Hi,

As I'm new to the forum please accept my apologies for probably asking something that's been discussed already. I tried to search but couldn't find 100 % sure answer.

I'm trying to reach 500 hp mark with the following mods:

1000/2200 cc injectors
E85 conversion OR methanol/water + pump gas (98 octane RON here in Finland)
Large street port OR half bridge port (it's going to be driven on the road so I need to think carefully if I should go for the HB porting)
All the supporting mods (intercooling, fuel pumps and lines etc.)

But the main question is that I could get a Garrett GT35R aka GT3582R (ar 1.06 hotside) but will it take me over the 500 hp mark or should I go for Precision PT6266 or PT6466 instead? I'm looking for a good power band where there's useful power already at around 3000-3500 rpm.

 

500rwhp or BHP? I've never seen more than 470rwhp out of a standard GT3582R( race gas, 29psi). Our TD61( P trim GT3582R), or TDX61 ( P trim GTX3582R) can do that power level with a wide torque curve.

I have attached a dyno sheet of the standard TD61.

Turbo Kits, Manifolds & Turbos - Turblown Engineering

We are currently phasing out the standard TD61, and hopefully dropping the price considerably on the TDX61 with our own billet compressor wheel. The wheels are in testing this week...

 

Well. I don't want to flame or start a war, but it seems that cars dynoed in the States making 500 WHP make around 500 BHP when brought to Finland. Don't know why.

So, 500 bhp will do Of course I'm not going to complain if the dyno sheet says 500 whp but bhp will do. That would be around 440-470 whp?

 

i suggest you take a closer look at the rotary single turbo dyno sheet.

the typical 500 rwhp sheet will show around 75 to 125 rwhp between 3000 and 3500. we don't run our motors in that range while racing. i shoot for 400 rwhp at 5500 when i think mid-range power. OTOH, our motors make good power at 8500...

as to cars dynoed in Finland after having been dynoed in the US... exactly how many FDs are in your sample?

i was under the impression that you generally use the DIN correction factor in Europe. we use SAE.

one of my runs registered 513.88 SAE rwhp and would have produced 526.62 DIN so you are upside down to start with.

re your larger question, as Turblown correctly states, the GT35 would be off the end of it's compressor map at 500. maybe it could be done w alot of tricks perhaps but you would be way overstressing the turbo which isn't a good business plan.

BTW, the last, repeat last, thing you want if you are looking for midrange (5000-5500) power is a bridgeport. the overlap trades lower end power for higher rpm power.

i think you would be very happy w a GT35 variant even though you wouldn't quite see 500 or you could step up to a midrange turbo and would not be unhappy w the spool. a properly built rotary loves RPM and you will find yourself mostly living in that neighborhood.

good luck Elliot w the billet mod. that might just be the killer package. great idea.

howard

 

What type of manifold are you running with the gt35?

 

I would look into a TO4Z or hold out for Elliot's new setup.

Believe me, 500 is just a number. Many many things play a role when looking for the magic number. Ambient temps, dyno used, engine health, and most of all TUNING.

I made my Sig power this past year using a standard T3 35R @23psi and the thing is an animal. Break's my 285's loose at 60mph in 3rd. For a road car, look for a well matched turbo that can generate a useable torque curve and continue to pull up top. I feel you are on the right track with a midframe setup, but don't get too hung up on a specific number.

 

Howard and Elliott covered the related issues rather well.

I would personally use an S363 or S362 billet for your power goal. They have both the turbine and compressor to support your power goal safely, without being budget breakers.

 

I'll take a look at the sheets. I used to drive an Impreza and I might be a bit off with the 'mid range' If the engine will rev up to 8,5k then there's no problem. I just don't want a car that's pulling only on the last 1-2krpm.

Please, let's not start with this one. I wasn't referring to FD's but in generally. The cars seem to have more power in States than the cars in Europe with the same mods. But as stated later, dyno sheet results depend on so many things. I'm aiming for the 500 hp mark at the crankshaft. So GT35R should take me there with supporting mods? WHP will then be something that begins with 4.

This is good to know. So no bridgeporting. However it has the sexy sound...

Yep, the 500 is just a figure. But there has to be goals and I've set up one. If I can't get to the goal, there's more to do. This is a hobby and I'm not taking it too seriously Just wanted to know if it's even physically possible to reach the 500 bhp with the turbo. If yes, I'll buy it, if not I'll go for something else. Right now it seems possible to reach the 500 bhp with the GT35.

Thanks!

 

Agree with what you say regarding the american figures and the figures messured somhere alse in the world :-)

500 horses measured with DIN70020 method are possible with GT35R on 13REW engine. Search for my name on this forum for more information.

Best REgards,

 

yes, 35r will work great for these goals.

 

Thanks guys! I'll buy the Garrett from my friend then

And please, don't start arguing about the American vs European horsepower. There are so many variables that you will not get the same figures from a same engine at the same dyno on different days... At least, I won't go on with this subject anymore. I'll concentrate on getting the 500 hp out of my FD.

Took a couple of dark pictures as it's still standing in the snow on my parking lot Going to move it to my garage in the evening

Thanks Iwan. Will make the search!