t67 4" inlet, does it surge?

[91-gsx]

I was wondering if a t67, would surge at 20psi of boost? I only ask because I am not planning at running it at high boost on the streets, but I do not want it to surge because of the 4" inlet that lacks the surge ports. Maybe it just doesnt work like that with this turbo, thats mostly why I am asking.
thanks for the help

 

[oztofrdm]

You might want to re-think about your turbo because a 67 at 20psi is gonna be a joke on a 4G. They like the boost to be around 35 and up. Shit my 35r feels slow/sluggish under 27psi

 

[91-gsx]

You might want to re-think about your turbo because a 67 at 20psi is gonna be a joke on a 4G. They like the boost to be around 35 and up. Shit my 35r feels slow/sluggish under 27psi

Well I dont really need to explain my choice of turbo, but I was going to go with a sc6152 that flows 65lb and this turbo can be had with the t3 housing and stage 5 wheel in a .63 a/r housing. Well the t3 t67 that slowboy sells also comes with the exact same hot side but with the t67 compressor wheel for more flow. So I get the same spool-up and more power, maybe just a bit laggier, but I doubt it because it is the exact same turbine wheel and housing.
any help with the question at hand is appreciated, does it surge with a 4" inlet and surge ports at 20psi? Now I am asking about 20psi, but The goal is to run close to 30psi later down the line.

 

[Turbo Monk3y]

I highly doubt it will surge unless you got the custom Dual ball bearing t-67... The wheel is too big to have boost come on really quick in a low gear such as 4th or 5th.... My Gt35R with PTE's bullet hole Anti Surge ports still surge really bad in 5th gear flooring it around 70MPH... For it not to surge I have to be at 7500-8000rpms in 4th then shift to 5th gear while still floored, then I will not have surge... Any other gears I think you will be fine as the t-67 wheels are larger and it is Journal bearing so it won't come into boost that quick..

 

[91-gsx]

I highly doubt it will surge unless you got the custom Dual ball bearing t-67... The wheel is too big to have boost come on really quick in a low gear such as 4th or 5th.... My Gt35R with PTE's bullet hole Anti Surge ports still surge really bad in 5th gear flooring it around 70MPH... For it not to surge I have to be at 7500-8000rpms in 4th then shift to 5th gear while still floored, then I will not have surge... Any other gears I think you will be fine as the t-67 wheels are larger and it is Journal bearing so it won't come into boost that quick..

Thats a good thing then, atleast thats one thing less to worry about.
thnaks for the help

 

[Street Surgeon]

Will it surge? Not if you spring for the anti-surge housing

 

[91-gsx]

Will it surge? Not if you spring for the anti-surge housing

Turbo Monk3y just said that his gt35r surges even with the anti-surge holes... I was just making sure if it would surge or not, but learned that the surge is generaly caused by fast spool-up. This will not be the case with my setup because it will not spool-up really quick.
later

 

[Slippi84]

Well I dont really need to explain my choice of turbo, but I was going to go with a sc6152 that flows 65lb and this turbo can be had with the t3 housing and stage 5 wheel in a .63 a/r housing. Well the t3 t67 that slowboy sells also comes with the exact same hot side but with the t67 compressor wheel for more flow. So I get the same spool-up and more power, maybe just a bit laggier, but I doubt it because it is the exact same turbine wheel and housing.
any help with the question at hand is appreciated, does it surge with a 4" inlet and surge ports at 20psi? Now I am asking about 20psi, but The goal is to run close to 30psi later down the line.

You think a t67 t3 will only spool "slightly" slower than a sc6152. ANyway No a t67 with a t3 hot side will not surge. There are 2 local guys that I know that run a similar turbo and neither sufer from surge and I don't think either of them have surge ports.

 

[91-gsx]

You think a t67 t3 will only spool "slightly" slower than a sc6152. ANyway No a t67 with a t3 hot side will not surge. There are 2 local guys that I know that run a similar turbo and neither sufer from surge and I don't think either of them have surge ports.

The sc6152 has the exact same turbine wheel and housing. The only way that the turbo would spool slower then the sc6152 is if the compressor wheel weighs more then the sc6152 compressor wheel....highly doubt it...
later

 

[definitiveno]

highly doubt it...
later

Well if mass equates to weight, and the t67 wheel is bigger, wouldn't doubt that they both weigh the same be a natural response?

 

[91-gsx]

What I meant is that it might lag more because of the added weight of the compressor wheel, but I highly doubt it is as big of a difference as moving up to a bigger turbine wheel or turbine housing. I just can't imagine it weighing in that much more, and on top of that adding that much more lag...
later

 

[Slippi84]

So in that case if I mate a gt42 compressor onto a 14b hotside it should spool just as fast as a 14b right

Anyway I was not trying to tell you what turbo to buy or not to buy just trying to educate you and let you know that a t67 with a t3 exhaust hosuing is not gonna spool like a sc6152. sc6152 would be looking at about 4300-4500rpm full boost on a 2.0 where as the t67 spools closer to 4800 while not a big deal to some to others it is. This is with the same .ar too.

 

[91-gsx]

So in that case if I mate a gt42 compressor onto a 14b hotside it should spool just as fast as a 14b right

Anyway I was not trying to tell you what turbo to buy or not to buy just trying to educate you and let you know that a t67 with a t3 exhaust hosuing is not gonna spool like a sc6152. sc6152 would be looking at about 4300-4500rpm full boost on a 2.0 where as the t67 spools closer to 4800 while not a big deal to some to others it is. This is with the same .ar too.

See I told you why I thought it would spool about the same. You just told me that it won't spool the same way and that it will be laggier, now if this your attempt at educating me, I just did not learn a thing because you simply told me something and did not explain it. Now why is it laggier?... I'm in full acceptance of the part were it might be laggier, but why?
later

 

[Slippi84]

Lets first understand that Lag is actually an improper term refering to the amount of time it takes to get your center section spinning fast enouh to produce boost. Then lets understand the laws of physics that it takes more force enegery and or time to move something that weighs more(or is of more mass) than something that is lighter(or of less mass). Now to my point the t67 has a larger compressor side which is heavier than the compressor side of the sc6152. I understand your thinkink that the exhaust side is the same and that's the side that people refer to when talking about lag and all that good stuff but the two blades are connected and when push comes to shove you still have to get that compressor blade spinning. SO I think it should be clear that a turbo(t67) with a heavier compressor blade will take longer to spin than a car with the same exhaust side but a smaller compressore blade(sc6152).

 

[nanokpsi]

Well I dont really need to explain my choice of turbo, but I was going to go with a sc6152 that flows 65lb and this turbo can be had with the t3 housing and stage 5 wheel in a .63 a/r housing. Well the t3 t67 that slowboy sells also comes with the exact same hot side but with the t67 compressor wheel for more flow. So I get the same spool-up and more power, maybe just a bit laggier, but I doubt it because it is the exact same turbine wheel and housing.
any help with the question at hand is appreciated, does it surge with a 4" inlet and surge ports at 20psi? Now I am asking about 20psi, but The goal is to run close to 30psi later down the line.

I don't think it will surge. I don't have surge ports and I'm fine (no surge) but I run a bigger hotside and turbine wheel.
It will be laggier than a 6152 but more than you think. Also, the only power difference at low boost is going to be from changes in efficiciencies by switching the wheels, as you give no reason for the 67 to flow more (same hotside). If you don't plan on making more than 600whp you might just be buying into more lag just to say you have a 67.

Just my .02

 

[TSisleeper]

What's all this surge and lag stuff mean? 75 shot will take care of it all and if you can't be on the bottle then take one of these:

 

[turbo90gsx]

Rofl

 

[91-gsx]

I don't think it will surge. I don't have surge ports and I'm fine (no surge) but I run a bigger hotside and turbine wheel.
It will be laggier than a 6152 but more than you think. Also, the only power difference at low boost is going to be from changes in efficiciencies by switching the wheels, as you give no reason for the 67 to flow more (same hotside). If you don't plan on making more than 600whp you might just be buying into more lag just to say you have a 67.

Just my .02

See I alreay explained why I wanted this turbo. It does not have such a big hotside, so I can hit full boost before or at 5000 rpms, is this possible on this turbo? I also went around searching for this turbo on the internet and ofcourse supras run them and other six cylinder cars, but they generaly run the t4 hotside. I found that the honda crowd run this turbo all the time and they are making incredible numbers at like 15psi, over 400whp... The also have smaller engines, and are building plenty of boost before 5000rpm, so I thought sense we have 2 liter engines that it would take a bit less time. Now sure they have built engines and all, but my whole point of having this turbo is to push the stock block, but easily. Now our engines take 400whp reliably, I think this turbo will not take crazy tuning and boost from me to hit that goal, and yes I can do that with a sc6152 easily, but once you want to go above that is when you have to drop race gas in. Lets say I am boosting 25psi, the sc6152 will still not make as much power as the t67 at this low of a boost level because the t67 flows 100whp/10lb/min more of air. Most of us here would consider a fp3675 that evil eagle ran to 9500rpm as a big turbo, but during his pump gas dyno at 20psi, he made 500whp. Now you cannot convince me that is an efficient boost level for that turbo.
thanks for the help

 

[Slippi84]

See I alreay explained why I wanted this turbo. It does not have such a big hotside, so I can hit full boost before or at 5000 rpms, is this possible on this turbo? I also went around searching for this turbo on the internet and ofcourse supras run them and other six cylinder cars, but they generaly run the t4 hotside. I found that the honda crowd run this turbo all the time and they are making incredible numbers at like 15psi, over 400whp... The also have smaller engines, and are building plenty of boost before 5000rpm, so I thought sense we have 2 liter engines that it would take a bit less time. Now sure they have built engines and all, but my whole point of having this turbo is to push the stock block, but easily. Now our engines take 400whp reliably, I think this turbo will not take crazy tuning and boost from me to hit that goal, and yes I can do that with a sc6152 easily, but once you want to go above that is when you have to drop race gas in. Lets say I am boosting 25psi, the sc6152 will still not make as much power as the t67 at this low of a boost level because the t67 flows 100whp/10lb/min more of air. Most of us here would consider a fp3675 that evil eagle ran to 9500rpm as a big turbo, but during his pump gas dyno at 20psi, he made 500whp. Now you cannot convince me that is an efficient boost level for that turbo.
thanks for the help

So sacrafise daily civilty because your worried about not being able to tune a turbo to it's typical power level....sounds like a great idea

By the way those smaller engines run much higher compression that's why they get away with doing what they do.

 

[91-gsx]

So sacrafise daily civilty because your worried about not being able to tune a turbo to it's typical power level....sounds like a great idea

By the way those smaller engines run much higher compression that's why they get away with doing what they do.

You have rolling eyes in 2 of the 4 posts that you posted on this thread, stop being such a big smart ass. I show you respect when I ask questions and reply to your posts with respect, never bashing on you once... If all you can do is bash because you think you know it all, then keep your knowledge to yourself.
later, and thanks to those of you with real world answers.

 

[Slippi84]

You have rolling eyes in 2 of the 4 posts that you posted on this thread, stop being such a big smart ass. I show you respect when I ask questions and reply to your posts with respect, never bashing on you once... If all you can do is bash because you think you know it all, then keep your knowledge to yourself.
later, and thanks to those of you with real world answers.

You've been given real world answers and you want to keep fighting the facts I"m given you. I'm the only one to break down why it spools slower than you THINK. I am not the one asking for advice and knowlede and ignoringing what everyone is telling me. You don't want to know if this turbo will surge you want people to come on here and tell you no so you can feel better about going with the t67 ........and i'll delete the faces since it ruffles your panties.


Edit: heres some real world I'm looking at your profile unless you have a fmic for the sc6152 and a built engine and fmic kit for the t67 laying around or your profile isn't updated your not ready for either turbo.

 

[fulanititoo8198]

You have rolling eyes in 2 of the 4 posts that you posted on this thread, stop being such a big smart ass. I show you respect when I ask questions and reply to your posts with respect, never bashing on you once... If all you can do is bash because you think you know it all, then keep your knowledge to yourself.
later, and thanks to those of you with real world answers.

I agree

 

[91-gsx]

I am not the one asking for advice and knowlede and ignoringing what everyone is telling me. You don't want to know if this turbo will surge you want people to come on here and tell you no so you can feel better about going with the t67 ........and i'll delete the faces since it ruffles your panties.

Dude, your still posting on this thread... Damn you just know everything man, you know about all the turbos and how I'm feeling, you just like the Dr. Phil of dsms. See the thing is that I came here and asked a very specific question, take a look at the title. "t67 4" inlet, does it surge?" I asked a question that had to do with my setup, not if you guys thought if I should go with this turbo or not. Now, people came on here and told me their opinion on the surge and if it would or not.

That is all I wanted man, you come on here and roll your eyes and give me shit about:

So in that case if I mate a gt42 compressor onto a 14b hotside it should spool just as fast as a 14b right

I think you should put back those rolling eyes on your posts, they make you look like an ass now... and like an ass a few years from now when another dsmer reads it.
later

 

[Kevin Jewer]

You guys need to relax. This arguement is weak. At least make it entertaining for ####s sake...

Back on topic. I ran a T67 in a regular TO4S cover, with a T3 .82 housing and O trim wheel in a stroker. No surge. 30 psi by 4800 rpm. Don't argue with me, figure out if you can somehow relate this to your turbo and make some use of it. If not, it doesn't affect my life.

As for upgrading the compressor wheel and not the turbine wheel and it's affect on lag or boost threshold, I ran a TDO6H/7cm 20g and a TDO6H/7cm 56 trim (35R wheel) back to back. 20g had 25 psi at 3700 rpm, 56 trim had 25 psi at 4400 rpm. I'll bet this comparison relates well enough to the 56 trim vs T67. See disclaimer above.

Another point worth making is that increasing the size of the compressor wheel but not increasing the size of the turbine side will not give you more power at the same boost pressure if neither comp wheel was maxed out. I have learned this from first hand experience, not E-arguments. A 2 liter with all the usual variables at 30 psi will move around 55 lbs/min. A 35R will do 65 lbs/min max (upper 30s psi on 2 liter, 30 psi on stroker). At 20 psi a 2 liter will be good for low 40s almost invariably. Why you need a 75 lb wheel to move ~40 lbs is beyond me. I'm not going to tell you how to mod your car, but I thought it was worth pointing out.

Good luck.

 

[91-gsx]

You guys need to relax. This arguement is weak. At least make it entertaining for ####s sake...

Back on topic. I ran a T67 in a regular TO4S cover, with a T3 .82 housing and O trim wheel in a stroker. No surge. 30 psi by 4800 rpm. Don't argue with me, figure out if you can somehow relate this to your turbo and make some use of it. If not, it doesn't affect my life.

As for upgrading the compressor wheel and not the turbine wheel and it's affect on lag or boost threshold, I ran a TDO6H/7cm 20g and a TDO6H/7cm 56 trim (35R wheel) back to back. 20g had 25 psi at 3700 rpm, 56 trim had 25 psi at 4400 rpm. I'll bet this comparison relates well enough to the 56 trim vs T67. See disclaimer above.

Another point worth making is that increasing the size of the compressor wheel but not increasing the size of the turbine side will not give you more power at the same boost pressure if neither comp wheel was maxed out. I have learned this from first hand experience, not E-arguments. A 2 liter with all the usual variables at 30 psi will move around 55 lbs/min. A 35R will do 65 lbs/min max (upper 30s psi on 2 liter, 30 psi on stroker). At 20 psi a 2 liter will be good for low 40 alost invariablys. Why you need a 75 lb wheel to move ~40 lbs is beyond me. I'm not going to tell you how to mod your car, but I thought it was worth pointing out.

Good luck.

That post was very helpful man. It makes sense, and I could see were the t3 t67 would lag more then I want it to, especialy on a stock block that I am not planning to rev to the moon. I have been thinking about the t67, but I do not believe it is for me, I will stick to my original choice for the t3 sc6152 in a .63 housing. I am just asking because you seem to have a lot of experience with different setups, but do you think I would see any gain going to a .82 a/r, maybe more boost because of lower egt's and such? And sense the sc6152 doesnt hit full boost that fast, do you think I should get the TO4SP cover with the anit-surge ports? I only ask because I read that the ports decrease the power you make.
thanks for the help