got numbers for gt35/40
08-30-02, 07:48 AM
#76
Senior Member
Thread Starter
Join Date: Feb 2001
Location: MA
Posts: 265
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by A-Spec Tuning
I think you'll be seeing alot bigger #'s than you think once you hit the sweet spot on that thing. It starts to really work well over 17lbs-18lbs. 15lbs is nothing with that turbo.
Thanks,Sean
I think you'll be seeing alot bigger #'s than you think once you hit the sweet spot on that thing. It starts to really work well over 17lbs-18lbs. 15lbs is nothing with that turbo.
Thanks,Sean
08-30-02, 07:58 AM
#77
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
Silver93TT, your numbers are great news. I was afraid from all the talk that 400 HP would be an absolute limit for this turbo and porting wouldn't help. I was thinking that the turbine would become a choke point even with big porting. Especially after seeing how small the turbine inlet is. I think I'll be going with this one for sure now.
08-30-02, 08:58 AM
#78
Registered User
Join Date: Dec 2001
Location: Chicago
Posts: 428
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Toy
I'm not so sure i want to see bigger #s...still haven't driven with 400rwhp yet. By the way, long time no talk...how are ya?
I'm not so sure i want to see bigger #s...still haven't driven with 400rwhp yet. By the way, long time no talk...how are ya?
Has the kit done everything I promised? and are you happy with it.?Tyson this will easily do the 400hp mark and there are 7's doing alot more than 400. Give us a call we can answer any Q's you may have.
Also for all you FC guys it's available for you guys as well.
Last edited by A-Spec Tuning; 08-30-02 at 09:19 AM.
08-30-02, 09:32 AM
#79
Senior Member
Thread Starter
Join Date: Feb 2001
Location: MA
Posts: 265
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by A-Spec Tuning
I'm fine thanks and you could always turn it back down if it's to much for ya. Has the kit done everything I promised? and are you happy with it.?
I'm fine thanks and you could always turn it back down if it's to much for ya.
Has the kit done everything I promised? and are you happy with it.?Oh, i got to see the manifold glow bright red for the first time during the tuning session. Pretty cool and also kind of scary...i knew rotaries put out a lot of heat but not that much.
08-30-02, 01:54 PM
#82
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by A-Spec Tuning
Tyson this will easily do the 400hp mark and there are 7's doing alot more than 400. Give us a call we can answer any Q's you may have.
Tyson this will easily do the 400hp mark and there are 7's doing alot more than 400. Give us a call we can answer any Q's you may have.
08-30-02, 01:56 PM
#83
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Silver93TT
My manifold glowed also. The inlet isn't small, 4" but then it tapers down
My manifold glowed also. The inlet isn't small, 4" but then it tapers down
08-30-02, 02:16 PM
#84
Braap Braap Braap BOOM!
Join Date: Mar 2001
Location: Ft. Worth, TX
Posts: 843
Likes: 0
Received 0 Likes
on
0 Posts
Yes, the smaller a/r's significantly limit power potential. I don't see why someone would go with anything but the biggest on a dual ball bearing turbo that spools this fast.
08-30-02, 02:18 PM
#85
Braap Braap Braap BOOM!
Join Date: Mar 2001
Location: Ft. Worth, TX
Posts: 843
Likes: 0
Received 0 Likes
on
0 Posts
no 850's arent going to be enough. I've hit 90-92% duty cycle with my stock 550 and 1600cc combo on a cool night. Usually the duty is in the mid 80's. I think I'll need even more fuel for higher boost.
08-30-02, 02:27 PM
#86
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
Is your fuel pressure dropping? According to RP's fuel calculator your injectors should be good for a bit more power, but maybe your pump can't keep up. Although, I don't think the computer can compensate automatically for dropping fuel pressure under WOT. Maybe with a bit more fuel pressure you can re-tune and get a lower duty cycle.
Although, I don't think the computer can compensate automatically for dropping fuel pressure under WOT. Maybe with a bit more fuel pressure you can re-tune and get a lower duty cycle.
Last edited by TYSON; 08-30-02 at 02:32 PM.
08-30-02, 03:05 PM
#87
Braap Braap Braap BOOM!
Join Date: Mar 2001
Location: Ft. Worth, TX
Posts: 843
Likes: 0
Received 0 Likes
on
0 Posts
I'm not sure what the fuel pressure is set at. Dave set it. I need to get a guage for the regulator so I can monitor it. I'm running the cosmo pump for now, and from some very reputable sources it is good up to 20 psi.
I only saw the 90% on the peak hold. Perhaps I had a boost spike and thats when the duty shot up. I will have to do some more monitoring.
I only saw the 90% on the peak hold. Perhaps I had a boost spike and thats when the duty shot up. I will have to do some more monitoring.
08-30-02, 03:06 PM
#88
Photo Diety
Join Date: Mar 2001
Location: Florida
Posts: 2,311
Likes: 0
Received 0 Likes
on
0 Posts
Silver,
A higher flow/pressure pump in combination with aftermarket fuel regulator and a higher base pressure should give you the flow you need, correct? Perhaps something that's greater than 1:1. Or...drop in 850cc primaries. I know EVERYONE seems to think they don't work, but I had NO problems when I ran four 850's and will probably just go that route with my 1300cc secondaries. Swapping out for a different ratio fpr will of course necessitate a retune :-)
Michel
A higher flow/pressure pump in combination with aftermarket fuel regulator and a higher base pressure should give you the flow you need, correct? Perhaps something that's greater than 1:1. Or...drop in 850cc primaries. I know EVERYONE seems to think they don't work, but I had NO problems when I ran four 850's and will probably just go that route with my 1300cc secondaries. Swapping out for a different ratio fpr will of course necessitate a retune :-)
Michel
08-30-02, 03:34 PM
#90
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
It'll idle rich, but you should be able to lean it out. I haven't messed with mine yet, so I do run rich at idle. The setting field on the PFC worked some, my duty cycle dropped from 4.4 to 3.8, but I still need to tune out some more fuel at idle.
08-30-02, 03:34 PM
#91
03 Cobra Killer
Join Date: Jan 2002
Location: All Over
Posts: 1,423
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Silver93TT
I hear the 850 primaries make the idle too rich.
I hear the 850 primaries make the idle too rich.
Will post my results.rx7tt95/tyson - did you have to do anything other than a double o-ring using the 550cc injector rings to make your 850's fit properly?
k
08-30-02, 03:38 PM
#92
WTF is wrong with it now?
Join Date: Oct 2001
Location: London, ON
Posts: 1,492
Likes: 0
Received 0 Likes
on
0 Posts
I didn't do anything. I got 850's from RP and dropped them in. I was very careful to make sure they went down in the socket as well as I could and that's it. It has sat as long as a week since I've done it and never flooded, so I guess fuel is not leaking past the o-ring.
08-30-02, 11:07 PM
#93
Senior Member
Join Date: Jul 2001
Location: Binghamton, NY
Posts: 451
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by A-Spec Tuning
Also for all you FC guys it's available for you guys as well.
Also for all you FC guys it's available for you guys as well.
Details, etc..
Where can you get it?
Do they sell it at the RX-7 store.
08-30-02, 11:12 PM
#94
Rotary Enthusiast
Join Date: Feb 2001
Location: In the Sky
Posts: 1,190
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by twiztedjeckel
Price?
Details, etc..
Where can you get it?
Do they sell it at the RX-7 store.
Price?
Details, etc..
Where can you get it?
Do they sell it at the RX-7 store.
they make kits for the FD and the FC
08-31-02, 10:40 PM
#97
Photo Diety
Join Date: Mar 2001
Location: Florida
Posts: 2,311
Likes: 0
Received 0 Likes
on
0 Posts
I simply dropped mine right in and like Tyson, I was VERY careful when doing it. Mind you I'm still fully sequential so you can imagine what a PITA it is to swap out the primary injectors! Initially, the as-delivered tuning from SR was very rich at idle (but PERFECT at WOT and I'll post the dyno graph with a/f ratio to prove it and at low speed, high load situations the car would buck and sputter. Not fun. Since I was a venerable PFC newbie at the time, I was petrified of making any changes. But enough was enough and I pulled fuel out of the idle "cells". It had been in the 121 region and I went down to the 102 region. Perfect idle, no more driveability issues either! It was just as good as running the 550's in the primary slots.
and at low speed, high load situations the car would buck and sputter. Not fun. Since I was a venerable PFC newbie at the time, I was petrified of making any changes. But enough was enough and I pulled fuel out of the idle "cells". It had been in the 121 region and I went down to the 102 region. Perfect idle, no more driveability issues either! It was just as good as running the 550's in the primary slots.
08-31-02, 10:45 PM
#98
Photo Diety
Join Date: Mar 2001
Location: Florida
Posts: 2,311
Likes: 0
Received 0 Likes
on
0 Posts
Oh that dyno is with the main cat in place. I sent my PFC to Ray in Cali (I'm in Florida) and told him my mods and what boost level I was planning to run. I got back spot-on tuning. I was very pleased. So the 850's can work very well with the PFC (and I'm sure other stand-alone computers). I think I just used the 550 inj. O-rings...can't remember if I double 0-ringed it or not. Too long ago! I'm pretty sure I used the 550 rings as I had only one new set :-) That's the important thing, to use brand spanking new 0-rings on the injectors. Also, use a bit of synthetic on the rings so they'll slide right in. The synth will also protect the rings from damage upon insertion into the fuel rail.
Michel
Michel