Opel GT compared to SLK 55 AMG [performance enhancement discussion]

[Getaway]

<compared> my Opel GT (BSR Tunded with Magnaflow) with the SLK 55 AMG the other day and must say the SLK 55 AMG with 360bhp had a hard time against my Opel GT - was a draw all the way we had to hit the brakes in 4th gear. Just love the performance of the BSR tune!!! Especially when you are giving some hard time for a car that is twice as expensive. Proud to be an Opel GT owner - this car kicks ass!!!

Jon

[SKY888]

good job bro!

yo, any news when BSR will have stage 2 and 3 tunes?

[fr0stb1t3]

Originally Posted by SKY888

good job bro!

yo, any news when BSR will have stage 2 and 3 tunes?

Honestly, from the turbo maps I have seen, and the information we're pulling from HPTuners now, there's very little more to be gained from the stock turbo without over-spinning it which is BAD. The motor is capable of supplying all the fuel in the world, the turbo just can't keep up.

Two solutions with different trade offs:
More power solution - BTF has a compressor wheel swap for the stock turbo. This should allow the "stock" turbo to push a good 350hp worth of air and should be under $1k
Big power solution - go with BTF's GT30 kit and probably be capable of ~450whp. Your spool time will be slower and it will run you ~$3k.


Congrats on keeping up. I'm assuming this was on a closed course though right

[bun1t]

Originally Posted by fr0stb1t3

The motor is capable of supplying all the fuel in the world,

Orly? Any idea hp wise when the fuel system will run out of room? I have my eye on the BTF kit, just waiting for a tune for an 08 to go with it.

[SKY888]

Originally Posted by fr0stb1t3

More power solution - BTF has a compressor wheel swap for the stock turbo. This should allow the "stock" turbo to push a good 350hp worth of air and should be under $1k

bro, can u send me the link of this?

this is a complete bolt on to the stock turbo right?

[fr0stb1t3]

Originally Posted by bun1t

Orly? Any idea hp wise when the fuel system will run out of room? I have my eye on the BTF kit, just waiting for a tune for an 08 to go with it.

BTF is running over 450hp at ~30% injector duty cycle. It will support big freakin' power

Originally Posted by SKY888

bro, can u send me the link of this?

this is a complete bolt on to the stock turbo right?

Stock turbo Compressor upgrade - Page 3 - Pontiac Solstice Forum

You send him your turbo, he machines it and puts a bigger wheel in for more power. The big thing with the BSR tunes etc is that the turbo is holding you back HARD after the factory redline to 7000rpm. This wheel should breathe all the way to 7k, so you'll still be making power up top.

[Booster_RL]

Originally Posted by Getaway

Raced my Opel GT (BSR Tunded with Magnaflow) with the SLK 55 AMG the other day and must say the SLK 55 AMG with 360bhp had a hard time against my Opel GT - was a draw all the way we had to hit the brakes in 4th gear.

*looks around for Cerberus & ducks*

Damn... that is rather impressive to say the least. I always think it probably stings so much more to get smoked by a US $30K car in a US $65K car. I'm certain he was rather surprised by your output.

Great link to that mod too, this is going to have me up nights, I can't lie. Warranty is important to me but just doing a swap on stock turbo internals... *wrings hands* Gonna have to put some real thought into this one.

[SKY888]

Originally Posted by fr0stb1t3

BTF is running over 450hp at ~30% injector duty cycle. It will support big freakin' power



Stock turbo Compressor upgrade - Page 3 - Pontiac Solstice Forum

You send him your turbo, he machines it and puts a bigger wheel in for more power. The big thing with the BSR tunes etc is that the turbo is holding you back HARD after the factory redline to 7000rpm. This wheel should breathe all the way to 7k, so you'll still be making power up top.

I am just concerned about the compatibility issues between this bigger wheel and the bsr tune though...

BTF is not sure too. If you ask BSR, they will just tell you, BSR is only compatible with stock.

[fr0stb1t3]

Originally Posted by SKY888

I am just concerned about the compatibility issues between this bigger wheel and the bsr tune though...

BTF is not sure too. If you ask BSR, they will just tell you, BSR is only compatible with stock.

The BSR will be fine, even the stock tune would handle this turbo fine. It's only a few lb/min more turbo. The stock tune actually handled the GT30r too.

BTW, so everyone knows, the stuck clutch gives at 450hp. It can't handle it.

Originally Posted by Booster_RL

*looks around for Cerberus & ducks*

Damn... that is rather impressive to say the least. I always think it probably stings so much more to get smoked by a US $30K car in a US $65K car. I'm certain he was rather surprised by your output.

Great link to that mod too, this is going to have me up nights, I can't lie. Warranty is important to me but just doing a swap on stock turbo internals... *wrings hands* Gonna have to put some real thought into this one.

Especially since we have HPTuners now

[Getaway]

Originally Posted by SKY888

good job bro!

yo, any news when BSR will have stage 2 and 3 tunes?

Not sure if it ever will hit the market - demand is still very low at the moment. The guy that installed the stage 1 tune on my car told th



































at the tune was still under R&D. BSR got one for street driving and apperantly it should be insane - another turbo set-up and so on. Let's just hope we get a chance to enjoy the same pleasure as well.

[bun1t]

Originally Posted by fr0stb1t3

You send him your turbo, he machines it and puts a bigger wheel in for more power. The big thing with the BSR tunes etc is that the turbo is holding you back HARD after the factory redline to 7000rpm. This wheel should breathe all the way to 7k, so you'll still be making power up top.

Lol @ $800+ for a simple compressor wheel upgrade which will still have a restrictive exhaust side. You can buy a nice sized Turbonetics for less than that.

I wish they would hurry up on the 08 tunes. Thats the only thing holding me up on having 400whp.

[fr0stb1t3]

Originally Posted by bun1t

Lol @ $800+ for a simple compressor wheel upgrade which will still have a restrictive exhaust side. You can buy a nice sized Turbonetics for less than that.

I wish they would hurry up on the 08 tunes. Thats the only thing holding me up on having 400whp.

The turbonetics doesn't look the same as the factory one when the dealership pops the hood, and doesn't bolt on to factory piping etc. Everything said and done you'll spend quite a bit more on it.

Tune it yourself. HPTuners now has all the options you need.

[cerberus]

The turbo and performance discussion is good. Let's stick to that. I've redacted the "r" word in the O/P.

[bun1t]

Originally Posted by fr0stb1t3

The turbonetics doesn't look the same as the factory one when the dealership pops the hood, and doesn't bolt on to factory piping etc. Everything said and done you'll spend quite a bit more on it.

Tune it yourself. HPTuners now has all the options you need.

Talking hardware only, I'm sure I could get an adaptor for the manifold and a downpipe made and still be around $800ish. Actually, maybe I'll do that instead of buying a kit, I'll have to look into that. As for the compressor upgrade, you're better off pulling your turbo and letting a local turbo shop put a bigger wheel in for you. I'm pretty sure it would be well under $800.

AFAIK, Wester is the only one that has cracked the code for raising the rev limit and I don't believe the 08 tune he sells can do that.

[fr0stb1t3]

Originally Posted by bun1t

Talking hardware only, I'm sure I could get an adaptor for the manifold and a downpipe made and still be around $800ish. Actually, maybe I'll do that instead of buying a kit, I'll have to look into that. As for the compressor upgrade, you're better off pulling your turbo and letting a local turbo shop put a bigger wheel in for you. I'm pretty sure it would be well under $800.

AFAIK, Wester is the only one that has cracked the code for raising the rev limit and I don't believe the 08 tune he sells can do that.

In the last 2 weeks HPTuners finally put resources on the LNF. You can tune boost pressure, rev limiter's, fuel tables...

[bun1t]

Originally Posted by fr0stb1t3

In the last 2 weeks HPTuners finally put resources on the LNF. You can tune boost pressure, rev limiter's, fuel tables...

Oh snap! Turbo shopping time.... I'm about to void my warranty at 2k miles, lol.

[bun1t]

Ugh, I just went through about 20 pages on the Solstice forum. Apparently they are still having some tuning issues with big turbos. It seems as though the ECU is pretty difficult to tune and more than likely over my head. I would rather wait awhile to let the tunes get perfected than have a brand new $30k paperweight while they figure it out. Maybe I'll just throw a n20 kit on for now...

[SKY888]

Originally Posted by bun1t

Ugh, I just went through about 20 pages on the Solstice forum. Apparently they are still having some tuning issues with big turbos. It seems as though the ECU is pretty difficult to tune and more than likely over my head. I would rather wait awhile to let the tunes get perfected than have a brand new $30k paperweight while they figure it out. Maybe I'll just throw a n20 kit on for now...

i did the same thing about 3 days ago. they haven't perfected the tune yet, unfortunately ...

[RedSkyWV]

The tune is getting a lot closer, a lot more is possible (safely) than before. Nitrous is dough with the direct injection, I suppose it's possible but I'm not going to be the one to figure that out...