I have the twins running nonsequencial and getting tired of the lag, just want to know of a good safe single turbo I can run on about 14 lbs of boost

 

https://www.rx7club.com/time-slips-d...-dyno-1039027/

 

If you wanna get rid of the lag, go back to sequential. A set of sequential BNRs can get you around 350hp safely on 91 octane.

 

Properly setup single turbos don't have much lag...

I have attached the response from our TDX61R turbo kit( which has been replicated over and over again).

 

That Adaptronic ECU is a thing of beauty. After reading Turblown's links, suddenly my PFC seems so dated.

If I didn't have to worry about appearing stock for the smog guy..... lol, I'd be broker than I already am!

 

Going sequential would require so much tuning and more vacuum, it's not worth it really my 13brew is swapped into my fc lol but I think I'm going with a holeset hx40

 

im dynoing my td 61 on monday on my s5 at 18-21 psi. hoping for mid 400s with denso pump. 720/1680 and AI

 

I am using Turblown's TD61R 1.15 a/r (without the X wheel).

I made 412whp @ 14psi. and spool is very fast.

A lot of this is attributed to a 4" DP, twin scroll manifold, and short intercooler piping (vmount).

 

i'm a firm believer that if you can get by with less and make more then it is better.

a GT3582R T4 1.02AR twin scroll should do about 450whp @14psi without much lag at all.

 

I think that is pretty optimistic for a standard 35R. But, I always seem to dyno in 90 degree weather. Many variables as we know.

 

i suppose, yet i have gotten those numbers fairly consistently.

 

Agreed. I think typical output of a gt35r at 15 psi with mild street port is closer to 400. 450 is certainly attainable but definitely not the norm at that boost level. Some dynos are more optimistic than others too.

 

what do you guys think about T04R?

 

3582

 

"I have the twins running non-sequential and getting tired of the lag, just want to know of a good safe single turbo I can run on about 14 lbs of boost"

most of the OE turbosystem craters because of the unfortunate manifold design, not because of the size of the turbo wheels.

the total OE compressor area is 5.972 sq inches. a GT35 is 6.386. only 6.9% larger.

further the OE turbine area is 5.25 v the GT35 at 5.171.

done properly, any single conversion is a significant upgrade not only in performance but also in helping extract damaging heat from our engines.

improved performance, improved reliability

win win

the OP is clearly looking for a MODEST upgrade.

as such he should go w any of the GT35 sized turbos.

given modest boost levels and a desire to stay in the lower hp range i think a cast compressor wheel turbo would be the best fit.

i see three options....

the garden variety GT3582r

a GT3582r hybrid w either a journal bearing or ball bearing setup w a P trim hotside

the BW GT35 variant...

the compressor on all three is tailor made for your power objectives.

the primary area of difference is in the size of the turbine wheel.

the stock GT35 has a 5.171 sq inch wheel

the GT35 hybrid has a 5.89 inch turbine wheel

the BW has a 6.35 sq inch wheel

more wheel area generally means a happier engine as heat is more easily passed out the exhaust.

all 3 turbos are a solid option for you and will deliver what you are looking for.

do not concern yourself w lag. yes, the single turbo will put out a touch less at 2000 rpm but it will deliver a linear solid more powerful punch up the rpm band a thousand or so and you will be grinning all the way. our motors were designed to rev a bit.... i am not talking running around at 8000 rpm, just a bit more than the oe setup.

"Properly setup single turbos don't have much lag..."

word.

"I think typical output of a gt35r at 15 psi with mild street port is closer to 400. 450 is certainly attainable but definitely not the norm at that boost level. Some dynos are more optimistic than others too."

yup

"what do you guys think about T04R?"

it is 2013 and there are lots of mid size (7 sq inch compressors/550 hp) turbo options now available that weren't when the TO4Z hybrid came out... there is nothing wrong w the turbo but it suffers from a smallish hotside and i personally do not like the 63 trim. being a mid size turbo, it is, of course, not a rational choice for the OP.

howard

 

Howard I really enjoy reading your posts. I am trying to achieve simular power levels 400-450 on 93 octane.

What is your opinion of the Turblown TDX61? I read great things about it, but have not heard you elaborate on it.

I did a quick search for a post from you which included Turblown TDX61 and didn't find much.

 

I too have liked Howards posts for years now, I'm curious why Howard left out the 66mm turbine as a option, it is a better option than the older P-trim wheel. 3574(35R variant), TO4Z, TDX all run the older P-trim wheel. It's why I stopped recommending my own 3574's and 500R's when people call, It's not that they didn't perform it's just why offer/pay more or even the same for a older not as efficient turbine. I'm also confused why the P-trim would be fine for the 3574/TD or other 35R variants but not good for the TO4Z?

~S~

 

Sean, what are you recommending now as a replacement?

 

A 62/66 is a solid replacement for the older 3574(61/65) while the 3574 is a excellent well rounded turbo with a broad power band, it still uses the 35R cast compressor wheel. That wheel tends to fall off efficiency wise around 18psi for 13B's. They can be pushed higher but with diminishing returns. The older P-trim wheel is a great wheel and performs well on a rotary and we've tried varying degrees of clips over the years to see what more we could do with it. That said it is not as efficient as the 66mm turbine. When you compare the fact that people can efficiently run a CEA 62 comp to 35psi comfortably and the 66mm turbine will conservatively outflow a P-trim by 25whp with no real loss in response why would I try and sell you a 3574? Cheaper? Not really. So if its not really a cost savings and it has a much larger performance envelope, why would I not pass that value on to the customer?

The same can be said for the 500R we've ran 67/66's here on the dyno up to 48psi making 1040awhp and the turbo wasn't complaining. You could never expect that out of a older 500R. (SMG944 is showing what it will do) the 64/66 offers significantly better response and pretty much the same power as the 67/66. So I try and offer those where I can. I've thought about putting aftermarket billet wheels on Garrett CHRA's years ago and I can get them in any size shape trim flavor I want and I still may for certain customer, but it's hard to make that move when I know at this point I would be limited turbine wise and the cost versus value might not be there. It is one of the main reasons I never sold the 500R separately from the kit. I could absorb the turbo cost into the kit but selling it as a stand alone unit meant you would pay more for something and would likely have a better performing option at that higher price.

I like Garrett turbo's, I wish I could get the sizing options I want out of them, I also like Precision turbo's I wish they would just sell me parts and let me build my own stuff. They do help where they can. I've sold a few 58/66's which aren't readily available for street guys just wanting a simple clean but responsive car with HP a second concern and for the most part those people loved them.

~S~

 

Good to see you're still around Sean btw checked it the other day and your website didn't work?

 

I was just going to actually email you and check up on your car and see how it goes. It's up I had/having a issue with Godaddy so I redirected it to another domain I own, because my old partner registered it all I never got a email saying your site is coming due. We don't communicate and he likely doesn't even have whatever email addy he registered it to 13yrs ago where they sent notifications to, so now I'm having to jump through a bunch of crap just to hand them money and prove I'm A-spec. It's honestly dumber than dumb the conversations I've had with them about please can I just give you my money, especially since they had no problems with helping me on security issues in the past.

~S~

 

I just checked your site Sean, its a no go for me. I too am interested in the td61, I really like turblowns manifold design, Maybe that with a 62/66 would work well. decisions, decisions

 

it literally worked seconds after my post...weird

 

Ah HA!

I wont knock Elliots manifold or his turbo, there is reasons he does his stuff his way and reasons I do stuff my way neither way is a poor decision, you do have decisions to make...


~S~