Who's boostin 15 + psi on stock heads??
06-07-2010, 02:43 PM
#1
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Who's boostin 15 + psi on stock heads??
I am getting serious on this build, if poss I would like to run stock 317 heads, that is worked over.. I will be studding them. Just curious if they can with stand that kind of boost on a DD.. Thanks for any info ya got.. 
Last edited by Mangled03gmc; 06-07-2010 at 03:09 PM.
06-07-2010, 02:52 PM
#2
15-20lbs is reasonably doable on stock stuff, its 20+ imo where it gets a little iffy with the stock style heads, in the end it all comes down to no detonation to keeping them flat obviously..
Last edited by skolman91; 06-08-2010 at 12:13 AM.
06-07-2010, 03:51 PM
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I'm running almost 20psi using E85. IMHO its fuel vs. timing that allows me to run higher boost. More boost = less timing. But everyone just looks at how much boost you can run. I'm able to run 19 degrees of timing with E85 and with gasoline I don't think I could run 8 degrees with 20psi without blowing it up.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
06-07-2010, 04:23 PM
#5
I'm running almost 20psi using E85. IMHO its fuel vs. timing that allows me to run higher boost. More boost = less timing. But everyone just looks at how much boost you can run. I'm able to run 19 degrees of timing with E85 and with gasoline I don't think I could run 8 degrees with 20psi without blowing it up.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
06-07-2010, 05:26 PM
#6
I'm running almost 20psi using E85. IMHO its fuel vs. timing that allows me to run higher boost. More boost = less timing. But everyone just looks at how much boost you can run. I'm able to run 19 degrees of timing with E85 and with gasoline I don't think I could run 8 degrees with 20psi without blowing it up.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
06-07-2010, 06:42 PM
#7
I'm running almost 20psi using E85. IMHO its fuel vs. timing that allows me to run higher boost. More boost = less timing. But everyone just looks at how much boost you can run. I'm able to run 19 degrees of timing with E85 and with gasoline I don't think I could run 8 degrees with 20psi without blowing it up.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
I started tuning with E85 at 12 degrees and worked it up to 21 without knock. So I backed it off a couple and called it good. Put about 15k miles on this build with a fair bit of WOT running.
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06-08-2010, 12:42 AM
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Forged 6.0, cam, heads plus the full bolt on setup with a 25% OD cogged TVS2300, Innovators Crank Pulley and a 3.0 front pulley. Including fuel system that will support 1500hp on gas.
This truck hasn't been to the track and probably won't ever make it to one.
I've never done any comparisons sorry. But I can run a lot more timing with the E85
Comparing gas and E85 at the same almost 20psi is something I wouldn't do. I don't think I could get close to 20psi on pump gas without blowing it up.
My fuel mileage did go down but only about 10%. I run the AFR in the 15 range at cruise. Again sorry no track times only a few GTech runs. And when I had it on the dyno it was still blowing belts so I never got a full run on it. So how is that for worthless
information:nunchuk1:
This truck hasn't been to the track and probably won't ever make it to one.
I've never done any comparisons sorry. But I can run a lot more timing with the E85
My fuel mileage did go down but only about 10%. I run the AFR in the 15 range at cruise. Again sorry no track times only a few GTech runs. And when I had it on the dyno it was still blowing belts so I never got a full run on it. So how is that for worthless
information:nunchuk1:
, but seriously what heads, comp ratio, and fuel system break down?(pump/s line and rail size). also you should at least get it on the dyno again and get some numbers..