00duvall

iTrader: (7)

I have a 427 dart ls shp 10 to 1 with brodix sts br7 by frankiestien. car had a 408 and a single s484 billit wheel and race cover. I think this turbo is going to be a little small.I am on the fence to either step up to a gt55 or go twins.Not much price difference in the 2 set ups. Upgrade the turbo is right at 3k and i would like to stay at 1k per turbo on the twins. Car is street driven 95% of the time.Looking to make 1000 rwhp to 1300 rwhp some were in that range. No et goals. Car is 1970 nova about 3600# jakes lvl4 th400 3:25 moser fab 9 inch. pump gas with meth but can switch to e85 to meet my goals. Car is controlled with holley dominator. I was looking at the sxe 369 turbos? I would like them to be small and meet my goals.Car is going to be a fun fast weekend car will hit lsfest or drag week this yr and a street car take over event.What turbos are easier to package? Nova dont have a whole lot of room. Thanks

scottywheels

I had a 427 last year with a class limited 88mm from Jose at Forced Inductions at 3340 lbs. On Q16 we made almost 1400 to the tire at 30 psi....

Camaro9969

iTrader: (12)

We are actually building a nova with twins and you aren't kidding about space. Giant single would be nice on there as with a 427 you are going to want at least a 94 to really utilize the turbo (if max effort anyways) but as for twins the precision 76s are badass little turbos fit very nicely up in front we were messing with the Borg/bullseye turbos for the car just the s400 frame is to large without really cutting up the car. But Scott and I had 427 Darts he made major HP with the 88 and that seems to be in your goal. I ran a 76mm with the motor and it did pretty well just way to large for a turbo in the 76-84 range from the data I saw. If twins are in the budget I say go for it if not the 88mm+ Is going to well exceed your goals

vinceI

iTrader: (5)

I have twin precision 76s on my 440. Much nicer size to work with than the bw stuff.

oscs

iTrader: (19)

My vote is the GT55 but if you go twins I'd spend the money on some 66/67 precisions. My buddies 427 9.5:1 made 1097 on 9lbs with them. Those are some small turbos and light up instantly.

00duvall

iTrader: (7)

66/67 on a 427? Is there build thread? What was the turbo set up?Everything i have seen say nothing less the twin 72? My car isnt a max effort ar just a fun street car and few track events.Whats the comparisons between turbonetics t72 precision 66/67 and precision 76.If i do a single i want it to start boost 3500 to 4 and carry to 7k.Would a gt55-94 do that or would the 91or88 work better.Also have seen promod 88,91,94 turbos would any of these work?Like i said price for single vrs twin is vary similar if i can get the twins for under 1300 a peice. I all ready have dual wastegates on my single set up.I just like the idea of 2 smaller turbos vrs a monster with a 5 inch down pipe.Turbonetics turbos look like they come in a small package?

oscs

iTrader: (19)

Sorry I don't know a lot about singles. I just see a lot of people making the GT55 and promod 88's work. I don't know who told you you can't run less than a 72mm Turbine but yes you read that right, twin BB 66/67 precision turbos on a 427. They are not cheap though. $1800 a pop. TN does offer some smaller frames turbos. I think the T-60 series can go all the way up to 72/74mm if I remember correctly. The 66/65's I had worked really well on my little 370. If you are looking for 1000/1100 I would say they are a decent cheap option.

vinceI

iTrader: (5)

Huron can get you into twin precision journal bearing turbos for a real good price. Way less that you would pay for a class legal 88 or any of the pro mod turbos.

00duvall

iTrader: (7)

Sent Huron a email already just waiting to hear back from them.

GotBoostRacing

iTrader: (1)

I don't have good numbers yet on mine, but I went with 6766 for starters on my new 427. I do question the exhaust side as a potential bottle neck. As Vince mentioned for packaging, the Precisions are much easier to package. I originally started with BW S366's on the car, and it was tough. I could send some emails with pics if you'd like.

I had the 7275's on my other 427 in a different car, and they lit off before 3500 and was an animal on the street at 10lbs. Point being, probably not an issue if you step into this size, or the 76's

What rockers did you end up with on your heads?

Corey

00duvall

iTrader: (7)

Sent u a with email address. Were those percision 72/75? Would i need to get the billit wheel with them or just plan jane 76.was trying find pics of the percision 76 vrs tn 72,75 or 76 turbo.

oscs

iTrader: (19)

We haven't seen any issues with them and they have seen around 30psi.

a05c

That big of a motor, with any decent turbo combo, will make well north of 1000 without even trying hard.

00duvall

iTrader: (7)

I have narrowed it down to percision 7275 billit cea with 81ar or the tirbonetics in 7575 or 7275 ball bearing with 96 ar. This is a street car not a max effort race car. Thanks

00duvall

iTrader: (7)

Also throw in the comp 7275 triple ceremic ball bearing 81 ar. All three are 100 difference precision then turbonetic then comp. Cant find much on comp twin setups

a05c

I haven't seen many good things about Comp. Precision and Garrett's are tried and true.

transam69230

iTrader: (49)

Stay away from comp! Their turbine wheel design has back pressure problems!

00duvall

iTrader: (7)

K comps are out. Between the pt7275 and tn7575.

oscs

iTrader: (19)

Precision

00duvall

iTrader: (7)

K they have a entry level 7275 or 7275 cea biliit wheel? There is 500$ price difference. Is it worth the upgrade? Thanks