[bradenc27]

Well after telling myself I wouldn’t do it I’m going to cave in. About $25k into build so I said screw it might as well finish it off. Narrowed it down to 3 options and wanted some opinions if you guys had any.

1. Big boost EFR 8474 Single Turbo
2. Vargas GC
3. Kratos Krass55Bi evo

Leaning towards the big boost 8474 as I really want a single turbo. The Vargas is such a great price that it’s hard to not give it a good look. Will probably pass on Kratos but their quality and warranty is unmatched.

Not looking for crazy power. Run flex fuel and usually shoot for E50. Im running a little over 600 to the wheel now on full E85 but really want the top end to have more power.

[Track/S]

If you want power at top end the way is single turbo.

[agent_orange]

Single turbo. The sound alone is worth it.

[Commanderwiggin]

I would consider the 4N single kit to be of a much higher quality than the Big Boost, Vargas are notorious for being cheap and failing, the Kratos are overpriced and have quality issues. Not tryimg to be negative about your top 3 choices, just pointing out my viewpoint for your careful consideration.

[Simon P.]

Stock rods? 4N with the BW 8474 for single, Mosselman 65-80 for twins. I went with Kratos Evo's and have no real regrets but they were pricey and I was told by my tuner to cross my fingers and hope they hold up. Been great so far though

[bradenc27]

Originally Posted by Commanderwiggin

I would consider the 4N single kit to be of a much higher quality than the Big Boost, Vargas are notorious for being cheap and failing, the Kratos are overpriced and have quality issues. Not tryimg to be negative about your top 3 choices, just pointing out my viewpoint for your careful consideration.

That’s what I have been hearing that they make a good kit. Most likely will go with that

[bradenc27]

Originally Posted by Simon P.

Stock rods? 4N with the BW 8474 for single, Mosselman 65-80 for twins. I went with Kratos Evo's and have no real regrets but they were pricey and I was told by my tuner to cross my fingers and hope they hold up. Been great so far though

Ya. Think I’m going to go with the 4n 8474. Really want a little more power up top and the sound is a big thing for me.

[n8dgr84]

Great choice!
Looks like 4N has a bit of a waitlist...
Will you be doing anything to the clutch or drivetrain?
What's your hp goals?

[bradenc27]

Originally Posted by n8dgr84

Great choice!
Looks like 4N has a bit of a waitlist...
Will you be doing anything to the clutch or drivetrain?
What's your hp goals?

I just got my ucp, gonna install tmr. Might eventually do the cdv and ssk kit. For HP looking to get 700wheel on full E85 but will run a E50 mix most of the time. Just want to get more power with some 93 so I’m not ripping thru gas lol.

[M2C_OZ]

Single turbo ftw. I got a bigboost kit with the efr8474, PI full E at 29psi. You wont regret it

BIGBOOST SINGLE TURBO M2 COMP - POV HIGHWAY PULLS
https://youtu.be/51s5lVFzvrU

[ShortSides]

Originally Posted by M2C_OZ

Single turbo ftw. I got a bigboost kit with the efr8474, PI full E at 29psi. You wont regret it

BIGBOOST SINGLE TURBO M2 COMP - POV HIGHWAY PULLS
https://youtu.be/51s5lVFzvrU

Wish I wouldn't haven't watched that.

[M2C_OZ]

Originally Posted by ShortSides

Wish I wouldn't haven't watched that.

Lmao

[ShortSides]

Originally Posted by M2C_OZ

Lmao

Is it pretty much implied that you'll need to swap out the stock downpipe for a high flow if you upgrade your turbo?

[OG Shark]

Originally Posted by ShortSides

Is it pretty much implied that you'll need to swap out the stock downpipe for a high flow if you upgrade your turbo?

I would recommend it.

[ShortSides]

Originally Posted by OG Shark

I would recommend it.

Yeah thats what I was thinking too. So a turbo swap isn't just a turbo swap, it's a fuel pump and cat swap as well.

[OG Shark]

Originally Posted by ShortSides

Yeah thats what I was thinking too. So a turbo swap isn't just a turbo swap, it's a fuel pump and cat swap as well.

Typically yes there needs to be supporting upgrades done. What all is needed varies based on the power increase, usage, etc. Can go with something like a drop-in setup for an easy install with a nice power bump without pushing past the limit of the stock internals. Higher flowing injectors, open up the cats, good tuning is about all you need unless you track - might need a lpfp upgrade if you do to prevent lat g induced starvation. From there can go as far as you want - built motors, full fuel system upgrades, all that fun stuff.

[ShortSides]

Originally Posted by OG Shark

Typically yes there needs to be supporting upgrades done. What all is needed varies based on the power increase, usage, etc. Can go with something like a drop-in setup for an easy install with a nice power bump without pushing past the limit of the stock internals. Higher flowing injectors, open up the cats, good tuning is about all you need unless you track - might need a lpfp upgrade if you do to prevent lat g induced starvation. From there can go as far as you want - built motors, full fuel system upgrades, all that fun stuff.

Loud noises!
I think I'm just gonna spend the extra cash for a project on a wrap now lol

[Ak665]

Originally Posted by Simon P.

Stock rods? 4N with the BW 8474 for single, Mosselman 65-80 for twins. I went with Kratos Evo's and have no real regrets but they were pricey and I was told by my tuner to cross my fingers and hope they hold up. Been great so far though

Can you please tell me more about your experience with them how much did you get in 93 ??
Do you have built engine??
Are they good in daily driver ??
Do they have much lag ??
And sorry for many questions but there's no videos or many post about them

[Simon P.]

Originally Posted by Ak665

Can you please tell me more about your experience with them how much did you get in 93 ??
Do you have built engine??
Are they good in daily driver ??
Do they have much lag ??
And sorry for many questions but there's no videos or many post about them

The car makes about 575whp/600wtq on 93 which is pretty much the norm for this engine even on stock turbos with a good tune. Where these turbos shine for me is on E85.
Stock engine, FBO.
I feel bigger turbos (single or dual) wildly improves daily driving on this car. The stock turbos are so small that they are hitting max boost way too soon causing constant traction issues. Add a small amout of lag and a slower rising boost curve from a bigger/heavier compressor assembly and the car instantly becomes easier to handle IMO.
I've had no issues so far but I'm aware of some failures and was even warned by my tuner to cross my fingers if I decide to build the motor and pass the 800whp mark. I guess we'll cross that bridge when we get there.
Hope this helps.