Boost logs from my BP precision 6765 billet turbo setup
08-07-2010, 02:24 PM
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Boost logs from my BP precision 6765 billet turbo setup
Ok, here are some printouts.
Boosted performance 6765 billet wheel precision turbo kit. Full built engine, heads, cams.
pic 1 5th gear, 10psi 3500rpms
pic 2 5th gear 13psi 3900rpms
pic 3 is 4th gear, 10psi at 3841rpms
pic 4 is 4th gear, 13psi at 4080 rpms
rich was curious about these numbers. This is UNTUNED. I have timing pulled way back as you can see in the top frame of the picture.
I'll have more stuff on my build thread after my tune august 28th.
Boosted performance 6765 billet wheel precision turbo kit. Full built engine, heads, cams.
pic 1 5th gear, 10psi 3500rpms
pic 2 5th gear 13psi 3900rpms
pic 3 is 4th gear, 10psi at 3841rpms
pic 4 is 4th gear, 13psi at 4080 rpms
rich was curious about these numbers. This is UNTUNED. I have timing pulled way back as you can see in the top frame of the picture.
I'll have more stuff on my build thread after my tune august 28th.
08-07-2010, 07:47 PM
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So ya, most dyno in 5th, sometimes they do it in 4th. That's why i chose those gears to compare. Comparing a lower gear to a dyno wouldn't be the same since there is more load in higher gears therefore it will build boost sooner.
I think it builds 10psi around 4100rpms in 3rd gear. Not sure about second gear because if i'm doing a roll i usually don't go WOT until 4500-5000 rpms anyways.
08-08-2010, 09:15 AM
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well, 13psi at least. I'm not tuned yet so that's definitely not my full boost.
So ya, most dyno in 5th, sometimes they do it in 4th. That's why i chose those gears to compare. Comparing a lower gear to a dyno wouldn't be the same since there is more load in higher gears therefore it will build boost sooner.
I think it builds 10psi around 4100rpms in 3rd gear. Not sure about second gear because if i'm doing a roll i usually don't go WOT until 4500-5000 rpms anyways.
So ya, most dyno in 5th, sometimes they do it in 4th. That's why i chose those gears to compare. Comparing a lower gear to a dyno wouldn't be the same since there is more load in higher gears therefore it will build boost sooner.
I think it builds 10psi around 4100rpms in 3rd gear. Not sure about second gear because if i'm doing a roll i usually don't go WOT until 4500-5000 rpms anyways.
08-08-2010, 02:23 PM
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and yes, right now my car is driving like crap in the midrange. I'm not near as good as hal so it's not smooth. It's not BAD, but it's definitely not smooth. For some reason i just can't get it dialed in smooth like i did on my dw 800's. Hal will get it all fixed up for me though.
As far as driving, we hit some twisties last night. The "lag" wasn't noticed since rpms never really dropped below 5k anyways. I was nervous about building boost high but after last night i realized that i'll never have it down that low in rpms when i need power.
08-09-2010, 07:47 AM
#9
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spool looks good so far...you will probably gain a little more spool (maybe 100-200rpm) after tuning.
I'll have to go out later and see what boost I am hitting at 4k rpm (wanna say in the 8-10psi range).
Tom
I'll have to go out later and see what boost I am hitting at 4k rpm (wanna say in the 8-10psi range).
Tom
08-09-2010, 08:41 AM
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13PSI is your max? If you are shooting for higher then that then the curve is not going to hit ~18psi til 4500 or 5000. I hope you set your redline high but you'll need a lot of other stuff to accomplish that. PM me for details.
08-09-2010, 03:45 PM
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08-09-2010, 03:49 PM
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We're tuning to e85 so probably in the mid 20's for psi. I understand full boost will be later. The numbers i posted were for rich since he was asking how spool is on this turbo compared to the Intense 4088r turbo build.
Redline will be back up to 8k or 8500 again once it's fully tuned and safe. pauter rods, arais ed pistons, forged crank, heads, etc. It's turned 8k before, but it won't again until it's on a dyno and i know it's safe. Too much invested to screw it up.
08-10-2010, 05:15 PM
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