Is it possible to have a low end supercharger and a high end turbo running together, to decrease / eliminate turbo lag but then have the variable control of the turbo? if so how would you set up the waste gate

You don't want this.

but it has been done. low 11 second mr2. not very fun though.

waste of money.

part of good engineering is an elegant solution, not an overly complex solution.

meguiars had a supercherged/turbocharged teg. it was in a mag superstreet or sport compact car, but its a lot easier to just go with a turbo and with the correct sizing you will be rid of almost all lag.

If you got the money anything is possible, and we are talking about lots of money and time!

hmmm

HKS "Twin-charger" system. A supercharger and Turbocharger on a Type R....

Sizing of the turbo to the engine or sizing of the piping? i am interested in FI but don't really want a "downside" it would be on a commuter car as well which worries me about the turbo. Is this an unwarranted fera?

There is no downside in the performance of a "properly" turbo'ed car! besides a little more maintenace I don't see anything wrong with a turbo.

you say lag is a downside, but IMO turbo lag is a very very very small price to pay for the HUGE increase in horsepower. besides that lag cant be any worse then what you're experiencing now in your NON-TURBO car can it?

Honestly, if you are really worried about maintenance and everyday drivability of a turbo car, you shouldn't really get a turbo.
Reliable, easy to drive turbo cars are not hard to build, but if you are used to driving and getting your oil changes at the local Mobil, turbo is prolly not the way to go IMHO.

It's not that i don't like to do maintenance I just don't know to much of the specifics about turbo's i know the concept and basically how they work, but i don't know what variables do what. oil, air, fuel, balancing of them all. i don't know why certain things make a difference. I drive about... we'll say 100 miles a day (rough figure) I really want some boost, more on the lowend then the high, "don't need to be hitting 160mph or anything just want superb launching, and a bit longer of high end. i figured supercharger was the best way to do this but? that dosen't give the same variables on boost control as a turbo?

well to put it simply to change "boost" on a supercharger you would have to change pulleys, even then you are still limited to 6-9 PSI pulleys or whatever sizes they have.

with a Turbo the amount of PSI you can boost on the street is very high 5-15 PSI, depending on your budget.

A small turbo sized for low-end performance will have the same problem at high RPM's as the Supers do.

maybe if you tell us what kind of car/motor you have we can tell you what the best setup would be, based on your goals.

EDIT: and also whether or not you want 1/4 mile performace as well or strictly good acceleration.


[Modified by BlueShadow, 3:08 PM 3/22/2002]

[QUOTE]
maybe if you tell us what kind of car/motor you have we can tell you what the best setup would be, based on your goals.

EDIT: and also whether or not you want 1/4 mile performace as well or strictly good acceleration.
QUOTE]

good idea... onme

it's a 96 civic ex d16y8 with the basics I,H,E,
and i don't really car about 1.4 mile time just good acceleration...

Maybe you should look into a B18C1/5 engine swap :D

seriously though maybe a straight T3 would be just right for you. try doing a search for turbo civic ex make sure when you do the search you change the "DAA SET" to archives.
https://honda-tech.com/zerothread?id=120353

thanks blue...

i was thinking of the swap but, wouldn't that be an extra $2000 or something? I mean correct me if i'm wrong. i also don't have any clue as to pieces parts that would be neccasary for either.

Would getting a VAFC on my limited Modded engine do anything substantial.

(thinks to self... my car does have like 115,000 turboing it might be too much stress at that mileage?)

yikes 115,000 miles !?! that is a lot of mileage. turbo'ing it now, with that much mileage with no buildup might not be a good idea.

I would look into finding out how much it would cost to rebuild your bottom end, look at both aftermarket buildup (sronger) and a rebuild using factory parts (stock).

-block
-pistons
-rods
-headgasket

i put my turbo on at 122k. a t3/t4 and i am now at 128k on my d16y8. dont get me wrong i check the engine over top and bottom. i did a compression check before and a little after the turbo and everthing is holding strong. i also plan to rebuild the motor soon but i might just let the bitch ware out and spend my money on a stand alone FMU, and after that do rebuild and or swap.

rebuilding or building up the bottom end, now would it be better all around to just swap the bottom end out to the b-20 (i heard this is done more frequently) or would i need the b series head to do that? and in that case the swap would be the better bet since i don't want to spend tons of $. My only fear with the swp is that i still won't be satisfied with the acceleration (I've never driven a b18c1-5) ? what is the story with the b20 vtec head hybrid?