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      08-08-2017, 03:50 PM   #1
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Am I really hitting 18 PSI? JB4 Map 5

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CTS Intercooler & Intake
JB4 on Map 5
3.5-3.6 gallons of e85 at every fillup of 91 octane for about 4-5 fill ups
PWG car

So for the first time I've put e85 in back to back with every fill up.

I did a short 5th gear pull and the JB4 app auto logged it. After looking through the logs it appears (to my very untrained eyes) I'm hitting upwards of 18PSI. Is this data correct? Maybe the logs are to short?

Prior to running e85 all the time I rarely saw anything above about 14.5 PSI.

If this is valid data should I be concerned seeing as I'm running a stock CP and DP?

Thanks!

http://datazap.me/u/lpfake/18-psi?lo...a=1-3-4-5-6-19
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      08-08-2017, 03:55 PM   #2
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You need to do a 3rd gear pull, not 5th. From 3k to redline
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      08-08-2017, 03:57 PM   #3
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Quote:
Originally Posted by mbanks21 View Post
You need to do a 3rd gear pull, not 5th. From 3k to redline
I was told 2nd gear but I guess it depends on the car tranny. I have a 6MT so I was told to go in 2nd gear 2k to redline
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      08-08-2017, 03:58 PM   #4
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Quote:
Originally Posted by Chicken_Joe
Quote:
Originally Posted by mbanks21 View Post
You need to do a 3rd gear pull, not 5th. From 3k to redline
I was told 2nd gear but I guess it depends on the car tranny. I have a 6MT so I was told to go in 2nd gear 2k to redline
I'm MT as well I was always told 3rd gear
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      08-08-2017, 04:12 PM   #5
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Ok, I know we need a good 3-4 full gear pull for good logs but was curious if these logs are valid at all...

Theoretically if my car really is getting up to 18 PSI would that be cause for concern especially with no aftermarket DP? I'm pretty certain the CP will pop but I'm just not sure what kind of issues having that much boost and restriction with a stock DP causes.

Thanks all!
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      08-08-2017, 04:27 PM   #6
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Think of it like doing a dyno in a random gear. Yes it's accurate info but it's not accurate for what you're attempting to accomplish. A DP will really open up your car, probably another 30hp or so. And you better get a new CP on there like yesterday before you end up on the side of the road.
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      08-08-2017, 04:47 PM   #7
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Thanks mbanks, appreciate the response.

MODS, feel free to delete.

Thanks!!
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      08-08-2017, 08:13 PM   #8
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18psi in 5th definitely. Go iso and you can see 21-22psi in 3rd
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      08-08-2017, 09:47 PM   #9
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badbread the power of E85
for Stock CP/DP this is nice, you should dyno it before i see you in the dark side #Bootmod3
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      08-09-2017, 12:39 AM   #10
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Quote:
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badbread the power of E85
for Stock CP/DP this is nice, you should dyno it before i see you in the dark side #Bootmod3
I know your feels badbread. Nervous as tits when the boost hits on a stock charge pipe. I also have multiple pulls @17-18psi in 3rd gear on shitty Canadian 91. 8sp pwg.

Mods are OTS stg 1 bootmod3 map rocking a Cts turbo fmic and Intake. But my ign timing was out so I've switched to chevron 94 and ordered some new NGK plugs( as per Dzenan).
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