I currently have 333whp, you guys installed my cams and stuff. This ammount of HP is "safe" for what I use the car for (time attack, road course stuff). I would now like go from the street class to the unlimited class now. This will require more HP. I would like to be at 450-500 at the wheels. This is going to take alot of custom cooling and fabrication.

My thought is to go with your 2.3l and a mid sized turbo for quick spool. The hard part is keeping the motor / parts together for 20 min's at a time full boost.

I'm very happy with TT's work and would love you guys to come up with some type of plan for me.

Thanks,
Kyle

 

it going to take a lot more than just big WHP for Unlimited class. Suspensions, tires, etc.

 

2.3 and a 50 trim should do it.....just run race gas and you should be fine........i would think..........

 

Already working with APR on the widebody kit....

 

I keep hearing about this "50 trim" not sure what it is?

I"m more of the suspension guy... I need to do my HW on turbo's

 

Offtopic, but damn thats some nice cars you got in the stable

 

I personally am hoping to go this same route, and I would choose a 2.3l stroker with BB 50-trim running alky (or race gas) with a conservative tune. That should be good for 450whp/450wtq without much loss in spool over the stock turbo thanks to the stroker. I believe this would be a great power level that is still reliable for daily driving AND 20-mins of racing. Getting to 500whp and beyond starts to make things difficult.

 

Cool... i'm thinkin this might be the way to go. Now what is a 50 trim?

 

I think its a t3/t4

 

Precision uses race bred 360 degree center thrust bearings and a cast turbine housing that allows for the use of garrett style center sections. Combine this with your choice of a .48 or .63 A/R Turbine Housing and you'll have an awesome turbocharger setup!

This turbo is a GREAT street turbo that absolutely loves pump gas. For close to 8 years now DSMer's have been proving over and over, a T3 style 50 trim is a great all around turbocharger!

Check this site for more info on the 50 Trim

http://www.precisionturbo.net/turboc...tegory_id=3026

 

There are a few places that offer good info for 50 trim as well as other size turbo kits...

 

Is this a 50 trim

 

A 2.3L STROKER IS NOT A TIME ATTACK MOTOR!

If you want to drag race, it's absolutely the way to go. But for time attack and sustaining high revs and winding it out to 8k or more, a longer stroke is definitely not the thing to do. The piston speeds get retarded and it's a lot of stress on the whole bottom end.

A built 2.0 or MAYBE a 2.2 with the lightest rods and pistons you can find as well as a kick-*** head (Cosworth comes to mind) and a high-flow intake manifold will rock the house. TT sells the Magnus manifold if you're serious about racing. The light internals will only be good for about 600-650whp, but that's well above your goals and the reduced mass will greatly increase longevity and send throttle response through the roof and the car will rev up like lightning. Make sure to get ALL of the internals coated by someone like HPC (hpcoatings.com) and of course remove the balance shafts, and you're all done.

 

i always assumed a 2.0 would be better for drag racing cause ur launchign and keeping the revs up the whole time...and a big turbo doesnt get moving til way up in the revs....while a 2.3 will pull ya out of a tight turn faster cause of the torque and a decent size turbo for a quick spool......

 

The problem with a 2.3 is piston speeds. They are approaching F1 ranges.

100mm stroke * 8000rpm * 2 strokes per rpm = 1,600,000 mm/min = 60mph

(the piston goes from top to bottom and back in 1 revolution, so 8000rpm = 16,000 strokes)

60 mph may not sound like a lot, until you consider that it has to do it in .0000625 seconds! F1 cars have about half the stroke, but double the rpm's so it works out about the same.

With an 88mm stroke, the piston speed drops to 52mph, which may not sound like a lot, but at these multiples, it is considerably less stress on the motor.