Kurgan

Looking for thoughts on a turbo for my 20B FC. I am having it backhalfed and will be running a Gforce tranny. The interior will remain intact, except for some racing seats and the necessary cage and fuel cell.

I'm looking to be ABLE to pust 9.0... not saying that I will, but I want the potential to be there.

Up until now, I was thinking of running a Garret Ballistic GT42 or GT45... are these too small? Any other suggestions? This is going to be a street driven car, so I don't want to go with a Y2K or anything super enormous like that... but I will just to get the time slip. i'd prefer something that will buld boost below 5000.

I have a fully streetported and rebuilt 20B running in my FC right now. Plans are calling for the chasis work, drivetrain modifications and single turbo.

Would a GT45 work, or am I looking at stepping up to something like a Thumper-88?

Thanks,
Crazy Nick

Mercury

Do a tri turbo setup... I know you want to. =']
<just kidding>

I know that magnus says the the GT42 spools up quick on a 13B so it would spool up even faster on a 20B... Could someone tell us if the 20B would out flow it...

-M

RETed

The 20B will outflow it.


-Ted

fdracer

whoa you're gonna run a backhalved car on the street?

Kurgan

Damn straight, Skippy

I know the 42 is too small... any other thoughts? Ted... what do you think? (not about me )

turbostreetfighter

Kurgan, your best bet would be with a twin setup, Abel and Siguel ( and me) are using them and it is the only way you can get enough power and still spool decent. you would need a thumper to make enough power to put a 2600lb car in the eights and that turbo is NOT going to be worth a **** on the street especially with a gforce and no NOS, if you were running an auto with trans brake you MAY be able to do it. i will tell you now that if you build this car the way you say you are you will not ever drive it on the street!! it is just not worth the trouble. once you start getting in to the low 9's high eights it is no longer a turnkey car remember all of the NHRA legal stuff you are going to have to have on the car!! that alone makes it a bitch to drive in the parking lot alone...imagine trying to turn corners in a car with no sway bars and huge rear tires. just my opinion dont take it to heart!

MWW

turbostreetfighter

oh yeah i forgot, anything over 150 mph has to have a parachute on it and you will need wheelie bars too!! look at my avatar and imagine trying to drive it around the streets!!


MWW

93 R1

What?

Thats not your daily driver?

AJC13B

I think you will need to draw a line in the sand and figure out what you want. A street car or a drag car, you can't have both and have the car do the best it can do.

Personally, I think the mid to high 9 second region is the most you can get out of a regularly driven street/drag car yet still maintain some form of reliability and streetability.

As for the turbo, the Garrett GT45 will be spot on.

Kurgan

The thing is, I AM building a street car and I will be driving it on the street. I want it to be able to turn 9s, but with nitrous, 8s should NOT be out of the question. So, I guess my goal is to have a 9 second street car, which I see as VERY feasible with my plan, and for it to have the potential to be in the 8s with some nitrous. All of this depends, of course, on driver's ability... I just want the potential to be there... I want to rule the local tracks and not be scarred of ANYTHING on the street.

The line in the sand is that this WILL be a street car, and if I have to cut corners on the drag potential of the vehicle, I will. But I will not settle until it is a solid 9 second car... no reason NOT to build the chasis and whatnot to be certified for 8s, even if I DON'T hit them...

Like I said, POTENTIAL is the key word here

Bridgeported

How about a T-76? Rotowerks has a 3rd gen drag car with a 20B bridgeported engine and a T-76 turbo that runs high 7's. Sure it's a pro-class car, but it still shows a T-76 on a 20B can make tones of power.

What would a T-90 be like on a 20B, does anyone know?

turbostreetfighter

a 76 on gasoline will not make enough power to get that car in the eights i am sure that the race car you are talking about is running methanol which changes the effeciency of the turbo. FYI the AEBS focus is only using a T72 and runs low 7's with 50 psi of boost, there is also a Carolla that runs a T66 and runs 8.0's at 160+ mph!! i am tellin ya twins are the way to go ESPECIALLY if you even think about driving it on the street!


MWW

Kurgan

Which twins would you suggest? I was thining about dual T-66s, but I've heard that it would be too big. Maybe a couple of T04 T-63s or something to that effect...

What do you guys think a Garret GT45 would put out on a 20B?

BTW, My motor is already heavily street ported, and I won't be rebuilding this motor until it needs it. I think that it has enough flow to get me into the nines... I just need to find the right turbo for it.

The more I think about it, I think I want a solid 9 second street car that can dip into the 8s with nitrous... sound a bit more reasonable?

Well, I'll be looking forward to reading everyones replies... please do. I'm going to be out of the country for the next week. Going down to Mexico for some R&R. I'll be back on the 8th

Thanks all

turbostreetfighter

when you make a final decision to go with twins holla at me and i can help you out. i am not going to start running off numbers for nothing!!


MWW

turbostreetfighter

a solid nine second car that can dip into the eights is going to have to be at least a 9.20 car on turbo!!! there is no point in spraying the car when you can just turn up the boost!! so basically you want a 8 second 'street' car. do you have a truck and trailer at your disposal?


MWW

Node

iTrader: (1)

add 6 or 9 sprayers hooked to a small alcohol tank in the hatch and some extra pumps for the alcohol. lol

just have a EFI system that can switch between two maps. Street on 93 octane, and all out drag on alcohol.
just an idea

Kurgan

Yes I do have a truck and trailer.

I wasn't asking fo exat numbers, just any thoughts or guesses on what turbos to use.

But on second tought, I think I'd rather figure it out myself rather than follow in someone elses footsteps.

Boostn7

turbostreetfighter: How would you set the manifold for a twin turbo on 20B/3 rotor with 3 exhaust ports???

merge all three into a collector and then out to two(each turbo) ?

thanks

turbostreetfighter

yeah, that is the only way to do it in that situation, or go tri turbo :-)

Kurgan, why guess when you dont have to? it is expensive to keep reconfuguring turbos if it does not work right. i am not saying that i will not help you but i dont want to go through all of that if you are not sure you are going to do it.


MWW