RX7s

RP claim that the T78 spool up faster than the gt35/40 ?? Is this true?

This is what they state in their web site:

The GReddy T78 kit is the same high HP turbo which we've used extensively at our shop and our own race car. This setup produces an easy 400+ RWHP at 15psi on pump gas and with proper tuning and more boost, is capable of propelling your RX-7 into the 10's. We've produced over 500 RWHP using this exact turbo setup out of the box. We've found this turbo spools better than the equivalent sized Garrett units. The kit comes complete with top quality parts, stainless manifold, wastegate, air filter, it also includes all necessary hardware and instructions.

Manolis_D

iTrader: (2)

AHAHAHAHAHA

There is no way that the T78 is going to spool up faster than the GT35/40. At least i'm pretty sure of that fact

Look around on the forum... people usually associate the T78 with a pretty large amount of lag (depending on whom you talk to), while the GT 35/40 is reputed to be very fast on spoolup (partially due to the Ceramic ball bearing CHRA I believe)

Happy Turbo Hunting
Manolis

Greg

If you are going to put up a BS flag know what you are talking about. I havent seen **** results as far as spooling and comprssor maps for the gt3540 Do you have one installed?

Poweraxel

---whoops i actually posted on my friends name----

yes this is bullshit... i had the T78 Twice! and the GT35/40... the Gt35/40 spools up MUCH faster than the T78...no doubt about it


Steve

87GTR

iTrader: (61)

also thier site does not say T78 spools faster than GT35/40 it says <b> equivalent sized Garrett units</b>

please read it out loud to yourself before you post

artguy

I run the gt30 ballistics and my turbos spool FULL BOOST by 2800rpms

whats spoolup time on the gt35s?


j

Kurgan

I hate it when people say "Full Boost". A stock T2 runs 7.5 psi at "Full Boost". An FD runs about 12 psi at "Full Boost".... What kind of "Full Boost" are you talking about?

JBC

I don't think they were referring to BB turbos when they said garrett.

Zero R

iTrader: (1)

I've run in both cars, but I will take my 35/40 every time over the T78 it's a great turbo it just doesn't feel as responsive.

Mid_KnightFD

Go race ari and then say that.

Zero R

iTrader: (1)

Don't need to. I'm speaking from my own experience, on the street the 35/40 feels more responsive.

VTECthis

iTrader: (4)

You also cannot just say that one turbo has more lag than another, in which gear is this? Our race car has a HUGE large frame turbo and in first gear, we get boost almost instantly with a simple street port, the whole lag question is BS, there is no answer to it. Weve run a T-72 garret on the street, and with the proper ports, it performed well, you dont need something small like a T04E to have a street car. Nobody should listen to most of the little kids on this forum, they just repeat what they hear, and noone thinks for themselves. I can show you a huge turbo on a properly preped car that spools up faster than a smaller turbo on most of these "shop" cars.
Rob
93 RX
Team Reactive racing

LUV94RX7

iTrader: (3)

GREAT, than show me a dyno chart.

Ken

Poweraxel

im interested too...

LUV94RX7

iTrader: (3)

I don't get it. Isn't a matter of physics. Exhaust is what spins the turbos. Big turbos take a lot of exhaust to get them going. Small turbos take less to get them going.

It seems to me you can't get both. A large turbo will not produce power down low in the rpm curve because it can't spin fast enough. Too much mass. A small turbo will spin easily because of less mass to spin it.

You can't have it both ways.

Why do the big time drag cars dump NOS in at the start?

To get their big turbos spinning, then when they kick in they don't need NOS anymore.

If you want decent streetable performance than get a smaller turbo, if you want drag strip high end performance get a big turbo.

At a drag race you are 95% of the time above 5k rpms.

On the street you are not up there. Jeez who runs at greater than 5k rpms on the street? Not me. At least not very often.

If you disagree, please post your response.

Trust me, JIMLAB agrees with me on this one.

Anyone who disagrees with JIMLAB better know what they are talking about.

He is one of the most knowledgeable people on this forum.

I'll take it to the bank on what he says. None better in my book.

Ken

artguy

cheers to luv...cheers to poweraxel...lets see the charts!



once again gmonson provides an alternate way to think about such things. I hadnt thought of that...

everyone knows the big singles have their powerband strengths up top....who would dispute that? Everyone also knows that the smaller turbos will spool quicker if they are of the same bearing design..tis just math right?...bb spooling quicker etc...even mazda knows that...tis why they went with the small seq setup...for streetability

vtec this...so what you are saying is "if my race car is tuned right it will run better and spool faster than some kids street car that runs like junk?" hahah...of course that is the case. Get the other car tuned by the same tuner and then you should have the answer...you cant compare apples and oranges that way. how is that statement any different than one made by the "shop car kids" on the forums?

for me..its all about how ya want to use the car. it depends if you want a race car that needs n20 to get a good launch but will tear your head off, a near race car that you can get around on the street but tear up the freeway or want a streetcar that rips through traffic like a sharp knife but would get beat out on the freeway by the two above...or if you would prefer something inbetween.


j