Pte SCM61 Spool?

[92pearltt]

I was just trying to get an idea on what rpm the SCM61 spools in the 6176sp variant, journal bearing in the 63 ar. I am thinking about running 2 of them on my stealth. Just trying to figure out a general area of spooling.

Edit: if a mod could move this to the correct sub forum that would be great.

[Pushit2.0]

6000-6400 rpm for 20some psi. That would be a lag monster, also your tranny is the same as a fwd dsm, which would not handle such crazy hp.

~John

[goodhart]

Wow, I'm not super familiar with 3/S's, but scm61's seem like monsters for that car. biggest I have seen personally is 50 trims. (Again, not that familiar with them)

Should rip pretty good though!

[92pearltt]

Originally Posted by Pushit2.0

6000-6400 rpm for 20some psi. That would be a lag monster, also your tranny is the same as a fwd dsm, which would not handle such crazy hp.

~John

Damn that is some serious lag time. I will be swapping to the getrag 5 speed and converting it for fwd so the trans will be no problem. How are they in the 48 ar version?

[92pearltt]

Originally Posted by goodhart

Wow, I'm not super familiar with 3/S's, but scm61's seem like monsters for that car. biggest I have seen personally is 50 trims. (Again, not that familiar with them)

Should rip pretty good though!

Ya they are they are a bit big. I am going for some pretty big numbers by next summer.

[92pearltt]

whats the spool of the scm 60s in 48ar and 63ar?

[goodhart]

I see you have a project thread, you should update that thing!

[92pearltt]

I will make another thread once I collect all my parts and start working on it. I am pretty much changing the entire setup that I had in that build thread anyways.

[niterydr]

I ran twin SCM50's Dual ball bearing in the .63 a/r, if memory serves correct I was at full tilt around 5800, peak power from 6500-8500rpm.

Reducing the A/R doesn't help spool-up as much as you think it would. It does a good job of choking off the top end, its the size and pitch of the wheels that really kills spool, plus the fact that you have 1.5 liters feed each turbo. Look at what they typically spool at on a 2.0 and add to that.

What are the goals for the car? Being FWD, a little lag may help you if its a drag car. I know my car came on like a FREIGHT TRAIN when it hit, but then again I was running "all" boost, 33.5psi with the wastegates unplugged.

[92pearltt]

Originally Posted by niterydr

I ran twin SCM50's Dual ball bearing in the .63 a/r, if memory serves correct I was at full tilt around 5800, peak power from 6500-8500rpm.

Reducing the A/R doesn't help spool-up as much as you think it would. It does a good job of choking off the top end, its the size and pitch of the wheels that really kills spool, plus the fact that you have 1.5 liters feed each turbo. Look at what they typically spool at on a 2.0 and add to that.

What are the goals for the car? Being FWD, a little lag may help you if its a drag car. I know my car came on like a FREIGHT TRAIN when it hit, but then again I was running "all" boost, 33.5psi with the wastegates unplugged.

Thats exactly why I am looking to get something maybe just a little bigger than need be. This will be a street legal purpose built drag car. Completely stripped of everything other than lights pretty much, with a cage so it should be pretty light. Goal is to take down the FWD 3/s record of 10.19. Power goal would like the ability to make 1000whp but would only need ~700-800 most likely.

[niterydr]

Chris Hill was making somewhere around 750FWHP in T2 when he set that record if memory serves correct.

If I were to do a FWD drag car I would focus on getting it light and dialed in. I would ditch the twins and go single, much like I did with the stealth at the end. I had a custom spec'd 76GTS that should have made 900 or so to all 4 wheels w/o spray if the motor could hold together.

The 6g72 is pretty damn reliable to I would say 650-700hp. Once you cross that bridge, it gets expensive quick.

Put your FWD together with the 16g kit if you have all the bugs worked out and get a baseline. Power is just power, getting it to the ground and getting passes under your belt is where you will beat the ET record.

[turbotalon1g]

There is another local guy doing 3.5 with twin 5857s.

600whp 3S is sick.

[GsXtUrBo98]

Well if your looking for a scm6152e I have one for sale...

[92pearltt]

Originally Posted by niterydr

Chris Hill was making somewhere around 750FWHP in T2 when he set that record if memory serves correct.

If I were to do a FWD drag car I would focus on getting it light and dialed in. I would ditch the twins and go single, much like I did with the stealth at the end. I had a custom spec'd 76GTS that should have made 900 or so to all 4 wheels w/o spray if the motor could hold together.

The 6g72 is pretty damn reliable to I would say 650-700hp. Once you cross that bridge, it gets expensive quick.

Put your FWD together with the 16g kit if you have all the bugs worked out and get a baseline. Power is just power, getting it to the ground and getting passes under your belt is where you will beat the ET record.

I thought he was at 850FWHP when he made that pass. I can't say for sure though.

My engine "should" be able to handle the power. I have cp pistons, pauter rods, forged crank. I will be getting h13 tool steel wrist pins, then it will all be put in my 4 bolt block. Theoretically the parts are there but we will see if its capable or not.

The 16g kit is long gone, I sold most of my stuff to be able to come to school out of state. I am kind of starting from scratch again. Slit second is having a sale on their tdo5 manifold kit, so that is the reason I even got this idea in my head.

I want a single kit but I can't seem to find any I like. The ips kit is like 8 grand, I like the placement of that kit since its not above the tranny so it wont melt stuff. I just don't personally think that kit is worth the money even though it is super high quality.

Like you said its all about driving ability also so that is definitely something I need to work on. I am taking some chassis design classes right now so hopefully I can use some of that knowledge and figure some ways to get traction. I already have a few ideas in mind for that part. I just want to do one build and be done with it. For now at least. I was kind of thinking getting some 10:1 mahle pistons and running a high compression turbo motor on e98 but that may come later.

[niterydr]

Originally Posted by 92pearltt

I thought he was at 850FWHP when he made that pass. I can't say for sure though.

My engine "should" be able to handle the power. I have cp pistons, pauter rods, forged crank. I will be getting h13 tool steel wrist pins, then it will all be put in my 4 bolt block. Theoretically the parts are there but we will see if its capable or not.

The 16g kit is long gone, I sold most of my stuff to be able to come to school out of state. I am kind of starting from scratch again. Slit second is having a sale on their tdo5 manifold kit, so that is the reason I even got this idea in my head.

I want a single kit but I can't seem to find any I like. The ips kit is like 8 grand, I like the placement of that kit since its not above the tranny so it wont melt stuff. I just don't personally think that kit is worth the money even though it is super high quality.

Like you said its all about driving ability also so that is definitely something I need to work on. I am taking some chassis design classes right now so hopefully I can use some of that knowledge and figure some ways to get traction. I already have a few ideas in mind for that part. I just want to do one build and be done with it. For now at least. I was kind of thinking getting some 10:1 mahle pistons and running a high compression turbo motor on e98 but that may come later.

How do you plan on keeping the head down? My problem wasn't the short block (minus shattering oil pumps and cracking cranks reving to 9000rpm), it was keeping the heads down. IPS has/had some A1 research head studs and I know a few years ago there was extensive talk about pinning the heads, not sure where that discussion went as I pretty much just tune bolt-on 3s's now.

[92pearltt]

I don't know if you were around but ray pampena came out with a head lift fix. I don't the exact works of it but I know he welds something on the head surface and pretty much completely solves the problem. With that fix I will be running stock head bolts and stock head gaskets. Potentially oringing the block. This is the setup all the big guns are running now with zero head lift problems. Also someone came out with billet oil pump gears to solve the oil gears shattering problem.

[92pearltt]

I have a set of 13ts at home that need rebuilt, I think I am just gonna build the motor how I want it and slap the 13ts on till I get the chassis dialed in and get some passes under my belt then I will go all out with the turbo kit when the time comes. I might be able to squeeze 500whp out of the 13ts since I am fwd. That will leave me with a good baseline and a better knowledge of the power I am gonna need to get the record.