Busted67

iTrader: (1)

Been working on my 1st gen camaro and just installed my t56. Now it's time to order a drive shaft. I was gonna order a pst aluminum one but since turbos like "load" on the engine maybe I should go steel. What do u guys think?

Set up is 5.3 with twin s360's
T56 magnum ford 9" 3.70 gear 28" tire
Ram twin disc
95% street car.

necrocannibal

iTrader: (5)

I am running a chromoly driveshaft in my turbo 408 car.

Busted67

iTrader: (1)

Are u running a stick? Any difference building boost compared to mild steel?

necrocannibal

iTrader: (5)

Yeah it is a 6 speed. I have never had a steel shaft so I can't really answer that but my car does build boost pretty quickly. Here is a video of me hitting it in second and you can see/hear how quickly boost builds.

gsteele

Why would there be differences in building boost between steel and aluminum shafts?

anarchy99

iTrader: (7)

Kind of off topic, but did you make those headers or get them somewhere? They look like just what I need for a different project.

stevieturbo

There would not.

Busted67

iTrader: (1)

Well that's the question, heavy rotating mean faster spool vs light weight less load? You could possibly think of it in terms of 4.10 gears vs 3.08.

Busted67

iTrader: (1)

Me and a friend made them.

anarchy99

iTrader: (7)

They look pretty damn good.

Busted67

iTrader: (1)

They turned out good. 1.75 down to 2" collector.

gsteele

The only reason a 4.10 gear car would not spool faster than a 3.08 car is because the tires were spinning.

Busted67

iTrader: (1)

I'm no expert but I was under the impression that a 4.10 gear = less load and less exhaust gases so it would slow the spool up.

I've been reading a lot about aluminum flywheels and driveshafts and wondering if this concept applies also.

necrocannibal

iTrader: (5)

I think it is just because the gears are so short you have to shift too early to keep it in good boost.

kingtal0n

iTrader: (1)

what you are all referencing is the rate of change of engine RPM with respect to boost vs gearing. Using a numerically higher gear ratio allows the engine rpm to increase faster. Think of spooling a turbo in 1st vs 5th. There just isn't enough time in first gear to see the "spool character" on a dyno sheet, it would look pitiful and short through 1st, some wont even reach max boost. That is one reason we like to use 4th, gives the engine plenty of time to sit and load up. So on the dyno graph it looks like the turbo spools faster, since the torque (boost) appears earlier in the RPM. If you could open the throttle all the way and hold the engine RPM still until the boost was there, then let it go (some engine dyno can do this) then you can see the output where the engine normally wouldn't be able to achieve boost on the street, except perhaps in its final gear at the lowest rpm possible, something you won't probably do on purpose.

As to the DS I naturally feel inclined to err towards the steel style. Aluminum does offer some rotating mass advantage, and if the manufacturer insists that it will survive it might be worth the go in an automatic vehicle. But you will probably not need or notice the difference, and the aluminum maybe physically larger and more cumbersome as well.
I would however, use the lightest wheels possible, and an adequate flywheel mass if manual. In fact if it was a manual trans, use the steel shaft for sure, it might help the drivetrain feel more solid or predictable. Maybe.

Bob@BruteSpeed

iTrader: (16)

http://shop.brutespeed.com/PST-DRCM3...-PST-DRCM3.htm
PST DRCM3 3.00" Chromoly 1350 Series with Forged Slip Yoke

This PST chromoly driveshaft would be a great way for you to go for your combination. Bob

Busted67

iTrader: (1)

I'll be giving u a call soon about that drive shaft. Also what's your opinion on moroso u joint girdles?

Bob@BruteSpeed

iTrader: (16)

Thanks, I appreciate it. I've had very few people break the standard u joint girdle but the Moroso's are beefy. It seems to me the u joint yoke takes all the abuse, the u joint normally brakes before the u bolts do. Bob

Launch

I recently purchased the PST 3.00" 1350 series chromoly driveshaft from Bob@BruteSpeed for my 4th gen LS1 Camaro and it was spot on and works excellent.

The 3" diameter just gives me more clearance around everything especially with the fbody torque arm and driveshaft loops needed.

In my previous car I also had a PST 3" mild steel but with only 1310 u-joints also. That too was perfect.

You won't go wrong with a PST driveshaft and Bob is great to deal with.

Bob@BruteSpeed

iTrader: (16)

Thanks, I appreciate it! Bob