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Upgraded from s480 cast wheel to a precision 106 with billet wheel and ball bearing!
Okay so we finally upgraded the turbo on our race car and went with a precision 106 cea turbo with g trim wheel. Huge upgrade from our cast wheel s480 we went 5.46 at 133 and that’s all she had in her maxed out turbo. Engine is a 427lsnext dart block Brodix head and all very good crank and internals with a CSU blow thru carb. Couple questions
-what’s you’re guys guess on gains goals are 4.8x in the 1/8th
-we are running one of those cheap 1000hp cxracing a2w intercoolers car runs on c16, wondering how restrictive the intercooler is and if we’re better off ditching it completely, or going to a expensive pt1000 or something
- also the new precision 106 we got a smoking deal on brand new has a 1.50 a/r exhaust side. Do you guys think it’s going to be too big to spool up and have to switch to a 1.32 a/r or will it be fine?
Car also is a turbo 400 with trans break and 3:90 gears, ams 1000 boost controller and basically would spool the s480 as fast as I commanded it to. 1.32 60fts
You can check the boost pressure before and after the cooler and get an idea of how much if any it's holding it back. I bet you'll have no problem spooling the new turbo with your set up.
beautiful set up btw, and shame on you for no good pics of the new turbo. I think I see it hiding down in there lol
You can check the boost pressure before and after the cooler and get an idea of how much if any it's holding it back. I bet you'll have no problem spooling the new turbo with your set up.
beautiful set up btw, and shame on you for no good pics of the new turbo. I think I see it hiding down in there lol
Yea that’s what I was thinking of doing putting it on the trans brake and seeing what it makes before and after. Haha the new turbo isn’t here yet it was supposed to be delivered fed ex on Saturday that’s why I got it all ripped apart and ready then it got switched to tues delivery! 😡 I will post pics as soon as she gets here.
Your goal should be a cake walk. However you will need to make changes to the converter. If it was matched correctly for the original combination it will be too loose for the new power and probably too tight down low for spool. I'd also start with the smaller A/R. Also make sure you have enough injector. I'm not familiar with those intercoolers. I would use the better of the 2. If you have a stock geared T400 you have starting line issues especially with the 3.90 rear gear. That turbo is a huge step up from where you were..
I don’t see why the converter will need to be changed the car is still going to be launching the same with probably the same low boost 5lbs or so and it 60fts 1.27. Just going to see a lot more power down track.and yes we are thinking about just ditching the intercooler completely If boost pressures are that different before and after the cooler. I think the blow thru carb will cool the iat enough for 1/8th mile runs.
the car weighs 2900 without me in it, I weigh exactly 200lbs so 3100 with me in it, still has stock glass, only body part that’s aftermarket fiberglass is vfn hood. Doors still have window motors in them and stock rear bumper support and hatch. Depending on funds might lighten it up .
I don’t see why the converter will need to be changed the car is still going to be launching the same with probably the same low boost 5lbs or so and it 60fts 1.27. Just going to see a lot more power down track.and yes we are thinking about just ditching the intercooler completely If boost pressures are that different before and after the cooler. I think the blow thru carb will cool the iat enough for 1/8th mile runs.
The car will most definitely not be launching the same. You do realize that at the same boost level the new turbo will be flowing a ton more air? Also the transient response and spool of the new turbo will be completely different, hence different torque curve. "just going to see a lot more power down track" Which will cause it to push way through the converter that you have now if its spec'd correctly for your current combination. As well as everywhere else in the run. You will also find your starting line ratio with that trans and rear gear ratio will not be fun to hook up off of the starting line. Good luck.
I understand what you are saying now but I’m not going to go out and put all the power to it at once I’m going to inch up on it slowly and turn the boost down a ton and I will prolly take it out try it and if it blows through the converter back to circle d it will go.with the s480 1 second into the run it’s basically full boost(27lbs) And yes it took us a long time to get the car consistently launching with our gear and turbo 400. Possibly switching to glide before racing season.
Haha. Oh it will make power . Just was curious is all
oh trust me if I had the money I would have loved to use a mid frame pro mod turbo instead of this hog. But I bought it from someone who used it for a mock up never ran for $2500 couldn’t pass it up. I kinda need all the weight I can get up front already been through 2 oil pans and th400 bellhousing from doing cool expensive wheelies lol😎
I’ll have to to agree with the poster that said you’ll likely need to restall your converter. How many 4.8 cars are only 1.27 to the 60’? If you want to run high 4s, you’ll need to 60 better. And that’ll mean a converter and gearing change.
Let me guess, you launched on low boost because any more boost and it would spin? That’s a possible sign your SLR is off.
Regardless, have fun with the new power and let us know how it goes!
Yes the more people I talk to the more I hear I am going to have to re stall the converter. And yes you are correct about the low boost launches usually around 4lbs any more and you’re right the car will start to spin. I’m thinking about switching to a power glide and sending the converter back before the season starts up here in ny. I will keep you guys posted and thanks for all the help !
02-09-2019, 06:48 PM
Upgraded from s480 cast wheel to a precision 106 with billet wheel and ball bearing! 
