yoda598 Posted October 8, 2020 Share Posted October 8, 2020 hey guys, i was tuning my bf xr6t on e85 yesterday and it got me thinking. what's the most timing you've seen a stock barra take on e85 at say 10psi-19psi? mine kept making power far past what i thought itd take, even on e85!! 19deg high in the rpm range and still climbing at 18psi! i got nervous and stopped hahaha Quote Link to comment Share on other sites More sharing options...
MrSafe Posted October 8, 2020 Share Posted October 8, 2020 Being on e85 means you can mbt it up top, keep putting timing in until it stops yielding reasonable gains. Remeber it will never ping/knock on e85, if you add to much timing you will start to lose power. Quote Link to comment Share on other sites More sharing options...
yoda598 Posted October 9, 2020 Author Share Posted October 9, 2020 But how far is too far lol Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 10, 2020 Share Posted October 10, 2020 On 10/9/2020 at 4:22 PM, yoda598 said: But how far is too far lol Do not go past MBT. MBT is defined as when you stop making torque and start to go backwards. You need a load cell dyno to calibrate MBT accurately. MBT will be different depending on lots of things such as intake and coolant temp, there is no magic number. 1 Quote Link to comment Share on other sites More sharing options...
BeerTurbo Posted November 19, 2020 Share Posted November 19, 2020 have you read jets thread on xr6turbo? sometime he puts out some wisdom, but as a tuner they aren't going to tell you what they have spent hours finding out, not for free anyway. https://www.fordxr6turbo.com/forum/topic/84077-jets-tuning-oh-no/page/193/?tab=comments#comment-1683202 Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 19, 2020 Share Posted November 19, 2020 On the dyno I got 17 degrees into my built motor at 19psi and 98 octane before it showed any detonation. There was no knock at 16 degrees however I took it down to 13-14 degrees and it went from 370awkw to 350awkw. I'll be doing some more e85 testing on the dyno soon so I'll see how much it can take before it stops making power. 1 Quote Link to comment Share on other sites More sharing options...
yoda598 Posted November 19, 2020 Author Share Posted November 19, 2020 i have a bf s1 so im abit concerned to go past 15-16psi. on e85 ive got around 16 degrees in it, seems happy there. unsure of how much illl get away with on 98. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 19, 2020 Share Posted November 19, 2020 Yeah I wouldn't want to risk going further than you have already with the thinner rods. It's also the wrong weather to try and push cars on the dyno! Quote Link to comment Share on other sites More sharing options...
yoda598 Posted November 19, 2020 Author Share Posted November 19, 2020 yeah exactly. the engines seen 22psi (by accident of course) but didnt pop. short of removing engine and pulling the sump to check ill just assume it has the skinny rods and be thankful one didnt exit on that over boost. 1 Quote Link to comment Share on other sites More sharing options...
JETURBO Posted November 19, 2020 Share Posted November 19, 2020 8 hours ago, BeerTurbo said: have you read jets thread on xr6turbo? sometime he puts out some wisdom, but as a tuner they aren't going to tell you what they have spent hours finding out, not for free anyway. https://www.fordxr6turbo.com/forum/topic/84077-jets-tuning-oh-no/page/193/?tab=comments#comment-1683202 Sometimes ? LoL never, i hear he’s a total butt stick O.P ..... Buy a stand alone Knock detection device, Hire a Dyno, Report back That’s the answer 2 Quote Link to comment Share on other sites More sharing options...
BeerTurbo Posted November 19, 2020 Share Posted November 19, 2020 2 minutes ago, JETURBO said: Sometimes ? LoL never, i hear he’s a total butt stick He spends to much time cleaning customer cars for those #instragram carporn posts, not sure he even tunes. Quote Link to comment Share on other sites More sharing options...
JETURBO Posted November 19, 2020 Share Posted November 19, 2020 It’s Funny because i still don’t social media, still don’t think I’m missing anything hahaha You must be a fly on the wall today as i did clean the underside of a FGX XR8 5.0S/C before i fitted a new exhaust... OCD...something something 1 Quote Link to comment Share on other sites More sharing options...
BeerTurbo Posted November 19, 2020 Share Posted November 19, 2020 @JETURBO pulling ya leg of course, i love the photos you put up in that tuning thread, allways the cleanest cars after they have been near you. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 20, 2020 Share Posted November 20, 2020 On 11/19/2020 at 5:33 PM, Puffwagon said: On the dyno I got 17 degrees into my built motor at 19psi and 98 octane before it showed any detonation. There was no knock at 16 degrees however I took it down to 13-14 degrees and it went from 370awkw to 350awkw. Haha quoting myself here, I got the car on the dyno this afternoon with the exhaust pulled off and it looked like it showed a bit of knock in the graph at 13-14 degrees of timing and 22psi on 98 octane from ampol. It might have been fine with BP 98 and maybe not. It made 409awkw for the record. 23 hours ago, JETURBO said: FGX XR8 5.0S/C A nice car. Updooted for shiny 😁 Quote Link to comment Share on other sites More sharing options...
JETURBO Posted November 20, 2020 Share Posted November 20, 2020 it’s a reasonable effort Nathan and you’ve got a pretty quick bus indeed now ! I was going to post it on the turbo forum but here is as good as any and something you would be able to pre determine before a result... if you see a result, it’s damage done ( Potentially ) 14* on 98 with 23psi is pretty hectic but... but depending on the build, compression and a huge array of other factors ( that can always change ) it might be right. Knock detection will be screaming way before this and or any scanner KR activity as calibrated Knock detection does wonderful things for your eyes/ears/data logs and you can avoid Dyno graph detection 1 Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 20, 2020 Share Posted November 20, 2020 Cheers man. Yerp I'll get my knock ears out this weekend and make them work. They wouldn't work properly with my laptop for whatever reason, likely old etc, but I can use the missus laptop now. I've got tuner nerd with 2 sensors. Quote Link to comment Share on other sites More sharing options...
yoda598 Posted November 20, 2020 Author Share Posted November 20, 2020 Yeah I need to get mine on the dyno again. It's around 15psi at the moment as I've said above but I've had it on 18psi for afew weeks. I got scared of the skinny rods. Although I've been told they'll do 350kw on e85 apparently. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 22, 2020 Share Posted November 22, 2020 Ok a good result today. I got the knock detection working through the headphones as well as the Tuner Nerd software. There was no knock at all running up and down the road at 19psi and 13-14 degrees of timing. I'm glad I got it sorted so I can take better care of my engine. Quote Link to comment Share on other sites More sharing options...
yoda598 Posted November 22, 2020 Author Share Posted November 22, 2020 7 hours ago, Puffwagon said: Ok a good result today. I got the knock detection working through the headphones as well as the Tuner Nerd software. There was no knock at all running up and down the road at 19psi and 13-14 degrees of timing. I'm glad I got it sorted so I can take better care of my engine. thats brilliant. on 98 still too i think you mentioned. where did you get your knock detection gear if you dont mind me asking. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted November 22, 2020 Share Posted November 22, 2020 Yes that's on 98. I bought the Knock Monitor Pro V3 Elite straight through the website https://tunernerd.com/ Quote Link to comment Share on other sites More sharing options...
JMSMotorsport Posted February 8, 2021 Share Posted February 8, 2021 Puffwagon - If you don't mind sharing when your running that sort of timing on 98 what Lambda are you targeting? Also how do you like the tunernerd knock monitor been looking at this to add to my Knock Box ears.. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted February 8, 2021 Share Posted February 8, 2021 Just the usual, around 0.8 to 0.82. Tuner nerd is great, I love it. Quote Link to comment Share on other sites More sharing options...
JMSMotorsport Posted February 8, 2021 Share Posted February 8, 2021 10 hours ago, Puffwagon said: Just the usual, around 0.8 to 0.82. Tuner nerd is great, I love it. Cheers, well that makes that my next tuning purchase. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted February 9, 2021 Share Posted February 9, 2021 I only run that timing cos the motor is happy there. I certainly wouldn't do that with a stock motor. Quote Link to comment Share on other sites More sharing options...
JMSMotorsport Posted February 9, 2021 Share Posted February 9, 2021 28 minutes ago, Puffwagon said: I only run that timing cos the motor is happy there. I certainly wouldn't do that with a stock motor. Lower Comp? Forged Pistons? What have you pushed a stock bottom end to? Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted February 9, 2021 Share Posted February 9, 2021 Yeah it is a built motor with a 40 thou MLS gasket. Comp will be mid 8's. I've pushed about 480 through a stock bottom end and also had one let go at about 350. 1 Quote Link to comment Share on other sites More sharing options...
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