sxracerb25

iTrader: (6)

I'm looking at doing a turbo in the near future and I'm trying to figure out the best way to go about it. I would like ~1000 rwhp on race gas and about 700-800 on 91 Octane for street. I have a LQ4 that I'm trying to decide between going with a 370 or a 408. It's also a 6 speed car and I plan to keep it that way. I am mainly trying to decide because I got a good deal on a turbo kit but it has a T4 flange. I'm afraid going to a 408 the T4 would choke the turbo. I've been looking at the GT-88's and they seem pretty impressive and seem like it'd hit my goal but would the T4 version hit my power goals? Would I need to goto a GT-91? I know some people will say search, but I've looked around a lot and I've seen a lot of information about the GT-88 with a T6 but not much with the T4. I currently have CNC L92 heads but I'll likely be swapping them out after reading about pushing water because of the low deck height. Any help would be appreciated, thanks

9sectruck

iTrader: (9)

I would stay with the stock stroke my .02
I have been talking to mighty mouse on here and I think im going with the same turbo he is using gt91 but with a 370 instead of the 408

sxracerb25

iTrader: (6)

Is he running a t4 or t6 flange Turbo?

9sectruck

iTrader: (9)

I pretty sure its the t6
thats what I will be using

sxracerb25

iTrader: (6)

I'm wanting to try to stay with a t4 but I'm not sure if that's feasible for my power goals

DrTurbo

iTrader: (3)

I would go GT91 T4. Big motor and if you want big power at low boost, go bigger on the comp wheel.

Verz

iTrader: (21)

The h/c/I 6.0 just not cutting it anymore huh haha. For your power goals and turbo choice im not sure on t6 but if you want to stay t4 id think a couple t70s or similar would get you there as well. On a side note if the heads yous have now are getting changed out keep me in mind :thumbs:

sxracerb25

iTrader: (6)

Yea, I think the gt91 with 97mm turbine would be what I go with. So you think a 408 with that turbo in a t4 will hit my goals? The 408 won't flow too much for a t4 flange? Thanks for the advice.

Verz, yea getting bored with the h/c setup. I'm definitely going to an aftermarket casting when I do this so I'll let you know when I go to sell the heads. Is your car running? Haven't heard anything about it in a long time lol

9sectruck

iTrader: (9)

thats the turbo tha might mouse has but pretty sure a t6
Im really new to the turbo scene, but will the t4 be better for a 370 on the street for spool up?

Verz

iTrader: (21)

From what ive read(thread here) a 370 would be a better choice for longevity reasons and think itd be more suited for the t4 flange you want to use.

My formula kind of ate itself back in may on the way to SRE so parted it out, paid off some bills and now working on a hoopty 82 regal I picked up and going to convert that

sxracerb25

iTrader: (6)

Putting the 6.0 in the regal? That should be pretty fun. Is your 6.0 running and all good? I'd be willing to trade + cash on your end. I'll need different heads and can and I'm building the bottom end so I may just try to sell my engine complete.

After doing some reading I think I'm gonna go 370. Now I just need to research what heads to go with.