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

who's got the most psi

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Old 04-24-03, 01:16 PM
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who's got the most psi

Just wondering who is running the most boost? Either TII or third gen.
Old 04-24-03, 01:29 PM
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17-22 psi w/ T60-1 .70 comp. Q trim & 1.00 A/R, 1680cc injectors x 4 ran by a Wolf EMS stand alone...

So I guess I don't run the most boost....
Old 04-24-03, 01:45 PM
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Brad, care to post a dyno sheet? Thanks Carl
Old 04-24-03, 07:05 PM
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Well I think RICE RACING is up near 30 psi....
Old 04-24-03, 07:28 PM
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after im tuned 25ish
Old 04-24-03, 07:35 PM
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Ralph at Xcessive runs in the 30ish area. Don't quote me on this, but I think its 32 or 34 psi. But I could be wrong. CJ
Old 04-24-03, 08:23 PM
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actually on his website he says 22psi, i know that is kind of old, but I don't think he's at 30 yet.
Old 04-25-03, 12:26 AM
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Originally posted by mynamegotjacked
Well I think RICE RACING is up near 30 psi....
Not yet but will be @ 43.5psi real soon
Old 04-25-03, 12:38 AM
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Originally posted by RICE RACING
Not yet but will be @ 43.5psi real soon
Been there already!

499rwhp@15psi
648rwhp@25psi
?98rwhp@?psi


crispeed
87 Rx-7 TII
9.204@150.47mph
2600lbs
un-tubbed
Old 04-25-03, 02:51 AM
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Originally posted by RICE RACING
Not yet but will be @ 43.5psi real soon
im just wondering what you guy's engine setups are that hold up to over 30psi?
Old 04-25-03, 05:12 AM
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Originally posted by crispeed
Been there already!

499rwhp@15psi
648rwhp@25psi
?98rwhp@?psi


crispeed
87 Rx-7 TII
9.204@150.47mph
2600lbs
un-tubbed
On an idealized scale 43.5psi should equate to around 850rwhp on 43.5psi going of your other number chris

But by using the question mark on the psi? and guessing that the ?98rwhp is probably 798rwhp = 38psi boost ??? That is purley guess work becasue if your hardware has changed from the 15psi & 25psi figures then it is imposible to use this method (or if the basic hardware will not support the higher pressure ratios "too small compressor map & massive increase in exhaust housing/turbine/header induced back pressure" will all result in lower than expected increases due to loss of Ve% of the engine turbo combination @ that pressure level.)

I am hoping for .....

?05rwhp @ ??psi
Old 04-25-03, 08:56 AM
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That was on his old turbo, the t04x^2. He's said that one would'nt push more than 27psi BTW: The website is extremely old. CJ
Old 04-25-03, 10:16 AM
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anyone thought of running staged turbos? for crazy pressure ratios.
Old 04-25-03, 11:39 AM
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Originally posted by Mikey
im just wondering what you guy's engine setups are that hold up to over 30psi?
Methanol
Old 04-25-03, 01:03 PM
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In2Twins:

I haven't dyno'd it yet and I've done all tuning while driving it. Keep in mind 22psi is on 92 octane fuel....If I ran C-116 I could up the timing and run close to 30psi, but then my T60-1 would be on deaths door at that point....Not to mention 255's aren't gonna stick with 30psi, so I figure less is more in my case....Everyones got there own thang...

ChrisSpeeds car is the **** in my opinion....What an amazing time for a stock chassis RX-7, but then he's running alcohol....Big difference too... anyway, when I get back from Shitcago I'll post the dyno times.....

Any bets on what it will be @ 22psi?
Old 04-25-03, 02:04 PM
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Originally posted by bkapold@aol.com
I haven't dyno'd it yet and I've done all tuning while driving it. Keep in mind 22psi is on 92 octane fuel....
Wow.
You must really have to retard the timing to push that much on 92...
Old 04-25-03, 08:01 PM
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im tuned to 28 psi currently .....720 rwhp on c16
12A turbo no nitrous!!!!
Old 04-25-03, 08:18 PM
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and I'll say it again.....timing is everything....thats 80% of the tuning battle...

Brad
Old 04-25-03, 11:29 PM
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Originally posted by bkapold@aol.com
In2Twins:

I haven't dyno'd it yet and I've done all tuning while driving it. Keep in mind 22psi is on 92 octane fuel....If I ran C-116 I could up the timing and run close to 30psi, but then my T60-1 would be on deaths door at that point....Not to mention 255's aren't gonna stick with 30psi, so I figure less is more in my case....Everyones got there own thang...

ChrisSpeeds car is the **** in my opinion....What an amazing time for a stock chassis RX-7, but then he's running alcohol....Big difference too... anyway, when I get back from Shitcago I'll post the dyno times.....

Any bets on what it will be @ 22psi?
Dear god! What is your porting like, and what advance to you run at tq peak and power peak? What are your intake temps at that boost! I worry for you, although not nearly so much since your turbo selection (choice of trims, housings, etc) is very nice. I had planned to run a similar combo with 1.15 Q, and .7 62-1 comp a long time ago, but I got poor.
Old 04-25-03, 11:30 PM
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BTW, depending on your porting, manifold, exhaust, etc, I will say around 500rwhp @ 22psi.
Old 04-26-03, 04:23 AM
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Originally posted by 680RWHP12A
im tuned to 28 psi currently .....720 rwhp on c16
12A turbo no nitrous!!!!
Gotta love water to air IC's and bridgeports
Old 04-26-03, 06:55 AM
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Relvinnian: Fear not my firend j/k BTW: the car is Vette silver....big difference

My intake temps are very cool and range from 30C-50C on an 80 deg F day...

I won't run 22psi that much or 20psi at that.....My porting and engine was built by the all mighty Kevin Wyum ASP racing and myself up here in Minne....The porting is a somewhat large single port and nothing was really done to the motor except the porting...

Alf/soul 7 ran 25psi on a simular T04S turbo using an S5 motor and had 500 plus hp....before he bridge'd it.... I have a friend from Puerto Rico who is a Wolf EMS tuning god, so I can't take all the credit.... my point????? 22psi isn't sh*t....
Old 04-26-03, 07:24 AM
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yeah,,, uh my boost is stock, so 8psi i guess. I think i win!!! Anyone running lower? i think ill just weld the wastegate and connect a fuel cut def. and see what happens. J/k...
Old 04-26-03, 08:54 AM
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I've ran 28lbs of boost. I know Demetrios and Ray Wilson have run over 30psi. Hell, if you add the stress of N2o, its safe to say racers of pushed upwards of 40psi. Its all about winning.
Old 04-26-03, 10:14 AM
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Ernie, I thought you said it was all about tuning


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