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

PFS Tuned GT42R makes 643RWHP!!!

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Old 11-17-05 | 06:51 PM
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Any plans for water injection? I would because it gives you a little cushion in the case of fuel starvation. I mean a perfect tune isn't going to prevent a fuel system or ignition problem.
Old 11-17-05 | 06:53 PM
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Originally Posted by t-von
a perfect tune isn't going to prevent a fuel system or ignition problem.
but c16 will
Old 11-17-05 | 06:59 PM
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Originally Posted by t-von
Any plans for water injection? I would because it gives you a little cushion in the case of fuel starvation. I mean a perfect tune isn't going to prevent a fuel system or ignition problem.
Water inj. isn't doing anything really when your running high boost. Its good for pump gas, but if it fails you'll still blow your motor. When your running meth/water inj. you run alot richer so you have to lean it out. Well, if it fails and your going to be too lean and boom, same result. It does reduce intake charge temps, but mine arn't that high to begin with.
Old 11-17-05 | 07:04 PM
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awesome numbers
Old 11-17-05 | 10:53 PM
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Nice numbers Ernie. I am guessing this was on the same clutch you were using at MIR? Dave told me you did not do any pulls at 30psi because clutch could not handle it.

And that CYM should be able to go high 8's. I can see it now. Congrats man, the car is a beauty.
Old 11-17-05 | 11:01 PM
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Originally Posted by Row-Tar-Eeeh
Nice numbers Ernie. I am guessing this was on the same clutch you were using at MIR? Dave told me you did not do any pulls at 30psi because clutch could not handle it.

And that CYM should be able to go high 8's. I can see it now. Congrats man, the car is a beauty.
Fresh clutch.
Old 11-17-05 | 11:15 PM
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So Ernie........ You have a 76mm compressor wheel, correct?
Old 11-18-05 | 12:24 AM
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very nicely done, how did the motor react with that much boost with your tune?
Old 11-18-05 | 08:05 AM
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Originally Posted by CtotheHRIS
very nicely done, how did the motor react with that much boost with your tune?
You mean "other" than the 643rwhp?? J/k
Old 11-18-05 | 08:13 AM
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Holy big numbers batman!!! Nice to see some big numbers coming out of the RX7 camp again. Haven't seen #'s like this in a long time! From an FD i guess i should say before i get blasted.

Great job Ernie!!! Big #'s on the dyno......now let's see some little #'s on the et and huge on the mph. I'd say maybe around 142-144 and if you get a perfect run maybe a 9.55-9.70. Think i'm in the ballpark? What are you shooting for if everything goes right?

Good luck and be safe. Congrats again!
Old 11-18-05 | 11:29 AM
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Originally Posted by silvr94r2
You mean "other" than the 643rwhp?? J/k

haham yea pretty much, haha
Old 11-18-05 | 11:57 AM
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What's the threshold on boost pressure with C16 fuel? Most I have heard is 32psi is there anyone who has ran higher than that. Most cars running past the 30psi mark simply switch over to alcohol. I'm curious to see how high ErnieT will go because that's the fuel I want to run in my car.
Old 11-18-05 | 12:02 PM
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Titan ran 45psi on their supra running C16. There's also C23 available that is good for around 60psi.




Originally Posted by 13btnos
What's the threshold on boost pressure with C16 fuel? Most I have heard is 32psi is there anyone who has ran higher than that. Most cars running past the 30psi mark simply switch over to alcohol. I'm curious to see how high ErnieT will go because that's the fuel I want to run in my car.
Old 11-18-05 | 01:09 PM
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Originally Posted by silvr94r2
Holy big numbers batman!!! Nice to see some big numbers coming out of the RX7 camp again. Haven't seen #'s like this in a long time! From an FD i guess i should say before i get blasted.

Great job Ernie!!! Big #'s on the dyno......now let's see some little #'s on the et and huge on the mph. I'd say maybe around 142-144 and if you get a perfect run maybe a 9.55-9.70. Think i'm in the ballpark? What are you shooting for if everything goes right?

Good luck and be safe. Congrats again!
Thanks! I'd be happy right now with a nice low 10 sec. pass. Anything better would just be a bonus.
Old 11-18-05 | 02:44 PM
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Originally Posted by LUPE
So Ernie........ You have a 76mm compressor wheel, correct?
it's a 74.5mm inducer. ernie, how is ray the owner of pfs, i thought peter farrell was?
Old 11-18-05 | 02:46 PM
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Originally Posted by fdracer
it's a 74.5mm inducer. ernie, how is ray the owner of pfs, i thought peter farrell was?
His modified gt42r has a 74.5 mm wheel?
Old 11-18-05 | 03:05 PM
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Exclamation

Originally Posted by fdracer
how is ray the owner of pfs, i thought peter farrell was?
Peter was the owner obviously from the name Peter Farrell Supercars, but then Peter got tired of the business and Ray who was Peters head mechanic bought Peter out last year. So now it's PFSupercars, not really Peter Farrell Supercars. I think it was a smart decision to keep the name. The "PFS" initials are pretty well known and definitelty well established. Make sense?
Old 11-18-05 | 04:53 PM
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Congrats, great numbers,

but WTF?

Originally Posted by ErnieT
LOL...No 3 bar = 30psi
No, 1 bar = 14.5037738 pounds per square inch,
so 3 bar = 43.5113213 pounds per square inch
Old 11-18-05 | 05:19 PM
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Map sensors measure absolute atm, what you describe is relative atm

so 3bar abs atm = 2bar rel atm





Originally Posted by Christian Alatalo
Congrats, great numbers,

but WTF?



No, 1 bar = 14.5037738 pounds per square inch,
so 3 bar = 43.5113213 pounds per square inch
Old 11-18-05 | 05:24 PM
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Originally Posted by pluto
Map sensors measure absolute atm, what you describe is relative atm

so 3bar abs atm = 2bar rel atm
Good to know
Old 11-18-05 | 05:26 PM
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Those numbers are out of this world!! Good luck at the track!!

Stock LIM?

I was under the impression PFS street port was only intake porting (at least when Peter owned the shop), anything going on with your exhaust ports?
Old 11-18-05 | 09:12 PM
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Originally Posted by pluto
Titan ran 45psi on their supra running C16. There's also C23 available that is good for around 60psi.
I didn't think C23 was all that good. We haven't had very good luck with it at all. Only a little better than C16 from our testing.

The only way to go for high boost high hp is VP import. A LITTLE pricey at almost $20 a gallon but well worth it for the high hp cars. On a race weekend it isn't suprising to go through $100+ worth of gas per day. Good thing we have it sponsored or we'd be running alcohol probably.
Old 11-19-05 | 02:22 AM
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I don't like C-23. It's almost like trying to burn diesel in a rotary! VP import on the other hand is almost as good as alcohol but it's very expensive. I've ran 35psi reliable with C-16. I'm going to be trying 38 to 40 psi shortly with C-16 and also with a mix of methanol.
Old 11-19-05 | 11:51 PM
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Originally Posted by dubulup
Those numbers are out of this world!! Good luck at the track!!

Stock LIM?

I was under the impression PFS street port was only intake porting (at least when Peter owned the shop), anything going on with your exhaust ports?
Yes, stock UIM, and LIM.....for now... And the street port was to the intake and exhaust.
Attached Thumbnails PFS Tuned GT42R makes 643RWHP!!!-p1010204.jpg  
Old 11-19-05 | 11:57 PM
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Ernie....What's the latest times?



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