. so... my idea i think would give quick spool when you punch it with the full potential of the t72's up top.
2 log headers conected to the turbos, out the back of the logs have a 2.5" cross over tube that conects one log to the other. put the waste gate on that cross over.
out the exhaust side of each turbo have a 3" down pipe. have a block off on one of the down pipes. it could be a high quality cut out style block off or maybe a pair of 50mm waste gates. then on the intake tract you would have the turbo on that side of the motor have a one way flaper valve that would block air if it tried to feed back into the turbo from the other turbo and once the presure was up high enough it would let the air from both turbos into the motor.
the idea is when the truck is under lets say 10psi no exhaust would flow thru the one turbo. because the down pipe is blocked off all of the exhaust would be forced into the one turbo. it would spool fast. once it was up to a preset psi the block off in the down pipe would open and the 2nd turbo would spool up. it should spool up real fast since the motor is all up to speed and making 600+hp allready. the intake tube on that one turbo would need to have a one way flapper on it so when it wasn't pumping the air from the other turbo wouldn't push it's way out thru that turbo.
you could have the block off gate open fast(waste gates) or open slow(like the sliding gate). you could also not have it close 100% so it would be pre spooled a little.
check out my crude drawing, my woman says it looks like a *****.
about 1.2 seconds worth at the hit of the throttle 
Very common in the big single supra setups.
03-22-2006, 10:21 PM
#4
the nitrous is great for drag racing and i do that now. really it doesn't seem very complicated to me. just a flaper valve and some kind of block off plate. my question is will it spool faster and still have the same top end potential.
Trending Topics
03-22-2006, 11:14 PM
#11
Originally Posted by 98turbls1
sounds like an awesome plan...I'm curious to see if it would really work...Eh F*ck it...just try and if it doesn't then you only have to change a little here and there...the plan sounds pretty solid though but imagine tuning that thing...hahahaha
03-22-2006, 11:16 PM
#12
Originally Posted by SINISTER
take a look into mazda rx7 they did that i believe in the 3rd gens may give you some ideas!
03-22-2006, 11:35 PM
#14
12 Second Club
iTrader: (4)
Join Date: Aug 2003
Location: NorCal
Posts: 1,618
Likes: 0
Received 0 Likes
on
0 Posts
This thought has crossed my mind quite a few times.. I dont see why it wouldnt work. How exactly does it work in the Supras or the RX7s?
Do you have any experience with the sequential setups in those two cars?
Do you have any experience with the sequential setups in those two cars?
03-22-2006, 11:42 PM
#15
Originally Posted by Avengeance
This thought has crossed my mind quite a few times.. I dont see why it wouldnt work. How exactly does it work in the Supras or the RX7s?
Do you have any experience with the sequential setups in those two cars?
Do you have any experience with the sequential setups in those two cars?
unless i am missing something i think my idea would be really fast spooling AND capable of 1400+rwhp
03-23-2006, 12:03 AM
#17
On The Tree
Join Date: May 2005
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
here's something on an RX7.... I think it would work on a camaro.
http://www.carforums.net/showthread.php?t=26483
uh here's something on a supra...
http://www.max-boost.co.uk/max-boost/supra/turbo.htm
http://www.carforums.net/showthread.php?t=26483
uh here's something on a supra...
http://www.max-boost.co.uk/max-boost/supra/turbo.htm
Last edited by paspar2; 03-23-2006 at 12:10 AM.
03-23-2006, 12:16 AM
#18
TECH Apprentice
iTrader: (16)
Join Date: Jun 2004
Location: So Cal
Posts: 305
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by paspar2
here's something on an RX7.... I think it would work on a camaro.
http://www.carforums.net/showthread.php?t=26483
uh here's something on a supra...
http://www.max-boost.co.uk/max-boost/supra/turbo.htm
http://www.carforums.net/showthread.php?t=26483
uh here's something on a supra...
http://www.max-boost.co.uk/max-boost/supra/turbo.htm
@ 
03-23-2006, 12:52 AM
#19
Why not run a divided housing with an individual exhaust feed to each scroll. Run a large waste gate off the one side and have it start opening at 7psi or so to allow more exhaust flow. It provides very fast spool with about the same flow capacity on the top end.