S4 making 260rwhp/ 282tq @ 14psi
08-17-03, 12:36 AM
#1
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
S4 making 260rwhp/ 282tq @ 14psi
i have all my mods listed below in my sig... I dynoed today onthe stock S4 turbo. 260 rwhp / 282 rwtq @ 14psi, then my boost dropped to 10psi after 5,000rpm. Its still really rich but i couldnt tunn anymore because i had a problem with my fuel pump not wanting to work sometimes so i didnt want to take the risk of blowing the motor. So ill hopfully get that problem resolved and then back to dyno. I want to achieve 280-290 rwhp with the stock S4 turbo. I know it wont last too long, but im not boost crazy plus its not my everyday driver. and yes it leaks oil!!! not THAT badly though
08-17-03, 01:12 AM
#6
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
ok here the link. If it dosent work then just copy and past it
http://hostingprod.com/@sandorsrx7.c...?1061100605493
http://hostingprod.com/@sandorsrx7.c...?1061100605493
Trending Topics
08-17-03, 01:40 AM
#9
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
well that thing with that.. i think its the fuel pump, cause i have it re-wired so the pump is at 10 volts crunsing and then it kicks up to 14volts , and also the secondarys kick in as well... could this be it?
08-17-03, 02:56 AM
#10
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by ERAUMAZDA
maybe you have the 3800 hesistation.......just at about 3800 you lost power or your secondaries are not kicking in properly
maybe you have the 3800 hesistation.......just at about 3800 you lost power or your secondaries are not kicking in properly
Looking at the A/F graph though, I'd say the settings at that area are way out, and the transistion could be improved.
08-17-03, 03:23 AM
#11
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
i also have a chart here i made, my FC with the stock single vs my friends FD with the stock Twins... My goal was to have it spool just as fast, and make as much power as the FD does at low end.....
http://hostingprod.com/@sandorsrx7.c...?1061108219001
http://hostingprod.com/@sandorsrx7.c...?1061108219001
08-17-03, 05:09 AM
#12
Senior Member
Join Date: Aug 2002
Location: BC, Canada
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
Wow, those are great numbers. Once I get my replacement used S4 turbo in and dyno I would freaking love to see those numbers!
I've even got a streetport ontop so I might get lucky and hit the big 300!
I've even got a streetport ontop so I might get lucky and hit the big 300!
08-17-03, 11:38 AM
#14
Junior Member
Join Date: Nov 2002
Location: Kalamazoo Michigan
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
Are you using the stock wastegate? Also, do you think your intercooler could be whats causing the pressure to drop? (Im not sure the s4 turbo can flow enough air). But anyway, very nice indeed. Hopefully my car will reach the same glory as yours. 
08-17-03, 12:22 PM
#15
Senior Member
Join Date: Aug 2002
Location: BC, Canada
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
I"m pretty sure the turbo can't flow enough air.
I'd love to see what that runs in the 1/4 mile. Just to see the faces on some people when it runs a 12.9 Cause everyone says it's not possible...
I'd love to see what that runs in the 1/4 mile. Just to see the faces on some people when it runs a 12.9
Cause everyone says it's not possible...
08-17-03, 01:13 PM
#16
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest 
08-17-03, 01:30 PM
#18
Back from teh deadly!
Join Date: Feb 2001
Location: Louisville KY 40299
Posts: 1,163
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by T210thAnniv
ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest
ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest
I think boost falls of because its a stock turbo. ALmost everybody has that problem. Boost will start falling for me at ~6k.
08-17-03, 01:36 PM
#19
Senior Member
Join Date: Aug 2002
Location: BC, Canada
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by T210thAnniv
ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest
ya the Ic is WAY too big for the stock turbo... it does have a good amount of pressure drop. Im sure the turbo sees well over 18psi. I actually want to check it by putting another boost gauge right into the ic pipe coming out fo the turbo for hahas and giggles just to see. As soon as i tunn out the A/F more i am def going to go do 1/4. My goal was high 12's so ill see. Ill try my hardest
08-17-03, 01:37 PM
#20
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
ya def adam... The stock is just not big enough to boost and make power high end at this psi. Now i was going to get a full t4, but now since i got the feel of how this bastard spools so freaking fast, i dont think i want a full t4 anymore. I want to keep the spool time the same, and try to get a little bit more top power. Im thinking BNR?? send my stocker out, clipp the wheels, get t4 compresor? Anyone have a setup like this? Or running a BNR or similar turob?
08-17-03, 01:44 PM
#21
Back from teh deadly!
Join Date: Feb 2001
Location: Louisville KY 40299
Posts: 1,163
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by T210thAnniv
ya def adam... The stock is just not big enough to boost and make power high end at this psi. Now i was going to get a full t4, but now since i got the feel of how this bastard spools so freaking fast, i dont think i want a full t4 anymore. I want to keep the spool time the same, and try to get a little bit more top power. Im thinking BNR?? send my stocker out, clipp the wheels, get t4 compresor? Anyone have a setup like this? Or running a BNR or similar turob?
ya def adam... The stock is just not big enough to boost and make power high end at this psi. Now i was going to get a full t4, but now since i got the feel of how this bastard spools so freaking fast, i dont think i want a full t4 anymore. I want to keep the spool time the same, and try to get a little bit more top power. Im thinking BNR?? send my stocker out, clipp the wheels, get t4 compresor? Anyone have a setup like this? Or running a BNR or similar turob?
Plus, if you really think about it, the only time youre gonna worry about lag the initial slam on the gas to WOT. After that, youre spooled up and good to go.
08-17-03, 01:48 PM
#22
Senior Member
Join Date: Aug 2002
Location: BC, Canada
Posts: 555
Likes: 0
Received 0 Likes
on
0 Posts
Got a question, what sorta water temps(on the stock gauge) do you see on the highway with your fmic? Are you still using the stock clutch fan? I have the H34 BOV too, how many washers did you end up using? Are you routing it back into the intake?
08-17-03, 01:55 PM
#23
SOLD THE RX-7!
Join Date: Mar 2001
Location: Vancouver, BC, Canada
Posts: 7,451
Likes: 0
Received 0 Likes
on
0 Posts
dude your primary injectors are too small. you are maxing them out at 3000. from 3000-3800 you are WAY to lean. that is why you are making the torque there. leaner = more power but the engine wont' last too long like that.
at 3800 the A/F instantly drops back down when your secondarys kick in.
the boost drop is pretty normal. the stock turbo is too small.
do you have an intake / TID? not in your sig. that will help a bit. rebuilding the turbo might too.
at 3800 the A/F instantly drops back down when your secondarys kick in.
the boost drop is pretty normal. the stock turbo is too small.
do you have an intake / TID? not in your sig. that will help a bit. rebuilding the turbo might too.
Last edited by Scott 89t2; 08-17-03 at 02:00 PM.
08-17-03, 02:37 PM
#24
EIT
Join Date: Jan 2002
Location: Austin, TX
Posts: 1,790
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Scott 89t2
dude your primary injectors are too small. you are maxing them out at 3000. from 3000-3800 you are WAY to lean. that is why you are making the torque there. leaner = more power but the engine wont' last too long like that.
at 3800 the A/F instantly drops back down when your secondarys kick in.
the boost drop is pretty normal. the stock turbo is too small.
do you have an intake / TID? not in your sig. that will help a bit. rebuilding the turbo might too.
dude your primary injectors are too small. you are maxing them out at 3000. from 3000-3800 you are WAY to lean. that is why you are making the torque there. leaner = more power but the engine wont' last too long like that.
at 3800 the A/F instantly drops back down when your secondarys kick in.
the boost drop is pretty normal. the stock turbo is too small.
do you have an intake / TID? not in your sig. that will help a bit. rebuilding the turbo might too.
Have you messed with your timing at all?
08-17-03, 06:08 PM
#25
Senior Member
Thread Starter
Join Date: Mar 2002
Location: Connecticut
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
ya i got the TID 3" intake... Actually my stock TID wouldnt let me go past 9psi, it was too restrivtive... Ya i am getting 720 primaries asap. I noticed that myself on the dyno, how it was kinda too high around 3000 mark...
Jason.... Ya i got a after market water temp. I see around 205 on street, 185 on highway. Got stock clucth fan as well. 6 washers in the bov... hope thst helps.
Jason.... Ya i got a after market water temp. I see around 205 on street, 185 on highway. Got stock clucth fan as well. 6 washers in the bov... hope thst helps.