Going even bigger on the turbo. Share your thoughts
12-23-2012, 04:14 AM
#28
Senior Member
****, sorry for thread jacking, PS ask sythe snake whats up. He has the s259 and he hit 605 whp. Pretty much got tired of the s256 just like you. Be different though!
Comp turbo, triple ceramic ball bearing with billet wheel! http://www.compturbo.com/products/ct3billet/ct3_6262
Or why not just go with a GTX3582!? That can support 600whp easy too.
12-23-2012, 02:06 PM
#30
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Yes his motor was set up a little looser than most builds we have done just for this reason, and it took a few months of 30psi beating from a ball bearing 256. It made a little over 500whp on 24psi low timing. After the dyno I raised the boost to 30psi, advanced timing and set the meth back up. This should have been about the 600 mark or further. It was a few months later the car would start to lose coolant steadily "also daily driven". There is more to this story but I wont get into it. It seems to me that the pressure it requires to make around the 600 mark is about the limit on a factory block/sleeves.
12-23-2012, 03:17 PM
#35
Former Vendor
I would take the 259 over the 262 for a 600whp setup. Scythesnake is running the 259 and he was able to hit 600whp and his setup spools about as late as you want on a street car. The 262 on my car is not enjoyable when driving around. It is just too laggy.
A larger EFR would be a great idea for your goals. You should be able to achieve spool a little better than your 256 with 600whp potential on E85.
A larger EFR would be a great idea for your goals. You should be able to achieve spool a little better than your 256 with 600whp potential on E85.
12-23-2012, 03:22 PM
#36
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12-23-2012, 04:06 PM
#38
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Yes his motor was set up a little looser than most builds we have done just for this reason, and it took a few months of 30psi beating from a ball bearing 256. It made a little over 500whp on 24psi low timing. After the dyno I raised the boost to 30psi, advanced timing and set the meth back up. This should have been about the 600 mark or further. It was a few months later the car would start to lose coolant steadily "also daily driven". There is more to this story but I wont get into it. It seems to me that the pressure it requires to make around the 600 mark is about the limit on a factory block/sleeves.
.....thats what i wanna know :P im running 6262 now and curious to spools times
12-23-2012, 06:43 PM
#41
i can't really give you a solid answer since i never really opened it up. but i have a video on the dyno and a 30mph 2nd gear pull to 80 when i was on the 262 and .70 a/r. its just too slow... thats why matt and i agreed on going to the 259 and a .55 housing when i was having the engine rebuilt. muuuuuuuch better powerband, and an overall faster car even though it makes a bit less peak.
heres a dyno where you can see boost vs rpm.
heres a dyno where you can see boost vs rpm.
12-23-2012, 08:35 PM
#45
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My headgasket never even leaked and looked good when I took it out. The motor lasted for quite some time without the girdled block at 30 psi. It was the times I tried to go to 32-33 that broke it. As long as the piston clearance is good to take the heat it should last a good while. 30 would be my max on a stock block.
12-23-2012, 09:46 PM
#47
Former Vendor
My 6262 does nothing below 4k rpm. Even if I downshift and hit 5k, it still comes on slow because the wheel is so big and heavy.
6262 is right between the 259 for spool and power potential. Spool probably closer to the 259 and power probably closer to the 262. Of course there are housing options as well.
6262 is right between the 259 for spool and power potential. Spool probably closer to the 259 and power probably closer to the 262. Of course there are housing options as well.
12-23-2012, 11:19 PM
#48
Senior Member
My 6262 does nothing below 4k rpm. Even if I downshift and hit 5k, it still comes on slow because the wheel is so big and heavy.
6262 is right between the 259 for spool and power potential. Spool probably closer to the 259 and power probably closer to the 262. Of course there are housing options as well.
6262 is right between the 259 for spool and power potential. Spool probably closer to the 259 and power probably closer to the 262. Of course there are housing options as well.
12-23-2012, 11:22 PM
#49
once i get the traction and suspension side of this car down i'll be able to really put the 259 through its paces. granted the transmission holds, things a beast i tell you.
i'll see what happens when i get it out there. but i have a feeling for the ET i'm wanting on the manual transmission. the 259 power will be okay for 1st and 2nd gear boost levels. but i'm going to need more power in the later gears to pull me through. thats why i'm leaning more towards a ball bearing precision 6262 .63 when i make the fuel system switch and put the ported head on there. just take care of it all at once.
i'll see what happens when i get it out there. but i have a feeling for the ET i'm wanting on the manual transmission. the 259 power will be okay for 1st and 2nd gear boost levels. but i'm going to need more power in the later gears to pull me through. thats why i'm leaning more towards a ball bearing precision 6262 .63 when i make the fuel system switch and put the ported head on there. just take care of it all at once.
12-23-2012, 11:56 PM
#50
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