well thank god I haven't installed them
basicaly what I'm getting at is if and when some thing goes wrong I want to be able to piece my car back to factory... and then roll in to dealer

 

get all your service done at another shop, not ...
once you roll in for an oil change with those parts, they will remember your car, then when you come back in for a warranty issue and they are gone, questions will be asked.
might want to ask the dealership where you do business what they allow. here in boise, they allow simple catback/intakes and I would think that front mounts and i/c piping would be ok, but I would bet that every dealer will deny an engine claim with cams/gears installed.
I view it as, if you choose to mod the car, then if it breaks down, that's the price you pay. if you put gears/cams in the car and the engine goes, you can't expect to cover it.

just my .02

 

I've got all bolt ons plus 272's/cam gears/walbro. If I were to go with the 20g, what kind of injectors am I looking at as a requirement? I would think the stockers wouldn't allow me to do anything special on pump gas with that turbo which is what I wuold be using it for. Thanks in advance.

-Mike

 

I would say 660's or 750's. Check bushurs web site, I think it lists what injectors are needed.

 

The 680's will work for pump gas and up to 23 psi of boost or so.

I ran them completely out on race gas. My car has 880's in it now, with the 20G and I am hitting up to 70% duty cycle with them.

David Buschur
www.buschurracing.com

 

680s will support however much airflow a GT3076 can throw its way, either on race gas or pump. You just need to make sure you are controlling them properly.

shiv

 

Well if that's the case then the 20g-8 must be making a lot more power than the 3076. On race gas over 25 psi of boost the 680's in my RS were running at 125% and the AFR's were lean to prove it.

David Buschur
www.buschurracing.com

 

Can't this stay in your big argument thread with Al and Buschur? When taking a dig at another tuner takes precedent over making sure a customer gets the right part for what they're doing, that strikes a nerve with me.

Pushing the airflow required to max 680's on a 3076R would put the turbo out of it's high efficiency range, but people do it and it is certainly possible. It would be in some members' best interest to go larger than 680cc injectors with a 3076R so they don't hit overly high duty cycles or max the injectors out.


Back on topic...
The stock 16g is a great turbo, but if you want a bit more flow I'd either pick up a takeoff Evo IX 20g for relatively cheap, or if you want a bit more power, the 3076R is a great choice. As the gentleman from Full Race already explained the 50 trim still uses old technology despite the new optional BB CHRA's. It simply can't compete with GT series turbos in terms of efficiency. I agree that any dyno charts showing a 50 trim outperforming the 3076R would not be apples to apples comparisons.

The 3040R goes into another realm really and is too different in terms of boost response and flow to compare with the other ones.

-Mike

 

with what kind of fuel pressure??

we've maxed out 750cc injectors on this turbo, then we went to 1000cc injectors

One our test car (1.8L Honda) we are at 560 with 420 tq at 32 psi. With base fuel pressure set at 55-58 psi, and using a single in-tank high pressure 255 with 1000cc injectors, we are at 82% duty cycle.

 

Inn-tune and Full Race, you guys better stop agreeing with me!!! It is going to make you look bad with Shiv! haha

David Buschur
www.buschurracing.com

 

Are you running an AEM? If so, I suspect that is why you need larger injectors than those who are running stock injector drivers. With 680cc injectors, we can support up to 500whp on AWD Dynojets and 420-430whp on DD/Mustang dynos (30psi, race gas). It's been done several times.

shiv

 

Hi Jeff,

We run the standard 3bar FPR. Nothing fancy. But with the stock ECU injector drivers. Even with the TEC-3 on my WRX, I'm always amazed on how greedy some stand alones are when it comes to injector sizing.

Shiv

 

I have no interest in getting between you two, but what does that have to do with 680cc injectors being enough for ANY setup using a GT30R as you said a few moments ago? They simply will not flow enough to match the air that turbo is capable of moving on the right setup.

 

Are you turning up the fuel pressure? I'm hitting high mid 90% DC at 21-22 psi on a WR turbo with AFRs in the low 11s using a UTEC and 660s. I'm sure I'm easily under 400 whp. And while I'm using a UTEC, I'm currently using MAF-offset fueling, so not using the UTEC standalone fueling feature.

 

I know nothing about FPRs for the Evo. What is "the standard 3bar FPR"? Is that the stocker?