kabooski

Im not at all impressed with 379 to the wheels
at 15.5-17 PSI on his dyno sheets

I think that is VERY sad Mod-to-HP ratio

I made a bit over 400 at only 14PSI with a T66 .81 Hotside
11.72@118



Marshall should post what his car has run in the 1/4
and especially the MPH in that run that will indiciate how the car pulls with such a small A/R

Hey you have your mind made up
so go for it and we shall see who is right
thats the only way to do it
put real to potential too task

fc1jz

I am just going to try. What will that hurt? I can put it on there, see what happens, and then make an educated decision. If power drops like an aging titty after 6k, I will come on here and tell you that you are the king. If not, I will say Marshall is the king. The competition has begun

widebody2

I am sure surgemonster will jump in here soon. He also used a t66 with a very small exhaust side and did some pretty good things with it. If he doesn't jump in here you might want to shoot him a pm. he'll answer all your questions about it. BTW that turbo is ssautochrome's "GT45". he kind of names his turbos what ever he wants so if its confusing thats why.

fc1jz

Yeah, I noticed he doesn't use the "traditional" methods when describing a turbo. But hey, to each his own, he is still a top notch seller in my book. I think I will be happy with the outcome from what I am hearing. 400whp here we come!!!!!

Marshall

120 mph, thats 2 more than 118
Like I said, comp was in the high 6s. Just giving him an idea that it doesn't choke the engine above 6k.

kabooski

not really pal

at the track the best MPH is 119.97
so you got me by .003 tenths

fc1jz

Hmmmm....you have more horseys and he still beat your trap speed. Do you think that could be because of spool time?? His turbo is in its powerband sooner, thus increasing his trap speed and lowering et's???

Perhaps a 4th gear pull on the hwy would show the advantages of a larger a/r turbine, but the advantages don't seem to show up on the street and strip.

As far as daily driveability and the occasional auto x, It seems that using a smaller turbine will allow you to run a larger turbo without sacrificing driveability.

Well done Marshall.

black99

Not bashing but you need:

Fuel pump
down pipe/pipe for wastegate too

I commend you on doing it on a budget however I myself would have went the extra mile to get a new garrett peice rather than buying the ebay t70.. but that's just me.

fc1jz

OH yeah, I allready have a fuel pump, came with the car when I bought it. I just have to install it. It is a walbro 255.
And I was figuring the dump tube with the DP since I am having it exit through the exhaust rather than open air. I already have a gutted hi-flo cat/midpipe (for that emissions friendly look) and a catback.

kabooski

why has he not stated the 1/4 mile time?

theres no excuse (traction issues etc)

I ran 12.3 on plain plain street tires
with a 2.2 60"

besides next time I hit the track im going for 10's :

Also remember I have a FC
FD trannies have slight diffrent gear ratios

fc1jz

Good point...

nice 60", what type and size of street tires were you running?

kabooski

Toyo proxies

255/50/16

the 11 second pass was done on 255/50/16 BFG drag radials with a 1.63 60'

fc1jz

how much wheelspin in either run??

Marshall

sorry, 12.20-12.40s @ 120, 2.1-ish 60's, street tires.

Going easy on the car to get a few traps.


....I find it quite funny we get questioned so heavily for .70s or .68s on T4 footprints when a 1.06 AR GT3540 (T3 footprint) is roughly the same size. Nobody slams 3540 owners.

fc1jz

Nice, I would be happy with those numbers indeed.

Anyone remember the wheelspin factor during these runs??? Do you have anything done to prevent hop??

My car hops like a horny bunny when I get wheelspin.
I need to get a diff brace.

andericus mack

I'd give it a shot. You may be very surprised at how
well it works. I have gone down on the turbine a/r
against conventional thought with very good results.

fc1jz

I am almost done with the conversion now. Manifold fit good except The w/g flange holes were tapped crooked so I had to drill them out, and use nuts/washers to attach the w/g.
Turbo is hooked up with braided ss oil feed and return lines (fabbed at local machine shop).
Next step is installing the fuel system.
Power FC came in yesterday So I will be installing that as well.
My intercooler is at the machine shop getting reworked for a custom setup to utilize the vents in my CF hood. I am hoping for a sort of venturi effect on the intercooler.

I will keep everyone posted and I will take some pics soon.

Whats left:
Custom fab Downpipe and wastegate dump tube.
Custom fab Intercooler tubing
Couple more block off plates
Install Fuel Rail/ss fuel line
Install and tune Power FC
And I am sure a few other things I am forgetting

fc1jz

Did my fuel today. Need to know if i need to run resistors with 1600cc bosch injectors. And if I do, what specs on the resistor.

Heres what I wrote about putting in the fuel rail/injectors.
https://www.rx7club.com//showthread....hreadid=299149

SPOautos

I was running 125mph with upgraded BNR stage 3 twins

STEPHEN

Marshall

Thats impossible Stephen! You're choking the motor with those stock exhaust housings.

turb0x2

iTrader: (71)

just curious of any updates on this turbo man,...

skim41

me too

widebody2

me 2

Boostn7

>I was running 125mph with upgraded BNR stage 3 twins

Thats impossible Stephen! You're choking the motor with those stock exhaust housings.<


Yeh, impossible :-)

I only did it 4 times with stock non-seq twins !!!!