1fastgsrturbo

I've searched but i need some fellow ht members to chime in and give me some opinions. The t4/t70 p trim w/.68ar is what my friend has on a soon to be built motor shooting for 500-600whp street strip machine. The t3/t67 h.o. w/.82ar is the turbo he was suppose to have but ended up with the bigger turbo for free. I understand how the t4 should be laggy on a stock motor but would the t3/t67 be any better on the stock motor?B/c of the big wheel in the t3 would it be almost as laggy as the straight t4? I know bigger is always better but the t4 sucks, at 10psi it seems like it starts to spool around vtec 5500ish and redline is 8500. Would the t3/t67 be that much of a difference on the stock motor (spooling wise). Being that the motor is about to get built should he just deal with the lag and wait for the built block then the bigger turbo would be more fun all around? Or should he ditch the t4 and down grade to a the t3?
This car also is his daily driver and commutes about 30 miles one way to work 5 days a week.

The set up now:
00 b18c1 w/ ls pistons
Jun valve springs and retainers
Type R cams
Type R valves
Jg elderbrock manifold
Full Race manifold w/ Tial 44 wastegate
Tial 50mm BOV
t4/t70 p trim w/ .68ar
3inch down pipe
2.5 inch intercooler piping
Precision 600hp intercooler
Hondata s100
1000cc injectors

The soon to be future additions:

3 angle valve job w/ a mild p&p job
b18c1 w/ benson sleeves
83mm 9:1 cp pistons
Manley rods
MORE BOOST!

DaveF

i had a t3/67 on a stock ls/vtec didnt get full boost till about ~4500 - 5000 rpm or so. kinda nice on a street car, since you wont be able to lay it all down anyways. but the top end is great !

1fastgsrturbo

his car doesn't start to spool til vtec which is around 5500ish full boost around 6ish. And thats at 10psi

LastGenEK

my setup doesnt boost till 5k but i like it! even if it did spool faster my B18c doesnt make power under 6k no matter how much boost there is

Plus in racing you engine never sees below 6k anyways..... and for the street driving, you wont build boost driving around town++++

TheShodan

iTrader: (14)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LastGenEK &raquo;</TD></TR><TR><TD CLASS="quote">my setup doesnt boost till 5k but i like it! even if it did spool faster my B18c doesnt make power under 6k no matter how much boost there is

Plus in racing you engine never sees below 6k anyways..... and for the street driving, you wont build boost driving around town++++</TD></TR></TABLE>

I've always had difficulty of those with this thinking, as "driving around town" means that in order to pass to switch lanes, you down shiift 2 gears, lay in the gas hard for half a second, just to go back to where you were again at a normal speed. Giant turbos like that on sub 2.5litre setups for "street use" always made me laugh. Especially when a smaller turboed car w/ the right compression would out accelerate them for over 1000 yards before they even caught up to them. By the time the Giant snailed car caught up to them on the "street", it was time to slow down.

That's just my old ***, I guess.

thegatekeeper14

so on a low comp car and a 2.0l you would not suggest the t4/t67?

AdamB18C1EK

i think what theshodan is trying to say is that you cant have your cake and eat it too. my opinion is this. you cant have a street and a track car. problem being is if its more "street" its slow at the track but gets better traction, low end acceleration on the street. and track cars are obviously going to prevail with higher power at the track but are often laggy as hell on the street and like he said you do run them down in the big end...but there really isnt a point when you arent mowing them down until 4th gear. just my .02

Turbocivic94

I understand what shadon is saying but I have experienced that big turbos are great for street driving. I run GT4067 .81 a/r on my car and it spools fast as hell. Our motors are so effiecent, they can spool big turbos very easily. I would not recommend 42R or S372 for a street car but T4 small frame turbos are not bad for a street car.

95exdsmkilla

for street just get GT3076 or even 3562r you will be happy

96 GSR-T

aint nothing wrong with a 67ho on the street, I run the BB version and I cant complain at all, I dont need to drop 2 gears to pass someone and I can make 15lb of boost in 4th gear at normal speeds just trying to pass someone, in 3rd gear I can easily brake boost 20+ psi in a matter of a second at 50mph.

Wopsicle69

T3/T67 H.O ALL DAY EVERYDAY DAY. Had a journal bearing on my DA integra. LS motor top to bottom, crower cams and some porting. Ive tryed the motor on every psi from 7-18. I would see about 5 psi from 3500 - 5000 rpm, but once it came up to 5000rpm the car just picked up and was gone, I would spin it to 8200rpm on the stock bottom and it loved every minute of it. Drove it 2hrs to the track multiple times, ran countless 11 sec passes at 120+mph, and then drove it another 2hrs home. T3/T67 is one hell of a worker.

Downshifting two gears and leaving the car beside you standing still with their jaws in their lap = PRICELESS

streetracer6rpt

the T3-T67 i had hit 12psi @ 4200rpm, that was on an H series though..

ahobbs

<------t3t67 B18c1 here I love it. Full boost at 5K i can pass in 5th with no down shifting. top end is a monster. i put this video in here becuase the top end speaks for itself

Disclaimer, i do not condone this. i opened it up on the highway a few times.
my civic is the red one at 333whp the other civic is a t60-1 b20vtec
then the sc300 twin turbo charged

wolve

i get where your coming from...

but there are a lot of guys who don't "need" the power to pass on the highway. my current b18cr is a perfect daily driver and i don't "need" to downshift when i want to overtake, because it's just commuting....

no hurry here, and when i "need" (read want) the power i'll just activate the giggle gas. and so it's with turbo's too, some people really just want the low end grunt of a V8 muscle (then go for a small snail) and some people don't need that grunt, but just want monstrous power on tab (it just 2 gears down ) and go for a large snail that spools/boost in the region they want the power to be at around 6000-9500 rpm

friend of mine just ordered his fullrace twinscroll s366 for his street-strip b18c1, not because he's to stupid to see that he can make due with a smaller snail, but just that he wants his powerband just there and can go occasionallly crazy at the track at 700+

Turbocivic94

I dont know anyone who is happy at one power level. you start wanting low power then maxing something out and then upgrading for more power. Nature of the beast

boostedcivicsir

i can see everyones arguement, i have the t3t67ho on my no more street car.
when i had it on the 84mm b16, it was light switch power. any gear vtec=tire smoke.

i guess it is personal preference, BUT, agreeing with the shodan, a properly sized turbo on street tires will outperform the monster. in stop light to stop light racing, topend busa hunting? well thats a little different.

i had just as much fun driving my to4b on the street.

and if you like light switch power, that can be fun also.

ahobbs

i've had tons of turbo's from the smaller to4b sc61 sc34 sc50, sc44 to the current. I'll have to say for me the most fun is the t67. But i havent done stop light type runs in forever. It's usually people that roll on my while going 60 mph.....so light switch power is my forte'

Turbocivic94

I had a lot of turbos and 67mm turbos work the best for me

ahobbs

ditto

teefunk01

T3/t67 works well for me on a basic build

HiProfile

A good topend is one thing, but when you use a smaller turbo + more boost to get the same topend HP, you almost always get faster spool, response, and a much better mid-range. Since a smaller turbo 'falls off' much more than a big turbo, that points to a much higher torque curve everywhere before that topend.

This is basicly what I'm talking about (the graph, not necessarily the turbos):
http://www.bullseyepower.com/testdata/td_s200_acura.asp


That vid shows you expecting to race, I doubt you were in 5th gear 1/10th of a second before you all went WOT. The Shodan is saying is w/o planning for it, the big turbo will put you behind for a good while.

ahobbs

yeah i know that and of course. Im just saying I personally like the 67mm over the smaller turbos. I definatly know that I take a little to spool, but Im fine with that. The way I use my car the 67mm works best. and it works well at the track for me, better than any other turbo I've owned.

black_ek

i had a t3/t67 non HO but it spooled pretty good

motor setup was basic, b18c1, GE sleeve, 9-1cr , stock b16 head, stock gsr trans, 81.50mm ONLY

full boost on 10psi at 5500rpm starts spooling around 3600rpm
but i had vtec at 5500rpm also so it was spinning till 3rd gear
caught AWD cars by 3rd gear on street tires

VtecnTurbo

t3/t67 on my ride and i like it alot )

reboosted

i went with the t3/67 h.o b.b so that i could keep ac and ps. the car made 513 at 17 psi on pump gas.