Q for those with a hybrid turbo
#1
Despise Enmity
Thread Starter
Join Date: May 2001
Location: Richmond, VA
Posts: 2,420
Likes: 0
Received 0 Likes
on
0 Posts
Q for those with a hybrid turbo
Has anyone (S4 or S5 peoples) upgraded to a T04 (E, B, whatever ) compressor and not clipped the turbine? Issues? Pros/Cons?
#2
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,831
Received 2,597 Likes
on
1,845 Posts
i had one like that, to4e front with a stock rear, in an s5 turbine housing. it worked fine, but it was tricky to get it to have a consistant boost. it would go to 5psi by 3000ish then at about 5k it would kinda spike to 10-11psi and then level out at about 13.
with some work on the boost controller i was able to get it to hit 11psi by 2500rpms and stay there
the fuel tuning was off too, it was rich down low
with some work on the boost controller i was able to get it to hit 11psi by 2500rpms and stay there
the fuel tuning was off too, it was rich down low
#3
Currently Winning
Join Date: May 2002
Location: Birmingham, AL
Posts: 2,438
Likes: 0
Received 0 Likes
on
0 Posts
how'd you fit a to4e with the stock manifolds? did you use a spacer?
RPeck has a T04B with a stock unclipped compressor wheel. I have a T04B with a P-trim, clipped. But my car is still in pieces, heh.
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
Rpeck has some issues with his clipped wheel but he's not sure what exactly it was, because he had wastegate issues as well (and he's still running stock AFM/intercooler/ecu which would upset things too). Now, i hate to put words in his mouth so i'll leave it at that.
Another issue you need to deal with is boost creep. If you port the mighty hell out of the wastegate... may not be too big of a problem. But if you have a full exhaust system (which you should have if you're going to a hybrid anyway) then you could still see creep. it is a possibility, at least.
RPeck has a T04B with a stock unclipped compressor wheel. I have a T04B with a P-trim, clipped. But my car is still in pieces, heh.
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
Rpeck has some issues with his clipped wheel but he's not sure what exactly it was, because he had wastegate issues as well (and he's still running stock AFM/intercooler/ecu which would upset things too). Now, i hate to put words in his mouth so i'll leave it at that.
Another issue you need to deal with is boost creep. If you port the mighty hell out of the wastegate... may not be too big of a problem. But if you have a full exhaust system (which you should have if you're going to a hybrid anyway) then you could still see creep. it is a possibility, at least.
#4
New Project on the Way...
iTrader: (2)
Josepi,
From the experiences of people whom have done what you are refering to have dynod at a max of 275HP, spool is descent, and power band is alright, all thaught boost leaks out at the top end of the rpm range.
I have a Hybrid with machined Exhaust housing and T04 turbine, and T04R compressor housing and compressor.
From the experiences of people whom have done what you are refering to have dynod at a max of 275HP, spool is descent, and power band is alright, all thaught boost leaks out at the top end of the rpm range.
I have a Hybrid with machined Exhaust housing and T04 turbine, and T04R compressor housing and compressor.
#5
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,831
Received 2,597 Likes
on
1,845 Posts
ok i lied i have no idea what the compressor is, its a 3" inlet though, its a tight sqeeze
on my stock port motor, it has power up to 7200+
on cymfc3s's ported engine it did run out of steam at like 6500, where it did 265rwhp@9psi
on my stock port motor, it has power up to 7200+
on cymfc3s's ported engine it did run out of steam at like 6500, where it did 265rwhp@9psi
#6
Despise Enmity
Thread Starter
Join Date: May 2001
Location: Richmond, VA
Posts: 2,420
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by jreynish
Josepi,
From the experiences of people whom have done what you are refering to have dynod at a max of 275HP, spool is descent, and power band is alright, all thaught boost leaks out at the top end of the rpm range.
I have a Hybrid with machined Exhaust housing and T04 turbine, and T04R compressor housing and compressor.
Josepi,
From the experiences of people whom have done what you are refering to have dynod at a max of 275HP, spool is descent, and power band is alright, all thaught boost leaks out at the top end of the rpm range.
I have a Hybrid with machined Exhaust housing and T04 turbine, and T04R compressor housing and compressor.
Trending Topics
#8
Despise Enmity
Thread Starter
Join Date: May 2001
Location: Richmond, VA
Posts: 2,420
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by j9fd3s
ok i lied i have no idea what the compressor is, its a 3" inlet though, its a tight sqeeze
on my stock port motor, it has power up to 7200+
on cymfc3s's ported engine it did run out of steam at like 6500, where it did 265rwhp@9psi
ok i lied i have no idea what the compressor is, its a 3" inlet though, its a tight sqeeze
on my stock port motor, it has power up to 7200+
on cymfc3s's ported engine it did run out of steam at like 6500, where it did 265rwhp@9psi
#9
New Project on the Way...
iTrader: (2)
I am not too certain but the housing was milled enough so that a t04 Turbine wheel slightly clipped would fit in the S5 turbine housing. I could only suggest asking your local turbo shop if they could do it. So essencially I have a t04 turbo with a slightly smaller turbine housing! Not too shabby!
Injectors are:
550 cc stock primaries
1600 cc Secondaries
Injectors are:
550 cc stock primaries
1600 cc Secondaries
#11
Currently Winning
Join Date: May 2002
Location: Birmingham, AL
Posts: 2,438
Likes: 0
Received 0 Likes
on
0 Posts
fwiw i have never heard of the most rwhp you can get with a hybrid being 275rwhp. hell you can almost do that with the stocker if you have every other mod.
#12
Despise Enmity
Thread Starter
Join Date: May 2001
Location: Richmond, VA
Posts: 2,420
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by jreynish
I am not too certain but the housing was milled enough so that a t04 Turbine wheel slightly clipped would fit in the S5 turbine housing. I could only suggest asking your local turbo shop if they could do it. So essencially I have a t04 turbo with a slightly smaller turbine housing! Not too shabby!
Injectors are:
550 cc stock primaries
1600 cc Secondaries
I am not too certain but the housing was milled enough so that a t04 Turbine wheel slightly clipped would fit in the S5 turbine housing. I could only suggest asking your local turbo shop if they could do it. So essencially I have a t04 turbo with a slightly smaller turbine housing! Not too shabby!
Injectors are:
550 cc stock primaries
1600 cc Secondaries
#13
surprised you didn't see this earlier in the year, it was in the microtech section
https://www.rx7club.com/forum/showth...5&pagenumber=1
most hybrids with to4b housings and compressor wheels will max out around 300-330 rwhp depending on your set up.
rxtasy on teamfc3s put down 320 rwhp with a to4b hybrid @1bar with an e6k, old school greddy frount mount, and some big secondaries.
Basically as stated above, the stock turbine will become a small restriction especially in the upper rpms. Clipping the turbine though also forces you to lose some of the responsiveness of the turbo. It's a trade off.
https://www.rx7club.com/forum/showth...5&pagenumber=1
most hybrids with to4b housings and compressor wheels will max out around 300-330 rwhp depending on your set up.
rxtasy on teamfc3s put down 320 rwhp with a to4b hybrid @1bar with an e6k, old school greddy frount mount, and some big secondaries.
Basically as stated above, the stock turbine will become a small restriction especially in the upper rpms. Clipping the turbine though also forces you to lose some of the responsiveness of the turbo. It's a trade off.
#15
Stud Service
iTrader: (3)
Join Date: Apr 2002
Location: Lancaster PA
Posts: 741
Likes: 0
Received 0 Likes
on
0 Posts
What is the difference between these hybrids and the BNR stage 1 upgrade?.....running stock primaries 720 secondaries FD fuel`pump street port hit 240HP RW at 8PSI. Not sure if that low for what I have.
#16
New Project on the Way...
iTrader: (2)
Originally posted by Josepi
How's the transition when those secondaries come online? If it seems like I'm drilling ya, well...you have a LT8 S5 TII too...hehe
How's the transition when those secondaries come online? If it seems like I'm drilling ya, well...you have a LT8 S5 TII too...hehe
No worries I don't mind the drillings... I am in the military!
#17
I don't have 3rd gear
Join Date: Jan 2003
Location: California
Posts: 747
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by $150FC
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
I have a 15 deg clip on my stock s5 turbine wheel, and a to4 housing and 60-1 turbine. My car dynoed at 295rwhp running really lean. Once I get the bigger injectors in the primaries i will dyno tune again.
#18
New Project on the Way...
iTrader: (2)
Originally posted by xzyras
What
I have a 15 deg clip on my stock s5 turbine wheel, and a to4 housing and 60-1 turbine. My car dynoed at 295rwhp running really lean. Once I get the bigger injectors in the primaries i will dyno tune again.
What
I have a 15 deg clip on my stock s5 turbine wheel, and a to4 housing and 60-1 turbine. My car dynoed at 295rwhp running really lean. Once I get the bigger injectors in the primaries i will dyno tune again.
What management?
Specifics?
#19
What R U thinking self?
Join Date: Mar 2002
Location: Stockton, CA
Posts: 2,333
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by $150FC
how'd you fit a to4e with the stock manifolds? did you use a spacer?
RPeck has a T04B with a stock unclipped compressor wheel. I have a T04B with a P-trim, clipped. But my car is still in pieces, heh.
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
Rpeck has some issues with his clipped wheel but he's not sure what exactly it was, because he had wastegate issues as well (and he's still running stock AFM/intercooler/ecu which would upset things too). Now, i hate to put words in his mouth so i'll leave it at that.
Another issue you need to deal with is boost creep. If you port the mighty hell out of the wastegate... may not be too big of a problem. But if you have a full exhaust system (which you should have if you're going to a hybrid anyway) then you could still see creep. it is a possibility, at least.
how'd you fit a to4e with the stock manifolds? did you use a spacer?
RPeck has a T04B with a stock unclipped compressor wheel. I have a T04B with a P-trim, clipped. But my car is still in pieces, heh.
The problem with the stock turbine wheel is that you will not get full boost up top. the power will die down above ~6500rpm because the engine is being choked by the turbine. that is why you clip it. you lose some response but you gain the top-end.
Rpeck has some issues with his clipped wheel but he's not sure what exactly it was, because he had wastegate issues as well (and he's still running stock AFM/intercooler/ecu which would upset things too). Now, i hate to put words in his mouth so i'll leave it at that.
Another issue you need to deal with is boost creep. If you port the mighty hell out of the wastegate... may not be too big of a problem. But if you have a full exhaust system (which you should have if you're going to a hybrid anyway) then you could still see creep. it is a possibility, at least.
I love it!
-Robert
#20
Do a barrel roll!
iTrader: (4)
Rpeck (or anyone esle this may apply to): are you using the S4 manifold and exhaust housing? if so, with the wastegate ported very large (and larger flap welded on) are you having any problems with boost creep with your hybrid setups? I have a S4 T04B hybrid, v-trim wheel.... and one of my main concerns is that I wont be able to control the creep, even with the big wastegate porting.
#21
What R U thinking self?
Join Date: Mar 2002
Location: Stockton, CA
Posts: 2,333
Likes: 0
Received 0 Likes
on
0 Posts
Another thing I have noticed is; I see no reason at all I cannot hit 15+ PSi of boost if I want to. Every turn of the MBC it responed by going up to where I set it instantly. I will probally run 15 PSI after I get a FMIC assuming my fuel flow will hold up to that.
here is a pic of my A/F and boost curve.
here is a pic of my A/F and boost curve.
#22
What R U thinking self?
Join Date: Mar 2002
Location: Stockton, CA
Posts: 2,333
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Rxmfn7
Rpeck (or anyone esle this may apply to): are you using the S4 manifold and exhaust housing? if so, with the wastegate ported very large (and larger flap welded on) are you having any problems with boost creep with your hybrid setups? I have a S4 T04B hybrid, v-trim wheel.... and one of my main concerns is that I wont be able to control the creep, even with the big wastegate porting.
Rpeck (or anyone esle this may apply to): are you using the S4 manifold and exhaust housing? if so, with the wastegate ported very large (and larger flap welded on) are you having any problems with boost creep with your hybrid setups? I have a S4 T04B hybrid, v-trim wheel.... and one of my main concerns is that I wont be able to control the creep, even with the big wastegate porting.
#23
What R U thinking self?
Join Date: Mar 2002
Location: Stockton, CA
Posts: 2,333
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by $150FC
(and he's still running stock AFM/intercooler/ecu which would upset things too).
(and he's still running stock AFM/intercooler/ecu which would upset things too).
#24
I don't have 3rd gear
Join Date: Jan 2003
Location: California
Posts: 747
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by jreynish
At what PSI?
What management?
Specifics?
At what PSI?
What management?
Specifics?
I have a S4 TII. 87'
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
immanuel__7
2nd Generation Specific (1986-1992)
89
09-05-15 10:23 AM