Traé’s Goblin (06’ SS/SC #501)
- Thread starter Traé
- Start date
Rauq
Goblin Guru
Your as-found is has fuel injector data, a bit more timing, and less computer restriction on boost. MAF and VE are the same as the stock file you provided, which is less than ideal, especially in a Goblin. Seems like a very basic injector + pulley tune. Interestingly, the RPM limiter is 6500 in the as-found vs 7000 in the stock tune. I thought that would've been the opposite but what do I know. Interestingly, the dynamic air high RPM disable is raised in the as-found vs stock. I don't dislike that, but it has to have good VE and MAF tuning to work well (vs just good MAF tuning if it's lowered).
The second non-stock tune (60lb Injectors 2.8 Pulley) is basically MAF only everywhere (dynamic airflow high RPM disable at 400rpm), which I'm not personally a fan of. In my opinion, that's a bandaid for not having good VE tuning. RPM limit in that tune is 7500 which is not bad, just unnecessary on a stock motor. There's a lot of tiny tweaks in spark timing, but nothing meaningful or strongly preferable that I can see.
The second non-stock tune (60lb Injectors 2.8 Pulley) is basically MAF only everywhere (dynamic airflow high RPM disable at 400rpm), which I'm not personally a fan of. In my opinion, that's a bandaid for not having good VE tuning. RPM limit in that tune is 7500 which is not bad, just unnecessary on a stock motor. There's a lot of tiny tweaks in spark timing, but nothing meaningful or strongly preferable that I can see.
Traé
Goblin Guru
Whoops, sorry...changes are 60lb Injectors (Siemens 107961) and a 2.8" Pulley
I have been diving into it more and looking at the injectors. The current file does not seem to be setup for the injectors I have in the car and the curve has a big spike in it when the others I look at are a smooth curve.
Rauq
Goblin Guru
I bought my 80's from ZZP and their response to a support ticket request for injector data was basically "it's on the webpage where you bought the injectors" which is not much more info than "they're 80lb/hr injectors"
The data I'm running came from cross-referencing several ZZP tunes with 80# injectors. I figured if that's what they use then I probably can't come up with anything better.
You can theoretically turn off all fueling adjustments and bump the injector data one way or another and dial things in that way but I think tuning effort is spent much more productively tuning MAF and VE data once you've got decent injector data. In an ideal world, yes, you'd have spot on injector data before doing anything, but here we are....
I don't have the tunes in front of me at the moment, where's the big spike you're looking at?
Traé
Goblin Guru
You can very easily run into idle, decel and starting issues though. It really isn't a matter of flowrate as it is the settings that come into play at the low flow rate. short pulse settings. The flow rate can be fudged in or the VE table modified to make it work at larger throttle openings.
Rauq
Goblin Guru
Agreed, the point I was trying to make was, once you have the best injector data you can find, the next best improvements to be had will come from MAF and VE tuning, rather than trying to tweak short pulse adder by 0.1ms and wondering if that helped or hurt.
Assuming you got your 60# injectors from ZZP, I would suggest trying to track down some ZZP tunes that use the same injectors and copying most, if not all, of the injector data into your tune. I seem to recall from when I was looking around there were more 60# tunes than 80#, so hopefully you can find some good data. Do note that E85 tunes and boost reference fuel pressure systems may have different data even if the injectors are the same.
Traé
Goblin Guru
Injectors were in the car, might be causing some of the weird issues I have been having with it running so rich.
I found a spreadsheet to get the info input for these injectors on the HP Tuners forum. I have a file made with the correct parameters, just need to get credits and flash the car if I have time this weekend.
I have compared the file I made with a similar spec goblin tune I found on the forum, and it matches up.
Thank you for looking into this.
Traé
Goblin Guru
Unfortunately that is the assumption, I do not have any other information on them.
Traé
Goblin Guru
So, I just need to make this post because I can’t believe it…I got a new goblin yesterday!
Not entirely, but after actually tuning for the right injectors
it’s like a completely different car. So much more enjoyable to drive.
I was able to dial in the MAF and will work on speed density next time I have a chance.
No more power issues at high rpm, choppy idle, or touchy pedal. I will now have to get used to it again.
Not entirely, but after actually tuning for the right injectors
it’s like a completely different car. So much more enjoyable to drive.I was able to dial in the MAF and will work on speed density next time I have a chance.
No more power issues at high rpm, choppy idle, or touchy pedal. I will now have to get used to it again.
ah.b.normal
Goblin Guru
"I Do love it when a plan comes together!" Col. Hannibal Smith(US Army, Ret.) Cheers! From me.So, I just need to make this post because I can’t believe it…I got a new goblin yesterday!
Not entirely, but after actually tuning for the right injectors
I was able to dial in the MAF and will work on speed density next time I have a chance.
No more power issues at high rpm, choppy idle, or touchy pedal. I will now have to get used to it again.
Robinjo
Goblin Guru
Did you tune it yourself, grab another tune and work with it or get ZZP to remote tune it?So, I just need to make this post because I can’t believe it…I got a new goblin yesterday!
Not entirely, but after actually tuning for the right injectors
I was able to dial in the MAF and will work on speed density next time I have a chance.
No more power issues at high rpm, choppy idle, or touchy pedal. I will now have to get used to it again.
Traé
Goblin Guru
I compared what I had to others but ended up finding a spreadsheet online for my injectors to put in. After that I tuned the MAF by myself. Still need to change some things but it’s supposed to rain all week.