G's 3rd Gen

iTrader: (11)

AHHAHAA!! That video is a teaser isnt it! Good luck w/ your switch. Maybe next year I'll do the same..

matty

yeah i know...we both have good running twin cars...is a shame to do this....but what i have been saying is the truth. the cars now adays are nuts outthere. the twins cant keep up anymore. all my buddies friggen get trans am or z06 and slap n20 on it and its game over. not anymore! going 22psi baby....and if that doesnt work....the t-78 has room for more!


but none the less its hard to take a good running car that traps 118mph and throw 10k at it in the hope that its 1) faster and 2) as or close to as reliable.

matty

jeeeze eveyrone pm;ing me telling me t-78 is no good. to go with 500r or soemthing with more modern design. is this the consensus?

Zero R

iTrader: (1)

We got 503whp@21lbs the compressor itself will support up to 75lbs/min 69% eff. With the right tune and build the turbo should support mid 500's. We haven't run it any higher than 21lbs. As for response it responds the same as a 35R so you are hitting a bar of boost by 33-3500rpm.

-S-

Broken09

iTrader: (1)

My 500R made 466 at around 17psi and 503 at just over 20 with a rich tune. It's great for the street as it responds well but still has enough power to pull to redline.

A3ON7

Zero R can you scan the dyno chart for the car that you have installed with 500R turbo.

Zero R

iTrader: (1)

I'll see if I can get one on here. I don't think I have it on the computer anymore. I know there is one run on wargasms dyno comparison page.


-S-

A3ON7

ok, you have the weblink to it?

KeloidJonesJr.

iTrader: (8)

matty

seems to me that the t-78 makes about 30-40 more rwhp at said boost compared to the 500r. And that the t-78 probably has more power potential in case i ever want to up the boost even more. however the 500r will spool 1k rpms sooner which would make it more fun to drive on the road. tough decision. Would be great if some more members that have been running singles could chime in on this? damn this is gonna drive me nuts now!

A3ON7

lol...i know how you feel bro, that's why i've been asking Zero R to scan some dyno chart of 500R turbo and T-78.

I'm also considering to go into single. But i'm going to start my project this coming sept or oct. learning as much of it as possible now so that i would when that time comes i know what i'm going to do.

BLitzed33

The T78 is older technology, but it is a proven turbo. If I upgrade, I am going with a GT42R. I believe he was talking about a the cost of a reman motor and then taking it apart and porting it and putting it back together, install, etc...You will have to verify with him in more detail.

dhahlen

iTrader: (5)

Screw it... put a GT45r (yes 45r) and deal with the lag... and when the boost comes on and you crap your pants (after your nice nap because of the lag) lemme know what you think, lol.

T78 isn't a true 78mm turbo, this has been addressed several times. The 42r is a monster.. and spools relatively quickly for it's size.

I agree, the T78 vs 500r are two tough decesions... but I'm all about the lag.. and monster power. =)

matty

no the cost was the same. Its roughly 5k to buy a reman, port, and install it. It is also roughly 5k to to use my stock motor which i belieive is good core (traps 118mph on stock twins, 50k miles), rebuild where necessary, port it, and install.

Does that make sense or am i confused. i was thinking that if my motor is good it would only cost 2k max to pull it out port it and re-install it. the difference of 3k would be the cost of a reman which i wouldnt need.

matty

as it stands right now i am completely confused on which to buy. it seems clear that the t-78 makes more power. But A-spec makes a great arguement on their website in regards to a quick spooling turbo " We promise with this turbo kit your RX-7 will still stay "fun to drive" like it was meant to be!" so true...for me thats what makes an rx7 so great....how fun the car is to drive. in my opinion no other car drives like a 7...that why i have driven them for over 15yrs..my sequential twin rx7 is so fun to drive...i dont want to ruin that by going laggy turbo. Do i keep posting the same things over and over...i am sorry...this is tough.

it seems like lag is easily addresssed by downshifting. its really tough to make a $10k decision like this w/o ever haven driven a single turbo rx7.

i will tell u this....when i do this swap and if it doesnt make over 500rwhp on c16....i aint picking it up till it does. lol. And so far to me is seems like the 500r will be struggl;ing to get there.

another thing i noticed lately is that alot of shops are going with smic;s with these turbos. i def thought a fmic was a no brainer when goign with a big turbo.

Really appreciate all the feed back thus far guys.

Zero R

iTrader: (1)

Ray will build you a solid motor. A solid motor will run you around that price. That is what I think some people overlook certain things will cost a certain amount. I would rather pay 5K to a proven well known builder who is familiar with your power level than to someone who offers a "great price." Numerous people on here try going cheaper first and it always cost more in the long run. Kinda a ghetto way of financing if you ask me. A 42R setup is nice and spool will be good when you consider it's size and power level. It sucks trying to choose between power and lag. The best way to start adressing that problem is ask yourself where 80% of your driving experience will be then go from there. There is no doubt the T78 has more "potential" but again it is not near as fun a car to move around town in. If I had to choose for big power I would be looking at a 42R over the T78. More power and better response. But that is far from a squirt around twon car.



-S-

dhahlen

iTrader: (5)

Yeah... he hit the nail on the head.

Highway/Drag or Town/Track

My car is a highway queen.. (i'm not calling it a drag queen) - I putt putt around town, and i don't mind.. since traffic in socal sucks *** anyway.

The 500R would be badass for town and the track.. it's a sweet turbo. It will also perform well in the 1/4 mile.. it has a large powerband.

matty

i rembeer watching vid of a gt35 40 racing a cobra and absolutely murdering it. then a t-78 raced it. it did beat it but not nearly as bad. i dont remeber the psi each were running but it was pretty clear which car was fatser...i think the rx7s were xaviers and nocabs. i could be wrong.

BLitzed33

I know of a customer of rays who made 526 whp on a T78 on C16 but I dont remember how much boost, I know it wasnt over 25 lbs. The GT42R is the best compromise of big power and decent spool. I believe Ernie car made full boost at around 4900K (30 lbs). You have to consider the lag vs big power and compromise. Also, do you plan on running on pump gas, mix, methanol injection, or straight C16? Just figure out what power levels you will be running the most, and not choose a turbo just for numbers. Like sean said, you want a turbo to give you fun response on the street, but capable of giving you more when needed. Anything with over 400 whp is more than enough for street fun for most people, so either turbo seems a good choice.

matty

i will run a low bost setting of 15-16psi 95% of the time...then a high boost setting of 20-24psi on straight c16. not sure why guys are so hessitant about running race gas. is there somehitn that i am not getting in regards to that? on high boost i need 500plus

BLitzed33

I run C16 all the time, I keep a drum in my garage. I run 20 lbs low boost and 25-26 high. Another reason is because of the chance of getting a bad tank of gas, which I have seen more than once and that I hardly drive the car anyway.
So if you are running 15 lbs, then get the faster spooling turbo, which will be 95 percent of the driving you will be doing. Maybe even try a water/methanol kit and play with that. Whatever you choose, you will be happy in the end with Ray doing the work and tune.

matty

Say u are at 4k rpms in 2nd gear and u hit the gas. does it still take several thousand rpms for it to spool on a t-78? I have never been in a single turbo rx7 or any car for that matter.

i did some serious searching last few nights. I think the gt35r is alittle small for me. Especially when comparing to a t-78. Jason had some negative comments on the power that he has seen out of that sized turbo. I would think that guy has seen some serious dynoing in his time as well. So i have to respect that opinion. How does the 40R look compared to 500r?

dubulup

hand down you will want a ball bearing turbo...13B-REW is already plumbed for coolant to go thru the turbo, and it will keep the FUN in the 13B.

IMO, the T-78 shouldn't even be a consideration for you.

to answer your question, 2nd gear with a single @ 4k...you hit the throttle, HANG ON! When you say spool, I take it you mean MAX boost?? hit the throttle above 4K you will most definitely go positive pressure, might not hit MAX for 1k (depending on what max is)...more air in = more air out = more air in thing...

singles run so much more efficiently than stock twins, so its hard to compare the two by boost vs rpm and how much power you will make.

charlies7

iTrader: (4)

if you have any question about the 500r email sean at aspec tuning....he'll answer all your questions. Very knowledgeable man.

matty

yeah but i also need 500plus and from what i have seen its hard to get there on a gt35r. i was seeing dynos on wargasm's site still in the 300s with 15-16psi. i would flip out if my car got 25k more rwhp at my street psi than my stock twins do.

why do u say that i shouldnt consider the t-78?