Single Turbo RX-7's Questions about all aspects of single turbo setups.

A Little Taste: PFS tuned and built ......w/..GT 42R

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Old 11-05-05, 08:20 AM
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Originally Posted by howard coleman
congratulations on getting it done. i am running 850/1600 w 40 static fuel pressure and am not tuned out but am up to 87% duty cycle at 7200. what are you running for fuel injectors and what's your static fuel pressure?

thanks,

howard coleman
Same fuel pressure. Running 920cc primaries and 1680 secondaries. (Primary inj. are from a Supra.....thats why they sound odd sized)
Old 11-05-05, 08:52 AM
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damn, sweet numbers!
Old 11-05-05, 09:31 AM
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Damn Ernie, Excellent #’s
BTW thanks for finding the Upper limit of my clutch setup, I was wondering how much it could hold


Originally Posted by ErnieT
ACT 6puck w/ the extreme pressure plate. It only has like 80 miles on it. Pratically brand new. The car hit 596rwhp at 29psi at 6000rpms, but at 6500 the clutch gave out big time...lol....So we let it cool, Ray adjusted the clutch under the steering wheel (apparantly I had adj. too far out) and we backed the boost to 25psi and it held fine so I kept it there. I didn't get out of there till midnight so I didn't grab any dyno sheets. I'll get Ray to email them to me on Monday.
Old 11-05-05, 09:43 AM
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Ernie, if you get a chance, run a dyno at a pump gas boost level like 15 or so. I'd like to see how that turbo does down low as well as up around 25
Old 11-05-05, 09:45 AM
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Thumbs up

Looks like we will be seeing some noise on Sunday. Can't wait to see you run the car man. Midnight tuning? Does that mean Ray gets to charge you time and a half

Last edited by Fd3BOOST; 11-05-05 at 09:49 AM.
Old 11-05-05, 09:54 AM
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Originally Posted by TT_Rex_7

Not to get off topic here, but how are the Exedy twin plate clutches on the street?

-Alex
not bad.. a little stiffer but very tolerable for the street!
Old 11-05-05, 10:29 AM
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Originally Posted by Wargasm
Ernie, if you get a chance, run a dyno at a pump gas boost level like 15 or so. I'd like to see how that turbo does down low as well as up around 25
Wargasm, he is running the larger 102mm 42R, it is about 4% less efficient at lower boost levels, than the smaller 94mm. However he implied he was going for over 30lbs and would eventually be running a custom intake manifold. The larger wheel has a broader map which will allow help him when he is ready for more airflow. I would say for most every street app. the smaller 94mm wheel is all you will need.

-S-
Old 11-05-05, 11:25 AM
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Originally Posted by Wargasm
Ernie, if you get a chance, run a dyno at a pump gas boost level like 15 or so. I'd like to see how that turbo does down low as well as up around 25
Im going back up to Ray's this week for tuning on pump gas at 15psi.
Old 11-05-05, 11:40 AM
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Nice numbers ernie. I want to come see that beast! i get off work at 5, ill give you a call. btw do you still need my wheels? or did you get the other ones?
Old 11-05-05, 03:32 PM
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Originally Posted by Zero R
........and would eventually be running a custom intake manifold.
Speaking of that, PM me your e-mail addy again ErnieT. I should have some solid models of my intake manifold on Monday. I was able to squeeze in ~22" runners with a 1 degree taper on all sides, a plenum, and 4 oval ITB's I machined to match the runners!

-Alex
Old 11-05-05, 05:56 PM
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Originally Posted by TT_Rex_7
Speaking of that, PM me your e-mail addy again ErnieT. I should have some solid models of my intake manifold on Monday. I was able to squeeze in ~22" runners with a 1 degree taper on all sides, a plenum, and 4 oval ITB's I machined to match the runners!

-Alex

Post pictures. That sounds interesting.

-Destin
Old 11-05-05, 09:48 PM
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Hey Ernie, nice numbers. What were your AFR'S? IIRC mine were around 11.7 when mine was tuned on C16.
Old 11-05-05, 10:01 PM
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dammmm! Nice numbers

Big Congrats
Old 11-06-05, 05:18 AM
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A/F's were right at 12.0 on C116.
Old 11-06-05, 08:36 AM
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Originally Posted by ErnieT
A/F's were right at 12.0 on C116.
Rock N Roll !
Old 11-06-05, 09:11 PM
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Originally Posted by onefastrx7turbo
Post pictures. That sounds interesting.

-Destin
If you'd like, send me a PM, and I can send you some pictures. I don't wan't to clog up ErnieT's thread.

-Alex
Old 11-06-05, 10:19 PM
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Was good to see everyone out there today. Rob went a 10.6 @ 126mph! He's got his **** togeather! Bad news is he didn't have a passenger seat so they DQ'ed him, but didn't dq me for not having a cage! Go figure. I supposed they felt sorry for me and my horrible driving skills! I had LOTS of cobwebs on my driving. First of all I spun my *** off all day and never got better than a 1.59 60' which sucks for me. My first run I short shifted 2nd gear and the car fell on its face, then I missed 4th gear! Ran a 11.1@125.
2nd run was worse! I stalled in the burnout box because they didn't spray any water down, then bogged off the line, then at the top of 3rd gear I tried speed shifting and went into reverse!!!! Not good, but got very luck and didnt damage anything.
I qualified 15th in the "quick 16" and was paired up with a 9sec. mustang.
So on to my 3rd and final run. Did a huge "Ernie T" burnout....lol...., tree'ed the mustang, but still spun my *** off with a 1.59 60' and short shifted 2nd gear again, but hit all the other gears ok. Ended up with a 10.77 @133mph, which is my best et by ..01 and best mph by 5mph. It would have probably hit 138-140mph had I not fell out of boost totally in 2nd gear. So I'd say it has a 10.40 in it, maybe better....time will tell. I have to get my suspension dialed in more, get my trailing arms and toe links on and get some new slicks and skinnies up front. Then she'll hook!
Huge props to Ray for getting my car done in time. We were at his shop till 12am Friday night on the dyno. He did a fantastic job with everything! Anyone needing anything done from mild to wild, go to PFS.
Old 11-06-05, 10:31 PM
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Originally Posted by ErnieT
Was good to see everyone out there today. Rob went a 10.6 @ 126mph! He's got his **** togeather! Bad news is he didn't have a passenger seat so they DQ'ed him, but didn't dq me for not having a cage! Go figure. I supposed they felt sorry for me and my horrible driving skills! I had LOTS of cobwebs on my driving. First of all I spun my *** off all day and never got better than a 1.59 60' which sucks for me. My first run I short shifted 2nd gear and the car fell on its face, then I missed 4th gear! Ran a 11.1@125.
2nd run was worse! I stalled in the burnout box because they didn't spray any water down, then bogged off the line, then at the top of 3rd gear I tried speed shifting and went into reverse!!!! Not good, but got very luck and didnt damage anything.
I qualified 15th in the "quick 16" and was paired up with a 9sec. mustang.
So on to my 3rd and final run. Did a huge "Ernie T" burnout....lol...., tree'ed the mustang, but still spun my *** off with a 1.59 60' and short shifted 2nd gear again, but hit all the other gears ok. Ended up with a 10.77 @133mph, which is my best et by ..01 and best mph by 5mph. It would have probably hit 138-140mph had I not fell out of boost totally in 2nd gear. So I'd say it has a 10.40 in it, maybe better....time will tell. I have to get my suspension dialed in more, get my trailing arms and toe links on and get some new slicks and skinnies up front. Then she'll hook!
Huge props to Ray for getting my car done in time. We were at his shop till 12am Friday night on the dyno. He did a fantastic job with everything! Anyone needing anything done from mild to wild, go to PFS.
On that 135mph pass, what was your 1/8 mile mph?
Old 11-06-05, 10:44 PM
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Originally Posted by LUPE
On that 135mph pass, what was your 1/8 mile mph?
108mph....,but like I said, I short shifted 2nd and totally came out of boost, so that should have been higher as well.
Old 11-06-05, 10:46 PM
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Nice !

what gears you got
4.10 still?
Old 11-06-05, 10:48 PM
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Originally Posted by ErnieT
108mph....,but like I said, I short shifted 2nd and totally came out of boost, so that should have been higher as well.
damn........ you were running 25psi today?
Old 11-07-05, 01:04 AM
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Stock gears...4.10's and running 25-26psi
Old 11-07-05, 08:37 AM
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Nice numbers...Id kill for 1.59 60fts
What is your suspension setup?
Old 11-07-05, 08:46 AM
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Nice job on everything! It's been fun watching this thread!! Sounds like you're looking for ways to eek out a couple tenths of a second in the 1/4, so I wonder if you've considered a variable boost controller like the AVC-R. What's your minimum boost level? I think the AVC-R is a great device to limit boost in 1st and 2nd for launching without loosing traction.
Old 11-07-05, 09:03 AM
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Originally Posted by III Gen X
Nice job on everything! It's been fun watching this thread!! Sounds like you're looking for ways to eek out a couple tenths of a second in the 1/4, so I wonder if you've considered a variable boost controller like the AVC-R. What's your minimum boost level? I think the AVC-R is a great device to limit boost in 1st and 2nd for launching without loosing traction.
No, he just needs good track conditions and tires.

Last edited by LUPE; 11-07-05 at 09:12 AM.


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