precision sc61 tapped out at 497awhp whats next?

[2bar4g63t]

whats up guys, well my precision sc61 has pretty much reached its limits at 497awhp on alamo autosports awd dyno. Im running a 2.3 with all the fuel/cooling i'll ever need. just wanted to get some recommendations on what turbo to get next, I'm running an extremely ported turbonetics cast manifold that I wanted to stick with so something compatable with that would be good. thanks.

 

[Mindslayer]

What boost you ran? And do you have a SMIM or Cams?

 

[2bar4g63t]

hks 272s, ported 1g intake and 1g heads/block

 

[2bar4g63t]

thats at 25psi on c16

 

[v2ner]

Are you sure that's the limit? Seems a bit low but if you do want more I highly recommend a T70 or 42R.

 

[CanadianTSi]

I would think that turbo is good for more than 25psi...but for an upgrade I would recommend at GT35R

 

[v2ner]

35R is basically the same thing but with ball bearing instead of a journal bearing...but i do agree with you that it is a great turbo. IMO, any of these sized turbos and bigger should be seeing at least 28psi.

 

[Mindslayer]

Yeah with your setup u can run 24-25 psi all day on pump gac. C-16 you want to see the turbo limit try 33-34 psi see what numbers you got then.

 

[1fast97gsx]

You need to run 30+ psi to make crazy numbers with that turbo. 25 psi is almost attainable on pump.

 

[qtxdevilz]

hks 272s, ported 1g intake and 1g heads/block

if what you posted above means you have a stock block...you will never be able to reach the limit of that turbo...which is probably why you are only running 25 pounds of boost...if you do have a built motor...then i would just up the boost...if you have enough fuel...

 

[2bar4g63t]

no its not a stock block, 2.4 crank, eagle rods, weisco pistons. sorry, my post was incorrect, that 497awhp was on 93 octane pump gas and 25 psi, at 30psi with c16 and more timing we only saw like a 10-15 horsepower gain, so it just seemed pointless, i know you usually see a big difference with race gas but unfortunately we didnt.

 

[2bar4g63t]

yea I was thinking the gt42R as well. anyone know if it will bolt to the turbonetics manifold?

 

[Slippi84]

DOn't take this the wrong way but I looked at your profile and your using AEM EMS and you have a zex nitrous kit so Unless 1 your numbers were not including nitrous 2 you have a boost leak or 3 something is wrong with your turbo or setup that it isn't flowing enough(might be the ported 1g manifold) I hate to say it but you just need to tune better. I mean one part of it is you only turned up the boost 5 psi after putting in c16. I personaly would have went for more like 35 psi with a built stroker motor and supporting mods including enough fuel to run whatever. That thing should be about 100whp higher. I"m not gonna say that it should make 650 or anything cause that's not very comon with a sc61 but for sure 575 should be doeable. You gut the meat to turn it up run 35 psi and I bet you will see bigger gains. This is all boost too with the nitrous you shoudl be doing crazy things.

 

[qtxdevilz]

yea I was thinking the gt42R as well. anyone know if it will bolt to the turbonetics manifold?

how much power do you want to make?how about a holset?

what manifold do you have now?

i would also try an aftermarket intake manifold and built head...the sc61 is suppose to flow 65...if you use the formula that has been floating around (65 x 10-11hp) it equals to about 650 hp at the wheels...so you are missing 100+ hp some where...

 

[2bar4g63t]

DOn't take this the wrong way but I looked at your profile and your using AEM EMS and you have a zex nitrous kit so Unless 1 your numbers were not including nitrous 2 you have a boost leak or 3 something is wrong with your turbo or setup that it isn't flowing enough(might be the ported 1g manifold) I hate to say it but you just need to tune better. I mean one part of it is you only turned up the boost 5 psi after putting in c16. I personaly would have went for more like 35 psi with a built stroker motor and supporting mods including enough fuel to run whatever. That thing should be about 100whp higher. I"m not gonna say that it should make 650 or anything cause that's not very comon with a sc61 but for sure 575 should be doeable. You gut the meat to turn it up run 35 psi and I bet you will see bigger gains. This is all boost too with the nitrous you shoudl be doing crazy things.

This was without the nitrous, agreed that i need a smim, this will go on with whatever new turbo we decide, and its deffinatley not the tuning, it was tuned by brice at alamo, who has tuned for WRC on his awd dyno. and yes we tried the higher boost levels like 35 but again saw no significant gains.

 

[dsm-onster]

2bar4g63t, you need way more cam. You may not get away with 30+ psi up top as a good set of cams might bleed you down (which is not necessarily a bad thing). Nevertheless, you're running 272s, a cam that delivers less than FP2s. Look here: FP2 vs Fp3: Back to back and see how a FP3 grind helpd Swordfish w/ his stroker setup. He gained significanly over the FP2s. The 272s are not enough to get to the full potential of that turbo.

I recommend (most aggresive cam to least aggresive): FP3X, FP2X, FP4, FP3, FP2.

 

[2bar4g63t]

how much power do you want to make?how about a holset?

what manifold do you have now?

i would also try an aftermarket intake manifold and built head...the sc61 is suppose to flow 65...if you use the formula that has been floating around (65 x 10-11hp) it equals to about 650 hp at the wheels...so you are missing 100+ hp some where...

trying to break 700 to all four, dont know anything about holset except that i dont think that they dont have a garret turbine housing so they wont work with the turbonetics exhaust manifold i have now, and the head is built and ported, really ported.

 

[2bar4g63t]

2bar4g63t, you need way more cam. You may not get away with 30+ psi up top as a good set of cams might bleed you down (which is not necessarily a bad thing). Nevertheless, you're running 272s, a cam that delivers less than FP2s. Look here: FP2 vs Fp3: Back to back and see how a FP3 grind helpd Swordfish w/ his stroker setup. He gained significanly over the FP2s. The 272s are not enough to get to the full potential of that turbo.

I recommend (most aggresive cam to least aggresive): FP3X, FP2X, FP4, FP3, FP2.

duely noted, and thanks for the tip, looks like the 272s are going up on ebay, and swordfish lives down the street from me, and his car was fawking fast, but its gone now it was a 2.4 too.

 

[dsm-onster]

trying to break 700 to all four, dont know anything about holset except that i dont think that they dont have a garret turbine housing so they wont work with the turbonetics exhaust manifold i have now, and the head is built and ported, really ported.

Any Bullseye distributor can provide you a turbine housing that will mate a Holset to your intake manifold and down pipe.

If you're looking for 700 whp, then you had better get the FP3Xs or even more cam. Don't putz around w/ 272s.

 

[aero_sallee]

Any Bullseye distributor can provide you a turbine housing that will mate a Holset to your intake manifold and down pipe.

If you're looking for 700 whp, then you had better get the FP3Xs or even more cam. Don't putz around w/ 272s.

If hes looking for 700 whp then the bullseye housing probably won't be enough to make that efficiently.

 

[Slippi84]

Any Bullseye distributor can provide you a turbine housing that will mate a Holset to your intake manifold and down pipe.

If you're looking for 700 whp, then you had better get the FP3Xs or even more cam. Don't putz around w/ 272s.

He meant exhaust manifold . But yeah with a stroker I would go with something like a JM smim or a magnus smim something like that and a cam more along the lones of a fp3 or fp3x. Sounds like you had plenty tuning knowledgable people so upgade your supporting mods and you will hit that 700 easy with the spray.

 

[dsm-onster]

If hes looking for 700 whp then the bullseye housing probably won't be enough to make that efficiently.

OH DUH!. . . The Bullseye housings have about .55 a/r and he's running a stroker... where's me head?

 

[2bar4g63t]

ok, thanks guys, so does anyone know if the gt42r will mate to my turbonetics manifold?

 

[qtxdevilz]

ok, thanks guys, so does anyone know if the gt42r will mate to my turbonetics manifold?

your manifold is a t3...the gt42r is a t4 so no it will not fit...

bullseye has mitsu housings as well as t3 and t4 hourings...i do not know what ar the t3 and t4 are though...but slowboy maxed out there 720 injectors at 26-28 psi with the smaller holset hx-35 with great spool up...so you can only imagine what the hx40 will do with bigger injectors and a higher psi...and that was on a mitsu flanged bullseye housing...i am very curious about the outcome of the holset testing...

what turbo does this swordfish individual run...

 

[2bar4g63t]

your manifold is a t3...the gt42r is a t4 so no it will not fit...

bullseye has mitsu housings as well as t3 and t4 hourings...i do not know what ar the t3 and t4 are though...but slowboy maxed out there 720 injectors at 26-28 psi with the smaller holset hx-35 with great spool up...so you can only imagine what the hx40 will do with bigger injectors and a higher psi...and that was on a mitsu flanged bullseye housing...i am very curious about the outcome of the holset testing...

what turbo does this swordfish individual run...

swordfish ran a prescision scm61 like mine but he used a mitsu housing.